https://bugs.kde.org/show_bug.cgi?id=397346
Dmitry Kazakov <dimul...@gmail.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Resolution|--- |WAITINGFORINFO
Status|CONFIRMED |NEEDSINFO
CC| |dimul...@gmail.com
--- Comment #5 from Dmitry Kazakov <dimul...@gmail.com> ---
Hi, Alex!
There are several points I should make clear before making any real decision
about the bug:
1) The 'threshold' value in this filter is not directly linked to RGB values.
It is actually CIELAB deltaE (CIE76) value, normalized to a 0...255 range. So I
would not try to make any assumptions on its numerical values. Just 0 removes
nothing, 100 removes the selected color only, 255 is the value that removes
almost everything. The values in between are just interpolation of this
behavior :)
2) In the second version of your file, there is a bug, 'Filter Mask 2' of 'Copy
of Layer 1' removes black color instead of white. Therefore it gives
inconsistent behavior with the other mask. If you change the color of 'Filter
Mask 2' to white then they start behave quite consistently.
3) I don't actually understand what the problem is? Do you mean that value 255
doesn't hide everything?
https://en.wikipedia.org/wiki/Color_difference#CIE76
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