diff --git a/plugins/org.eclipse.actf.visualization.engines.lowvision/META-INF/MANIFEST.MF b/plugins/org.eclipse.actf.visualization.engines.lowvision/META-INF/MANIFEST.MF
index 51998d8..fab45d1 100644
--- a/plugins/org.eclipse.actf.visualization.engines.lowvision/META-INF/MANIFEST.MF
+++ b/plugins/org.eclipse.actf.visualization.engines.lowvision/META-INF/MANIFEST.MF
@@ -12,5 +12,5 @@
  org.eclipse.actf.model.ui
 Export-Package: org.eclipse.actf.visualization.engines.lowvision,
  org.eclipse.actf.visualization.engines.lowvision.image
-Eclipse-LazyStart: true
+Bundle-ActivationPolicy: lazy
 Bundle-RequiredExecutionEnvironment: J2SE-1.5
diff --git a/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/engines/lowvision/LowVisionType.java b/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/engines/lowvision/LowVisionType.java
index fedf95b..73b82d0 100644
--- a/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/engines/lowvision/LowVisionType.java
+++ b/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/engines/lowvision/LowVisionType.java
@@ -127,7 +127,7 @@
 	 */
 	public void setEyesightDegree(float _deg) throws LowVisionException {
 		if (_deg <= 0.0) {
-			throw new LowVisionException("Eyesight degree must be positive.");
+			throw new LowVisionException("Eyesight degree must be positive."); //$NON-NLS-1$
 		}
 		eyesightDegree = _deg;
 		eyesightPixel = calcUndistinguishablePixel(eyesightDegree);
@@ -223,7 +223,7 @@
 	 */
 	public void setCVDType(int cvd_type) throws LowVisionException {
 		if (cvd_type != 1 && cvd_type != 2 && cvd_type != 3) {
-			throw new LowVisionException("CVD type must be 1,2, or 3");
+			throw new LowVisionException("CVD type must be 1,2, or 3"); //$NON-NLS-1$
 		}
 		CVDType = cvd_type;
 	}
@@ -258,6 +258,7 @@
 		return (rgb);
 	}
 
+	@SuppressWarnings("nls")
 	private void setColorFilterRGB(float _r, float _g, float _b)
 			throws LowVisionException {
 		if (_r < 0.0 || 1.0 < _r)
@@ -392,6 +393,7 @@
 		return (dest);
 	}
 
+	@SuppressWarnings("nls")
 	public String toString() {
 		StringBuffer sb = new StringBuffer();
 		if (eyesight) {
diff --git a/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/engines/lowvision/PageEvaluation.java b/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/engines/lowvision/PageEvaluation.java
index 7473a5a..1d2a8fc 100644
--- a/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/engines/lowvision/PageEvaluation.java
+++ b/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/engines/lowvision/PageEvaluation.java
@@ -60,9 +60,9 @@
 
 	private int pageHeight = UNSET;
 
-	private String overallRatingString = "";
+	private String overallRatingString = ""; //$NON-NLS-1$
 
-	private String overallRatingImageString = "";
+	private String overallRatingImageString = ""; //$NON-NLS-1$
 
 	/**
 	 * Constructor of PageEvaluation utility
@@ -272,6 +272,8 @@
 	 *            target file path to save report
 	 * @throws LowVisionException
 	 */
+	@SuppressWarnings("nls")
+	//TODO
 	public void unsupportedModeReport(File targetFile)
 			throws LowVisionException {
 
@@ -306,6 +308,8 @@
 	 *            target {@link IProblemItem} list
 	 * @throws LowVisionException
 	 */
+	@SuppressWarnings("nls")
+	// TODO
 	public void generateReport(String _path, String _htmlName, String _imgName,
 			List<IProblemItem> _problemGroupArray) throws LowVisionException {
 		boolean doMakeProblemMap = true;
@@ -389,11 +393,11 @@
 				}
 			}
 
-			double scaleDouble = (double) (scale * scale);
+			double scaleDouble = (scale * scale);
 			for (int j = 0; j < mapHeight; j++) {
 				for (int i = 0; i < mapWidth; i++) {
 					scoreMap.getData()[j][i] = DecisionMaker
-							.getScoreMapColor(((double) (scoreMap.getData()[j][i]))
+							.getScoreMapColor((scoreMap.getData()[j][i])
 									/ 100.0 / scaleDouble);
 				}
 			}
diff --git a/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/DebugUtil.java b/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/DebugUtil.java
index 89e0337..c4a41f8 100644
--- a/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/DebugUtil.java
+++ b/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/DebugUtil.java
@@ -19,7 +19,7 @@
 	// public static String DEBUG_STRING = "style-addcss-page-post-cache-diff";
 	// private static final String DEBUG_STRING =
 	// "post-genRE-infoSet-diff-cache";
-	private static final String DEBUG_STRING = "TRACE";
+	private static final String DEBUG_STRING = "TRACE"; //$NON-NLS-1$
 
 	// private static final String DEBUG_STRING =
 	// "TRACE_HISTOGRAM_CONTAINER_EXTRACT_PROBLEM_COMPONENT_REPORT";
@@ -55,15 +55,15 @@
 
 	public static void printMsg(Object o, String s, PrintStream ps, int level) {
 		if (level != 0) {
-			ps.println("--------------------------------");
+			ps.println("--------------------------------"); //$NON-NLS-1$
 		}
 		if (o != null) {
-			ps.println(o.getClass().getName() + ": " + s);
+			ps.println(o.getClass().getName() + ": " + s); //$NON-NLS-1$
 		} else {
 			ps.println(s);
 		}
 		if (level != 0) {
-			ps.println("--------------------------------");
+			ps.println("--------------------------------"); //$NON-NLS-1$
 		}
 		ps.flush();
 	}
diff --git a/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/DecisionMaker.java b/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/DecisionMaker.java
index df831af..3b2abe7 100644
--- a/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/DecisionMaker.java
+++ b/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/DecisionMaker.java
@@ -35,6 +35,7 @@
  * Check color combination by using threshold (in LowvisionCommon)
  * 
  */
+@SuppressWarnings("nls")
 public class DecisionMaker {
 
 	// thresholds for char check
@@ -79,7 +80,7 @@
 	public static final float ENOUGH_DELTA_E_FOR_IMAGE = 40.0f;
 	// color combination check (text)
 	public static final float MIN_ENOUGH_DELTA_L_FOR_TEXT = 20.0f; // enough L
-																	// (L*a*b*)
+	// (L*a*b*)
 	public static final float MAX_ENOUGH_DELTA_L_FOR_TEXT = 40.0f; // (L*a*b*)
 	public static final float ENOUGH_DELTA_E_FOR_TEXT = 100.0f; // (L*a*b*)
 	public static final float ENOUGH_DELTA_H_FOR_TEXT = 100.0f; // (L*a*b*)
@@ -103,7 +104,7 @@
 		// very small
 		if (cWidth < DecisionMaker.THRESHOLD_MIN_CHAR_WIDTH
 				|| cHeight < DecisionMaker.THRESHOLD_MIN_CHAR_HEIGHT) {
-			return (PageComponent.OTHER_TYPE );
+			return (PageComponent.OTHER_TYPE);
 		}
 
 		double density = _cc.getDensity();
@@ -114,7 +115,7 @@
 			throw new ImageException(
 					"detectLongestHorizontalLine() does not work.");
 		}
-		double widthRatio = horSeg.getLength() / (double) cWidth;
+		double widthRatio = horSeg.getLength() / cWidth;
 		double position = (double) (horSeg.getLeftPoint().getY())
 				/ (double) cHeight;
 		double ratio = (double) cWidth / (double) cHeight;
@@ -122,32 +123,32 @@
 				&& position >= DecisionMaker.THRESHOLD_MIN_UNDERLINE_POSITION
 				&& ratio >= DecisionMaker.THRESHOLD_MIN_UNDERLINE_RATIO
 				&& density < DecisionMaker.THRESHOLD_MIN_CONTAINER_DENSITY) {
-			return (PageComponent.CANDIDATE_UNDERLINED_CHARACTER_TYPE );
+			return (PageComponent.CANDIDATE_UNDERLINED_CHARACTER_TYPE);
 		}
 
 		// container
 		if ((cWidth > DecisionMaker.THRESHOLD_MAX_CHAR_WIDTH || cHeight > DecisionMaker.THRESHOLD_MAX_CHAR_HEIGHT)) {
-			return (PageComponent.CONTAINER_TYPE );
+			return (PageComponent.CONTAINER_TYPE);
 		}
 
 		// small (might be line)
 		if (ratio < DecisionMaker.THRESHOLD_MIN_CHAR_RATIO
 				|| DecisionMaker.THRESHOLD_MAX_CHAR_RATIO < ratio) {
-			return (PageComponent.OTHER_TYPE );
+			return (PageComponent.OTHER_TYPE);
 		}
 
 		// test
 		/*
 		 * Topology topo = new Topology( _cc ); Topology thinTopo = new
-		 * Topology( _cc.thinning() ); int count1 = topo.getCount(); int count2 =
-		 * thinTopo.getCount(); int interior1 = topo.getNumInterior(); int
+		 * Topology( _cc.thinning() ); int count1 = topo.getCount(); int count2
+		 * = thinTopo.getCount(); int interior1 = topo.getNumInterior(); int
 		 * interior2 = thinTopo.getNumInterior(); int edge1 =
 		 * topo.getNumEdges(); int edge2 = thinTopo.getNumEdges(); int branch1 =
 		 * topo.getNumBranches(); int branch2 = thinTopo.getNumBranches(); int
 		 * cross1 = topo.getNumCrosses(); int cross2 = thinTopo.getNumCrosses();
 		 * 
-		 * double countDouble = (double)(topo.getCount()); double interiorRatio =
-		 * (double)(topo.getNumInterior())/countDouble; double edgeRatio =
+		 * double countDouble = (double)(topo.getCount()); double interiorRatio
+		 * = (double)(topo.getNumInterior())/countDouble; double edgeRatio =
 		 * (double)(topo.getNumEdges())/countDouble; double branchRatio =
 		 * (double)(topo.getNumBranches())/countDouble; double crossRatio =
 		 * (double)(topo.getNumCrosses())/countDouble;
@@ -162,34 +163,35 @@
 		// thinning
 		ConnectedComponent thinCc = _cc.thinning();
 		if ((double) (thinCc.getCount()) / (double) (_cc.getCount()) < DecisionMaker.THRESHOLD_MIN_THINNING_RATIO) {
-			return (PageComponent.OTHER_TYPE );
+			return (PageComponent.OTHER_TYPE);
 		}
 
