算法1近邻框的选择策略
输入:X={x1,?????????????????????x2,????????????????????,?????????????????????xM},x0=(α0,?????????????????????β0,?????????????????????w0,?????????????????????h0),X*=?,threshold
输出:X*
1. for xi????????????????????? in X
2. ??iou = calculateIOU(xi,?????????????????????x0?????????????????????????)
3. ??if iou > threshold
4. ????X*←xi
5. ??end if
6. end for