|TIFF and LibTiff Mail List Archive|
LibTiff Mailing List
2006.09.26 23:25 "Re: [Tiff] Status of ISO JBIG and CIELAB JPEG support", by Jean-Yves Le Ridant
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.