[Alex Bond]
> Hi
>
> I managed to achieve better Mustek SE12000 performance without
> "forwards-backwards" by making the buffer size in mustek.c, i.e.
> lines_per_buffer = 15603 (or up to 16800) / bpl;
> for scanning at up to 300 and (sometimes?!) 600 dpi in Gayscale and
> 75 dpi in color. The carriage does stop while scanning still, but as
> there is no backward movement, the overall performance is much
> better now!
>
> Well, I tried with the new sg.h to increase the SG_BIG_BUFF to 2MB
> while setting in the backends
> lines_per_buffer = scsi_max_req_sise / bpl;
> The scanner (SE !!!) accepts it. And it scans with making 2M
> requests. The backwards-forwards problem however persists. So it
> looks like it is the sanei_scsi.c implementation that is being
> guilty for not freeing the scanner's internal buffer properly.
>
> Another thing that I noticed is that in Win scanning at greater
> resolution is done with physically slower carriage movement, which
> is not the case with sane. The carriage tries to move fast, then the
> internal buffer is (probably) filled and backwards-forwards
> happens. It might be therefore possible that one somehow should try
> n set the scanning speed (which is disabled in Mustek).
>
> Hope the above (empirical) information may be useful.
>
> Regards and Guessen,
>
> Alex Bond
> alex831973@geocities.com
I'm pretty sure the info is useful, and pass it on to the list.
Please send such information directly to the list
sane-devel@mostang.com the next time. :-)
Happy hacking
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