Hi Kai. Thanks for your reply.
Performing some sort of check on the data was what I had in mind. My original plan was to compare the names but performing a check across the entire profile data would probably be better. Thanks. Kev. ________________________________________ From: Kai-Uwe Behrmann [EMAIL PROTECTED] Sent: 08 June 2008 11:45 To: Kevin Gale Cc: lcms-user@lists.sourceforge.net Subject: Re: [Lcms-user] Compositing Camera Pictures Query - Help Required Am 07.06.08, 22:21 +0100 schrieb Kevin Gale: > I'll definitely check the site out. One last question. What I would like to > avoid is converting the image if the source profile is the same as the > destination profile. Do you know of a way to actually compare profiles to see > if they are the same? Looking at the description tag is a typical option but can be faked. Checking the resulting transform for identity in each table- and curves entry might be an other option. The drawback is the computational cost to create the transformation in the first place. I would expect the device link curves to be linear[0,1] and each table output entry matching the table input value. More pragmatically one might run the colour conversion over a simple fine grained test image and look for differences above a reasonable threshold. The test image should cover a reasonable range of patches to match the DL table. An other option, in case only two profiles are involved, is to check for identical md5 check sums as described in the ICC profile specification. kind regards Kai-Uwe Behrmann -- developing for colour management www.behrmann.name + www.oyranos.org PS: something like this would be nice in Oyranos ------------------------------------------------------------------------- Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://sourceforge.net/services/buy/index.php _______________________________________________ Lcms-user mailing list Lcms-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/lcms-user
