[Bug 284708] New: Lens Autocorrection overcompensates distortion

https://bugs.kde.org/show_bug.cgi?id=284708

           Summary: Lens Autocorrection overcompensates distortion
           Product: digikam
           Version: 2.1.1
          Platform: Ubuntu Packages
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: Image Editor
        AssignedTo: [hidden email]
        ReportedBy: [hidden email]


Version:           2.1.1 (using KDE 4.7.1)
OS:                Linux

Enhance > Lens > Autocorrection overcompensates distortions.


Reproducible: Always

Steps to Reproduce:
start showfoto with any image which has exif data.
The same problem when you enter parameters manually.

Actual Results:  
Barrel distortion becomes pincushion distortion

Expected Results:  
Barrel distortion should become straight grid

If you change in lensfun/slr-nikon.xml (I assume that would hold for any other
parameter file) the cropfactor for all lenses from 1.5 to 1.0 and keep the
original cropfactor for the camera description, then there is no
overcompensation and the expected result is delivered.

--
Configure bugmail: https://bugs.kde.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the assignee for the bug.
_______________________________________________
Digikam-devel mailing list
[hidden email]
https://mail.kde.org/mailman/listinfo/digikam-devel

[Gilles Caulier-4]

https://bugs.kde.org/show_bug.cgi?id=284708


Gilles Caulier <[hidden email]> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |[hidden email]
          Component|Image Editor                |Lens Distortion
            Product|digikam                     |digikamimageplugins




--
Configure bugmail: https://bugs.kde.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the assignee for the bug.
_______________________________________________
Digikam-devel mailing list
[hidden email]
https://mail.kde.org/mailman/listinfo/digikam-devel

[Roman I Khimov]

https://bugs.kde.org/show_bug.cgi?id=284708

Roman I Khimov <[hidden email]> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Depends on|                            |312764

--
You are receiving this mail because:
You are the assignee for the bug.
_______________________________________________
Digikam-devel mailing list
[hidden email]
https://mail.kde.org/mailman/listinfo/digikam-devel

[Gilles Caulier-4]

https://bugs.kde.org/show_bug.cgi?id=284708

Gilles Caulier <[hidden email]> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
   Version Fixed In|                            |3.0.0
         Resolution|---                         |FIXED
      Latest Commit|                            |http://commits.kde.org/digi
                   |                            |kam/8b3eb6f0b498ae11729e088
                   |                            |0e7ac0673b2dd2bd8

--- Comment #1 from Gilles Caulier <[hidden email]> ---
Git commit 8b3eb6f0b498ae11729e0880e7ac0673b2dd2bd8 by Gilles Caulier.
Committed on 07/01/2013 at 11:16.
Pushed by cgilles into branch 'master'.

Apply patch #76254 from Roman I Khimov about lensfun interface which don't
mangle cropFactor if it's set.
This behaviour was introduced by polish commit
bebef401e147a00f859cb81774f8498a0623eee5.
With this branch present we always get cropFactor of
-1.0 in LensFunFilter::filterImage() and given that lensfun library just uses
crop factor of 1 which leads to obviously wrong calculations for cropped
cameras.
Related: bug 312764, bug 253941, bug 266204, bug 267613, bug 281783
FIXED-IN: 3.0.0
CCMAIL: [hidden email]

M  +0    -4    libs/dimg/filters/lens/lensfuncameraselector.cpp

http://commits.kde.org/digikam/8b3eb6f0b498ae11729e0880e7ac0673b2dd2bd8

--
You are receiving this mail because:
You are the assignee for the bug.
_______________________________________________
Digikam-devel mailing list
[hidden email]
https://mail.kde.org/mailman/listinfo/digikam-devel

[Gilles Caulier-4]

https://bugs.kde.org/show_bug.cgi?id=284708

Bug 284708 depends on bug 312764, which changed state.

Bug 312764 Summary: [patch] Crop factor always set to -1.0 in lens correction
https://bugs.kde.org/show_bug.cgi?id=312764

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|---                         |FIXED

--
You are receiving this mail because:
You are the assignee for the bug.
_______________________________________________
Digikam-devel mailing list
[hidden email]
https://mail.kde.org/mailman/listinfo/digikam-devel

[Gilles Caulier-4]

https://bugs.kde.org/show_bug.cgi?id=284708

--- Comment #2 from Gilles Caulier <[hidden email]> ---
Git commit 613d004121682d122e9ea7fd9041a7bbc49acb89 by Gilles Caulier.
Committed on 07/01/2013 at 11:34.
Pushed by cgilles into branch 'master'.

Apply patch #76256 from Roman I Khimov to use crop factor from camera, not from
lens data.
Lens crop factor in DB only tells us which crop factor was used for lens
calibration data, but it has nothing to do with shots made on random user's
camera. So the default behaviour should be to use camera's crop factor and only
fallback to lens data if there in no data present for camera. As "this should
not happen" it's appropriate to spit out some debug message in this case.

Ref: http://lensfun.berlios.de/manual/el_lens.html
Ref: http://lensfun.berlios.de/manual/el_camera.html
Related: bug 312766, bug 312764, bug 253941, bug 266204, bug 267613, bug 281783
FIXED-IN: 3.0.0
CCMAIL: [hidden email]

M  +2    -1    libs/dimg/filters/lens/lensfuncameraselector.cpp
M  +1    -1    libs/dimg/filters/lens/lensfuniface.cpp

http://commits.kde.org/digikam/613d004121682d122e9ea7fd9041a7bbc49acb89

--
You are receiving this mail because:
You are the assignee for the bug.
_______________________________________________
Digikam-devel mailing list
[hidden email]
https://mail.kde.org/mailman/listinfo/digikam-devel

[Gilles Caulier-4]

https://bugs.kde.org/show_bug.cgi?id=284708

--- Comment #3 from Gilles Caulier <[hidden email]> ---
Git commit 70cf9beaac9996c219f988d8ae74d75dc253c0ad by Gilles Caulier.
Committed on 07/01/2013 at 11:39.
Pushed by cgilles into branch 'master'.

Apply patch #76255 from Roman I Khimov to don't pass crop factor as scale
factor to lensfun.

Sixth parameter to Initialize() is actually a scale factor which has nothing
in common with crop factor. I think it's safe to assume that we want no
scaling from lensfun and thus use the value of one.

Ref: http://lensfun.berlios.de/manual/structlfModifier.html
Related: bug 312765, bug 312764, bug 253941, bug 266204, bug 267613, bug 281783
FIXED-IN: 3.0.0
CCMAIL: [hidden email]

M  +1    -1    libs/dimg/filters/lens/lensfunfilter.cpp

http://commits.kde.org/digikam/70cf9beaac9996c219f988d8ae74d75dc253c0ad

--
You are receiving this mail because:
You are the assignee for the bug.
_______________________________________________
Digikam-devel mailing list
[hidden email]
https://mail.kde.org/mailman/listinfo/digikam-devel

[bugzilla_noreply]

https://bugs.kde.org/show_bug.cgi?id=284708

[hidden email] changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|Lens Distortion             |Tool-LensDistortion
            Product|digikamimageplugins         |digikam

--
You are receiving this mail because:
You are the assignee for the bug.
_______________________________________________
Digikam-devel mailing list
[hidden email]
https://mail.kde.org/mailman/listinfo/digikam-devel