Dirk Str�ker wrote: > Hi, > > first of all thank you both for the quick and informative answers. > It is clear, that I get the best results with individual profiles for > every illuminant, but I fear, I have to deal with the common behavior > of the people working with microscopes and CCD-cameras doing this > "white balance" on the illuminant. I got to find the best realizable > solution and accept the lower precission. It will still be a great > enhancement of the color quality! > I think, we will try Marti's "quick and dirty"-solution, but how do I > estimate the value for the TempSrc in �K? What I have are RGB-values, > which are normally not equal. They should be my input white point, > which I want to be mapped to R=G=B at the end. Additionally I can't > be sure, that they lie exactly on the line of temperature dependent > white points (I do not know, how this line is called). And what are > my TempDest-values, how can I calculate them?
hi Dirk, How important is the numeric accuracy of the final colors? If you are doing quantitative density measurements, or you need to closely compare images taken at different times, then you'd really need to do a colorimetric analysis of the light before during, and after each run as part of each measuring sequence. OTOH, if you just need reasonably accurate colors, then consider adding a slider to set the TempDest parameter as Marti described earlier. This would allow your researchers to adjust each image, or batch of images manually, while still relying the base profile for the overall color correction. If you want more accuracy than that, then allow the user to select from several base profiles to get close, followed by fine tuning with the slider. You may not need to write your own code for this at all. Have you considered tarining the staff to use Photoshop or the Gimp to simply set a neutral point manually? Mike Russell www.curvemeister.com www.geigy.2y.net ------------------------------------------------------- SF email is sponsored by - The IT Product Guide Read honest & candid reviews on hundreds of IT Products from real users. Discover which products truly live up to the hype. Start reading now. http://ads.osdn.com/?ad_id=6595&alloc_id=14396&op=click _______________________________________________ Lcms-user mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/lcms-user
