Color Quantization and GDI+ GIF with much better quality

[OnErr0r]

This sample shows how to decrease colors in an image from 24bit to 8 bit. And various other numbers of colors as well, from 8 to 256. Quantization is done by using an octree. Many thanks to vbaccelerator.com.

GDI+ uses a halftone palette by default to save the image to file. This leads to terrible quality in many cases. This sample greatly improves the saved GIF image. Enjoy!

 

[OnErr0r]

Color Quantization Update

I have added Arrays to create bitmap objects and GDI+ API. Quantization is substantially faster now.