Thank you so very much, this changes everything!
I’ll try to find a moment to read your awesome paper.
Right off the bat though I notice something that seems a little strange to me:
So the lookup factor is a multiplier to the lookup size, but the default values in Qt are:
Lookup size : 16
Lookup factor : 0.1
so the actual lookup size would be 1.6 pixel, which means the algorithm would seek in an area that is almost directly connected to the mask?
I guess it’s not problematic but it seems counter-intuitive.
Anyway, this definitely shed light on this filter for me. Thanks again and thanks for developing the next version.