Version: 2.1.1 (using KDE 4.7.1) OS: Linux start showfoto load color image select channel mixer, tick monochrome, tick preserve luminosity move any of the sliders red, green or blue to another value than default parts of the image gets underexposed (clipping) or overexposed (clipping), i.e. luminosity is NOT preserved. Reproducible: Always Steps to Reproduce: load color image select channel mixer, tick monochrome, tick preserve luminosity move any of the sliders red, green or blue to another value than default Actual Results: parts of the image are underexposed (clipping) or overexposed (clipping), i.e. luminosity is NOT preserved. Expected Results: No under- or overexposure. Last version known to me where this not happened is digikam/showfoto 1.1.0 Quite annoying as I extensively use showfoto for professional photography.
I confirm the dysfunction. Sound like "Preserve Luminosity" option do not have any influence. Perhaps a signal/slot broken in GUI... Gilles Caulier
Note : Preserve luminosity work perfectly in Color mode. Dysfunction exist only in Monochrome mode. It's not a signal/slots connection problem. Gilles Caulier
Git commit 223d431b8817d3791ce6bf87dfb5d4a716bc70af by Gilles Caulier. Committed on 29/10/2011 at 23:55. Pushed by cgilles into branch 'master'. compute right monochrome gain to preserve luminosity when this one is required BUGS: 284625 M +12 -2 libs/dimg/filters/bw/mixerfilter.cpp http://commits.kde.org/digikam/223d431b8817d3791ce6bf87dfb5d4a716bc70af