Public bug reported:
Binary package hint: gimp
Gimp offers various ways to resize images, such as:-
1) Tools->Transform Tools->Scale (Shift+T)
2) Layer->Scale Layer
3) Image->Scale Image
4) Toolbox->Scale Tool
All but the first offer a choice of interpolation method. Unfortunately,
images resized using the Shift+T pop-up tool are noticeably inferior in
detail to those produced by the other approaches.
This can be reproduced for example by these steps:-
- select a large 3:4 ratio region from a 2Mpixel digital photo
- copy the region and create a new image from the clipboard
- resize the new image to 240x320 using method 1) above
- save as a JPEG
- undo the resizing and then resize using one of the other methods
- save as another JPEG
- compare side by side at 100% zoom.
Just now I've found Preferences->Tool Options->Scaling->Default
Interpolation which is set to "Cubic" but for some reason is not being
applied.
Tested version: 2.6.7-1ubuntu1.1 on Xubuntu Karmic.
** Affects: gimp (Ubuntu)
Importance: Undecided
Status: New
** Tags: detail gimp scale
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Shift+T scaling offers no interpolation... blurry
https://bugs.launchpad.net/bugs/533832
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