 		Topology thinTopo = new Topology(thinCc);
 		if (thinTopo.getNumBranches() > DecisionMaker.THRESHOLD_MAX_THINNED_BRANCHES) {
-			return (PageComponent.OTHER_TYPE );
+			return (PageComponent.OTHER_TYPE);
 		}
 		if (thinTopo.getNumCrosses() > DecisionMaker.THRESHOLD_MAX_THINNED_CROSSES) {
-			return (PageComponent.OTHER_TYPE );
+			return (PageComponent.OTHER_TYPE);
 		}
 
 		// debug(from here)
 		/*
-		 * if( _test ){ int ccX = _cc.getLeft(); int ccY = _cc.getTop(); int ccW =
-		 * _cc.getWidth(); int ccH = _cc.getHeight(); DebugUtil.debugMsg( null,
-		 * "Judging container at (" + ccX + "," + ccY + ") [" + ccW + " x " +
-		 * ccH + "] : count=(" + count1 + "," + count2 + ") interior=(" +
-		 * interior1 + "," + interior2 + ") edge=(" + edge1 + "," + edge2 + ")
+		 * if( _test ){ int ccX = _cc.getLeft(); int ccY = _cc.getTop(); int ccW
+		 * = _cc.getWidth(); int ccH = _cc.getHeight(); DebugUtil.debugMsg(
+		 * null, "Judging container at (" + ccX + "," + ccY + ") [" + ccW +
+		 * " x " + ccH + "] : count=(" + count1 + "," + count2 + ") interior=("
+		 * + interior1 + "," + interior2 + ") edge=(" + edge1 + "," + edge2 + ")
 		 * branch=(" + branch1 + "," + branch2 + ") cross=(" + cross1 + "," +
 		 * cross2 + ")", "COMPONENT" ); // DebugUtil.debugMsg( null, "Judging
 		 * container at (" + ccX + "," + ccY + ") [" + ccW + " x " + ccH + "] :
-		 * count = " + topo.getCount() + ", interiorRatio = " + interiorRatio + ",
-		 * edgeRatio = " + edgeRatio + ", branchRatio = " + branchRatio + ",
-		 * crossRatio = " + crossRatio, "COMPONENT" ); // DebugUtil.debugMsg(
-		 * null, "Density = " + density, "COMPONENT" ); // debug(to here) }
+		 * count = " + topo.getCount() + ", interiorRatio =
+		 * " + interiorRatio + ", edgeRatio = " + edgeRatio + ", branchRatio =
+		 * " + branchRatio + ", crossRatio = " + crossRatio, "COMPONENT" ); //
+		 * DebugUtil.debugMsg( null, "Density = " + density, "COMPONENT" ); //
+		 * debug(to here) }
 		 */
 
-		return (PageComponent.CANDIDATE_CHARACTER_TYPE );
+		return (PageComponent.CANDIDATE_CHARACTER_TYPE);
 	} // judgeComponentType( ConnectedComponent )
 
 	// check connected component is MS character or not
@@ -210,8 +212,8 @@
 		/*
 		 * do not use thinning ConnectedComponent thinCc = _cc.thinning(); //
 		 * debug // DebugUtil.outMsg( null, "thinCc.count = " +
-		 * thinCc.getCount() + ", _cc.count = " + _cc.getCount() + ", Ratio = " +
-		 * (double)(thinCc.getCount())/(double)(_cc.getCount()) ); if(
+		 * thinCc.getCount() + ", _cc.count = " + _cc.getCount() + ", Ratio = "
+		 * + (double)(thinCc.getCount())/(double)(_cc.getCount()) ); if(
 		 * (double)(thinCc.getCount())/(double)(_cc.getCount()) <
 		 * THRESHOLD_MIN_THINNING_RATIO ){ return( false ); }
 		 */
@@ -282,7 +284,6 @@
 	 * 
 	 * criteria for text/image text (bg/fg connected) <- brightness image
 	 * (components are separated in some cases) <- chroma, hue
-	 * 
 	 */
 	public static boolean distinguishableTextColors(ColorLAB _c1, ColorLAB _c2) {
 		double deltaL = ColorLAB.deltaL(_c1, _c2);
@@ -319,11 +320,11 @@
 		 * ColorIRGB i2_ = new ColorIRGB(_c2); ColorIRGB i1_ = new
 		 * ColorIRGB(_c1); int c1R = i1_.getR(); int c1G = i1_.getG(); int c1B =
 		 * i1_.getB(); try{ if( _c2 == ((90<<16)+(93<<8)+90) && (c1R>c1G) &&
-		 * (c1R>c1B) ){ DebugUtil.outMsg( null, "C1: R = " + i1_.getR() + ", G = " +
-		 * i1_.getG() + ", B = " + i1_.getB() ); ColorLAB l1_ = (new
+		 * (c1R>c1B) ){ DebugUtil.outMsg( null, "C1: R = " + i1_.getR() +
+		 * ", G = " + i1_.getG() + ", B = " + i1_.getB() ); ColorLAB l1_ = (new
 		 * ColorIRGB(_c1)).toXYZ().toLAB(); ColorLAB l2_ = (new
-		 * ColorIRGB(_c2)).toXYZ().toLAB(); DebugUtil.outMsg( null, "Delta L = " +
-		 * ColorLAB.deltaL(l1_,l2_) ); DebugUtil.outMsg( null, "Delta E = " +
+		 * ColorIRGB(_c2)).toXYZ().toLAB(); DebugUtil.outMsg( null, "Delta L = "
+		 * + ColorLAB.deltaL(l1_,l2_) ); DebugUtil.outMsg( null, "Delta E = " +
 		 * ColorLAB.deltaE(l1_,l2_) ); } }catch( Exception e ){
 		 * e.printStackTrace(); }
 		 */
@@ -354,7 +355,8 @@
 		return (thresholdL);
 		/*
 		 * double deltaH = ColorLAB.deltaH( _c1, _c2 ); double thresholdL =
-		 * (MIN_ENOUGH_DELTA_L_FOR_TEXT-MAX_ENOUGH_DELTA_L_FOR_TEXT)/ENOUGH_DELTA_H_FOR_TEXT*deltaH +
+		 * (MIN_ENOUGH_DELTA_L_FOR_TEXT
+		 * -MAX_ENOUGH_DELTA_L_FOR_TEXT)/ENOUGH_DELTA_H_FOR_TEXTdeltaH +
 		 * MAX_ENOUGH_DELTA_L_FOR_TEXT; if( thresholdL < 0.0 ){ thresholdL =
 		 * 0.0; } return( thresholdL );
 		 */
@@ -466,8 +468,7 @@
 
 	private static Vector3D colorToVector3D(int _color) {
 		ColorIRGB ci = new ColorIRGB(_color);
-		return (new Vector3D((double) (ci.getR()), (double) (ci.getG()),
-				(double) (ci.getB())));
+		return (new Vector3D(ci.getR(), ci.getG(), ci.getB()));
 	}
 
 	/*
diff --git a/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/EdgeDetector.java b/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/EdgeDetector.java
index 0884225..3f6be7a 100644
--- a/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/EdgeDetector.java
+++ b/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/EdgeDetector.java
@@ -70,7 +70,7 @@
 			destBufferedImage = convolve(srcBufferedImage, 3, 3,
 					LAPLACIAN8_3X3_PLUS);
 		} else {
-			throw new LowVisionException("Unknown method: " + _method);
+			throw new LowVisionException("Unknown method: " + _method); //$NON-NLS-1$
 		}
 	}
 
diff --git a/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/LowVisionProblemConverter.java b/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/LowVisionProblemConverter.java
index cc361a1..7060e2d 100644
--- a/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/LowVisionProblemConverter.java
+++ b/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/LowVisionProblemConverter.java
@@ -30,12 +30,12 @@
 
         for (int i = 0; i < target.length; i++) {
 
-            ProblemItemLV tmp = new ProblemItemLV("L_" + target[i].getLowVisionProblemType());
+            ProblemItemLV tmp = new ProblemItemLV("L_" + target[i].getLowVisionProblemType()); //$NON-NLS-1$
             tmp.setSubType(target[i].getLowVisionProblemType());
             try {
                 tmp.setDescription(target[i].getDescription());
             } catch (Exception e) {
-                tmp.setDescription("unknown");
+                tmp.setDescription("unknown"); //$NON-NLS-1$
             }
             tmp.setCanHighlight(true);
 
@@ -78,9 +78,9 @@
             origR = origAll >> 16 & 0xff;
             origG = origAll >> 8 & 0xff;
             origB = origAll & 0xff;
-            return origR + "," + origG + "," + origB;
+            return origR + "," + origG + "," + origB; //$NON-NLS-1$ //$NON-NLS-2$
         } else {
-            return " ";
+            return " "; //$NON-NLS-1$
         }
     }
 
diff --git a/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/PageElement.java b/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/PageElement.java
index a6d3934..6490b32 100644
--- a/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/PageElement.java
+++ b/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/PageElement.java
@@ -40,7 +40,7 @@
 public class PageElement {
 
 	// IE fontsize
-	static final String IE_LARGEST_FONT = "16pt";
+	static final String IE_LARGEST_FONT = "16pt"; //$NON-NLS-1$
 	static final double IE_EM_SCALING = 1.33; // "1em" in largest
 	// (experimental)
 	static final double IE_LARGER_SCALING = 1.67; // "larger" in largest
@@ -59,9 +59,10 @@
 	public static final double SEVERITY_PROHIBITED_BOTH_COLORS = SEVERITY_PROHIBITED_FOREGROUND_COLOR
 			+ SEVERITY_PROHIBITED_BACKGROUND_COLOR;
 
-	private static final String DELIM = "/";
+	private static final String DELIM = "/"; //$NON-NLS-1$
 
 	// text check
+	@SuppressWarnings("nls")
 	private static final String[] nonTextTagNames = { "area", "base",
 			"basefont", "br", "col", "colgroup", "frame", "frameset", "head",
 			"html", "hr", "img", "input", "isindex", "link", "meta",
@@ -69,6 +70,7 @@
 			"textarea", "title" };
 
 	// tags that change font size when that succeeded pt from <body>
+	@SuppressWarnings("nls")
 	private static final String[] fontSizeChangeTags = { "big", "code", "h1",
 			"h2", "h3", "h5", "h6", "kbd", "pre", "samp", "small", "sub",
 			"sup", "tt" };
@@ -76,6 +78,7 @@
 	/*
 	 * tags that usually uses same font size (can change by using %,em,ex)
 	 */
+	@SuppressWarnings("nls")
 	private static final String[] alwaysFixedFontSizeTags = { "button",
 			"option", "textarea" };
 
@@ -132,7 +135,7 @@
 			backgroundColor = (new ColorCSS(bgStr)).toInt();
 		} catch (ColorException e) {
 			e.printStackTrace();
-			throw new ImageException("Could not interpret colors.");
+			throw new ImageException("Could not interpret colors."); //$NON-NLS-1$
 		}
 	}
 
