I had sent this during the down period.

Here it is again.

I have done some more experimenting with using the GIMP's destriping filter, 
which seems to work
very nicely.  I'd still like to understand why it happens though.

Chris Marshall

--- Christopher Marshall <[email protected]> wrote:
> Date: Mon, 8 Mar 2004 07:29:11 -0800 (PST)
> From: Christopher Marshall <[email protected]>
> Subject: verticle stripes in high res scans
> To: [email protected]
> 
> I have a CanoScan LiDE 80 that I have been happily using with SANE for a few 
> months now.
> 
> I have noticed verticle stripes or bands of brightness and darkness when I 
> scan photos at high
> res.
> 
> I'm taking a small photo and scanning it at high res.
> 
> Does anyone know what causes this or how to combat it?
> 
> I see that the Gimp has a destripe filter written specifically for this 
> problem.
> 
> Is post-processing with a destriping filter the way a windows driver would 
> handle this problem?
> 
> Perhaps a better question would be: how much of the difference in quality 
> between default SANE
> scans and scans done with the windows driver (for the same scanner) are due 
> to simple
> post-processing steps that can be done with GIMP like programs?
> 
> Chris Marshall
> 


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