mapillary / mapillary/OpenSfM

Inquiry: Hemispherical Images from cameras like Parrot Bebop/Bebop2

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sfm-reconstruction
Dominant language
Python
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Description

These sensors are nominally 180deg vert x 180deg horiz and are as such, neither really fisheye nor spherical cameras.

Does OpenSFM have a lens model that can accommodate this type of data? Is it more appropriate to force spherical over fisheye for these images in the meantime?

Forcing brown, auto, spherical, fisheye all lead to really incorrect reconstruction.

Example dataset:
https://testhub1.dronedb.app/r/W6oody/bluebell_Feb_21_85m_with_gcp

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 reviewing OpenSfM's supported lens models and the reconstruction path used for the linked Bluebell dataset. Compare the brown, auto, spherical, and fisheye results against the dataset's hemispherical camera characteristics; done means establishing whether an existing model is appropriate or defining the required model behavior.

Written by the indexing model from the issue text.

Assessment

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

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