Hi, Ten years ago, we implemented a curve-based brightness/contrast filter in Krita using this:
https://www.mail-archive.com/lcms-user@lists.sourceforge.net/msg01509.html Now we've got a bug report about it: https://bugs.kde.org/show_bug.cgi?id=347533 If all the values of the curve are 0, we'd expect the output of the filter to be completely black, because there's no lightness anymore, and if all the values are 0xFFFF, we'd expect the output to be totally white. But in fact, in either case a ghost of the image is still visible. I'm not sure what's up, but it's something that happens inside lcms2. I've tried with different intents and conversion flags, but that doesn't seem to matter. Boudewijn ------------------------------------------------------------------------------ One dashboard for servers and applications across Physical-Virtual-Cloud Widest out-of-the-box monitoring support with 50+ applications Performance metrics, stats and reports that give you Actionable Insights Deep dive visibility with transaction tracing using APM Insight. http://ad.doubleclick.net/ddm/clk/290420510;117567292;y _______________________________________________ Lcms-user mailing list Lcms-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/lcms-user
