OpenDroneMap / OpenDroneMap/ODM
Feature request: option to disable OpenMVS point cloud filter (filtering by visibility)
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- Dominant language
- Python
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Description
I noticed the OpenMVS point cloud filter might have a problem, how it determines the point visibility cannot handle when seeing a plane from side. I had a dataset that the majority of good points on a plane get removed.
Before filter
After filter
I believe the case like the red camera is causing this issue, when seeing a plane from side, every closer point occludes further points, which leads to unpredictable behavior in the visibility filtering algorithm. This might also cause points on the wall of a building removed. I can share the intermediate openmvs files if needed (scene_dense.mvs), images won't be allowed.
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
Start by locating the OpenMVS point-cloud visibility filter and the option plumbing that controls it; the issue does not name files or tests. Done means users can disable this filtering step and retain the affected points, with behavior checked against the reported side-on-plane case.
Written by the indexing model from the issue text.
Assessment
- Domain
- computer-vision
- Issue type
- Feature
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 35/100