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Bug 755092 - Unsharp Mask filter creates a 1px brighter border
Unsharp Mask filter creates a 1px brighter border
Status: RESOLVED DUPLICATE of bug 755703
Product: GEGL
Classification: Other
Component: operations
git master
Other Linux
: Normal normal
: ---
Assigned To: Default Gegl Component Owner
Default Gegl Component Owner
Depends on:
Blocks:
 
 
Reported: 2015-09-16 06:52 UTC by demiun
Modified: 2015-10-12 21:59 UTC
See Also:
GNOME target: ---
GNOME version: ---

Attachments
Result (19.12 KB, image/jpeg)
2015-09-16 06:52 UTC, demiun 		Details

Description demiun 2015-09-16 06:52:34 UTC 
Created attachment 311430 [details]
Result

The Unsharp Mask filter has been modified a few month ago I think. I find it produced slightly cleaner results before. But more importantly there is this bug now, if you apply the filter to a layer that doesn't have an alpha channel, the pixels at the border will get brighter.

To reproduce :
1. Open this image: https://lutris.net/media/games/banners/ultima-IV.jpg
2. Zoom in the top left corner
3. Apply the Unsharp Mask filter with default params

Result in the attachment.

Using GIMP 2.9.1
Comment 1 Michael Natterer 2015-09-16 09:27:10 UTC 
Indeed. Moving to GEGL because that's where the operation lives now.
Comment 2 Michael Natterer 2015-10-12 21:59:35 UTC 
This got fixed by changing the defaults on the underlying
gaussian blur operation.

*** This bug has been marked as a duplicate of bug 755703 ***