[Bug 247794] New: Make use of dust removal data

[Wolfram Quester-2]

https://bugs.kde.org/show_bug.cgi?id=247794

           Summary: Make use of dust removal data
           Product: digikam
           Version: 1.2.0
          Platform: Debian unstable
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: wishlist
          Priority: NOR
         Component: RAW files management
        AssignedTo: [hidden email]
        ReportedBy: [hidden email]


Version:           1.2.0 (using KDE 4.4.5)
OS:                Linux

Hi,

Canon cameras are able to record "dust removal data". These contain information
about dust on the sensor and can be used by software to remove dust spots from
the image during raw development. It would be nice if digikam would support
this, too.

Thanks,

Wolfi

Reproducible: Always

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[Gilles Caulier-4]

https://bugs.kde.org/show_bug.cgi?id=247794


Gilles Caulier <[hidden email]> changed:

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            Version|1.2.0                       |1.3.0




--- Comment #1 from Gilles Caulier <caulier gilles gmail com>  2010-08-15 12:30:06 ---
We need a new option in libraw to process these information. Perhaps to use a
white shot from camera to identify dust on sensor can be more universal.

I CC Alex from libraw project for information.

Gilles Caulier

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[Alex Tutubalin]

https://bugs.kde.org/show_bug.cgi?id=247794





--- Comment #2 from Alex Tutubalin <lexa lexa ru>  2010-08-19 09:07:58 ---
I don't think that we (LibRaw team) will develop such option in near future.
But we ready to accept any patches which improves image quality.

Anyway, it is possible to easy integrate such processing into LibRaw pipeline:
just call averaging routine on RAW data  after LibRaw::unpack() call, but
before LibRaw::dcraw_process() call. This routine may average data on dust
spots or do anything else you want.

I guess, dust removal procedure is not very easy, though. The dust pattern
depends heavily on light scattering between lens and sensor, so the pattern
will be different for every aperture value, every lens (esp. wide-angle ones)
and every zoom positions for zoom lens (again, especially for wide-angle
zooms).

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