otsu:MultipassFilter< { invert:{ default:false; description:"Swap black and white."; label:"Invert"; type:"bool"; }; }, > = ...
Automatic global threshold (Otsu) on perceptual luminance. A 256-bin histogram of the straight
colour is built with atomics (fully transparent pixels are skipped), one invocation picks the
threshold, a last pass applies it: white above, black at or below, alpha kept.
Automatic global threshold (Otsu) on perceptual luminance. A 256-bin histogram of the straight colour is built with atomics (fully transparent pixels are skipped), one invocation picks the threshold, a last pass applies it: white above, black at or below, alpha kept.