mapillary / mapillary/OpenSfM

Obtaining a more crisp point cloud

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Python
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Description

I am having difficulty with the SFM. It is always generating a fuzzy looking point cloud across multiple datasets. I have attached one example.
3D_point_cloud_buddha

It is based on an orbit shot for a sequence of images for which one image looks as follows:
output_0002_bk_rmvd_with_prompt_1

I am not able to easily find information to make this point cloud come out looking nicer. I have tried increasing the number of frames and the camera has relatively high resolution. I can clean up any motion blur a bit more with some of the shots. However, when trying on other datasets where there is a significant number of frames and no motion blur, this fuzzy point cloud issue persists. Can someone suggest a way to fix this?

There are too many parameters in this config file: https://opensfm.org/docs/_modules/opensfm/config.html. I am doing some checking but not totally sure which adjustment is going to make the difference yet.

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by reading opensfm/config.html and reproducing the fuzzy point cloud with the reported orbit sequence and image datasets. Compare the reconstruction-related parameters and document a verified setting or workflow that produces a sharper cloud; no specific test or source entry point is named in the issue.

Written by the indexing model from the issue text.

Assessment

Tech stack
python
Domain
computer-vision
Issue type
Bug
Difficulty
5/5
Estimated time
Over a week
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
25/100

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