@@ -178,7 +181,7 @@
 		try {
 			cp = checkColors(_lvType);
 		} catch (LowVisionException e) {
-			DebugUtil.errMsg(this, "Error occurred in checking colors: id = "
+			DebugUtil.errMsg(this, "Error occurred in checking colors: id = " //$NON-NLS-1$
 					+ this.id);
 			e.printStackTrace();
 		}
@@ -191,7 +194,7 @@
 			fsfp = checkFixedSizeFont(_lvType);
 		} catch (LowVisionException e) {
 			DebugUtil.errMsg(this,
-					"Error occurred in checking fixed-size font: id = "
+					"Error occurred in checking fixed-size font: id = " //$NON-NLS-1$
 							+ this.id);
 			e.printStackTrace();
 		}
@@ -201,7 +204,7 @@
 			sfp = checkSmallFont(_lvType);
 		} catch (LowVisionException e) {
 			DebugUtil.errMsg(this,
-					"Error occurred in checking small font: id = " + this.id);
+					"Error occurred in checking small font: id = " + this.id); //$NON-NLS-1$
 			e.printStackTrace();
 		}
 
@@ -260,7 +263,7 @@
 		int size = problemVec.size();
 		LowVisionProblem[] problemArray = new LowVisionProblem[size];
 		for (int i = 0; i < size; i++) {
-			problemArray[i] = (LowVisionProblem) (problemVec.elementAt(i));
+			problemArray[i] = problemVec.elementAt(i);
 		}
 		return (problemArray);
 	}
@@ -281,7 +284,7 @@
 			bgSim = new ColorIRGB(_lvType.convertColor(backgroundColor));
 		} catch (LowVisionException e) {
 			e.printStackTrace();
-			throw new LowVisionException("Could not convert colors.");
+			throw new LowVisionException("Could not convert colors."); //$NON-NLS-1$
 		}
 
 		W3CColorChecker w3c = new W3CColorChecker(fgSim, bgSim);
@@ -299,15 +302,14 @@
 	}
 
 	/*
-	 * fixed size font check experimental result (in IE6) (1)mm,cm,in,pt,pc,px ->
-	 * fixed (2)larger,smaller, xx-small to xx-large -> variable (3)em,ex,% ->
-	 * same with parent (if not specified in ancestor -> variable)
+	 * fixed size font check experimental result (in IE6) (1)mm,cm,in,pt,pc,px
+	 * -> fixed (2)larger,smaller, xx-small to xx-large -> variable (3)em,ex,%
+	 * -> same with parent (if not specified in ancestor -> variable)
 	 * 
 	 * if <BODY> uses "pt" -> consider IE added this configuration
 	 * 
 	 * private static final Pattern regexFontSequence =
 	 * Pattern.compile("^(([^\\/]+\\/)*([^\\/]+))$" );
-	 * 
 	 */
 	private static final short FONT_SIZE_UNKNOWN = 0;
 
@@ -376,7 +378,7 @@
 			StringTokenizer stTag = new StringTokenizer(tagName, DELIM);
 			if (stTag.countTokens() != tokenCount) {
 				throw new LowVisionException(
-						"# of tagNames and fontSizes did not match.");
+						"# of tagNames and fontSizes did not match."); //$NON-NLS-1$
 			}
 			String[] tagNameSequence = new String[tokenCount];
 			for (int i = tokenCount - 1; i >= 0; i--) {
@@ -404,7 +406,7 @@
 				String tmpFont = fontSequence[i];
 				String tmpTag = tagNameSequence[i];
 				// <TD>,<TH> -> same initialization at <BODY>
-				if (tmpTag.equals("td") || tmpTag.equals("th")) {
+				if (tmpTag.equals("td") || tmpTag.equals("th")) { //$NON-NLS-1$ //$NON-NLS-2$
 					firstPtFlag = true;
 					if (curType != FONT_SIZE_PT) {
 						firstPtFlag = false;
@@ -461,6 +463,7 @@
 		}
 	}
 
+	@SuppressWarnings("nls")
 	private short fontSizeType(String _fontSize) {
 		String s = _fontSize.toLowerCase();
 
@@ -481,6 +484,7 @@
 		}
 	}
 
+	@SuppressWarnings("nls")
 	private String digitToFontSetting(String _fontStr)
 			throws LowVisionException {
 
@@ -576,6 +580,7 @@
 	/*
 	 * note: reset at td/th is experimental behaviour in IE6
 	 */
+	@SuppressWarnings("nls")
 	private SmallFontProblem checkSmallFont(LowVisionType _lvType)
 			throws LowVisionException {
 		if (!(_lvType.doBlur())) {
@@ -626,7 +631,7 @@
 		int numFontSizeSettings = fontSequence.size();
 		String[] fontSizeSettings = new String[numFontSizeSettings];
 		for (int i = 0; i < numFontSizeSettings; i++) {
-			String tmpSetting = (String) (fontSequence.elementAt(i));
+			String tmpSetting = fontSequence.elementAt(i);
 			fontSizeSettings[i] = digitToFontSetting(tmpSetting);
 		}
 		fontSequence = null;
@@ -636,7 +641,6 @@
 		 * 
 		 * define LARGEST as default to check the small size font in the LARGEST
 		 * setting
-		 * 
 		 */
 		String curFontSize = fontSizeSettings[numFontSizeSettings - 1];
 		if (fontSizeType(curFontSize) == FONT_SIZE_PT) {
@@ -760,7 +764,7 @@
 		}
 
 		// TODO check link color?
-		if (tagName.startsWith("a/")) {
+		if (tagName.startsWith("a/")) { //$NON-NLS-1$
 			return (null);
 		}
 
@@ -778,8 +782,8 @@
 			} catch (ColorException ce) {
 				ce.printStackTrace();
 				throw new LowVisionException(
-						"ColorException occurs while converting String \""
-								+ curColorString + "\" to a color.");
+						"ColorException occurs while converting String \"" //$NON-NLS-1$
+								+ curColorString + "\" to a color."); //$NON-NLS-1$
 			}
 			if (templateColor.equals(foregroundColor)) {
 				return (null);
@@ -823,8 +827,8 @@
 			} catch (ColorException ce) {
 				ce.printStackTrace();
 				throw new LowVisionException(
-						"ColorException occurs while converting String \""
-								+ curColorString + "\" to a color.");
+						"ColorException occurs while converting String \"" //$NON-NLS-1$
+								+ curColorString + "\" to a color."); //$NON-NLS-1$
 			}
 			if (templateColor.equals(backgroundColor)) {
 				return (null);
diff --git a/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/character/CharacterMS.java b/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/character/CharacterMS.java
index abc48ef..b2db3ce 100644
--- a/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/character/CharacterMS.java
+++ b/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/character/CharacterMS.java
@@ -89,7 +89,7 @@
 			return (getInt2D());
 		}
 		if (_margin < 0) {
-			throw new ImageException("The margin must be non-negative.");
+			throw new ImageException("The margin must be non-negative."); //$NON-NLS-1$
 		}
 		Int2D i2d = new Int2D(cc.getShape().getWidth() + 2 * _margin, cc.getShape().getHeight() + 2
 				* _margin);
diff --git a/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/character/CharacterSM.java b/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/character/CharacterSM.java
index 1407d0c..360bd78 100644
--- a/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/character/CharacterSM.java
+++ b/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/character/CharacterSM.java
@@ -99,7 +99,7 @@
 			return (getInt2D());
 		}
 		if (_margin < 0) {
-			throw new ImageException("The margin must be non-negative.");
+			throw new ImageException("The margin must be non-negative."); //$NON-NLS-1$
 		}
 		int w = cc.getShape().getWidth();
 		int h = cc.getShape().getHeight();
diff --git a/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/checker/CharacterChecker.java b/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/checker/CharacterChecker.java
index 2dc78b8..3603ac3 100644
--- a/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/checker/CharacterChecker.java
+++ b/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/checker/CharacterChecker.java
@@ -190,7 +190,7 @@
 		} catch (Exception e) {
 			// e.printStackTrace();
 			throw new ImageException(
-					"Error occurred while simulating an MSCharacter.");
+					"Error occurred while simulating an MSCharacter."); //$NON-NLS-1$
 		}
 
 		/*
@@ -209,7 +209,7 @@
 						continue;
 					} else {
 						Integer pixelInt = new Integer(pixel);
-						Boolean answerBool = (Boolean) (answerMap.get(pixelInt));
+						Boolean answerBool = answerMap.get(pixelInt);
 						if (answerBool == null) {
 							if (DecisionMaker.distinguishableTextColors(pixel,
 									_bg)) {
@@ -229,7 +229,7 @@
 		} catch (Exception e) {
 			// e.printStackTrace();
 			throw new ImageException(
-					"Error occurred while making binary image.");
+					"Error occurred while making binary image."); //$NON-NLS-1$
 		}
 		int ccLeft = _msc.cc.getLeft() - margin;
 		if (ccLeft < 0)
@@ -282,7 +282,7 @@
 		} catch (Exception e) {
 			// e.printStackTrace();
 			throw new ImageException(
-					"Error occurred while simulating an SMCharacter.");
+					"Error occurred while simulating an SMCharacter."); //$NON-NLS-1$
 		}
 
 		/*
@@ -302,7 +302,7 @@
 						continue;
 					} else {
 						Integer pixelInt = new Integer(pixel);
-						Boolean answerBool = (Boolean) (answerMap.get(pixelInt));
+						Boolean answerBool = (answerMap.get(pixelInt));
 						if (answerBool == null) {
 							if (!(DecisionMaker.distinguishableTextColors(
 									pixel, _fg))) {
@@ -322,7 +322,7 @@
 		} catch (Exception e) {
 			// e.printStackTrace();
 			throw new ImageException(
-					"Error occurred while making binary image.");
+					"Error occurred while making binary image."); //$NON-NLS-1$
 		}
 		int ccLeft = _smc.cc.getLeft() - margin;
 		if (ccLeft < 0)
@@ -370,7 +370,7 @@
 		} catch (Exception e) {
 			// e.printStackTrace();
 			throw new ImageException(
-					"Error occurred while simulating an SSCharacter.");
+					"Error occurred while simulating an SSCharacter."); //$NON-NLS-1$
 		}
 
