应用背景

目标检测应用落地时，经常会有区域入侵的判断需求，本文主要记录一种简单高效的判断方法。不过区域划分目前只能是矩形，还不支持不规则区域。

思路

判断目标框是否与矩形区域有重叠。

区域入侵代码

代码片.

#include<iostream>
#include<cmath>
using namespace std;
 
typedef struct rectangle
{
	float centerX;
	float centerY;
	float width;
	float height;
}Rectangle;
 
bool areTwoRectsOverlapped(Rectangle rect1, Rectangle rect2)
{
	float verticalDistance;    //垂直距离
	float horizontalDistance;  //水平距离
	verticalDistance = fabs(rect1.centerX - rect2.centerX);
	horizontalDistance = fabs(rect1.centerY - rect2.centerY);
 
	float verticalThreshold;   //两矩形分离的垂直临界值
	float horizontalThreshold; //两矩形分离的水平临界值
	verticalThreshold = (rect1.height + rect2.height)/2;
	horizontalThreshold = (rect1.width + rect2.width )/2;
 
	if(verticalDistance > verticalThreshold || horizontalDistance > horizontalThreshold)
		return false;
 
	return true;
}
 
int main()
{
	Rectangle rect1 = {0.0, 35.0, 200.0, 100};
	Rectangle rect2 = {65.0, 50.0, 63.1, 29};
 
	if(areTwoRectsOverlapped(rect1, rect2))
		cout << "overlapped" << endl;
	else
	    cout << "not overlapped" << endl;
 
	return 0;
}