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i made new sampler just like libra sampling in rbbox_head with using rbbox_base_sampler.py and i got lower ap seperatly i used orginal libra sampling in bbox_head but i got lower ap too

seperatly i used orginal BalancedL1Loss in head and got lower ap--------why SmoothL1Loss works better??

why libra sampling and its loss doesnt work better???

tnx for answering @csuhan

These methods may work well on some datasets, while for other datasets, adjusting highper-params are neccesary. I sugguest you to deeply analyse why these trick may help.