darktable-org / darktable-org/rawspeed
Bad columns in left optical black area Canon EOS 2000D
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- Dominant language
- C++
- Stars
- 456
- Forks
- 147
- PR merge metrics
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Description
A darktable user had an issue with greenish raw files due to wrong black level. The culprit was 4 bad columns in the left optical black area.
Changing from 0 to 5 will solve the issue.
I also downloaded a Canon EOS 2000D raw file from raw.pixls.us. All the columns there are fine so this may only be an issue with a few batches.
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
No file or test is identified; start by locating the Canon EOS 2000D handling and the optical-black column value. Change the affected value from 0 to 5, then validate it with a Canon EOS 2000D RAW sample and confirm the black level and green cast are corrected.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- cpp
- Domain
- computer-vision
- Issue type
- Bug
- Difficulty
- 2/5
- Estimated time
- 1-3 hours
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 48/100