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TIFF and LibTiff Mail List Archive

Thread

2000.10.04 16:24 "PHOTOMETRIC_YCBCR", by Raj Kumar S.
[...]
2000.10.06 13:50 "Re: Old-style JPEG and HP 9100C Digital Sender", by Frank Warmerdam
2000.10.06 13:31 "RE: Old-style JPEG and HP 9100C Digital Sender", by Ed Grissom
2000.10.06 14:21 "RE: Old-style JPEG and HP 9100C Digital Sender", by Martin Bailey
2000.10.06 17:56 "Re: Old-style JPEG and HP 9100C Digital Sender", by Joris Van Damme
[...]

2000.10.06 13:31 "RE: Old-style JPEG and HP 9100C Digital Sender", by Ed Grissom

In a previous message, Frank said:

What all sorts of things do people want to put in a V7.0 spec?

I agree with the items you mentioned:

  1. end of O_JPEG
  2. Deflate compression (end of LZW ??? nah, the patent expires in 2003)
  3. COMPLEX pixel values (int and double)

And want to add:

4) 64-bit offsets for files >4GB
5) Uninstantiated Tiles/Strips
6) Multispctral Photometric type
7) Reduced Resolution Image Generation Method
8) Tiff Trees for multi-image with Reduced Resolution
   versions for each image. (already adopted by Adobe)

And have a few "to-be-discussed" items:

64-bit integer pixels?
Transparent Value (not a mask)
"No Data" value
Wavelet compression

But even if it did fade in importance, is that the end of the world if some new format is able to what needs to be done?

As long as that format is not proprietary -- which is what Adobe wants (PDF). Other proprietary formats are making inroads -- MrSid, ECW etc.

Frank also quoted Joris as saying:

nor does it support tiled storage, for example (but these storage modes seem to add more complexity to tiff than usefullness sometimes).

We find that for large images accessed in a random manner (rather than sequential) strips are useless and tiles are the only way to go.

--
ed grissom

egrissom@ziimaging.com