rewrite rpn operation(from numpy to pytorch) #141
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我发现frcnn_trainning.py中的numpy操作极大地影响了训练速度,而且会导致CPU利用率太高,所以我将其中绝大部分numpy操作改为了pytorch操作,在我的实验设置下提速10%左右,每个迭代由1.33 it/s 降低为 1.13it/s,任保留了作者之前的numpy写法,是可选择的。