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Preston_5564C06.fm Page 203 Friday, September 23, 2005 5:13 AM

CHAPTER 6 ■ VISION 203

public double[] getColorGram() {
return colorGram;
}
public void setColorGram(double[] colorGram) {
this.colorGram = colorGram;
}

public Object clone() {
double[] newCg = new double[24];
for (int d=0;d<24;d++) {
newCg[d] = colorGram[d];
}
return new ColorGram(newCg);
}
}

In Example 6-21, this is the filter applied in the ImageProcessing class. Again, it’s very
similar to the thresholding class, except I call isMatch() by passing in the ColorGram.

Example 6-21. ImageProcessing.colorRatio() and colorRatioCount()
public BufferedImage colorRatio(BufferedImage srcImg, ColorGram cg) {

int h = srcImg.getHeight();
int w = srcImg.getWidth();

BufferedImage dstImg = new BufferedImage(w, h, BufferedImage.TYPE_INT_RGB);
for (int y = 0; y < h; ++y) {
for (int x = 0; x < w; ++x) {
int srcPixel = srcImg.getRGB(x, y);
Color c = new Color(srcPixel);
// calls hard work done here.
if (cg.isMatch(c)) {
// for real color
dstImg.setRGB(x, y, c.getRGB());
// for binary color
//dstImg.setRGB(x, y, Color.BLACK.getRGB());
} else {
dstImg.setRGB(x, y, Color.BLACK.getRGB());
}

}
}
return dstImg;
}