|
交并比（Intersection-over-Union，IoU），目标检测中使用的一个概念，是产生的候选框（candidate bound）与原标记框（ground truth bound）的交叠率，即它们的交集与并集的比值。最理想情况是完全重叠，即比值为1。
计算公式：
def calculateIoU(candidateBound, groundTruthBound):
cx1 = candidateBound[0]
cy1 = candidateBound[1]
cx2 = candidateBound[2]
cy2 = candidateBound[3]
gx1 = groundTruthBound[0]
gy1 = groundTruthBound[1]
gx2 = groundTruthBound[2]
gy2 = groundTruthBound[3]
carea = (cx2 - cx1) * (cy2 - cy1) #C的面积
garea = (gx2 - gx1) * (gy2 - gy1) #G的面积
x1 = max(cx1, gx1)
y1 = max(cy1, gy1)
x2 = min(cx2, gx2)
y2 = min(cy2, gy2)
w = max(0, abs(x2 - x1))
h = max(0, abs(y2 - y1))
area = w * h #C∩G的面积
iou = area / (carea + garea - area)
return iou
转载地址：https://blog.csdn.net/mdjxy63/article/details/79343733
|