[Digikam-devel] [Bug 266204] New: Inconsistent results with distortion correction between digikam, lensfun tool (tmod) and ufraw

[Xavier Raynaud]

https://bugs.kde.org/show_bug.cgi?id=266204

           Summary: Inconsistent results with distortion correction
                    between digikam, lensfun tool (tmod) and ufraw
           Product: digikam
           Version: 1.8.0
          Platform: Compiled Sources
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: Image Editor
        AssignedTo: digikam-devel at kde.org
        ReportedBy: xraynaud at gmail.com


Version:           1.8.0 (using KDE 4.5.5) 
OS:                Linux

I'm having troubles using the distortion correction tool of digikam with my
Panasonic GF1 and the 20mm pancake lensfun. 
There exists 2 lensfun parameter set to correct gf1/20mm images. One is
distributed in lensfun CVS and works pretty well with lensfun tmod tool. I made
the other which works relatively well with ufraw
(http://xraynaudphotos.free.fr/lensfun.php). For some strange reason, the ufraw
parameter set doesn't work with tmod and vice versa. This inconsistency between
 has already been filed at ufraw's bug system.
Unfortunately, none of these parameters sets appear to work with digikam which
corrects too much the distortion. Follows are 3 jpegs showing the corrections 
* lensfun parameters corrected image:
http://xraynaudphotos.free.fr/temp/lensfun.jpg
* ufraw parameters corrected image:
http://xraynaudphotos.free.fr/temp/ufraw.jpg
* original raw file : http://xraynaudphotos.free.fr/temp/P1010941.RW2

I may do something wrong, but I don't know what. 
Thanks for your help

Xavier. 

Reproducible: Always

Steps to Reproduce:
open a panasonic gf1 (with 20mm lens) raw image, open distortion
auto-correction, select panasonic gf1 and 20mm lens, look at the results. 

Actual Results:  
image corrected too heavilly

Expected Results:  
distortion corrected image

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