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

Major A andras@users.sourceforge.net
Tue, 20 Aug 2002 22:59:50 +0100

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.


Major Andras
    e-mail: andras@users.sourceforge.net
    www:    http://andras.webhop.org/