The documentation of MaskImage states that masked pixels will be ignored by modules that respect masks but I can’t find a list of which modules respect masks and which ones don’t. What will MeasureTexture do if I run it in Images mode on output from MaskImage? Will it:
(a) Compute the texture using only the domain inside the mask, ignoring the big black expanse surrounding them?
(b) Compute the texture of the whole masked image, including the big black perfectly smooth expanse, therefore returning smoother texture values when the mask covers more of the image.