Re: LZW compression

From: Eileen Mathias (mathias@ACNATSCI.ORG)
Date: Wed May 08 2002 - 13:44:29 CDT

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    Message-Id: <200205081847.g48Ilj722676@sitelicense.arizona.edu>
Date:         Wed, 8 May 2002 14:44:29 -0400
From: Eileen Mathias <mailto:mathias@ACNATSCI.ORG>
Subject:      Re: LZW compression
To: mailto:IMAGELIB@listserv.arizona.edu

    <pre> Personally, we don't compress anything for long term storage. We keep the raw data as it is captured.

    Eileen Mathias

    Eileen C. Mathias Information Services Librarian & Coordinator, Albert M Greenfield Digital
      Imaging Center for Collections Ewell Sale Stewart Library The Academy of Natural Sciences 1900 Benjamin Franklin Parkway Philadelphia, PA 19103 215-299-1140 215-299-1144 FAX mailto:mathias@acnatsci.org

    >>> mailto:RealW@CARNEGIEMUSEUMS.ORG 05/08/02 12:24PM >>>
    I have read that the Unisys patent on LZW compression will expire soon (ca. 2003). If this is so, I am curious whether readers of this list would consider TIFF with LZW compression a viable archival file format for images. The question in my mind is whether we expect the LZW format to be widespread enough that TIFF/LZW files can be accessed and read in the relatively far future. If not, are there other lossless compression formats that might be considered for long-term storage?

    William Real Director of Technology Initiatives Carnegie Museum of Art 4400 Forbes Ave. Pittsburgh PA 15213-4080 412-622-3267

    </pre>

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