Quantization (image processing): Difference between revisions

Revision as of 13:42, 18 August 2005

Revision as of 13:49, 18 August 2005

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Although more frequent in the past, nowadays color quantization with pallets of lower than 256 colours is mainly used in [[GIF]] and [[PNG]] images. Using "nearest-neighbor" quantization and allowing fewer colours usually results in smaller file sizes, however sophisticated "random dithering" can actually inflate the final size.

==Quantization algorithms==

A standard quantization [[algorithm]] works in 2 steps:

#Analyze the image's color usage to select the new color palette.

#[[Dithering|Dither]] the image to the new color palette.

==Quantization algorithms==

An usual quantization algorithm is the Octree-based algorithm, as described in the [http://msdn.microsoft.com MSDN] article on [[ASP.NET]] color quantization

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