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favyen / uns20

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Question about the Hungarian Algorithm Implementation #4

Open fedyhajali opened 2 years ago

fedyhajali commented 2 years ago

Hi @uakfdotb,
Below I quote what is reported in the paper.

"On intermediate frames, we apply the Hungarian method on M(0,k) to match detections in Dk with tracks, updating each track with the matched detection (if any)."

I would ask if get_recur_sel() function, together with tf.gather(), represents the Hungarian algorithm implementation.

https://github.com/favyen/uns20/blob/510833a221f891d638d21f4606fb88deae3a98dd/model.py#L366-L381 https://github.com/favyen/uns20/blob/510833a221f891d638d21f4606fb88deae3a98dd/model.py#L456-L466

uakfdotb commented 2 years ago

Yes, this is the part that matches detections with track prefixes during training. It is not the Hungarian algorithm but an approximation in this implementation since doing the bipartite matching is more complex and unnecessary.