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Bug #12349

Local contrast Laplacian : creates strong halos

Added by Aurélien PIERRE 9 months ago. Updated 4 months ago.

Status:
Patch attached
Priority:
Medium
Assignee:
-
Category:
Darkroom
Target version:
Start date:
10/03/2018
Due date:
% Done:

70%

Affected Version:
git master branch
System:
all
bitness:
64-bit
hardware architecture:
amd64/x86

Description

I just noticed on the dev branch that the local contrast module is now producing strong halos along edges, as if the laplacian pyramid were shifted during the process. We get more lightness on the dark part of the edge.

This is only with OpenCL disabled and in the darkroom preview. Exports don't seem to be affected.

Laplacian OFF.png - Laplacian OFF (2.25 MB) Aurélien PIERRE, 10/03/2018 04:59 AM

Laplacian ON.png - Laplacian ON (2.56 MB) Aurélien PIERRE, 10/03/2018 04:59 AM

History

#1 Updated by Aurélien PIERRE 9 months ago

  • Description updated (diff)

#2 Updated by Aurélien PIERRE 6 months ago

That seems to happen only with "-O3" compilation flag (--build-type Release). To be confirmed.

#3 Updated by Aurélien PIERRE 4 months ago

  • % Done changed from 0 to 70
  • Status changed from New to Patch attached

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