softmax based version for multiclass case about focal-loss

[liuyuisanai]

Not yet. However you can easily implement that by combining the second item in my code to softmaxLoss layer.

[zimenglan-sysu-512]

hi @cocorecoco,

you can see my implementation using softmax function. https://github.com/zimenglan-sysu-512/Focal-Loss

[liuyuisanai]

@zimenglan-sysu-512 Thanks for your implementation! I'll ref your code in my readme.

[zimenglan-sysu-512]

hi @ScienceFans,

thanks for your kindness. can u give more details about how u implement the bp? your code is optimized for speed, but look more complicated.

thanks again.

[liuyuisanai]

@zimenglan-sysu-512 Please refer to issue#3 for my inference.