gauthier@ug.cs.dal.ca (Paul Gauthier) (05/07/91)
I'm interested in pointers to details about arithmetic compression concerning how I might impliment such a package. I am attempting to compress B&W fax images for long term storage. My main concern is in getting the smallest compressed size I can obtain, but I am interested in a fairly quick decompress time. I've heard arithmetic compression is extremely good at producing small output files on such images, but apparently its decompression times are rather slow. Compression time isn't much of an issue, BTW. Any pointers to literature or code tidbits concerning this compression method or any other that would fulfill the guidelines above would be greatly appreciated. PS: The image sizes would be 1728x2200 (fine mode) and/or 1728x1100 (standard mode); which of the two or if both will be used is not yet decided. PG ============================================================================ Paul Gauthier | gauthier@ug.cs.dal.ca President, Cerebral Computer Technologies | tyrant@dalac.bitnet Phone: (902)462-8217 Fax: (send email first) | tyrant@ac.dal.ca -- ============================================================================ Paul Gauthier | gauthier@ug.cs.dal.ca President, Cerebral Computer Technologies | tyrant@dalac.bitnet Phone: (902)462-8217 Fax: (send email first) | tyrant@ac.dal.ca
thomsen@spf.trw.com (Mark R. Thomsen) (05/11/91)
Paul Gauthier writes I'm interested in pointers to details about arithmetic compression concerning how I might impliment such a package. I am attempting to compress B&W fax images for long term storage. Have you looked at the standard fax compression (CCITT Group 3) to see how big the files are before they are expanded into a bitmap image? Perhaps they are already compact enough. Mark R. Thomsen