 		/*
@@ -389,7 +389,7 @@
 						continue;
 					} else {
 						Integer pixelInt = new Integer(pixel);
-						Boolean answerBool = (Boolean) (answerMap.get(pixelInt));
+						Boolean answerBool = (answerMap.get(pixelInt));
 						if (answerBool == null) {
 							if (DecisionMaker.distinguishableTextColors(pixel,
 									_bg)) {
@@ -407,7 +407,7 @@
 		} catch (Exception e) {
 			// e.printStackTrace();
 			throw new ImageException(
-					"Error occurred while making binary image.");
+					"Error occurred while making binary image."); //$NON-NLS-1$
 		}
 		int ccLeft = _ssc.cc.getLeft() - margin;
 		if (ccLeft < 0)
@@ -484,7 +484,7 @@
 						if (data[j][i] == 0) {
 							int simBg = _lvType.convertColor(im[j][i]);
 							Integer bgInt = new Integer(simBg);
-							Boolean bgBool = (Boolean) (map.get(bgInt));
+							Boolean bgBool = (map.get(bgInt));
 							if (bgBool == null) { // first time
 								if (!(DecisionMaker.distinguishableTextColors(
 										simFgColor, simBg))) {
@@ -539,7 +539,7 @@
 			} catch (Exception e) {
 				// e.printStackTrace();
 				throw new ImageException(
-						"An error occurred while checking colors of an SSCharacter.");
+						"An error occurred while checking colors of an SSCharacter."); //$NON-NLS-1$
 			}
 		}
 
@@ -596,7 +596,7 @@
 		} catch (LowVisionProblemException lvpe) {
 			// lvpe.printStackTrace();
 			throw new ImageException(
-					"Error occurred while making problem group.");
+					"Error occurred while making problem group."); //$NON-NLS-1$
 		}
 	}
 
@@ -613,7 +613,7 @@
 		}
 		int groupSize = groupVector.size();
 		if (groupSize <= 0) {
-			throw new ImageException("No instance belongs to the group. id = "
+			throw new ImageException("No instance belongs to the group. id = " //$NON-NLS-1$
 					+ _id);
 		}
 		LowVisionProblemGroup pg = null;
@@ -622,7 +622,7 @@
 		} catch (LowVisionProblemException lvpe) {
 			// lvpe.printStackTrace();
 			throw new ImageException(
-					"LowVisionProblemGroup cannot be constracted.");
+					"LowVisionProblemGroup cannot be constracted."); //$NON-NLS-1$
 		}
 		_resultVec.addElement(pg);
 	}
diff --git a/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/checker/W3CColorChecker.java b/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/checker/W3CColorChecker.java
index 297efa3..c233e57 100644
--- a/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/checker/W3CColorChecker.java
+++ b/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/checker/W3CColorChecker.java
@@ -95,7 +95,7 @@
 	}
 
 	private static double calcY(int _r, int _g, int _b) {
-		return ((double) (_r * 299 + _g * 587 + _b * 114) / 1000.0);
+		return ( (_r * 299 + _g * 587 + _b * 114) / 1000.0);
 	}
 
 	private static double calcSevY(double _diffY) {
@@ -113,7 +113,7 @@
 	private static double calcSevC(int _diffC) {
 		double sevC = 0.0;
 		if (_diffC < THRESHOLD_C) {
-			sevC = -(double) _diffC / (double) THRESHOLD_C + 1.0;
+			sevC = -(double) _diffC / THRESHOLD_C + 1.0;
 		}
 		if (sevC < 0.0)
 			sevC = 0.0;
diff --git a/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/color/ColorCSS.java b/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/color/ColorCSS.java
index 39b76d6..bd9caef 100644
--- a/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/color/ColorCSS.java
+++ b/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/color/ColorCSS.java
@@ -24,6 +24,7 @@
  *  rgb(R%,G%,B%)
  *  pre-defined colors(16) (see ColorUtil.java)
  */
+@SuppressWarnings("nls")
 public class ColorCSS extends ColorIRGB{
 	private static final String DELIM = "/";
 
diff --git a/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/color/ColorIRGB.java b/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/color/ColorIRGB.java
index 53dc07c..287a434 100644
--- a/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/color/ColorIRGB.java
+++ b/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/color/ColorIRGB.java
@@ -16,6 +16,7 @@
 import java.util.regex.Pattern;
 
 // sRGB [0,255]
+@SuppressWarnings("nls")
 public class ColorIRGB {
 	int R;
 
@@ -245,8 +246,7 @@
 	}
 
 	public ColorSRGB toSRGB(boolean _check) throws ColorException {
-		ColorSRGB s = new ColorSRGB((float) R / 255.0f, (float) G / 255.0f,
-				(float) B / 255.0f, _check);
+		ColorSRGB s = new ColorSRGB(R / 255.0f, G / 255.0f, B / 255.0f, _check);
 		// s.setR( (float)R/255.0f, _check );
 		// s.setG( (float)G/255.0f, _check );
 		// s.setB( (float)B/255.0f, _check );
diff --git a/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/color/ColorLAB.java b/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/color/ColorLAB.java
index ef30ae7..c627ce1 100644
--- a/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/color/ColorLAB.java
+++ b/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/color/ColorLAB.java
@@ -56,7 +56,7 @@
 
 	public void setL(float _l) throws ColorException {
 		if (_l < 0.0f || 100.0f < _l) {
-			throw new ColorException("L is out of range: " + _l);
+			throw new ColorException("L is out of range: " + _l); //$NON-NLS-1$
 		}
 		L = _l;
 	}
diff --git a/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/color/ColorSRGB.java b/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/color/ColorSRGB.java
index 07a489b..b0f71fc 100644
--- a/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/color/ColorSRGB.java
+++ b/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/color/ColorSRGB.java
@@ -47,12 +47,12 @@
 	public void setR(float _r, boolean _check) throws ColorException {
 		if (_r < 0.0f) {
 			if (_check)
-				throw new ColorException("Smaller than minimum.");
+				throw new ColorException("Smaller than minimum."); //$NON-NLS-1$
 			else
 				rgb[0] = 0.0f;
 		} else if (1.0f < _r) {
 			if (_check)
-				throw new ColorException("Larger than maximum.");
+				throw new ColorException("Larger than maximum."); //$NON-NLS-1$
 			else
 				rgb[0] = 1.0f;
 		} else
@@ -64,12 +64,12 @@
 	public void setG(float _g, boolean _check) throws ColorException {
 		if (_g < 0.0f) {
 			if (_check)
-				throw new ColorException("Smaller than minimum.");
+				throw new ColorException("Smaller than minimum."); //$NON-NLS-1$
 			else
 				rgb[1] = 0.0f;
 		} else if (1.0f < _g) {
 			if (_check)
-				throw new ColorException("Larger than maximum.");
+				throw new ColorException("Larger than maximum."); //$NON-NLS-1$
 			else
 				rgb[1] = 1.0f;
 		} else
@@ -81,12 +81,12 @@
 	public void setB(float _b, boolean _check) throws ColorException {
 		if (_b < 0.0f) {
 			if (_check)
-				throw new ColorException("Smaller than minimum.");
+				throw new ColorException("Smaller than minimum."); //$NON-NLS-1$
 			else
 				rgb[2] = 0.0f;
 		} else if (1.0f < _b) {
 			if (_check)
-				throw new ColorException("Larger than maximum.");
+				throw new ColorException("Larger than maximum."); //$NON-NLS-1$
 			else
 				rgb[2] = 1.0f;
 		} else
diff --git a/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/color/ColorUtil.java b/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/color/ColorUtil.java
index 5abddca..e3ef942 100644
--- a/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/color/ColorUtil.java
+++ b/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/color/ColorUtil.java
@@ -16,6 +16,7 @@
 
 public class ColorUtil {
 	// pre-defined 16 colors (HTML4.0, XHTML1.0, CSS2)
+	@SuppressWarnings("nls")
 	private static final String predefinedColors[] = {
 		"black", "#000000", "silver", "#c0c0c0",
 		"gray", "#808080", "grey", "#808080", "white", "#ffffff",
diff --git a/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/color/ColorXYZ.java b/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/color/ColorXYZ.java
index 554bc89..4706e5f 100644
--- a/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/color/ColorXYZ.java
+++ b/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/color/ColorXYZ.java
@@ -64,12 +64,12 @@
 	public void setX(float _x, boolean _check) throws ColorException {
 		if (_x < 0.0f) {
 			if (_check)
-				throw new ColorException("Smaller than minimum.");
+				throw new ColorException("Smaller than minimum."); //$NON-NLS-1$
 			else
 				xyz[0] = 0.0f;
 		} else if (1.0f < _x) {
 			if (_check)
-				throw new ColorException("Larger than maximum.");
+				throw new ColorException("Larger than maximum."); //$NON-NLS-1$
 			else
 				xyz[0] = 1.0f;
 		} else
@@ -83,12 +83,12 @@
 	public void setY(float _y, boolean _check) throws ColorException {
 		if (_y < 0.0f) {
 			if (_check)
-				throw new ColorException("Smaller than minimum.");
+				throw new ColorException("Smaller than minimum."); //$NON-NLS-1$
 			else
 				xyz[1] = 0.0f;
 		} else if (1.0f < _y) {
 			if (_check)
-				throw new ColorException("Larger than maximum.");
+				throw new ColorException("Larger than maximum."); //$NON-NLS-1$
 			else
 				xyz[1] = 1.0f;
 		} else
@@ -102,12 +102,12 @@
 	public void setZ(float _z, boolean _check) throws ColorException {
 		if (_z < 0.0f) {
 			if (_check)
-				throw new ColorException("Smaller than minimum.");
+				throw new ColorException("Smaller than minimum."); //$NON-NLS-1$
 			else
 				xyz[2] = 0.0f;
 		} else if (1.0f < _z) {
 			if (_check)
-				throw new ColorException("Larger than maximum.");
+				throw new ColorException("Larger than maximum."); //$NON-NLS-1$
 			else
 				xyz[2] = 1.0f;
 		} else
diff --git a/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/color/ColorYIQ.java b/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/color/ColorYIQ.java
index 1a8d543..479c6d7 100644
--- a/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/color/ColorYIQ.java
+++ b/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/color/ColorYIQ.java
@@ -42,13 +42,13 @@
 
 	private void rangeCheck() throws ColorException {
 		if (Y < 0.0f || 1.0f < Y) {
-			throw new ColorException("Y is out of range: " + Y);
+			throw new ColorException("Y is out of range: " + Y); //$NON-NLS-1$
 		}
 		if (I < 0.0f || 1.0f < I) {
-			throw new ColorException("I is out of range: " + I);
+			throw new ColorException("I is out of range: " + I); //$NON-NLS-1$
 		}
 		if (Q < 0.0f || 1.0f < Q) {
-			throw new ColorException("Q is out of range: " + Q);
+			throw new ColorException("Q is out of range: " + Q); //$NON-NLS-1$
 		}
 	}
 
