【极简笔记】Focal Loss

【极简笔记】Focal Loss Focal Loss for Dense Object Detection 文章的核心就是提出了focal loss用来取代原有的cross entropy loss pt={p,1−p,if y=1otherwise p t = { p , if  y = 1 1 − p , otherwise CE(pt)=−log(pt) C E ( p t ) = − l

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