exiawsh / StreamPETR

[ICCV 2023] StreamPETR: Exploring Object-Centric Temporal Modeling for Efficient Multi-View 3D Object Detection

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Always topk_proposals == num_propagted ?

Slonna opened this issue · comments

Hi, I noticed that the value of num_propagated is always set to be same with topk_proposals in all the config file.
Is this deliberate or random?
And I think that in this way, the memory_bank will not store any output of previous frame because all of them are propagated.
The memory_bank is more like a hidden state?
Do I understand correctly?

The num_propaged can be different with topk_proposals. You can modify the hyper parameters.
The memory bank save 4 frames query features. In our setting, only the queris from the last frame are propagated. The others use global attentiom to interative with current queries.

I re-read the code and understand it now. I misunderstood it before. Thanks for your reply.