[Digikam-devel] [Bug 152192] resize really bad qualitatively

[Kamil Stepinski]

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http://bugs.kde.org/show_bug.cgi?id=152192         




------- Additional Comments From kamil.stepinski gmail com  2008-03-16 11:26 -------
Guys,

The image resizing quality is _really bad_ in digiKam (I have 0.9.2 installed).
It's so bad that the output is just unacceptable for me. :(

I really think you should add a selection box with a few algorithms (Hermite, Mitchell, Lanczos, etc.) with Lanczos as a default one because it provides the best results.
Currently I'm resizing all pictures with IrfanView (runs well with Wine) and the rest of postprocessing is done in digiKam. It's not the most convenient method but it works.
I think you should consider the current resize quality as a major issue - as it is a tool that is used very frequently.

Here's the link to the example of the resize quality comparison:

http://picasaweb.google.com/kamil.stepinski/Digikam/photo#5178275271094829746

Please observe car window edges.

1 - digiKam 0.9.2 to the left, IrfanView 4.10 to the right
2 - resizing from 5Mpix camera to 800x600, IrfanView is using Lanczos filter, digiKam is using I-don't-know-what.

That's the only major problem I have with digiKam. I think the resize has been working much better in 0.8.x version.

At the end -> Thanks guys for the great piece of software! The applications is really great!