How can I disable image selection or adjust the criteria for non-deterministic results.

cdcseacave / openMVS

open Multi-View Stereo reconstruction library

http://cdcseacave.github.io

GNU Affero General Public License v3.0

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How can I disable image selection or adjust the criteria for non-deterministic results. #542

Open huikang opened 4 years ago

huikang commented 4 years ago

Hi, I am using openMVS as a pre-step to a 3D reconstruction process. However, the image selection results enacted by openMVS seems non-derterministic.

That is sometimes the results of openMVS is an empty set. Then I run the process again on the same set of images, it selects the right set of images.

My question is that how can I eliminate this non-derterministic results. Thanks.

cdcseacave commented 4 years ago

There is no such thing coded in OpenMVS. It should generate always the same image sets. The only non-deterministic reason is using multi-thread, you can disable it using --max-threads 1. If you get anything but the same image sets at each run, then there is a problem in how you call it, etc, or a bug I never encountered before.

huikang commented 4 years ago

@cdcseacave , thanks for your response. Just two follow up questions

Do you happen to know what is the default value of --max-threads? Or if max-threads is unset, it will set to some value based on the system.
Do you know why sometimes the selected image is 0, while sometimes it picks the correct images? Will --max-threads 1 help to fix it?

Preparing images for dense reconstruction completed: 46 images (2s889ms)
Selecting images for dense reconstruction completed: 0 images (18ms)

Thanks.