Margin Loss

[lovekittynine]

Hi, thanks for your great work! I have a question about Margin loss! Duration the training process of Identity Representation, margin loss is used to prevent the obtained mean face far from face image. But, in the training process of Expression Representation, why not use margin loss for neural face? In my opinion, both process are somewhat similar.

[JiaRenChang]

Hi, @lovekittynine :
We don't use margin loss in training expression representation because that the input faces contain various poses and expression.
In contrast, the head pose of input face in training identity representation are always front.
The margin loss constrains the generated mean face which to also be front.

Jia-Ren