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Purpose of doing (-99999999.) * (1 - is_pos) in circle loss
See original GitHub issueHi,while I am reading the code of circle loss ,everything makes sense to me until this line ,the link I show below :
https://github.com/JDAI-CV/fast-reid/blob/ced654431be28492066f4746d23c1ff89d26acbd/fastreid/modeling/losses/circle_loss.py#L38
I wonder why we need to add (-99999999.) * (1 - is_pos) after - gamma * alpha_p * (s_p - delta_p) .Thanks!!
Issue Analytics
- State:
- Created 2 years ago
- Comments:5 (2 by maintainers)
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以正样本为例，公式里面求 sum(exp) 那个部分表示只对正样本求和，如果 logits_p 不加后面的 -99999 那一项，得到的 logits_p 是一个矩阵，其中正样本的值是正确的，但是负样本的值是 0，exp(0) = 1，求和会多增加一些内容，和公式的结果会不一致
明白了謝謝！