Cannot find reference ‘bbox_overlaps‘ in ‘cython_bbox.py‘

1. 注释掉 from cython_bbox import bbox_overlaps as bbox_ious

2. 加入代码

def bbox_ious(
        boxes,
        query_boxes):
    N = boxes.shape[0]
    K = query_boxes.shape[0]
    overlaps = np.zeros((N, K), dtype=np.float)
    for k in range(K):
        box_area = (
            (query_boxes[k, 2] - query_boxes[k, 0] + 1) *
            (query_boxes[k, 3] - query_boxes[k, 1] + 1)
        )
        for n in range(N):
            iw = (
                min(boxes[n, 2], query_boxes[k, 2]) -
                max(boxes[n, 0], query_boxes[k, 0]) + 1
            )
            if iw > 0:
                ih = (
                    min(boxes[n, 3], query_boxes[k, 3]) -
                    max(boxes[n, 1], query_boxes[k, 1]) + 1
                )
                if ih > 0:
                    ua = float