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Exploring Color Quantization with 'HyAB' Formula and CIELAB Space

ibobev

10mo ago· 8 min readenNews

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Summary

The article discusses color quantization algorithms, specifically focusing on the 'HyAB' color distance formula and pixel mapping in CIELAB space for image conversion. It highlights the process of choosing the closest color in a fixed palette for each pixel to create a compressed version of the original image.

Key quotes

· 2 pulled

By “pixel mapping” I mean choosing for each pixel the closest color in a fixed palette.

The closest color is the one with the shortest Euclidean distance, computed in 3D for the RGB coordinates.

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I’ve been obsessing over color quantization algorithms lately, and when I learned that an image conversion app called Composite did its so-called pixel mapping step in CIELAB space, I instantly thought of the “HyAB” color distance formula I’d seen in the

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