进入
mmdetection/mmdet/models/dense_heads/base_dense_head.py
修改前

if getattr(self.loss_cls, 'custom_cls_channels', False):scores = self.loss_cls.get_activation(cls_score)
elif self.use_sigmoid_cls:scores = cls_score.sigmoid()
else:# remind that we set FG labels to [0, num_class-1]# since mmdet v2.0# BG cat_id: num_classscores = cls_score.softmax(-1)[:, :-1]

修改后（第一个if语句注释其中条件，条件设置为False）

if False: # getattr(self.loss_cls, 'custom_cls_channels', False):  # Change made herescores = self.loss_cls.get_activation(cls_score)
elif self.use_sigmoid_cls:scores = cls_score.sigmoid()
else:# remind that we set FG labels to [0, num_class-1]# since mmdet v2.0# BG cat_id: num_classscores = cls_score.softmax(-1)[:, :-1]