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Bug #12189

16 bit PPM files look like pure noise

Added by Tobias Jakobs 12 months ago. Updated 8 months ago.

Status:
Fixed
Priority:
Low
Assignee:
-
Category:
General
Target version:
2.6.0
Start date:
05/08/2018
Due date:
% Done:

100%

Affected Version:
2.4.3
System:
Ubuntu
bitness:
64-bit
hardware architecture:
amd64/x86

Description

16 bit PPM files look like pure noise.
I used the gpr_tools from here: https://github.com/gopro/gpr to create the PPM file from an GoPro Raw image.

GOPR0020.PPM (4.29 MB) Tobias Jakobs, 05/08/2018 12:22 AM

Bildschirmfoto vom 2018-05-07 23-24-32.png - Screenshot of the image in dt (2.58 MB) Tobias Jakobs, 05/08/2018 12:25 AM

History

#1 Updated by Roman Lebedev 12 months ago

Most likely because that "PPM" is still-mosaiced sensor dump, just out of gopro raw container.
It would be better to convert it to dng proper.

#2 Updated by Tobias Jakobs 12 months ago

1. It opens fine in Gimp 2.10. (Just 2x green, but that's easy to fix.)
2. Yes the DNG works fine.

#3 Updated by Roman Lebedev 12 months ago

Tobias Jakobs wrote:

1. It opens fine in Gimp 2.10. (Just 2x green, but that's easy to fix.)

The Bayer CFA pattern is Red Green Green Blue, so if there is 2x green, if anything, that doesn't disprove my theory :)

2. Yes the DNG works fine.

#4 Updated by Tobias Ellinghaus 11 months ago

  • % Done changed from 0 to 100
  • Status changed from New to Fixed

#5 Updated by Roman Lebedev 8 months ago

  • Target version set to 2.6.0

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