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Bug #11694

Artifacts on edges in tonemapping module

Added by Paolo Astengo about 1 month ago. Updated about 1 month ago.

Status:
New
Priority:
Low
Assignee:
-
Category:
Darkroom
Target version:
-
Start date:
08/15/2017
Due date:
% Done:

0%

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

Description

Hi,

using tonemapping I'm encountering an issue on the edges (see attached images). I didn't fount any possibility to overcome it.

DSC_0175_01.jpg (216 KB) Paolo Astengo, 08/15/2017 02:38 PM

DSC_0175.NEF.xmp (3.96 KB) Paolo Astengo, 08/15/2017 02:38 PM

Schermata da 2017-08-15 13-35-57.png (3.64 MB) Paolo Astengo, 08/15/2017 02:40 PM

DSC_0175.NEF (11 MB) Paolo Astengo, 08/15/2017 02:42 PM

History

#1 Updated by Roman Lebedev about 1 month ago

  • Status changed from New to Triaged
  • Assignee set to Roman Lebedev
  • % Done changed from 0 to 20

The raw crop is incorrect. I'll fix this.

#2 Updated by Roman Lebedev about 1 month ago

  • Assignee deleted (Roman Lebedev)

Roman Lebedev wrote:

The raw crop is incorrect. I'll fix this.

Fixed.
As for the edges in the middle of the screen, i don't really know.
Maybe try local-laplacian based stuff - fusion in basecurve, local contrast

#3 Updated by Paolo Astengo about 1 month ago

Thank you Roman,
I've tried fusion, local contrast with highlight and shadows, but I cannot reach the same result as tonemapping, especially on clouds.

#4 Updated by Roman Lebedev about 1 month ago

Paolo Astengo wrote:

Thank you Roman,
I've tried fusion, local contrast with highlight and shadows, but I cannot reach the same result as tonemapping, especially on clouds.

I was talking about e.g. http://www.darktable.org/2016/08/compressing-dynamic-range-with-exposure-fusion/

#5 Updated by Paolo Astengo about 1 month ago

Just to add some information (I hope this can be useful in some way)

Starting from the original image (zooming at 200% on the rightmost cross on the top of the roof), you can see the strange effect of the "chromatic aberration" module.

#6 Updated by Roman Lebedev about 1 month ago

  • Status changed from Triaged to New
  • % Done changed from 20 to 0

(forgot to unset the status)

#7 Updated by Roman Lebedev about 1 month ago

Paolo Astengo wrote:

Just to add some information (I hope this can be useful in some way)

Starting from the original image (zooming at 200% on the rightmost cross on the top of the roof), you can see the strange effect of the "chromatic aberration" module.

That is probably #8318

#8 Updated by Paolo Astengo about 1 month ago

I think you're right.

The bad edges appear only in raw images, not in jpg files. I've taken a look on rawtherapee: it uses a slider for "edge stopping" and it works very well. A different algorithm?

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