private static short[][] makeHSImap() {
short[][] hue = new short[256][1];
short[][] sat = new short[256][1];
short[][] intens = new short[256][1];
for (int i = 0; i < 256; i++) {
hue[i][0] = (short) i;
sat[i][0] = 255;
intens[i][0] = (short) Math.round(255 * HSIImage.maxIntensity(i / 255.0, 1.0));
}
HSIImage hsiim = new HSIImage(hue, sat, intens);
RGBImage rgbim = hsiim.makeRGBImage();
short[][] red = rgbim.getRed();
short[][] green = rgbim.getGreen();
short[][] blue = rgbim.getBlue();
short[][] colormap = new short[256][3];
for (int i = 0; i < 256; i++) {
colormap[i][0] = red[i][0];
colormap[i][1] = green[i][0];
colormap[i][2] = blue[i][0];
}
return colormap;
}
/**
* A constructor that creates an IntensityImage from a RGBImage by letting the gray scale
* intensity be the average of the red, green and blue intensities.
*
* @param rgbImage Original image.
*/
public IntensityImage(RGBImage rgbImage) {
this();
int rows = rgbImage.getHeight();
int cols = rgbImage.getWidth();
data = new short[rows][cols];
short[][] red = rgbImage.getRed();
short[][] green = rgbImage.getGreen();
short[][] blue = rgbImage.getBlue();
int m;
for (int row = 0; row < rows; row++) {
for (int col = 0; col < cols; col++) {
m = (red[row][col] + green[row][col] + blue[row][col]) / 3;
data[row][col] = (short) m;
}
}
}