Re: Epson 610 color output truncated with scanimage

From: Kees Lemmens (C.W.J.Lemmens@its.tudelft.nl)
Date: Sun Feb 18 2001 - 04:45:31 PST

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    Hi,

    Sorry to bother you again, but I improved the scanimage color hack for Epson
    Perfection 610 somewhat to work for all resolutions (75-150-300-600).

    It may be useful for other people with a Perfection 610, so that is why I
    bother you all once more.

    static void
    write_pnm_header (SANE_Frame format, int width, int height, int depth)
    {
      /* The netpbm-package does not define raw image data with maxval > 255. */
      /* But writing maxval 65535 for 16bit data gives at least a chance */
      /* to read the image. */
    + #ifdef EPSON610_COLOR_HACK
    + static int get_resolution (void);
    + #endif

      switch (format)
        {
        case SANE_FRAME_RED:
        case SANE_FRAME_GREEN:
        case SANE_FRAME_BLUE:
        case SANE_FRAME_RGB:
           printf ("P6\n# SANE data follows\n%d %d\n%d\n",
    + #ifdef EPSON610_COLOR_HACK
    + width,height -get_resolution() / 15,
    + #else
                   width,height,
    + #endif
            (depth <= 8) ? 255 : 65535);
          break;

    Now recompiling with with -DEPSON610_COLOR_HACK produces ppm files with the
    height parameter adjusted to fit (more or less) the actual image size (only for
    color !)

    best regards, 

    -- 
 Kees Lemmens,
 Email: C.W.J.Lemmens@its.tudelft.nl,
 WWW  : http://ta.twi.tudelft.nl/DV/Staff/Lemmens/index.html
 Home : 010-4742919/4740254, Office: 015-2787224, Fax/XOIP: 020-8666099

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