1997.02.12 00:23 "TIFF 6.0 JPEG or OJPEG_SUPPORT", by Henri Schueler
Thread
1997.02.12 03:56 "TIFF 6.0 JPEG or OJPEG_SUPPORT", by Ali Ozer
You could try decompressing them on a NeXT... They should load OK.
BTW, you should note that there are two "old jpeg TIFF" formats on the NeXT; one is real old, using all sorts of tags obsoleted in 6.0, and one is based on the early drafts of 6.0. Here are the tags:
The "real old":
Directory at 0x19bfa
Image Width: 530 Image Length: 799
Tile Width: 544 Tile Length: 800
Resolution: 144, 144
Resolution Unit: pixels/inch
Bits/Sample: 8
Compression Scheme: NeXTstep 2.0 JPEG encoding (32865)
Photometric Interpretation: RGB color
JPEG Processing Mode: 0 (0x0)
JPEG Restart Interval: (no restart markers)
Samples/Pixel: 3
Number of Tiles: 1
Planar Configuration: Not planar
The early 6.0:
Directory at 0x1a940
Image Width: 530 Image Length: 799
Tile Width: 544 Tile Length: 256
Resolution: 144, 144
Resolution Unit: pixels/inch
Bits/Sample: 8
Compression Scheme: JPEG encoding (6)
Photometric Interpretation: RGB color
YCbCr Subsampling: 2, 2
YCbCr Coefficients: 0.299, 0.587, 0.114
JPEG Processing Mode: baseline sequential algorithm
JPEG Quantization Tables: (present)
JPEG DC Tables: (present)
JPEG AC Tables: (present)
Samples/Pixel: 3
Number of Tiles: 4
Planar Configuration: Not planar
Reference Black/White: 16, 235, 128, 240, 128, 240
I can't come up with more details without much research...
Ali