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October 2000
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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: > Joris Van Damme wrote: > > 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