could I set a loss for neck?

[YilanWang]

I want to set a special auxiliary loss for neck features, however I don't read all mmcls repo. By the experiences in using mmdet, it seemed like I need to set many heads for rpn(rpn_head) and rcnn(roi_head).
Could you tell me, is it useful for setting a loss for neck? Many thanks~~~

[Ezra-Yu]

Yes, your intuition is right, just modify the loss in the model.head such as neck in resnet

[YilanWang]

Yes, your intuition is right, just modify the loss in the model.head such as neck in resnet

many thanks for reply, so could I set 2 heads for a net? If so, should I implement it like
head=dict( type='LinearClsHead', xxx), dict( type='yyy') )
or other foramt?
If not, could you tell me how to implement a auxiliary loss?
Many many thanks~~

[Ezra-Yu]

The master/dev branch does not yet support this feature, you can refer to this mutil task PR.