Gerhard, I appreciate your comments, very useful.
Sadly my images aren't optimal for what I want to do. Your suggestion of using a bit of blur is interesting. I think I need to try it and see what kind of results I get. Do any of the lcms binary tools provide for creating a profile from 2 files? Thanks, Kent On 8/4/07, Gerhard Fuernkranz <[EMAIL PROTECTED]> wrote: > Kent Tenney wrote: > > My use case: > > > > Several thousand images which have been color adjusted and > > sampled down. > > > > Have they only been > > * first downscaled by a well-know factor, using a downscaling method > which you can exactly reproduce now > * and then ONLY color adjusted > > or were they possibly > > * downsampled by an not exacatly known factor, or with an unknown > method, which you cannot reproduce exactly now > * cropped > * denoised > * sharpened > * or first color corrected, and then downscaled > * etc. > > If the latter applies, this makes things more difficult. For > establishing the color mapping you basically need two exactly registered > images of the same size, which differ ONLY by the color transformation, > but NO OTHER image manipulations, particularly no spatial ones, must > have been applied to the second image. Otherwise you can only try to to > register the source and destination image first, and/or to blur both > ones before establishing the color mapping. But this would of course > distort the resulting color mapping more or less. > > Regards, > Gerhard > > > I want to color correct the originals and keep keep them full size. > > I would want to script this using the Python lcms bindings and the > > Python Imaging Library. > > My guess is that I'd sample down the original to the same size as the > > color adjusted image, derive a color map from those 2 files, then apply > > the map to the original. > > > > So, it would not be necessary to map all colors, only the ones which > > exist in the original. > > > > ------------------------------------------------------------------------- > This SF.net email is sponsored by: Splunk Inc. > Still grepping through log files to find problems? Stop. > Now Search log events and configuration files using AJAX and a browser. > Download your FREE copy of Splunk now >> http://get.splunk.com/ > _______________________________________________ > Lcms-user mailing list > Lcms-user@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/lcms-user > ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ _______________________________________________ Lcms-user mailing list Lcms-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/lcms-user
