| Summary: | Preview uses low quality interpolation | ||
|---|---|---|---|
| Product: | [Applications] digikam | Reporter: | DrSlony <bugs> |
| Component: | Preview-Image | Assignee: | Digikam Developers <digikam-bugs-null> |
| Status: | RESOLVED FIXED | ||
| Severity: | normal | CC: | arnolda747, bugs, caulier.gilles, cfeck, robert.zeller, samuel.gilbert, vincent.barberet |
| Priority: | NOR | ||
| Version: | 4.2.0 | ||
| Target Milestone: | --- | ||
| Platform: | Gentoo Packages | ||
| OS: | Linux | ||
| Latest Commit: | Version Fixed In: | 4.3.0 | |
| Sentry Crash Report: | |||
| Attachments: |
Screenshot showing image preview
It should look like this bad quality preview |
||
Created attachment 88171 [details]
It should look like this
I think the problem is relevant to #337231 *** This bug has been marked as a duplicate of bug 337231 *** Are you sure? I skimmed through that bug report. Seems to me if these bugs are related then I would see a jagged preview even when no scaling is performed, i.e. when the image fits inside the digiKam preview space, yet that's not the case - when no scaling is performed the preview looks good. Yes, I think both phenomena (grainy preview & artificial patterns on image parts with regular repeating structures like e.g. brick walls) are related. I am encountering both on DK 4.2., when preview-full-size-of-image is set to true. This was not the case in DK 4.1 The only modification that could affect preview is support for Macbook's retina displays. Developer who proposed patch will wrap code for Mac OS, just wait. Created attachment 88191 [details]
bad quality preview
Comment on attachment 88191 [details]
bad quality preview
Here is a zoom on the issue I'm facing. It seems similar to other attachments. Please tell me which info is needed to troubleshoot this issue.
See comment 21 from bug 337231 for the future solution : https://bugs.kde.org/show_bug.cgi?id=337231#c21 Gilles Caulier Git commit 2e03ccdb9319e40b8e40cabea569c8656053171f by Gilles Caulier. Committed on 17/08/2014 at 10:24. Pushed by cgilles into branch 'master'. apply new patch #88275 from Axel Arnold about Retina display support will be only managed under OSX, not Linux or Windows. Related: bug 337231 M +7 -0 CMakeLists.txt M +3 -0 digikam/utils/config-digikam.h.cmake.in M +5 -0 libs/widgets/graphicsview/graphicsdimgitem.cpp M +5 -0 utilities/imageeditor/widgets/imagepreviewitem.cpp M +5 -1 utilities/slideshow/slideshow.cpp http://commits.kde.org/digikam/2e03ccdb9319e40b8e40cabea569c8656053171f Great! Now when is 4.2.1 out? :) Not 4.2.1, but 4.3.0. Look release plan : https://www.digikam.org/about/releaseplan Gilles Caulier Thank you. Thank you! |
Created attachment 88170 [details] Screenshot showing image preview I haven't noticed this before so it's possibly a new bug. digiKam 4.2.0 uses a low quality interpolation algorithm resulting in horrible previews.