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- From: veloso@husc9.harvard.edu (Manuel Veloso)
- Newsgroups: comp.lang.postscript
- Subject: Re: Compressed TIFFs and Postscript
- Message-ID: <1992Dec30.143521.18903@husc3.harvard.edu>
- Date: 30 Dec 92 19:35:20 GMT
- Article-I.D.: husc3.1992Dec30.143521.18903
- References: <0105002B.mcu7to@digtype.airage.com>
- Distribution: world
- Organization: Harvard University
- Lines: 21
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- X-XXMessage-ID: <A76765E0F0011817@humcr3.harvard.edu>
- X-XXDate: Wed, 30 Dec 92 14:42:40 GMT
-
- In article <0105002B.mcu7to@digtype.airage.com> Jeff Wasilko,
- Jeff@digtype.airage.com writes:
- >How are LZW-compressed TIFFs handled in Postscript (I'm thinking of
- >a compressed TIFF placed in a Quark XPress document)?
- >
- >How is the image uncompressed? Is the decompression routine included
- >in the postscript, or can the PS interpreter deal with the compressed
- >image directly? How fast will the decompression run on a Linotype
- >RIP 4 (a 68020)?
-
- For level 1, the TIFF is uncompressed by XPress (then clipped &
- re-rezzed, btw) and send. Level 2 can decompress them, but I'm not sure
- if Quark does that yet.
-
- >I'm wondering if the savings in disk storage and transfer time (the
- >RIP 4 is on LocalTalk) will be lost in decompression time at the
- >RIP?
-
- Yes, assuming it uses level 2 for decompression, no if it doesn't.
-
- Manuel
-