Tracking on 1fps camera

[ghost]

Hi,

Thanks a lot for your work, very helpful. It's work great on some videos. I am working on 1fps camera and its doesn't work well, as expected. Persons create a new id at each footstep. I think it's due to the very low fps, person look like teleporting. Maybe the velocity model of the kalman filter sould be changed. Do you know how can i manage this by modifying some value ? What the mean of nms_max_overlap and nn_budget ?

Thanks

[Yakirbe]

following

[louxy126]

same question

[BabuTango]

Any ideas @nwojke

[nwojke]

Sorry for the late reply.

• nms_max_overlap controls non-maxima suppression: If two detection bounding boxes overlap more than this value, the tracker will only keep the one with higher detector confidence and ignore the other. Thus, this parameter is quite unrelated to camera frame rate.
• nn_budget control how many appearance features each track carries for the comparison in Eq. 3 of the paper. A larger budget means that the track can potentially "remember" more appearance variation.

Maybe it is a good idea to comment in this code and have a look at the Kaman filter gates. If the gates are too small (bounding box center is never inside of the corresponding ellipse) than you need to increase motion model uncertainty here (and following line).