OpenCV计算两个矩形的重合度（重叠度）
1. float bbOverlap(const BoundingBox& box1,const BoundingBox& box2)
{
if (box1.x > box2.x+box2.width) { return 0.0; }
if (box1.y > box2.y+box2.height) { return 0.0; }
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if (box1.x+box1.width < box2.x) { return 0.0; }
if (box1.y+box1.height < box2.y) { return 0.0; }
float colInt = min(box1.x+box1.width,box2.x+box2.width) - max(box1.x, box2.x);
float rowInt = min(box1.y+box1.height,box2.y+box2.height) - max(box1.y,box2.y);
float interction = colInt * rowInt;
float area1 = box1.width box1.height;
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float area2 = box2.width box2.height;
return interction / (area1 + area2 - interction);
}
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2. float computRectJoinUnion(const CvRect &rc1, const CvRect &rc2, float& AJoin, float& AUnion)
{
CvPoint p1, p2; //p1为相交位置的左上⾓坐标，p2为相交位置的右下⾓坐标
p1.x = std::max(rc1.x, rc2.x);
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p2.x = std::min(rc1.x + rc1.width, rc2.x + rc2.width);
p2.y = std::min(rc1.y + rc1.height, rc2.y + rc2.height);
AJoin = 0;
if (p2.x > p1.x && p2.y > p1.y) //判断是否相交
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AJoin = (p2.x - p1.x)*(p2.y - p1.y); //求出相交⾯积
}
float A1 = rc1.width * rc1.height;
float A2 = rc2.width * rc2.height;
AUnion = (A1 + A2 - AJoin); //两者组合的⾯积
槟城if (AUnion > 0)
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return 0;
}
