Hallöchen! johannes hanika writes:
> On Wed, Jul 17, 2013 at 3:44 PM, Torsten Bronger < > [email protected]> wrote: > >> johannes hanika writes: >> >>> the basecurve is applied before the input color profile. that >>> means you'll distort the values with at least a matrix transform >>> after mapping through the curve. you'll do the same again for >>> the output profile, then rgb values will be measured by the >>> color picker. quite possible that there will be some computation >>> errors piling up (are you using a lot of lut profiles?). >> >> I haven't tried any LUT-based input profile so far (and I can't >> currently). Besides, http://darktable.org/redmine/issues/9510 > > /me thinks you're looking at the deep-blue-gamut-map bs again, > it's not done for lut profiles (in that sense it's actually more > accurate). For the basecurve thingy or the bug report thingy? As for basecurve, yes I agree that I didn't consider the fact that the matrix *combines* the RGB channels, so that anything can happen. However, I'm still irritated about how drastic the effect is. As for the cited bug report, cctiff+cLUT results in the same dark blue, in contrast to DT+cLUT, although the blue clamping doesn't happen in any case, as far as I can see. Tschö, Torsten. -- Torsten Bronger Jabber ID: [email protected] or http://bronger-jmp.appspot.com ------------------------------------------------------------------------------ See everything from the browser to the database with AppDynamics Get end-to-end visibility with application monitoring from AppDynamics Isolate bottlenecks and diagnose root cause in seconds. Start your free trial of AppDynamics Pro today! http://pubads.g.doubleclick.net/gampad/clk?id=48808831&iu=/4140/ostg.clktrk _______________________________________________ Darktable-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/darktable-users