diff --git a/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/color/ColorYXY.java b/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/color/ColorYXY.java
index e6b5a41..a3c4f73 100644
--- a/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/color/ColorYXY.java
+++ b/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/color/ColorYXY.java
@@ -53,12 +53,12 @@
 	public void setYY(float _yy, boolean _check) throws ColorException {
 		if (_yy < 0.0f) {
 			if (_check)
-				throw new ColorException("Smaller than minimum.");
+				throw new ColorException("Smaller than minimum."); //$NON-NLS-1$
 			else
 				YY = 0.0f;
 		} else if (1.0f < _yy) {
 			if (_check)
-				throw new ColorException("Larger than maximum.");
+				throw new ColorException("Larger than maximum."); //$NON-NLS-1$
 			else
 				YY = 1.0f;
 		} else
@@ -72,12 +72,12 @@
 	public void setX(float _x, boolean _check) throws ColorException {
 		if (_x < 0.0f) {
 			if (_check)
-				throw new ColorException("Smaller than minimum.");
+				throw new ColorException("Smaller than minimum."); //$NON-NLS-1$
 			else
 				x = 0.0f;
 		} else if (1.0f < _x) {
 			if (_check)
-				throw new ColorException("Larger than maximum.");
+				throw new ColorException("Larger than maximum."); //$NON-NLS-1$
 			else
 				x = 1.0f;
 		} else
@@ -91,12 +91,12 @@
 	public void setY(float _y, boolean _check) throws ColorException {
 		if (_y < 0.0f) {
 			if (_check)
-				throw new ColorException("Smaller than minimum.");
+				throw new ColorException("Smaller than minimum."); //$NON-NLS-1$
 			else
 				y = 0.0f;
 		} else if (1.0f < _y) {
 			if (_check)
-				throw new ColorException("Larger than maximum.");
+				throw new ColorException("Larger than maximum."); //$NON-NLS-1$
 			else
 				y = 1.0f;
 		} else
diff --git a/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/image/BinaryImage.java b/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/image/BinaryImage.java
index 5d84e39..380629f 100644
--- a/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/image/BinaryImage.java
+++ b/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/image/BinaryImage.java
@@ -194,6 +194,7 @@
 	 * 
 	 * protrusion -strict -> error -not strict -> clip
 	 */
+	@SuppressWarnings("nls")
 	public BinaryImage offsetCopy(int _newWidth, int _newHeight, int _offsetX,
 			int _offsetY, boolean _strict) throws ImageException {
 		BinaryImage bi = new BinaryImage(_newWidth, _newHeight);
@@ -335,7 +336,7 @@
 		if (size > 0) {
 			Coord[] coArray = new Coord[size];
 			for (int i = 0; i < size; i++) {
-				coArray[i] = (Coord) (tmpVec.elementAt(i));
+				coArray[i] = tmpVec.elementAt(i);
 			}
 			return (coArray);
 		} else {
@@ -369,7 +370,7 @@
 		int height = _bi1.height;
 		if (width != _bi2.width || height != _bi2.height) {
 			throw new ImageException(
-					"subtract(): Sizes of the two image must be the same");
+					"subtract(): Sizes of the two image must be the same"); //$NON-NLS-1$
 		}
 
 		BinaryImage newImage = new BinaryImage(width, height);
@@ -448,7 +449,7 @@
 			return (null);
 		if (horSeg.isVertical() || horSeg.isDiagonal())
 			throw new ImageException(
-					"Endpoints cannot be successfully detected");
+					"Endpoints cannot be successfully detected"); //$NON-NLS-1$
 		BinaryImage bi = new BinaryImage(width, height);
 		Coord left = horSeg.getLeftPoint();
 		Coord right = horSeg.getRightPoint();
@@ -466,7 +467,7 @@
 			return (null);
 		if (horSeg.isVertical() || horSeg.isDiagonal())
 			throw new ImageException(
-					"Endpoints cannot be successfully detected");
+					"Endpoints cannot be successfully detected"); //$NON-NLS-1$
 		BinaryImage bi = new BinaryImage(width, height);
 		Coord left = horSeg.getLeftPoint();
 		Coord right = horSeg.getRightPoint();
@@ -483,7 +484,7 @@
 			}
 			if (horSeg2.isVertical() || horSeg2.isDiagonal())
 				throw new ImageException(
-						"Endpoints cannot be successfully detected");
+						"Endpoints cannot be successfully detected"); //$NON-NLS-1$
 			Coord left2 = horSeg.getLeftPoint();
 			Coord right2 = horSeg.getRightPoint();
 			if ((left2.y == maxHeight) && (left2.x == curX0)
@@ -509,6 +510,7 @@
 		dump(pw);
 	}
 
+	@SuppressWarnings("nls")
 	public void dump(PrintWriter _pw) {
 		_pw.println("-------------------------------");
 		_pw.println("Dumping a BinaryImage");
@@ -532,6 +534,7 @@
 		dump(pw, _left, _top, _width, _height);
 	}
 
+	@SuppressWarnings("nls")
 	public void dump(PrintWriter _pw, int _left, int _top, int _width,
 			int _height) {
 		_pw.println("-------------------------------");
diff --git a/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/image/ColorHistogram.java b/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/image/ColorHistogram.java
index df87724..2923345 100644
--- a/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/image/ColorHistogram.java
+++ b/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/image/ColorHistogram.java
@@ -17,8 +17,6 @@
 import java.util.Comparator;
 import java.util.HashMap;
 
-
-
 public class ColorHistogram {
 	private HashMap<Integer, ColorHistogramBin> pixelMap = new HashMap<Integer, ColorHistogramBin>();
 
@@ -42,8 +40,7 @@
 	public void put(int _color) {
 		changedFlag = true;
 		Integer curPixel = new Integer(_color);
-		ColorHistogramBin curHistBin = (ColorHistogramBin) (pixelMap
-				.get(curPixel));
+		ColorHistogramBin curHistBin = pixelMap.get(curPixel);
 		if (curHistBin != null) {
 			curHistBin.occurrence++;
 		} else {
@@ -66,19 +63,18 @@
 		sortedArrayByOccurrence = new ColorHistogramBin[len];
 
 		for (int i = 0; i < len; i++) {
-			sortedArrayByOccurrence[i] = (ColorHistogramBin) (pixelMap
-					.get(keyArray[i]));
+			sortedArrayByOccurrence[i] = pixelMap.get(keyArray[i]);
 		}
 		Arrays.sort(sortedArrayByOccurrence, new ComparatorByOccurrence());
 	}
 
-	public class ComparatorByOccurrence implements Comparator<ColorHistogramBin> {
+	public class ComparatorByOccurrence implements
+			Comparator<ColorHistogramBin> {
 		public int compare(ColorHistogramBin o1, ColorHistogramBin o2) {
-			return(o2.occurrence-o1.occurrence);
+			return (o2.occurrence - o1.occurrence);
 		}
 	}
 
-
 	public static ColorHistogram makeColorHistogram(int[][] _pixel, int _width,
 			int _height) {
 		ColorHistogram histo = new ColorHistogram();
@@ -92,7 +88,8 @@
 	}
 
 	public static ColorHistogram makeColorHistogram(IInt2D _i2d) {
-		return (makeColorHistogram(_i2d.getData(), _i2d.getWidth(), _i2d.getHeight()));
+		return (makeColorHistogram(_i2d.getData(), _i2d.getWidth(), _i2d
+				.getHeight()));
 	}
 
 	public void dump(PrintStream _ps) {
@@ -100,6 +97,7 @@
 		dump(pw);
 	}
 
+	@SuppressWarnings("nls")
 	public void dump(PrintWriter _pw) {
 		if (changedFlag)
 			makeSortedArrayByOccurrence();
diff --git a/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/image/ConnectedComponent.java b/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/image/ConnectedComponent.java
index 0d3c876..903feea 100644
--- a/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/image/ConnectedComponent.java
+++ b/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/image/ConnectedComponent.java
@@ -152,7 +152,7 @@
 	}
 
 	public double getDensity() {
-		return ((double) count / ((double) (shape.width) * (double) (shape.height)));
+		return (count / ((double) (shape.width) * (double) (shape.height)));
 	}
 
 	// adjust shape size (for removal of underline of link, etc.)
@@ -167,7 +167,7 @@
 	public ConnectedComponent calcContour() throws ImageException {
 		if (connectivity == CONNECTIVITY_UNSET) {
 			throw new ImageException(
-					"Information on connectivity is needed to calculate genus");
+					"Information on connectivity is needed to calculate genus"); //$NON-NLS-1$
 		}
 
 		int width = shape.width;
@@ -214,7 +214,7 @@
 				}
 			}
 		} else {
-			throw new ImageException("Unknown connectivity");
+			throw new ImageException("Unknown connectivity"); //$NON-NLS-1$
 		}
 
 		ConnectedComponent cc = new ConnectedComponent(left, top, bi,
@@ -231,7 +231,7 @@
 			return (thinningHilditch());
 		} else {
 			// TBD
-			throw new ImageException("Unknown thinning method: " + _method);
+			throw new ImageException("Unknown thinning method: " + _method); //$NON-NLS-1$
 		}
 	}
 
@@ -348,7 +348,7 @@
 		int numVertex = vertexVector.size();
 		Coord[] vertexArray = new Coord[numVertex];
 		for (int i = 0; i < numVertex; i++) {
-			vertexArray[i] = (Coord) (vertexVector.elementAt(i));
+			vertexArray[i] = vertexVector.elementAt(i);
 		}
 
 		// // debug(from here)
@@ -367,11 +367,11 @@
 	private Coord nextConvexHullVertex(Coord[] _all, Coord _origin,
 			Coord _vector) throws ImageException {
 		if (_all == null) {
-			throw new ImageException("Empty vertex set.");
+			throw new ImageException("Empty vertex set."); //$NON-NLS-1$
 		}
 		int len = _all.length;
 		if (len == 0) {
-			throw new ImageException("No vertex");
+			throw new ImageException("No vertex"); //$NON-NLS-1$
 		}
 
 		Coord answer = new Coord(-1, -1);
@@ -413,7 +413,7 @@
 	public int calcGenus() throws ImageException {
 		if (connectivity == CONNECTIVITY_UNSET) {
 			throw new ImageException(
-					"Information on connectivity is needed to calculate genus");
+					"Information on connectivity is needed to calculate genus"); //$NON-NLS-1$
 		}
 
 		int width = shape.width;
@@ -496,7 +496,7 @@
 					e++;
 			return (v - e - d + t - f);
 		} else {
-			throw new ImageException("Unknown connectivity");
+			throw new ImageException("Unknown connectivity"); //$NON-NLS-1$
 		}
 	}
 	
