Thanks. To LogLUV images , they can been found in the pics examples package at <http://www.remotesensing.org/libtiff/images.html> .
An description about the encoding can been found here: <http://www.anyhere.com/gward/pixformat/tiffluv.html> I prefere SGILOGDATAFMT_FLOAT to expand to an XYZ float triple and can create easily an XYZ profile (just with the danger of quantisation). regards Kai-Uwe Behrmann + imaging development / panoramas + color management + email: [EMAIL PROTECTED] Am 03.11.04, 12:17 +0100 schrieb Marti Maria: > > Ok, > Added support for colorimetric TIFF in tifficc, is available on CVS. > > Regards, > Marti. > > > ----- Original Message ----- > From: "Kai-Uwe Behrmann" <[EMAIL PROTECTED]> > To: "Lcms Liste" <[EMAIL PROTECTED]> > Sent: Tuesday, November 02, 2004 3:13 PM > Subject: Re: [Lcms-user] tifficc, chromatic tags and gray gamma > > > Am 02.11.04, 13:46 -0000 schrieb [EMAIL PROTECTED]: > > > > > > > Kai-Uwe Behrmann <[EMAIL PROTECTED]> said: > > > > > Marti, > > > > > > You suggest to use tiff tags (whitepoint, primary chromaticies, ...) to > > > obtain sufficient data for on-the-fly profile creation. > > > > > > Are there reasons not to support it in tifficc? > > > > My lazyness :-). Anyway they are not so frequent. This comes from pre-ICC age, > > and AFAIK there are very few TIFF readers supporting that. Today is easier just > > embed the corresponding ICC profile. It takes same disk space and many apps > > honors the profile. I will try to add the code for 1.14. Do you have any > > samples of such TIFFs? Just to make sure it works as expected... > > No, I simply read about and was considering supporting it. No > real example of such tiffs. > > > > The next question is about gray profiles and gamma. Does lcms assume > > > gamma 2.2 for PT_GRAY->PT_RGB? The kTRC tag of the input profile has > > > gamma = 1.0 . > > > > > > Well, lcms does use kTRC on gray profiles, this is how they work. The gamma > > should be 1.0 in that case. But then the input profile should be marked as > > monochrome, not RGB. > > Ok I will play with this a bit more. > > > Regards, > > Marti. > > > ------------------------------------------------------- This SF.Net email is sponsored by: Sybase ASE Linux Express Edition - download now for FREE LinuxWorld Reader's Choice Award Winner for best database on Linux. http://ads.osdn.com/?ad_id=5588&alloc_id=12065&op=click _______________________________________________ Lcms-user mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/lcms-user
