Hi Elle,
Thanks for reporting. I was using VS2012 and VS2013 under win7. Next monday will try some linux and mac. If platforms differ, then this may be a nasty issue. Regards Marti. Quoting Elle Stone <ellest...@ninedegreesbelow.com>: > On 09/11/2014 06:32 PM, marti.ma...@littlecms.com wrote: >> >> >> Hi Elle, >> >> Sorry, with the profiles you sent and transicc from lcms2-2.6, this does >> not happen. I got the expected values. >> Please check the version of lcms2 you are using. >> >> BTW, -c0 is not needed in lcms2 and may cause problems. This may be the >> source of the issue in versions previous to 2.6 >> >> M:\lcms2-2.6\bin>transicc -c0 -t1 -w -o sRGB-V2-g10.icc -i sRGB-V4-g20.icc >> LittleCMS ColorSpace conversion calculator - 4.2 [LittleCMS 2.06] >> >> Enter values, 'q' to quit >> R? 255 >> G? 0 >> B? 0 >> >> R=255.0000 G=0.0000 B=-0.0000 >> >> Enter values, 'q' to quit >> R? 255 >> G? 255 >> B? 0 >> >> R=255.0000 G=255.0000 B=0.0000 >> >> Enter values, 'q' to quit >> >> > > Hi Marti, > > Thanks! for checking. I tried with and without "-c0", running LCMS2 > versions 2.5, 2.6 and from git on my 64-bit Gentoo box. I also > checked on a 32-bit OpenSuse machine and a 32-bit Arch Linux > machine. Results were identical in all cases. The near-zero and zero > channel values aren't converting correctly. > > Could our different results be from running different platforms? I > don't have access to an Apple or Windows machine. > > As a check I tried converting a 16-bit tiff with a gradient running > from red to black, zero in the green and blue channels, from linear > gamma to gamma=2.0 versions of sRGB, using cctiff, tifficc, and > tificc. > > Upon opening the converted tiffs with GIMP from git and color > picking across the gradients, the cctiff and tifficc gradients were > still zero in the green and blue channels, all across the gradient. > But the tificc version had green channel values between 0 and 10, > and blue channel values between 0 and 3, flipping randomly as the > red channel value changed (not proportional to the red channel value). > > Elle ------------------------------------------------------------------------------ Want excitement? Manually upgrade your production database. When you want reliability, choose Perforce Perforce version control. Predictably reliable. http://pubads.g.doubleclick.net/gampad/clk?id=157508191&iu=/4140/ostg.clktrk _______________________________________________ Lcms-user mailing list Lcms-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/lcms-user
