After an evaluation, GNOME has moved from Bugzilla to GitLab. Learn more about GitLab.
No new issues can be reported in GNOME Bugzilla anymore.
To report an issue in a GNOME project, go to GNOME GitLab.
Do not go to GNOME Gitlab for: Bluefish, Doxygen, GnuCash, GStreamer, java-gnome, LDTP, NetworkManager, Tomboy.
Bug 743289 - "Smooth images when zoomed out" has little effect on large, noisy photos
"Smooth images when zoomed out" has little effect on large, noisy photos
Status: RESOLVED DUPLICATE of bug 665897
Product: eog
Classification: Core
Component: image viewer
unspecified
Other Linux
: Normal normal
: ---
Assigned To: EOG Maintainers
EOG Maintainers
Depends on:
Blocks:
 
 
Reported: 2015-01-21 11:16 UTC by edward.coffey
Modified: 2015-02-10 18:30 UTC
See Also:
GNOME target: ---
GNOME version: ---

Attachments
Example images demonstrating the issue. (509.73 KB, application/gzip)
2015-01-21 11:16 UTC, edward.coffey 		Details

Description edward.coffey 2015-01-21 11:16:23 UTC 
Created attachment 295082 [details]
Example images demonstrating the issue.

The smoothing algorithm used for the "Smooth images when zoomed out" option isn't effective for large, noisy photographic images, making them appear noisier than expected for a given scale.

The attached images show the effect with "Smooth images when zoomed out" selected, not selected, and a version created in GIMP using linear interpolation. The GIMP image shows the expected reduction in noise, whereas the smoothed EOG image isn't much less noisy than the unsmoothed one.
Comment 1 Felix Riemann 2015-02-10 18:30:53 UTC 
That's a known problem we have with cairo's filter selection.
---
Thanks for taking the time to report this.
This particular bug has already been reported into our bug tracking system, but please feel free to report any further bugs you find.

*** This bug has been marked as a duplicate of bug 665897 ***