contrast:PointwiseFilter< { amount:{ default:0; description:"Negative flattens the picture, positive makes darks darker and lights lighter."; label:"Amount"; max:1; min:-1; step:0.01; type:"float"; }; }, > = ...
Scales OKLab lightness around 18% grey by 2^amount; chroma (a, b) is untouched.
Lightness is floored at 0 so strong contrast cannot produce negative light.
Scales OKLab lightness around 18% grey by 2^amount; chroma (a, b) is untouched. Lightness is floored at 0 so strong contrast cannot produce negative light.