Camera Parameter and Object Detection

[wintermute]

Have couple of questions regarding API v4.

1. In the image camera parameters, is this the actual focal length [1] in mm or is it the focal ratio (like in the OpenSFM docs)? If focal ratio, how was this calculated?

2. Are object detections available in v4 similar to the way they were in the past [2]? I saw that point features and traffic signs are available, but have not come across object detections so far. Wanted to make sure I was not overlooking them.

Current references:
[1] Mapillary
[2] https://help.mapillary.com/hc/en-us/articles/115000967191-Object-detections

[wintermute]

Thanks a ton! I was kind of leaning towards they meant focal ratio. Their use of “focal length” in the documentation threw me off.

Interesting. I may have to think about how to use that data when integrating the imagery for comparison into COLMAP.

[wintermute]

To be more specific (and hopefully avoid confusion) I was referring to the “camera_parameters” metadata described in the Mapillary API documentation (see screenshot). Wanted to post this to be more explicit about what I was referring to in regards to “focal length”.

Mapillary