Guided filter (He, Sun & Tang) of a mask with the image's perceptual luminance as guide: the
mask's edges move to nearby edges in the image, flat regions are smoothed. CPU, linear in the
pixel count (integral images); meant for masks at mask resolution, with a guide of the same size.
Guided filter (He, Sun & Tang) of a mask with the image's perceptual luminance as guide: the mask's edges move to nearby edges in the image, flat regions are smoothed. CPU, linear in the pixel count (integral images); meant for masks at mask resolution, with a guide of the same size.