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Bug #11763

Exported image looks different than darkroom

Added by Pedro Pimenta 11 days ago. Updated 7 days ago.

Status:
Confirmed
Priority:
Low
Assignee:
-
Category:
Lighttable
Target version:
-
Start date:
10/08/2017
Due date:
% Done:

10%

Affected Version:
2.2.5
System:
other GNU/Linux
bitness:
64-bit
hardware architecture:
amd64/x86

Description

It does not matter the export settings (this is happening even with 1:1 copy), the output is completely different from the input

20170927_0006.CR2.xmp (15.5 KB) Pedro Pimenta, 10/08/2017 09:14 AM

20170927_0006.CR2.pp3 (9.91 KB) Pedro Pimenta, 10/08/2017 09:14 AM

20170927_0006.CR2 (25.4 MB) Pedro Pimenta, 10/08/2017 09:18 AM

History

#1 Updated by Tobias Ellinghaus 11 days ago

I sure hope that the output looks different than the input, you are using a bunch of modules after all.

#2 Updated by Pedro Pimenta 10 days ago

Tobias Ellinghaus wrote:

I sure hope that the output looks different than the input, you are using a bunch of modules after all.

Im sorry, i've not expressed myself clear. The thing is that the exported result is very different from the final output in the editing pipeline, and I dont know why. Im struggling to export this specific photograph in a long time.

#3 Updated by Žilvinas Žaltiena 10 days ago

Pedro Pimenta wrote:

Tobias Ellinghaus wrote:

I sure hope that the output looks different than the input, you are using a bunch of modules after all.

Im sorry, i've not expressed myself clear. The thing is that the exported result is very different from the final output in the editing pipeline, and I dont know why. Im struggling to export this specific photograph in a long time.

Are you saying you are seeing very different image in darkroom and while viewing the exported one? Can you describe the difference. I have tried exporting it and observed only slight color shift (probably because of noise and how downscaling works in the viewer).

#4 Updated by Pedro Pimenta 10 days ago

Žilvinas Žaltiena wrote:

Pedro Pimenta wrote:

Tobias Ellinghaus wrote:

I sure hope that the output looks different than the input, you are using a bunch of modules after all.

Im sorry, i've not expressed myself clear. The thing is that the exported result is very different from the final output in the editing pipeline, and I dont know why. Im struggling to export this specific photograph in a long time.

Are you saying you are seeing very different image in darkroom and while viewing the exported one? Can you describe the difference. I have tried exporting it and observed only slight color shift (probably because of noise and how downscaling works in the viewer).

the contrast, local adjustments, hue, brightness... Everything seems way different than usual.

Take a look: https://imgur.com/a/oR3MA

#5 Updated by Tobias Ellinghaus 8 days ago

  • Status changed from New to Incomplete
  • % Done changed from 0 to 20
  • Subject changed from This specific photograph crashes the export module to Exported image looks different than darkroom

Just a wild guess: Either your image viewer that you are using to look at the exported image isn't color managed, or darktable is using a wrong display profile.
As a first step you could import the exported image into darktable. Does that now look like what the original raw looked like in darkroom?

#6 Updated by Pedro Pimenta 8 days ago

Tobias Ellinghaus wrote:

Just a wild guess: Either your image viewer that you are using to look at the exported image isn't color managed, or darktable is using a wrong display profile.
As a first step you could import the exported image into darktable. Does that now look like what the original raw looked like in darkroom?

No, it looks the same as the jpeg as im seeing it in my image viewer.

#7 Updated by Tobias Ellinghaus 7 days ago

  • Status changed from Incomplete to Confirmed
  • % Done changed from 20 to 10

I think I can confirm your findings. However, even zomming in darkroom mode changes colors already. My guess is that the extreme noise is tricking us in some zoom levels into seeing other colors than there are. Or something else. I didn't dig deeper into this. Maybe you can try to find the one module that is causing the color shift?

#8 Updated by Pedro Pimenta 7 days ago

Tobias Ellinghaus wrote:

I think I can confirm your findings. However, even zomming in darkroom mode changes colors already. My guess is that the extreme noise is tricking us in some zoom levels into seeing other colors than there are. Or something else. I didn't dig deeper into this. Maybe you can try to find the one module that is causing the color shift?

I've made some testing but came to nothing conclusive. With only exposure, white balance and sharpness adjustments I could export it right, but after noise reduction things start to not work anymore. But i've tried to edit it without the noise reducion modules, and still could not get good results. It seems that any major changes, like a Levels adjustment, leads to bad exported results.

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