Am 01.10.08, 20:42 +0200 schrieb Pascal de Bruijn: > On Wed, Oct 1, 2008 at 8:00 PM, Kai-Uwe Behrmann <[EMAIL PROTECTED]> wrote: > > Am 01.10.08, 19:19 +0200 schrieb Pascal de Bruijn: > >> 2. It's not entirely unthinkable, that Canon DPP, does another proprietary > >> color transformation besides applying the ICC profile. > > > > It would be helpful to ask more concrete questions. > > > > What is misbehaving? Compared to which software? What means Canon DPP? > > It's Canon Digital Photo Professional. It's a Raw developer.
The default rendering is expectedly highly individual to this application. You cant easily expect to find the look of that application in other applications. > > As a hint: you know already about Argyll and littleCMS. These are two > > implementations. You can look at the accompanying tools for ICC colour > > transformations. > > Argyll does something entirely weird with this commandline: > tifficc -v -i canon_eos_400d_standard.icc -t 1 -c 2 IMG_3562.tif > IMG_3562_argyll.tif ... is the lcms tool. > LCMS works, but the colors seem a bit off when compared to the > in-camera results and DPP: > cctiff -v -p -i p canon_eos_400d_standard.icc -i p > sRGB_IEC61966-2-1_noBPC.icc -e 1 IMG_3562.tif IMG_3563_argyll.tif thats Argyll, but I will no comment, as I do not know the parameters well. > I have samples (including the profile) available here (I'm converting to > sRGB): > http://files.pcode.nl/temp/icc/ The raw file is not accessible. => Error 403 > If somebody has access to Photoshop, and the time, I'd love to see > what the results > look like when Photoshop applies canon_eos_400d_standard.icc as source profile > to IMG_3562_NOPROFILE.TIF, converting to sRGB. How does you obtain IMG_3562.tif? From the vendor application or is it identical with IMG_3562_NOPROFILE.TIF? I would not expect very different results from Photoshop, than the lcms output for the IMG_3562_NOPROFILE.TIF -> IMG_3562_LCMS.TIF . For the DPP jpeg, it is to be expected that there is some look involved in the conversion. For instance a gamma adjustment (1.2) goes a bit for that. Applying a own look and possibly additional processing beyond the ICC description is typical for most vendors. But as far as this, you did not measure the device with a target and create a own profile to get something "neutral" or as a references to compare. kind regards Kai-Uwe Behrmann -- developing for colour management www.behrmann.name + www.oyranos.org ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ Lcms-user mailing list Lcms-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/lcms-user
