Hello Peter!
Peter Karp schrieb:
I think, it's not just because of the options, I'm also mostly satisfied with the results. For me, the most interesting feature is printer profiling, since Argyll seems to be the only free, and open source, printer profiling tool in the world (with IMO good results - but since I do not own a professional $$$$ profiler, I must admit that I can't compare).Do you like it for the results you achieve or advanced options?
Argyll can also create both types, but if you need matrix profiles only, the whole framework may be overkill.At the moment I'm mainly interested in building monitor profiles. And because of the bug all Photoshop versions do have when using a LUT-based monitor profile (gray balance is lost) I'd prefer a simple matrix based profile anyway.
CRT monitors can be modeled by matrix/TRC profiles pretty accurately anyway, thus for a colorimetric intent, matrix/TRC profiles are IMO absolutely sufficient. But for LCD displays, and also for perceptual intent of CRT monitors (with gamut mapping, CIECAMxx transform, etc.), a LUT based profile is IMO rather unavoidable. If the LUTs aren't carefully chosen, there is of course always a risk, that a grayscale does not render perfeclty netural with a CLUT profile, due to interpolation errors, but you're saying, in your case it is not a fault of the profile, but Photoshop, right?
Are the reasons known? Just curious..
Let me refer to a posting from Marti from Sep 2003 to this list:
"More news. Now regarding profilers and professional zone. Professional profilers have been adquired by a third party before they got available to public. In order to avoid the sensation of "vaporware" this notice could suggest, I will dump to public domain the scanner and monitor profilers. This will be on next weeks, as soon as I could complete the English translation.
Since the source code is no more on public domain, this will be A BINARY (EXE) ONLY, and WINDOWS ONLY. Very sorry for that, but is the only way to offer advanced capabilities like 16 bits (RAW mode) profiling and support for hardware devices like Eye-One. The profiler is totally GUI based and includes TWAIN support, printing, and many other goodies.
So, if anybody is interested in old profiler sources, I would urge to grab them soon, as I will remove all but the executable from site in a couple of weeks. SourceForge will probably continue keeping them, but this latter is not for sure."
Well, we must grant Marti his pocket money. Like we all, he also needs to survive somehow, life is hard in this world :-) Likely, this still cannot compensate what he gives to the whole world with LCMS.
That would be possible, better said allowed?
Lprof, up to version 1.09 was imo distributed by Marti under the GNU GPL.
"[...] This file is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. [...]"
It is not too complicated to create matrix profiles. Nevertheless there can be small differences between different profilers, for instance depending on how the TRC curves are modeled (gamma, gamma+gain+offset, splines, polynomials, Argyll's method (-> "Fast Alternatives to Perlin's Bias and Gain Functions" from Graphic Gems), etc.), or depending on the error metric used for the optimization.Has somebody already tested if there's a difference in quality of the new profiler and the old one when building matrix monitor profiles? I guess that there's no or little difference, because that's a pretty simple profile type. Haven't found time to take a closer look.
Regards, Gerhard
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