[Digikam-devel] [Bug 170169] Idea for high quality 8-bit curve adjustments

[Dik Takken]

https://bugs.kde.org/show_bug.cgi?id=170169

--- Comment #11 from Dik Takken <d.h.j.takken at xs4all.nl> ---
Tested on 2.6.0, and it works beautifully if you 

1. Convert to 16-bit depth
2. Apply curves
3. Convert back to 8-bit

This yields a smooth output histogram. Maybe it would be nice to do this
conversion in the curves adjustment function itself, that would yield high
quality curve adjustments out of the box.

See also bug #310211 which suggests a solution for the same problem, for 16-bit
images.

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