课程四(Convolutional Neural Networks),第三 周(Object detection) —— 1.Practice questions:Detection algorithms











【解释】
tree的两个bounding boxes 都要保留,因为交并比小于0.5;car 0.73保留;pedestrain 0.98保留;motorcycle 0.58保留。一共5个。

【解释】
5个anchor box, 一个anchor box 对应(1+4+20)个标签,所以output volume 是 19*19*5*25
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