Re: Green-ness of microtek scanned images

Bernd Schroeder (bernd@aquila.muc.de)
Mon, 5 Apr 1999 17:38:44 +0200

On Sun, Apr 04, 1999 at 11:18:49PM -0800, De Clarke wrote:
>
> I just replaced microtek2.c and microtek2.h with those from the
> Mar 31 tarball, since Bernd had recommended that to another user.
>
> It seems to behave about the same -- preview always very red/green,
> with blue being replaced by red and everything else greenish --
> in normal scans, neutral colours seem to be too red/greeny with
> no blue in the mix, but blue areas seem ok.

This is a patch against pre1.01-4. Can you tell us, whether this patch
works for you or not ? Maybe David can include the patch into the
1.01 release if it works.

---------------------------cut here -----------------------------------
--- microtek2.c.orig Mon Apr 5 16:54:21 1999
+++ microtek2.c Mon Apr 5 17:16:32 1999
@@ -1843,11 +1843,15 @@
pad = (int) ceil( (double) (ms->ppl * bits_pp_in) / 8.0 ) % 2;
bpp = bits_pp_out / 8;

- /* The ScanMaker 636 has 3 * ppl + 6 bytes per line and the X6EL */
- /* 3 * ppl + 2 bytes per line (depth=8, even number of pixels), which */
- /* can not be explained by the documentation; bpl_ppl_diff corrects this */
- if (mi->model_code == 0x91
- && (md->revision == 1.10 || md->revision == 1.20))
+ /* Some models have 3 * ppl + 6 bytes per line if the number of pixels */
+ /* per line is even and 3 * ppl + 3 bytes per line if the number of */
+ /* pixels per line is odd. According to the documentation it should be */
+ /* bpl = 3*ppl (even number of pixels) or bpl=3*ppl+1 (odd number of */ /* pixels. Even worse: On different models it different at which */ /* position in a scanline the image data starts. bpl_ppl_diff tries */ /* to fix this */
+
+ if ( (mi->model_code == 0x91
+ && (md->revision == 1.10 || md->revision == 1.20))
+ || (mi->model_code == 0x98 && md->revision == 1.30 ) )
+
bpl_ppl_diff = ms->bpl - ( 3 * ms->ppl * bpp );
else
bpl_ppl_diff = ms->bpl - ( 3 * ms->ppl * bpp ) - pad;
---------cut there ------------------------------------------------------

> PS I think there was some discussion of this a month or two ago,
> but I forget the answer: does the light ever turn off in this
> scanner? it seems to stay on a long time even when idle ...

Yes, this is normal.

Bernd

-- 
Bernd Schroeder 
Email: mailto:bernd@aquila.muc.de
PGP public key available: mailto:pgp@aquila.muc.de | Subject: send key 



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