@@ -505,6 +505,7 @@
 		dump(pw);
 	}
 
+	@SuppressWarnings("nls")
 	public void dump(PrintWriter _pw) {
 		_pw.println("-------------------------------");
 		_pw.println("Dumping a ConnectedComponent");
@@ -529,6 +530,7 @@
 		dump(pw, _left, _top, _width, _height);
 	}
 
+	@SuppressWarnings("nls")
 	public void dump(PrintWriter _pw, int _left, int _top, int _width,
 			int _height) {
 		_pw.println("-------------------------------");
diff --git a/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/image/Coord.java b/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/image/Coord.java
index 287e6ec..6ecfc9c 100644
--- a/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/image/Coord.java
+++ b/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/image/Coord.java
@@ -96,11 +96,11 @@
 	}
 
 	public static double distance(Coord _a, Coord _b) {
-		return (Math.sqrt((double) distancePow2(_a, _b)));
+		return (Math.sqrt(distancePow2(_a, _b)));
 	}
 
 	public static double distance(Coord _a) {
-		return (Math.sqrt((double) distancePow2(_a)));
+		return (Math.sqrt(distancePow2(_a)));
 	}
 
 	public static boolean isOnLine(Coord _start, Coord _end, Coord _point) {
@@ -136,9 +136,9 @@
 
 	public static double cosine(Coord _a, Coord _b) throws ImageException {
 		if (_a.isOrigin() || _b.isOrigin()) {
-			throw new ImageException("Cannot calculate cosine of zero-vectors");
+			throw new ImageException("Cannot calculate cosine of zero-vectors"); //$NON-NLS-1$
 		}
-		return ((double) innerProduct(_a, _b) / (distance(_a) * distance(_b)));
+		return (innerProduct(_a, _b) / (distance(_a) * distance(_b)));
 	}
 
 	public static int outerProduct(Coord _a, Coord _b) {
@@ -154,6 +154,7 @@
 		dump(pw);
 	}
 
+	@SuppressWarnings("nls")
 	public void dump(PrintWriter _pw) {
 		_pw.println("-------------------------------");
 		_pw.println("Dumping a point");
@@ -166,6 +167,7 @@
 		dump(pw, _points);
 	}
 
+	@SuppressWarnings("nls")
 	public static void dump(PrintWriter _pw, Coord[] _points) {
 		int numPoints = _points.length;
 		_pw.println("-------------------------------");
diff --git a/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/image/ImageUtil.java b/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/image/ImageUtil.java
index 1e44c88..98c92a9 100644
--- a/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/image/ImageUtil.java
+++ b/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/image/ImageUtil.java
@@ -22,7 +22,7 @@
 	public static Int2D bufferedImageToInt2D(BufferedImage _bi)
 			throws ImageException {
 		if (_bi == null) {
-			throw new ImageException("Input BufferedImage is null.");
+			throw new ImageException("Input BufferedImage is null."); //$NON-NLS-1$
 		}
 		int width = _bi.getWidth();
 		int height = _bi.getHeight();
@@ -95,6 +95,7 @@
 		dumpInt2DArray(pw, _data, _width, _height);
 	}
 
+	@SuppressWarnings("nls")
 	public static void dumpInt2DArray(PrintWriter _pw, int[][] _data,
 			int _width, int _height) {
 		_pw.println("-------");
diff --git a/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/image/Int2D.java b/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/image/Int2D.java
index 3a71a22..cc9d8fb 100644
--- a/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/image/Int2D.java
+++ b/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/image/Int2D.java
@@ -40,7 +40,7 @@
 	public Int2D(int _w, int _h, int[][] _array) throws ImageException {
 		this(_w, _h);
 		if (_array.length < _h || _array[0].length < _w) {
-			throw new ImageException("Out of range");
+			throw new ImageException("Out of range"); //$NON-NLS-1$
 		}
 		for (int j = 0; j < getHeight(); j++) {
 			for (int i = 0; i < getWidth(); i++) {
@@ -138,7 +138,7 @@
 	 */
 	public Int2D cutMargin(int _m) throws ImageException {
 		if (getWidth() <= 2 * _m || getHeight() <= 2 * _m) {
-			throw new ImageException("The margin is too wide.");
+			throw new ImageException("The margin is too wide."); //$NON-NLS-1$
 		}
 		int newW = getWidth() - 2 * _m;
 		int newH = getHeight() - 2 * _m;
diff --git a/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/image/InteriorImage.java b/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/image/InteriorImage.java
index 703a6c6..c3c3a7a 100644
--- a/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/image/InteriorImage.java
+++ b/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/image/InteriorImage.java
@@ -118,6 +118,7 @@
 		return (pixel.getHeight());
 	}
 
+	@SuppressWarnings("nls")
 	public String dumpLargeComponents() {
 		if (numLargeComponents == 0) {
 			return ("There are no large components.");
@@ -187,8 +188,7 @@
 		if (numLargeComponents > 0) {
 			largeComponents = new InteriorImageComponent[numLargeComponents];
 			for (int k = 0; k < numLargeComponents; k++) {
-				largeComponents[k] = (InteriorImageComponent) (largeComponentVector
-						.elementAt(k));
+				largeComponents[k] = largeComponentVector.elementAt(k);
 			}
 			largeComponentVector.removeAllElements();
 		}
@@ -251,7 +251,7 @@
 		} catch (Exception e) {
 			// e.printStackTrace();
 			throw new ImageException(
-					"Exception occurred while checking colors.");
+					"Exception occurred while checking colors."); //$NON-NLS-1$
 		}
 
 		// (A) assume ImageProblem only
@@ -263,7 +263,7 @@
 			} catch (LowVisionProblemException lvpe) {
 				// lvpe.printStackTrace();
 				throw new ImageException(
-						"Error occurred while making an instance of LowVisionProblemGroup.");
+						"Error occurred while making an instance of LowVisionProblemGroup."); //$NON-NLS-1$
 			}
 			LowVisionProblemGroup[] groupArray = new LowVisionProblemGroup[1];
 			groupArray[0] = group;
@@ -321,11 +321,11 @@
 			} catch (LowVisionProblemException lvpe) {
 				// lvpe.printStackTrace();
 				throw new ImageException(
-						"Error occurred while making an instance of LowVisionProblemGroup.");
+						"Error occurred while making an instance of LowVisionProblemGroup."); //$NON-NLS-1$
 			}
-			if (curGroup != null) {
-				answerVec.addElement(curGroup);
-			}
+			// if (curGroup != null) {
+			answerVec.addElement(curGroup);
+			// }
 			curSize = _vec.size();
 		}
 		return (answerVec);
@@ -353,7 +353,7 @@
 		} catch (LowVisionException lve) {
 			// lve.printStackTrace();
 			throw new ImageException(
-					"Exception occurred while simulating an interiorImage");
+					"Exception occurred while simulating an interiorImage"); //$NON-NLS-1$
 		}
 	}
 }
diff --git a/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/image/InteriorImageComponent.java b/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/image/InteriorImageComponent.java
index 0c07de3..0433c0b 100644
--- a/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/image/InteriorImageComponent.java
+++ b/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/image/InteriorImageComponent.java
@@ -36,7 +36,7 @@
 		if (numConnectedComponents > 0) {
 			connectedComponents = new ConnectedComponent[numConnectedComponents];
 			for (int k = 0; k < numConnectedComponents; k++) {
-				ConnectedComponent cc = (ConnectedComponent) (_vec.elementAt(k));
+				ConnectedComponent cc = _vec.elementAt(k);
 				count += cc.getCount();
 				connectedComponents[k] = cc;
 			}
@@ -64,8 +64,8 @@
 	public ConnectedComponent getConnectedComponent(int _index)
 			throws ImageException {
 		if (_index < 0 || numConnectedComponents <= _index) {
-			throw new ImageException("Out of range: specified index = "
-					+ _index + ", while #ConnectedComponent = "
+			throw new ImageException("Out of range: specified index = " //$NON-NLS-1$
+					+ _index + ", while #ConnectedComponent = " //$NON-NLS-1$
 					+ numConnectedComponents);
 		}
 		return (connectedComponents[_index]);
diff --git a/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/image/LabeledImage.java b/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/image/LabeledImage.java
index f57d0a8..34e5e7f 100644
--- a/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/image/LabeledImage.java
+++ b/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/image/LabeledImage.java
@@ -100,7 +100,7 @@
 		else if (method == METHOD_4_CONNECTIVITY)
 			conn = ConnectedComponent.CONNECTIVITY_4;
 		for (int i = 0; i < numComponents; i++) {
-			components[i] = (ConnectedComponent) (ccVector.elementAt(i));
+			components[i] = ccVector.elementAt(i);
 			components[i].connectivity = conn;
 		}
 	}
@@ -120,7 +120,7 @@
 		labelingStack.push(startCoord);
 
 		while (!labelingStack.empty()) {
-			Coord co = (Coord) (labelingStack.pop());
+			Coord co = labelingStack.pop();
 			int i = co.x;
 			int j = co.y;
 
@@ -256,7 +256,7 @@
 	 */
 	public BufferedImage toBufferedImage() throws ImageException {
 		if ((numComponents >> 24) != 0) {
-			throw new ImageException("Too many labels to make bufferedImage.");
+			throw new ImageException("Too many labels to make bufferedImage."); //$NON-NLS-1$
 		}
 
 		BufferedImage destImage = new BufferedImage(width, height,
@@ -295,6 +295,7 @@
 		dumpLabel(pw);
 	}
 
+	@SuppressWarnings("nls")
 	public void dumpLabel(PrintWriter _pw) {
 		_pw.println("-------------------------------");
 		_pw.println("Dumping a labeledImage");
@@ -317,6 +318,7 @@
 		dumpComponents(pw);
 	}
 
+	@SuppressWarnings("nls")
 	public void dumpComponents(PrintWriter _pw) {
 		_pw.println("-------------------------------");
 		_pw.println("Dumping components");
@@ -332,6 +334,7 @@
 		dumpComponents(pw, _i);
 	}
 
+	@SuppressWarnings("nls")
 	public void dumpComponents(PrintWriter _pw, int _i) {
 		_pw.println("-----");
 		_pw.println("Components # = " + _i);
diff --git a/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/image/LineSegment.java b/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/image/LineSegment.java
index 86490c6..e8afde8 100644
--- a/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/image/LineSegment.java
+++ b/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/image/LineSegment.java
@@ -111,13 +111,13 @@
 		int xDiff = x1-x0+1;
 		int yDiff = y1-y0+1;
 		if( x0 == x1 ){
-			return( (double)(Math.abs(yDiff)) );
+			return( (Math.abs(yDiff)) );
 		}
 		else if( y0 == y1 ){
-			return( (double)(Math.abs(xDiff)) );
+			return( (Math.abs(xDiff)) );
 		}
 		else{
-			return( Math.sqrt((double)(xDiff*xDiff + yDiff*yDiff)) );
+			return( Math.sqrt((xDiff*xDiff + yDiff*yDiff)) );
 		}
 	}
 }
diff --git a/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/image/PageImage.java b/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/image/PageImage.java
index dfb900d..1bc926e 100644
--- a/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/image/PageImage.java
+++ b/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/image/PageImage.java
@@ -40,6 +40,7 @@
  * 
  */
 public class PageImage implements IPageImage {
+	private static final String NULL_STRING = ""; //$NON-NLS-1$
 	public static final boolean DO_CHECK_CHARACTERS = false;
 	public static final boolean DO_CHECK_IMAGES = true;
 
