Message-Id: <mailto:199408261834.NAA25827@library.wustl.edu> Date: Thu, 25 Aug 1994 16:35:19 -0700 From: Robert MacKimmie <mailto:rm@CALIFHISTSOC.ORG> Subject: Re: Image database/ RE: Huffman encode (FAX-style) encryption and To: Multiple recipients of list IMAGELIB <mailto:IMAGELIB@ARIZVM1.BITNET>
Begin forwarded message: Date: Thu, 25 Aug 1994 08:26:19 -0700 From: Raymond Lauzzana <mailto:lauzzana@netcom.netcom.com> Subject: Re: Image database/ WWW---(compression!!!)>>>"Is anyone out there using Huffman encode (FAX-style) encryption
and storage for Black&White images. It seems to be a very effecient way to store fairly high resolution text documents and line drawings. Has there been much experimentation with this method of compression for image databases? - Ray Lauzzana"If you are referring to Type III and Type IV compression, it works very well for documents, especially in a high speed document scanner, with or without conversion via OCR, but my recollection is that those forms of compression only work with line art, or 1-bit scanning. Photos, needing at least 8 bit, would be out of the loop on this one. But Type IV compression is very efficient at squeezing TIFFs.
Cheers, Robert MacKimmie, California Historical Society mailto:rm@califhistsoc.org