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seebk / GIMP-Lensfun

GIMP plugin for correcting lens distortion using the lensfun library and database
http://seebk.github.io/GIMP-Lensfun/
GNU General Public License v3.0
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Wrong correction #21

Open antilet opened 7 years ago

antilet commented 7 years ago

Using lensfun with pictures from Canon Powershot S95 to correct the distorsion - the result is worse then the original, the correction is far to much.

Wenn man mit Lensfun versucht die Tonnenverzeichnung in Bildern einer Canon Powershot S95 zu korrigieren, ist das Ergebnis schlimmer als das Original. Die Korrektur ist viel zu heftig. Aus konkaven Linien werden konvexe. Probiert mit dem aktuellsten Gimp-PlugIn unter Lubuntu 17.04. Wenn ich die Informationen aus der Data-Datei für lensfun richtig interpretiere, werden auch Parameter von PTLens verwendet - kann das sein? Mit PTLens klappt die Korrektur.

seebk commented 7 years ago

The test images I have from a Canon S95 look fine. Can you upload an example image? Did you crop the image before applying the correction? GimpLensfun should always be applied as early as possible and before any cropping and scaling of the original image.

Otherwise, it may be the case that the Lensfun profile is not the most accurate one. Please report to the Lensfun project itself (http://lensfun.sourceforge.net/) where you can also find information about the process to create lens profiles.

antilet commented 7 years ago

If I remember correctly, the images are untouched before the correction. Where should i upload the images? Any filehoster or some specific place or right here?