looking for in depth explanation/documentation on all options

[Andre]

Dear all, I recently downloaded COLMAP and joined this group. I have a few questions, some of them very trivial probably...

1) When I save and close a project after sparse reconstruction, then I re-open but I do not see the sparse reconstruction anymore, like it was not saved.

2) I have seen that the parameter max_image_size in dense reconstruction options > stereo must be set to something around 500 not to crash. Why? What is the meaning of this parameter?

3) More in general, where I can find a complete and detailed list of all parameters and options? I cannot find it in the documentation.

Thanks very much!

Kind regards,

andrea

[xied...@gmail.com]

1) Have you tried export and import sparse model as images.bin, cameras.bin, and points3D.bin? These formats are described here: https://colmap.github.io/format.html

2) Image is downsampled if one dimension(height or width) is greater than max_image_size. Your computer crashed because of insufficient memory, when the image size is greater than 500.

3) Full list of options will be shown if you run colmap <module> --help.  Detailed descriptions of the parameters can be found in code comments or the author's paper.

在 2018年6月12日星期二 UTC+8下午11:46:00，Andre写道：

[Andre]

THANKS!

So for 1) I have to use import/export to save models.

2) and 3) are now clear.

Best,

andrea

[Johannes Schönberger]

1. Yes, you have to import/export the models. The project is only to save your settings and selected paths.

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[Andre]

Hello, sorry for insisting... I would not if I wasn't really interested.

With colmap <module> --help you get a list of options and parameters (the same as in the GUI?) but no explanation on their meaning.

And where do I have to look for comments to code? In the GITHUB repository in https://github.com/colmap/colmap/tree/dev/src, and then in each specific function?

Finally, there are three papers in 2016 by Johannes Schönberger. Which one?

Thank you very much!

Best regards,

andrea

[xied...@gmail.com]

Comments in specific struct like XXXOptions in the src codes.

The sfm paper for sfm options, the mvs paper for mvs options.

Assuming that you have already learned the basics of 3D computer vision.

在 2018年6月14日星期四 UTC+8下午5:55:53，Andre写道：