Bug 247794

Summary: Add new tool to use dust removal data from camera
Product: [Applications] digikam Reporter: Wolfram Quester <wolfi>
Component: Plugin-Editor-CloneAssignee: Digikam Developers <digikam-bugs-null>
Status: RESOLVED FIXED    
Severity: wishlist CC: caulier.gilles, lexa
Priority: NOR    
Version: 1.3.0   
Target Milestone: ---   
Platform: Debian unstable   
OS: Linux   
Latest Commit: Version Fixed In: 7.5.0

Description Wolfram Quester 2010-08-13 23:59:06 UTC 
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
Comment 1 caulier.gilles 2010-08-15 12:30:06 UTC 
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
Comment 2 Alex Tutubalin 2010-08-19 09:07:58 UTC 
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).
Comment 3 caulier.gilles 2022-01-15 09:36:29 UTC 
The Hot Pixel tool is now available in Batch Queue Manager and can be chained with Raw Demosaicing.

Else a new Clone tool exist since digiKam 6.0.0 to remove artifacts from photo.

Gilles Caulier