RE: Getting compressed B/W image data from Fujitsu M3096GXm scann er

From: Armistead, Jason (armistej@oeca.otis.com)
Date: Sun Feb 04 2001 - 15:53:44 PST

  • Next message: Armistead, Jason: "RE: Getting compressed B/W image data from Fujitsu M3096GXm scann er"

    Hi Peck

    Product documentation for all the Fujitsu scanners can be found at

    http://www.fujitsu-europe.com/home/documentation.asp?osc=fel&lang=en&cat=9

    which has PDF files of the OEM manuals which contain the SCSI specific
    sequences for the M3096GX family.

    Since I'm not a SCSI guru yet, though I am learning, any help is definitely
    appreciated.

    As far as technical specifications of the compression board go, it basically
    allows the following:

    MH (Modified Huffman) = CCITT Group 3 1D
    MR (Modified READ) = CCITT Group 3 2D (specify K factor)
    MMR (Modified Modified READ) = CCITT Group 4 2D

    using the SET WINDOW SCSI command and specifying a non-zero value for the
    compression type byte 0x20 (MR = 1, MR = 2, MMR = 3 as per SCSI scanner
    spec), and for MR compression, using the compression argument byte 0x21 to
    specify the K factor.

    I have just had a look at Tom Martone's sane-bh patches for the Bell &
    Howell COPISCAN family and it looks like that's pretty close to what I want
    to do in terms of MH, MR and MMR compression. I'll have a look at it and
    see if I can fuse it back into the M3096G driver.

    Regards

    Jason

    -----Original Message-----
    From: Peck Dickens [mailto:peck_d@bellsouth.net]
    Sent: Friday, 2 February 2001 18:18
    To: sane-devel@mostang.com
    Subject: Re: Getting compressed B/W image data from Fujitsu M3096GXm
    scanner

    On Fri, 02 Feb 2001, you scribbled:

    > Any ideas, suggestions ? Sample code (or attempts at it) most welcome ...

    Do you have the technical specifications for the compression board from
    Fujitsu?
    That's where you have to start... Once you get that, implimenting
    compression
    is possible.

    I would be willing to work with you on this in the event you are interested.

    Best

    M. Peck Dickens

    System stats: 2:16am up 1 day, 10:30, 3 users, load average: 0.27, 0.38,
    0.46 

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