[sane-devel] ANNOUNCEMENT: dust removal: please test

[Rolf Bensch]

Gents,

I found this thread while searching for dust removal software with ir
channel.

Recently I added infrared channel scan for my CS9000F (Pixma). Now I am
thinking about implementing dust removal to the backend or to the frontend.

Please send me your latest experiences about dust removal. I'm also
interested in (re)using your code.

Unfortunately the old coolscan project has been removed from
sourceforge, so I cannot download "duster". Please send me the source
files or a link to them.

I already fetched antidust.c from Peters website.

Many thanks for your help in advance,
Rolf


Am 13.02.2013 11:10, schrieb Rolf Bensch:
> Hello Andras,
> 
> did some test with your 'duster' and with a very similar own algorithm, see
>  http://www.ciselant.de/projects/antidust/
> 
> Your duster seems to miss some pixels and/or areas of dust.
> Maybe test if you hit enough random choosen pixel to calcuate the
> interpolation and iterate some times over the nx,ny loops (rembering the
> already interpolated pixels).
> 
>  Peter
> 
> On Tue, Aug 20, 2002 at 10:59:50PM +0100, Major A wrote:
>>/ 
> />/ Hi all,
> />/ 
> />/ I'm proud to make available the first testing version of a
> />/ dust-removal facility for film scanners with IR readout. Currently it
> />/ is a stand-alone tool, but the actual algorithm is implemented in a
> />/ sanei library. The algorithm is so simple I can't think of a good
> />/ reason why I didn't come up with it earlier.
> />/ 
> />/ To get it, check out the latest CVS of the coolscan2 project on
> />/ sourceforge.net (http://coolscan2.sourceforge.net/). Then use the
> />/ program "duster" in the following way:
> />/ 
> />/   duster <rgb-image> <ir-image> <out-image>
> />/ 
> />/ The input images are the RGB and IR data obtained from a scan with the
> />/ coolscan2 driver. They can be in any format, in theory, but I've only
> />/ tested PNMs. The output file is written in PNM 8-bit format with a
> />/ gamma of 2.0 automatically applied (I used raw scans with neutral LUTs
> />/ for testing, that's why).
> />/ 
> />/ The thresholding algorithm is really really simple, expect some
> />/ improvement there later. It seems to work with my E6 scans, but it is
> />/ not very robust.
> />/ 
> />/ duster is only temporary, the functionality will eventually all be
> />/ included in some part of the SANE backend-frontend chain.
> />/ 
> />/ Please try this code and let me know what you think.
> />/ 
> />/   Andras
> />/ 
> />/ ===========================================================================
> />/ Major Andras
> />/     e-mail: andras at users.sourceforge.net <mailto:andras at users.sourceforge.net>
> />/     www:    http://andras.webhop.org/
> />/ ===========================================================================
> /
> -- 
> ------------------------------------------------------------------------
> Peter Seiderer                     E-Mail:  Peter.Seiderer at ciselant.de <mailto:Peter.Seiderer at ciselant.de>
> 
> 
> 
>     
> 
> ------------------------------------------------------------------------