faster-rcnn中bbox_iou函数“np.maximum(bbox_a[:, None, :2], bbox_b[:, :2])”的含义
函数“np.maximum(bbox_a[:,None,:2],bbox_b[:,:2])”的含义bbox_a中每行元素逐一与bbox_b中每行元素进行对比假设我们认为bbox_a.shape=[5,4],bbox_b=[2,4],具体数据如下:bbox_a=np.array([[9,88,9,30],[63,56,9,24],[4,79,93,12],[34,6,21,5],[81,38,80,