Re: [Lcms-user] lcms vs. libjpeg for CIELAB ITU-Fax T.43/T.42

2007-10-27 Thread Marti Maria
You may want to give a look to this page: http://www.littlecms.com/itufax.htm Hope this helps, Marti Maria The littleCMS project www.littlecms.com On 24/10/2007 1:19:11, Hal V. Engel ([EMAIL PROTECTED]) wrote: > On Tuesday 23 October 2007 15:44:34 Lee Howard wrote: > > Hal V. Engel wrote: >

Re: [Lcms-user] lcms vs. libjpeg for CIELAB ITU-Fax T.43/T.42

2007-10-26 Thread Kai-Uwe Behrmann
2. try Am 24.10.07, 07:46 +0200 schrieb Kai-Uwe Behrmann: > Am 23.10.07, 15:41 -0700 schrieb Lee Howard: > > There are a couple of samples of ITULAB JPEG in TIFF here: > > > > http://bugzilla.remotesensing.org/show_bug.cgi?id=736 They are broken: Rows/Strip: (infinite) Such tiff's are not prop

Re: [Lcms-user] lcms vs. libjpeg for CIELAB ITU-Fax T.43/T.42

2007-10-23 Thread Kai-Uwe Behrmann
Am 23.10.07, 15:41 -0700 schrieb Lee Howard: > There are a couple of samples of ITULAB JPEG in TIFF here: > > http://bugzilla.remotesensing.org/show_bug.cgi?id=736 Thanks. > Attach the ICC profile into the TIFF? Could you elaborate, please? #include TIFFSetField(tif, TIFFTAG_ICCPROFILE, icc

Re: [Lcms-user] lcms vs. libjpeg for CIELAB ITU-Fax T.43/T.42

2007-10-23 Thread Hal V. Engel
On Tuesday 23 October 2007 15:44:34 Lee Howard wrote: > Hal V. Engel wrote: > >I find several references on the web to a CIELab ITU/Fax profile named > >iitufax.icm but I was not able to find a copy of it. But if it is > > available or if there are enough specifications to create one then using >

Re: [Lcms-user] lcms vs. libjpeg for CIELAB ITU-Fax T.43/T.42

2007-10-23 Thread Lee Howard
Hal V. Engel wrote: >I find several references on the web to a CIELab ITU/Fax profile named >iitufax.icm but I was not able to find a copy of it. But if it is available >or if there are enough specifications to create one then using lcms to >convert between the normal colorspaces that we see u

Re: [Lcms-user] lcms vs. libjpeg for CIELAB ITU-Fax T.43/T.42

2007-10-23 Thread Lee Howard
Kai-Uwe Behrmann wrote: >I've got a opposite question. Can you provide a ITU tiff file example and >probably a sRGB conterpart to cross check? > > There are a couple of samples of ITULAB JPEG in TIFF here: http://bugzilla.remotesensing.org/show_bug.cgi?id=736 The dialogue there may interest

Re: [Lcms-user] lcms vs. libjpeg for CIELAB ITU-Fax T.43/T.42

2007-10-23 Thread Bob Friesenhahn
On Tue, 23 Oct 2007, Hal V. Engel wrote: > > I find several references on the web to a CIELab ITU/Fax profile named > iitufax.icm but I was not able to find a copy of it. But if it is available > or if there are enough specifications to create one then using lcms to > convert between the normal co

Re: [Lcms-user] lcms vs. libjpeg for CIELAB ITU-Fax T.43/T.42

2007-10-23 Thread Hal V. Engel
On Tuesday 23 October 2007 14:17:01 Kai-Uwe Behrmann wrote: > Hello Lee, > > I've got a opposite question. Can you provide a ITU tiff file example and > probably a sRGB conterpart to cross check? > > Libjpeg should be handle each 3 channel colour space equally. Provided you > attach a colour descri

Re: [Lcms-user] lcms vs. libjpeg for CIELAB ITU-Fax T.43/T.42

2007-10-23 Thread Kai-Uwe Behrmann
Hello Lee, I've got a opposite question. Can you provide a ITU tiff file example and probably a sRGB conterpart to cross check? Libjpeg should be handle each 3 channel colour space equally. Provided you attach a colour description, best a ICC profile. kind regards Kai-Uwe Behrmann -- developin

[Lcms-user] lcms vs. libjpeg for CIELAB ITU-Fax T.43/T.42

2007-10-23 Thread Lee Howard
Hello. I'm researching the best method to extend color fax support in HylaFAX. Currently HylaFAX can, with the right configuration, receive a color fax which gets stored wrapped in a TIFF file using libtiff. HylaFAX cannot currently send color fax. Due to the problem that most TIFF viewers ar