Inlier matches after BA

[jesusb...@gmail.com]

Hi everyone,

I saw in the documentation that *inlier_matches* in the database stores the list of matches used in reconstruction (after *geometric verification*).

I was curious, though, what should be the preferred way to get the list of remaining inlier correspondences *after* the final global BA step? That is, after performing e.g. filtering on observations with large reprojection errors.

Best regards,

- Jesus Briales

[Johannes Schönberger]

Hi,

You can extract the correspondences from the sparse reconstruction file, when you select ``File > Export`` in the GUI or the ``--export_path`` option in the command line. Then you can read the output with Python or Matlab and either iterate over the observations in the ``images.bin/txt`` or ``points.bin/txt``. See here for more information on the data format: https://colmap.github.io/format.html

Let me know if you have questions.

Cheers,
Johannes

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