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Date Posted: 9/10/08

Summary: PHP -- image processing

Added several more scripts to this page such as:

Detect if an image is truecolor.
Convert an image from truecolor format to palette format.
Change one color in an image to another.  
Reduce the number of colors in an image from a max of 255.
discover how many colors are used in a given palette image.

I also talk briefly about image effects.

I am still working on finding a way to detect exactly which colors are used in a given image.