Geometric verification of manual matches

[jhony]

Hi, I'm wondering if it's possible to perform geometrical verification of raw matches added in the database file.

The idea would be: 1. Run feature extractor; 2. Open the database and add extra keypoints and raw matches; 3. Run Sequential Matching to match sift features found by COLMAP and geometrically verify the extra raw matches.

Would that be possible?

Thanks!

[Johannes Schönberger]

Hi,

 

Yes, this should be easily possible with a little script. Please have a look at scripts/python/database.py for an example how to add/modify/delete entries from the database.

 

Cheers,

Johannes

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[jhony]

Thanks for the quick reply, Johannes.

I added extra keypoints and raw matches in the database with a script. However, when running the sequential matching COLMAP skips the ones I added.

I wonder if there is a way to disable the geometric verification somehow? So I could run the feature extractor + matching (raw only) and then add the extra raw keypoints/matches for later geometric verification.

Cheers.

[Johannes Schönberger]

Please, provide a sequence of commands that you are executing to achieve this, otherwise I don’t understand exactly what you are doing and cannot help. 

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[Digital Naturalism Laboratories]

I am also trying to do this same thing. I have a script like the database.py ones

the new Two view geometries get added well. it even shows them in the database manager. but then when i run reconstruction, it just ignores all those nice matches i added.

[oddw...@gmail.com]

Default settings in an project .ini file ignore two-view image features. Uncheck this option from the UI or modfy it in your project.ini file.

[Digital Naturalism Laboratories]

Im going to try that right now! thank you so much for replying!!! i hope it works out!

[Digital Naturalism Laboratories]

hahah i had been toying with that for months, and just never noticed that. Now my colmap with do a reconstruction (ends with 19,265 points), I can add manual matches to it, and do a reconstruction again with 100,000 extra points i added to two photos in the set, and it successfully runs and ends with 35,268 points. Thanks so much for your help, i will keep playing with this more!

[Digital Naturalism Laboratories]

correction, i added 10,000 extra points (not 100,000) and it then reconstructed with 35,268 which i found interesting