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November 1999
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1999.12.01 14:42 "ZIP compression [was: libtiff 3.5.3 release.]", by Tom Kacvinsky
Hi, As you may or may not know, Adobe's Image Ready support ZIP compressed TIFFs (reading and writing), but they use a different tag for the compression scheme. ZIP compressed TIFFs as built by tiffcp cannot be opened in Image Ready, and vice versa. So it lloks like Adobe is already heading torwards adding ZIP compression to the TIFF specification, but is using a different tag scheme. I belive that Leonard Rosenthal (of Adobe) is on this list and could answer this question. Regards, Tom > > What is the compression tag TIFFTAG_COMPRESSION assigned to Zip? The file > tiff.h says > #define COMPRESSION_DEFLATE 32946 /* Deflate compression */ > An associated tag is Zip quality: > /* Note: quality level is on the ZLIB 1-9 scale. Default value is -1 */ > #define TIFFTAG_ZIPQUALITY 65557 /* compression quality level */ >