It is mentioned in the paper that Lcls and Lobj in the detection task use focal loss, but this is not the case in the code.

[lss0510]

in the code loss.py, line 195: gamma = cfg.LOSS.FL_GAMMA if gamma > 0: BCEcls, BCEobj = FocalLoss(BCEcls, gamma), FocalLoss(BCEobj, gamma) but in the code default.py, line 39: _C.LOSS.FL_GAMMA = 0.0 Following the code above, Lcls and Lobj are still BCELoss.

[xiaolu123123]

没开启