Bug 423094

Summary:	Edge detection filter is broken when radius is set above 5.66
Product:	[Applications] krita	Reporter:	Tyson Tan <tysontanx>
Component:	Filters	Assignee:	Krita Bugs <krita-bugs-null>
Status:	RESOLVED DUPLICATE
Severity:	normal	CC:	ahab.greybeard, griffinvalley
Priority:	NOR
Version First Reported In:	4.3.0-beta2
Target Milestone:	---
Platform:	Other
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description Tyson Tan 2020-06-17 09:43:07 UTC

Edge detection filter is acting not as expected then its radius is set to anything above 5.66.

1) Create a new image
2) Create a empty layer
3) Draw something with Basic-5 Size preset
4) Filter --> Edge Detection --> Edge Detection
5) Default radius is 1.00, the preview image turns black.
6) Set radius to 5.66, the preview image is still working as intended
7) Increase radius to 5.67, the preview image jumps to white.

Comment 1 Ahab Greybeard 2020-06-17 16:45:07 UTC

I can confirm this for the 4.3.0 beta-2 appimage and the 15 Jun 5.0.0 prealpha (git 6dc22af) appimage except for the details as follows:

The point at which the preview image jumps to white varies depending on the size of the canvas:

 5.67 px at 1024 x 1024 canvas size
11.34 px at 2048 x 2048 canvas size
22.67 px at 4096 x 4096 canvas size

Comment 2 wolthera 2020-07-28 11:25:25 UTC


*** This bug has been marked as a duplicate of bug 413317 ***