@@ -281,7 +282,7 @@
 		if (size > 0) {
 			interiorImageArray = new InteriorImage[size];
 			for (int k = 0; k < size; k++) {
-				interiorImageArray[k] = (InteriorImage) (imageVector
+				interiorImageArray[k] = (imageVector
 						.elementAt(k));
 			}
 		}
@@ -358,7 +359,7 @@
 				} else if (type == PageComponent.OTHER_TYPE) {
 					;
 				} else {
-					throw new ImageException("Unexpected type = " + type);
+					throw new ImageException("Unexpected type = " + type); //$NON-NLS-1$
 				}
 			}
 		}
@@ -373,7 +374,7 @@
 		 */
 		int numCandChar = candidateCharacterVector.size();
 		for (int k = numCandChar - 1; k >= 0; k--) {
-			CandidateCharacter cChar = (CandidateCharacter) (candidateCharacterVector
+			CandidateCharacter cChar = (candidateCharacterVector
 					.elementAt(k));
 			int w = cChar.cc.shape.width;
 			int i = 0;
@@ -429,7 +430,7 @@
 		this.numNonContainedCharacters = tmpSMCharacterVector.size();
 		this.nonContainedCharacters = new CharacterSM[numNonContainedCharacters];
 		for (int k = 0; k < numNonContainedCharacters; k++) {
-			nonContainedCharacters[k] = (CharacterSM) (tmpSMCharacterVector
+			nonContainedCharacters[k] = (tmpSMCharacterVector
 					.elementAt(k));
 		}
 		tmpSMCharacterVector.removeAllElements();
@@ -476,7 +477,7 @@
 					} catch (Exception e) {
 						// e.printStackTrace();
 						throw new ImageException(
-								"An error occurred while making contBin.");
+								"An error occurred while making contBin."); //$NON-NLS-1$
 					}
 
 					if (containerMap[j + contY][i + contX] == k + 1) {
@@ -574,7 +575,7 @@
 			 */
 			int msVecSize = curCont.msCharacterVector.size();
 			for (int l = msVecSize - 1; l >= 0; l--) {
-				CharacterMS curMS = (CharacterMS) (curCont.msCharacterVector
+				CharacterMS curMS = (curCont.msCharacterVector
 						.elementAt(l));
 				if (DecisionMaker.isTooSmallThinedMSCharacter(curMS)) {
 					curCont.msCharacterVector.removeElementAt(l);
@@ -587,7 +588,7 @@
 
 			int tmptmpVecSize = tmpVec.size();
 			for (int l = tmptmpVecSize - 1; l >= 0; l--) {
-				CharacterSM tmpSM = (CharacterSM) (tmpVec.elementAt(l));
+				CharacterSM tmpSM = (tmpVec.elementAt(l));
 				if (!(DecisionMaker.isSMCharacter(tmpSM))) {
 					tmpVec.removeElementAt(l);
 				}
@@ -596,7 +597,7 @@
 			curCont.numSMCharacters = tmpVec.size();
 			curCont.smCharacters = new CharacterSM[curCont.numSMCharacters];
 			for (int l = 0; l < curCont.numSMCharacters; l++) {
-				curCont.smCharacters[l] = (CharacterSM) (tmpVec.elementAt(l));
+				curCont.smCharacters[l] = (tmpVec.elementAt(l));
 			}
 			tmpVec.removeAllElements();
 			tmpVec = null;
@@ -645,8 +646,9 @@
 		}
 	}
 
+	@SuppressWarnings("nls")
 	private void fillOneContainer(int _id) throws ImageException {
-		Container curCont = (Container) (containerVector.elementAt(_id - 1));
+		Container curCont = (containerVector.elementAt(_id - 1));
 		int curX0 = curCont.cc.left;
 		int curY0 = curCont.cc.top;
 		int curX1 = curX0 + curCont.cc.shape.width;
@@ -711,14 +713,14 @@
 						DebugUtil.outMsg(this, "i = " + i + ", j = " + j);
 						DebugUtil.outMsg(this, "Dumping containerMap");
 						for (int k = 0; k < pixel.getWidth(); k++) {
-							System.err.print("" + containerMap[j][k]);
+							System.err.print(NULL_STRING + containerMap[j][k]);
 						}
-						System.err.println("");
+						System.err.println(NULL_STRING);
 						DebugUtil.outMsg(this, "Dumping workMap");
 						for (int k = 0; k < pixel.getWidth(); k++) {
-							System.err.print("" + workMap[j][k]);
+							System.err.print(NULL_STRING + workMap[j][k]);
 						}
-						System.err.println("");
+						System.err.println(NULL_STRING);
 						throw new ImageException("filling error 0: id = " + _id);
 					}
 					containerMap[j][i] = _id;
@@ -843,7 +845,7 @@
 	// target SM Char is contained within MS Char in the Container?
 	private CharacterMS includingMSCharacter(CharacterSM _smc, Container _cont) {
 		for (int k = 0; k < _cont.msCharacterVector.size(); k++) {
-			CharacterMS curMS = (CharacterMS) (_cont.msCharacterVector
+			CharacterMS curMS = (_cont.msCharacterVector
 					.elementAt(k));
 			if (_smc.cc.isIncludedBy(curMS.cc)) {
 				return (curMS);
diff --git a/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/image/PageImageDebugUtil.java b/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/image/PageImageDebugUtil.java
index faeac2b..262d542 100644
--- a/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/image/PageImageDebugUtil.java
+++ b/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/image/PageImageDebugUtil.java
@@ -17,8 +17,8 @@
 
 public class PageImageDebugUtil {
 	private PageImage pageImage;
-	
-	PageImageDebugUtil(PageImage pageImage){
+
+	PageImageDebugUtil(PageImage pageImage) {
 		this.pageImage = pageImage;
 	}
 
@@ -40,11 +40,11 @@
 
 	public int[][] paintContainers(int[][] _image, int _color) {
 		if (pageImage.numContainers == 0) {
-			DebugUtil.errMsg(this, "There are no containers.");
+			DebugUtil.errMsg(this, "There are no containers."); //$NON-NLS-1$
 			return (null);
 		}
-		DebugUtil.debugMsg(null, "# of containers = " + pageImage.numContainers,
-				"CONTAINER");
+		DebugUtil.debugMsg(null,
+				"# of containers = " + pageImage.numContainers, "CONTAINER"); //$NON-NLS-1$ //$NON-NLS-2$
 		for (int i = 0; i < pageImage.numContainers; i++) {
 			Container curContainer = pageImage.containers[i];
 			paintOnePageComponent(curContainer, _image, _color);
@@ -54,7 +54,8 @@
 	}
 
 	public IInt2D showRepaintedContainerMap() {
-		Int2D i2d = new Int2D(pageImage.pixel.getWidth(), pageImage.pixel.getHeight());
+		Int2D i2d = new Int2D(pageImage.pixel.getWidth(), pageImage.pixel
+				.getHeight());
 		for (int j = 0; j < pageImage.pixel.getHeight(); j++) {
 			for (int i = 0; i < pageImage.pixel.getWidth(); i++) {
 				i2d.getData()[j][i] = ColorUtil
@@ -69,7 +70,8 @@
 	}
 
 	public IInt2D showAllSSCharacters(int _color) {
-		Int2D i2d = new Int2D(pageImage.pixel.getWidth(), pageImage.pixel.getHeight());
+		Int2D i2d = new Int2D(pageImage.pixel.getWidth(), pageImage.pixel
+				.getHeight());
 		for (int k = 0; k < pageImage.containerVector.size(); k++) {
 			i2d = showSSCharactersInOneContainer(i2d, k, _color);
 		}
@@ -79,10 +81,9 @@
 
 	public Int2D showSSCharactersInOneContainer(Int2D _i2d, int _contIndex,
 			int _color) {
-		Container curCont = (Container) (pageImage.containerVector.elementAt(_contIndex));
+		Container curCont = (pageImage.containerVector.elementAt(_contIndex));
 		for (int l = 0; l < curCont.ssCharacterVector.size(); l++) {
-			CharacterSS ssc = (CharacterSS) (curCont.ssCharacterVector
-					.elementAt(l));
+			CharacterSS ssc = (curCont.ssCharacterVector.elementAt(l));
 			ConnectedComponent cc = ssc.cc;
 			for (int j = 0; j < cc.shape.height; j++) {
 				for (int i = 0; i < cc.shape.width; i++) {
@@ -102,9 +103,10 @@
 
 	public IInt2D showAllCharacters(int _ssColor, int _msColor, int _smColor1,
 			int _smColor2) {
-		Int2D i2d = new Int2D(pageImage.pixel.getWidth(), pageImage.pixel.getHeight());
-		DebugUtil.debugMsg(this, "numContainers = " + pageImage.numContainers,
-				"CONTAINER");
+		Int2D i2d = new Int2D(pageImage.pixel.getWidth(), pageImage.pixel
+				.getHeight());
+		DebugUtil.debugMsg(this, "numContainers = " + pageImage.numContainers, //$NON-NLS-1$
+				"CONTAINER"); //$NON-NLS-1$
 		for (int k = 0; k < pageImage.numContainers; k++) {
 			Container cont = pageImage.containers[k];
 			i2d = showCharactersInOneContainer(i2d, cont, _ssColor, _msColor,
@@ -112,7 +114,8 @@
 		}
 
 		for (int k = 0; k < pageImage.numNonContainedCharacters; k++) {
-			i2d = pageImage.nonContainedCharacters[k].cc.drawShape(i2d, _smColor2);
+			i2d = pageImage.nonContainedCharacters[k].cc.drawShape(i2d,
+					_smColor2);
 		}
 
