JeremyAnsel.ColorQuant is a C# implementation of the Xiaolin Wu's Color Quantizer (v. 2). For a given 32-bit RGB or ARGB image, it will produce a 8-bit palletized image.
| Description | Value |
|---|---|
| License | The MIT License (MIT) |
| Documentation | http://jeremyansel.github.io/JeremyAnsel.ColorQuant |
| Code coverage | https://jeremyansel.github.io/JeremyAnsel.ColorQuant/coverage/ |
| Source code | https://github.com/JeremyAnsel/JeremyAnsel.ColorQuant |
| Nuget | https://www.nuget.org/packages/JeremyAnsel.ColorQuant |
| Build | https://ci.appveyor.com/project/JeremyAnsel/jeremyansel-colorquant/branch/master |
C Implementation of Xiaolin Wu's Color Quantizer (v. 2) (see Graphics Gems volume II, pages 126-133) : http://www.ece.mcmaster.ca/~xwu/cq.c.
Algorithm: Greedy orthogonal bipartition of RGB space for variance minimization aided by inclusion-exclusion tricks. For speed no nearest neighbor search is done. Slightly better performance can be expected by more sophisticated but more expensive versions.
For image with RGB data:
var quantizer = new WuColorQuantizer();
ColorQuantizerResult result = quantizer.Quantize(image, colorCount);For image with ARGB data:
var quantizer = new WuAlphaColorQuantizer();
ColorQuantizerResult result = quantizer.Quantize(image, colorCount);ColorQuantizerResult contains a palette and the result bytes.