This week's book giveaway is in the OCPJP forum. We're giving away four copies of OCA/OCP Java SE 7 Programmer I & II Study Guide and have Kathy Sierra & Bert Bates on-line! See this thread for details.
You can create a subclass of the java.awt.RGBImageFilter (abstract) class. You will have to override the filterRGB(int x, int y, int rgbValue) methodto remove the red component. Beware, I have used this before and it was VERY sklow. It reduced animation rates from about 10fps to 2 fps. (for special reasons I had to filter before each frame was displayed in order to maintain the underlying values). Steve