 		return (i2d);
@@ -139,9 +142,10 @@
 
 	public IInt2D showAllThinedCharacters(int _ssColor, int _msColor,
 			int _smColor1, int _smColor2) throws ImageException {
-		Int2D i2d = new Int2D(pageImage.pixel.getWidth(), pageImage.pixel.getHeight());
-		DebugUtil.debugMsg(this, "numContainers = " + pageImage.numContainers,
-				"CONTAINER");
+		Int2D i2d = new Int2D(pageImage.pixel.getWidth(), pageImage.pixel
+				.getHeight());
+		DebugUtil.debugMsg(this, "numContainers = " + pageImage.numContainers, //$NON-NLS-1$
+				"CONTAINER"); //$NON-NLS-1$
 		for (int k = 0; k < pageImage.numContainers; k++) {
 			Container cont = pageImage.containers[k];
 			i2d = showThinedCharactersInOneContainer(i2d, cont, _ssColor,
@@ -149,8 +153,8 @@
 		}
 
 		for (int k = 0; k < pageImage.numNonContainedCharacters; k++) {
-			i2d = pageImage.nonContainedCharacters[k].cc.thinning().drawShape(i2d,
-					_smColor2);
+			i2d = pageImage.nonContainedCharacters[k].cc.thinning().drawShape(
+					i2d, _smColor2);
 		}
 
 		return (i2d);
diff --git a/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/image/SimulatedPageImage.java b/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/image/SimulatedPageImage.java
index da7a31b..df598fe 100644
--- a/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/image/SimulatedPageImage.java
+++ b/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/image/SimulatedPageImage.java
@@ -40,7 +40,7 @@
 		} catch (LowVisionException lve) {
 			// lve.printStackTrace();
 			throw new ImageException(
-					"The original PageImage cannot be filtered.");
+					"The original PageImage cannot be filtered."); //$NON-NLS-1$
 		}
 		init(bi);
 		bi = null;
diff --git a/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/image/Topology.java b/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/image/Topology.java
index 48409e0..8fc23e3 100644
--- a/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/image/Topology.java
+++ b/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/image/Topology.java
@@ -107,7 +107,7 @@
 		boolean existTop = false;
 		boolean existBottom = false;
 		for( int i=0; i<numNodes; i++ ){
-		    Node n = (Node)(tmpNodes.elementAt(i));
+		    Node n = (tmpNodes.elementAt(i));
 		    if( n.y == topPosition )
 				existTop = true;
 		    if( n.y == bottomPosition )
@@ -127,7 +127,7 @@
 						break;
 				    }
 				    else{
-						throw new ImageException( "Unknown type" );
+						throw new ImageException( "Unknown type" ); //$NON-NLS-1$
 				    }
 				}
 		    }
@@ -144,7 +144,7 @@
 						break;
 				    }
 				    else{
-						throw new ImageException( "Unknown type" );
+						throw new ImageException( "Unknown type" ); //$NON-NLS-1$
 				    }
 				}
 		    }
@@ -157,7 +157,7 @@
 		    offset = 1;
 		}
 		for( int i=0; i<tmpNodes.size(); i++ )
-		    nodes[i+offset] = (Node)(tmpNodes.elementAt(i));
+		    nodes[i+offset] = (tmpNodes.elementAt(i));
 		if( bottomNode != null )
 		    nodes[numNodes-1] = bottomNode;
 	
@@ -208,7 +208,7 @@
 		    nextNodes = new Vector<Coord>();
 	
 		    for( int i=0; i<size; i++ ){
-				Coord co = (Coord)(currentNodes.elementAt(i));
+				Coord co = (currentNodes.elementAt(i));
 				int x = co.x;
 				int y = co.y;
 				if( x>0 && bi.data[y][x-1] != 0 ){ 
@@ -294,6 +294,7 @@
 		showNodes(pw);
 	}
 
+	@SuppressWarnings("nls")
 	public void showNodes(PrintWriter _pw) {
 		_pw.println("-------------------------------");
 		_pw.println("Dumping nodes");
@@ -333,6 +334,7 @@
 		showDistances(pw);
 	}
 
+	@SuppressWarnings("nls")
 	public void showDistances(PrintWriter _pw) {
 		if (distance == null) {
 			return;
@@ -362,6 +364,7 @@
 		_pw.println("-------------------------------");
 	}
 
+	@SuppressWarnings("nls")
 	private String numberFormat4(int _i) {
 		if (0 <= _i && _i <= 9)
 			return ("   " + _i);
diff --git a/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/image/Vector3D.java b/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/image/Vector3D.java
index f326c2c..e1fe6b3 100644
--- a/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/image/Vector3D.java
+++ b/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/image/Vector3D.java
@@ -85,7 +85,7 @@
 
 	public static double cosine(Vector3D _a, Vector3D _b) throws ImageException {
 		if (isZeroVector(_a) || isZeroVector(_b)) {
-			throw new ImageException("Cannot calculate cosine of zero-vectors");
+			throw new ImageException("Cannot calculate cosine of zero-vectors"); //$NON-NLS-1$
 		}
 		double answer = innerProduct(_a, _b) / (magnitude(_a) * magnitude(_b));
 		if (answer < -1.0) {
@@ -116,6 +116,7 @@
 		return (sine(this, _a));
 	}
 
+	@SuppressWarnings("nls")
 	public String toString() {
 		return ("(" + x + ", " + y + ", " + z + ")");
 	}
@@ -125,6 +126,7 @@
 		dump(pw);
 	}
 
+	@SuppressWarnings("nls")
 	public void dump(PrintWriter _pw) {
 		_pw.println("-----");
 		_pw.println("dumping Vector3D");
diff --git a/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/io/BMPReader.java b/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/io/BMPReader.java
index 60a3457..0c6e1e3 100644
--- a/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/io/BMPReader.java
+++ b/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/io/BMPReader.java
@@ -35,7 +35,7 @@
 			fis = new FileInputStream(_fileName);
 		} catch (FileNotFoundException e) {
 			e.printStackTrace();
-			throw new LowVisionIOException("The file was not found: "
+			throw new LowVisionIOException("The file was not found: " //$NON-NLS-1$
 					+ _fileName);
 		}
 		return (readInt2D(fis));
@@ -48,12 +48,13 @@
 			fis = new FileInputStream(_fileName);
 		} catch (FileNotFoundException e) {
 			e.printStackTrace();
-			throw new LowVisionIOException("The file was not found: "
+			throw new LowVisionIOException("The file was not found: " //$NON-NLS-1$
 					+ _fileName);
 		}
 		return (readBufferedImage(fis));
 	}
 
+	@SuppressWarnings("nls")
 	public static int getBitCount(String _fileName) throws LowVisionIOException {
 		FileInputStream fis = null;
 		try {
@@ -66,6 +67,7 @@
 		return (getBitCount(fis));
 	}
 
+	@SuppressWarnings("nls")
 	public static int getBitCount(InputStream _is) throws LowVisionIOException {
 		short bitCount;
 
@@ -113,6 +115,7 @@
 		}
 	}
 
+	@SuppressWarnings("nls")
 	public static BufferedImage readBufferedImage(InputStream _is)
 			throws LowVisionIOException {
 		int fileSize;
@@ -319,6 +322,7 @@
 		return (destImage);
 	}
 
+	@SuppressWarnings("nls")
 	public static Int2D readInt2D(InputStream _is) throws LowVisionIOException {
 		int fileSize;
 		int offSet;
diff --git a/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/io/BMPWriter.java b/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/io/BMPWriter.java
index 8838500..b7eac5d 100644
--- a/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/io/BMPWriter.java
+++ b/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/io/BMPWriter.java
@@ -55,7 +55,7 @@
 			fos = new FileOutputStream(_fileName);
 		} catch (FileNotFoundException e) {
 			e.printStackTrace();
-			throw new LowVisionIOException("The file was not found: "
+			throw new LowVisionIOException("The file was not found: " //$NON-NLS-1$
 					+ _fileName);
 		}
 		writeBufferedImage(_bi, fos, _bitCount);
@@ -76,7 +76,7 @@
 		// only for BufferedImage.TYPE_INT_RGB
 
 		if (_bitCount != 16 && _bitCount != 24) {
-			throw new LowVisionIOException("Invalid bitCount: " + _bitCount);
+			throw new LowVisionIOException("Invalid bitCount: " + _bitCount); //$NON-NLS-1$
 		}
 
 		int imageWidth = _bi.getWidth();
@@ -121,7 +121,7 @@
 		} catch (IOException e) {
 			e.printStackTrace();
 			throw new LowVisionIOException(
-					"IO error occurred when writing header.");
+					"IO error occurred when writing header."); //$NON-NLS-1$
 		}
 
 		WritableRaster srcRaster = _bi.copyData(null);
@@ -166,7 +166,7 @@
 		} catch (IOException e) {
 			e.printStackTrace();
 			throw new LowVisionIOException(
-					"IO error occurred while writing image data.");
+					"IO error occurred while writing image data."); //$NON-NLS-1$
 		}
 
 		try {
@@ -175,7 +175,7 @@
 		} catch (IOException e) {
 			e.printStackTrace();
 			throw new LowVisionIOException(
-					"IO error occurred when closing output streams.");
+					"IO error occurred when closing output streams."); //$NON-NLS-1$
 		}
 	}
 }
diff --git a/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/io/ImageFileReaderController.java b/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/io/ImageFileReaderController.java
index 943fdae..1ca4011 100644
--- a/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/io/ImageFileReaderController.java
+++ b/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/io/ImageFileReaderController.java
@@ -50,8 +50,8 @@
 					return;
 				}
 			}
-			DebugUtil.outMsg(null, "Thread for getting \"" + fileName
-					+ "\" was timed out.");
+			DebugUtil.outMsg(null, "Thread for getting \"" + fileName //$NON-NLS-1$
+					+ "\" was timed out."); //$NON-NLS-1$
 		} catch (InterruptedException ie) {
 			ie.printStackTrace();
 		} finally {
diff --git a/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/io/ImageFileReaderGetter.java b/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/io/ImageFileReaderGetter.java
index ccdedb1..08c7607 100644
--- a/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/io/ImageFileReaderGetter.java
+++ b/plugins/org.eclipse.actf.visualization.engines.lowvision/src/org/eclipse/actf/visualization/internal/engines/lowvision/io/ImageFileReaderGetter.java
@@ -44,8 +44,8 @@
 		try {
 			tracker.waitForID(0);
 		} catch (InterruptedException ie) {
-			DebugUtil.outMsg(this, "Thread for getting \"" + fileName
-					+ "\" was interrupted.");
+			DebugUtil.outMsg(this, "Thread for getting \"" + fileName //$NON-NLS-1$
+					+ "\" was interrupted."); //$NON-NLS-1$
 			// ie.printStackTrace();
 		}
 
@@ -60,7 +60,7 @@
 			gr.drawImage(im, 0, 0, null);
 		}
 		if (image == null) {
-			DebugUtil.outMsg(this, "BufferedImage is null.");
+			DebugUtil.outMsg(this, "BufferedImage is null."); //$NON-NLS-1$
 		}
 
 		caller.setBufferedImage(image);