clahe:MultipassFilter< { amount:{ default:1; description:"Blend between the original (0) and the full effect (1)."; label:"Amount"; max:1; min:0; step:0.01; type:"float"; }; clipLimit:{ default:3; description:"How much contrast a tile may gain. Low values are gentle; high values bring out detail but also noise."; label:"Clip limit"; max:20; min:1; step:0.1; type:"float"; }; tiles:{ default:8; description:"How many tiles the image is cut into on each side. More tiles means more local, and a stronger effect on small areas."; label:"Tiles per side"; max:16; min:1; type:"int"; }; }, > = ...
CLAHE (contrast-limited adaptive histogram equalisation) of OKLab lightness: each tile of a
tiles × tiles grid is equalised with its own histogram, clipped at clipLimit × the mean bin
(the excess spread evenly, which limits noise amplification), and pixels blend the mappings of
the four nearest tiles bilinearly so there are no seams. Hue and chroma are kept.
CLAHE (contrast-limited adaptive histogram equalisation) of OKLab lightness: each tile of a tiles × tiles grid is equalised with its own histogram, clipped at
clipLimit× the mean bin (the excess spread evenly, which limits noise amplification), and pixels blend the mappings of the four nearest tiles bilinearly so there are no seams. Hue and chroma are kept.