File:Colortest-04-ycbcr-lightness-02-tryclip-then-scale.png

Luminance assignment in YCbCr space to generate a layer whose brightness is that of its overlying layer, followed by a hybrid of the gamut-adaptive scaling and clipping techniques described in. This variant tries a Cb+Cr clip first, then a Cb+Cr scale if the clip actuaally clipped anything. Merely for comparison and probably not really a good idea...