Re: Scanner Color Shift Problem

From: Frederik Ramm (frederik@remote.org)
Date: Fri Mar 02 2001 - 04:40:54 PST

  • Next message: Steve Underwood: "Re: Scanner Color Shift Problem"

    Hi,

    > This looks like a common colour merging problem. In most scanners there
    > is a physical separation between the red green and blue sensors. Most
    > scanners just feed data to the host with this separation, and the driver
    > needs to shuffle the scan lines to accurately merge the colours. You
    > will find code to perform this function in several sane backends. A
    > typical offset between each sensor row is 1/75 inch, but varies between
    > models.

    I know about that, and I've done the color merging "by the book" in my
    driver. Just to be on the safe side, I have changed the driver's
    offset by +/-1, and each time the error became even bigger. Then I
    tried the Windows driver that came with the product and it produced
    the same "error", so I have to assume it is a hardware problem.

    Bye
    Frederik

    -- 
    Frederik Ramm  ##  eMail frederik@remote.org  ##  N57°48.10' W005°40.32'
    

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