EdomGroup Blog

Part of the work I've been doing for my thesis involves generating color images from indexed files. This is the same principle as any indexed image format (like GIF) where each pixel is a number which maps to a table of red, green, blue values. At the time I knew how to get the basic 256 colors from the color wheel. The problem was the fact that my indexed image needed over 100,000 different colors. Of course generating 100K colors is one thing, making an image that uses so many colors look good is another. So after a day of digesting color theory websites I finally understood the concept of a color space, color models, gamuts and enough on how they go together to make a Java class that lets me generate a color space where the colors work together. I've uploaded a zip of the class file here for anyone who can find some use for it. At the time I was tempted to add an alpha channel which would cause a gradient around color values, maybe later. To use the class simply call the generate method, the arguments are: the starting color offset (0 to 1785), next is the number of colors to generate, and finally the number of colors to skip in between.

Enjoy.

The pure color values are on the following offsets:

Offset	R	G	B
0	255	0	0
255	255	255	0
510	0	255	0
765	0	255	255
1020	255	255	255
1275	0	255	255
1530	0	255	0
1785	0	0	0