AWARE [SYSTEMS]
AWare Systems, , Home TIFF and LibTiff Mailing List Archive

LibTiff Mailing List

TIFF and LibTiff Mailing List Archive
September 2006

Previous Thread
Next Thread

Previous by Thread
Next by Thread

Previous by Date
Next by Date

Contact

The TIFF Mailing List Homepage
Archive maintained by AWare Systems



New Datamatrix section



Valid HTML 4.01!



Thread

2006.09.22 01:07 "Status of ISO JBIG and CIELAB JPEG support", by A Wandering Libtiff User
2006.09.22 11:14 "Re: Status of ISO JBIG and CIELAB JPEG support", by Joris Van Damme
2006.09.25 17:08 "Re: Status of ISO JBIG and CIELAB JPEG support", by Joris Van Damme
2006.09.26 06:48 "Re: Status of ISO JBIG and CIELAB JPEG support", by A Wandering Libtiff User
2006.09.26 10:48 "Re: Status of ISO JBIG and CIELAB JPEG support", by Jean-yves Le Ridant
2006.09.26 11:56 "Re: Status of ISO JBIG and CIELAB JPEG support", by A Wandering Libtiff User
2006.09.26 12:50 "Re[2]: [Tiff] Status of ISO JBIG and CIELAB JPEG support", by Jean-yves Le Ridant
2006.09.26 17:53 "Re[2]: [Tiff] Status of ISO JBIG and CIELAB JPEG support", by Jean-yves Le Ridant
2006.09.26 21:20 "Re: Re[2]: [Tiff] Status of ISO JBIG and CIELAB JPEG support", by Chris Cox
2006.09.26 23:25 "Re: Status of ISO JBIG and CIELAB JPEG support", by Jean-yves Le Ridant
2006.09.26 14:02 "Re: Status of ISO JBIG and CIELAB JPEG support", by Joris Van Damme
2006.09.26 13:38 "Re: Status of ISO JBIG and CIELAB JPEG support", by Joris Van Damme
2006.09.27 06:13 "Re: Status of ISO JBIG and CIELAB JPEG support", by Graeme Gill
2006.09.27 12:38 "Re: Status of ISO JBIG and CIELAB JPEG support", by Joris Van Damme
2006.09.27 19:42 "Re: Status of ISO JBIG and CIELAB JPEG support", by A Wandering Libtiff User
2006.09.27 20:39 "Re: Status of ISO JBIG and CIELAB JPEG support", by Joris Van Damme
2006.09.28 18:39 "Re[2]: [Tiff] Status of ISO JBIG and CIELAB JPEG support", by Jean-yves Le Ridant
2006.09.29 08:30 "Re[2]: [Tiff] Status of ISO JBIG and CIELAB JPEG support", by Jean-yves Le Ridant
2006.09.29 12:50 "Re: Re[2]: [Tiff] Status of ISO JBIG and CIELAB JPEG support", by Joris Van Damme
2006.10.03 11:26 "Re[4]: [Tiff] Status of ISO JBIG and CIELAB JPEG support", by Jean-yves Le Ridant
2006.10.03 13:09 "Re: Status of ISO JBIG and CIELAB JPEG support", by Joris Van Damme
2006.10.19 12:56 "Re: Status of ISO JBIG and CIELAB JPEG support", by Leridant Jean-yves
2006.09.27 20:12 "Re: Status of ISO JBIG and CIELAB JPEG support", by A Wandering Libtiff User
2006.09.22 13:55 "Re: Status of ISO JBIG and CIELAB JPEG support", by Ed Grissom

2006.09.26 23:25 "Re: Status of ISO JBIG and CIELAB JPEG support", by Jean-yves Le Ridant

> Wait, what?

> Photoshop doesn't support ITULAB.
> Photoshop only supports CIELAB and ICCLAB encodings in TIFF.

Yes, so you have to replace the photometric tag in tiff's directory
by ICCLAB, then when loaded by Photoshop, apply a linear "level" to
a and b, matching the rescale of ITULAB specif.

Never used Photoshop ?
:-)
Of course there some loss against what would be a real ITULAB support.

For this test image, Photoshop see a valid ICCLAB jpegintiff structure,
and considering automatic exposure of a fax, compression ratio
( not had look to quantization tables but seems like
quality 20 or less, 10 Mo to 130k) ... colors are "plausible",
there's usuals jpeg's artefacts, but nothing you can attribute
to a bad color processing.

--
Jean-Yves