public int[] doContrast(int[] pix, int iw, int ih, double contrast)
{
ColorModel cm = ColorModel.getRGBdefault();
int r, g, b;
for(int i = 0; i < iw*ih; i++)
{
r = (int) (contrast>=0?cm.getRed(pix[i]) + (255-cm.getRed(pix[i]))*contrast:
cm.getRed(pix[i]) + cm.getRed(pix[i])*contrast);
g = (int) (contrast>=0?cm.getGreen(pix[i]) + (255-cm.getGreen(pix[i]))*contrast:
cm.getGreen(pix[i]) + cm.getGreen(pix[i])*contrast);
b = (int) (contrast>=0?cm.getBlue(pix[i]) + (255-cm.getBlue(pix[i]))*contrast:
cm.getBlue(pix[i]) + cm.getBlue(pix[i])*contrast);
pix[i] = 255 << 24|r << 16|g << 8|b;
}
System.out.println("contrast is: " + contrast);
return pix;
}
