Re: [Lcms-user] ver 1.12 release candidate
An ICC-based CMM for color management
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From: Marti M. <ma...@li...> - 2003-11-29 15:14:57
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Hi, >configures/compiles without problems. Displaying is ok. Many thanks for the testing! >Would it be possible to change the file permissions? They are nearly >all set to executeable. Only configure and the other scripts would need >this flag been set. Oh, the old problem again. Well, I could try to do the tarball on a true linux machine ... but is this really necessary? >An further question I like to ask: >When does You think will floating point calculations get introduced in >lcms? In preperation of this: Are there any thoughts about how to handle >values of over paper white? This would be interessting for HDR scenes. Floating point support is already implemented. If you mean floating point as the internal way to make calculations, just use the USE_FLOAT toggle on lcms.h If you mean to pass floating point values to the color transform, take a look on the specifiers: TYPE_RGB_DBL TYPE_CMYK_DBL TYPE_Lab_DBL TYPE_XYZ_DBL TYPE_GRAY_DBL These are using double values instead on encoded ones. Of course at speed cost. >In preperation of this: Are there any thoughts about how to handle >values of over paper white? This would be interessting for HDR scenes. Well, this is largely left to the profile side. ICC spec doesn't allow highlights on Lab PCS with L* > 100, but nothing prevents you to build a profile on, say XYZ, that use Y > 100. Remember a CMM is really a "dumb" interpolation engine that knows nothing about the colorspace being handled. If you build a profile capable to handle highlights, the CMM will then understand highlights. I must add I've not seen any profile with such behavior, but it is theoretically possible. Best regards, and thanks again for the testing. Marti Maria The little cms project http://www.littlecms.com ma...@li... ----- Original Message ----- From: "Kai-Uwe Behrmann" <we...@ti...> To: "Marti Maria" <ma...@li...> Cc: "Lcms-User" <lcm...@li...> Sent: Wednesday, November 26, 2003 8:19 PM Subject: Re: [Lcms-user] ver 1.12 release candidate Marti, Am 26.11.03, 18:40 +0100 schrieb Marti Maria: > I've posted the 1.12 release candidates in site: > > http://www.littlecms.com/lcms112.zip > http://www.littlecms.com/lcms-1.12.tar.gz configures/compiles without problems. Displaying is ok. Would it be possible to change the the file permissions? They are nearly all set to executeable. Only configure and the other scripts would need this flag been set. An further question I like to ask: When does You think will floating point calculations get introduced in lcms? In preperation of this: Are there any thoughts about how to handle values of over paper white? This would be interessting for HDR scenes. Many thanks Kai-Uwe Behrmann |