矩形框的IOU计算C++实现_c++ 代码斜率矩形 iou

可以利用opencv进行实现，非常简单，如果不使用opencv也可以使用min，max也不难。因此下面的C++代码包含了两种计算矩形框IOU的方法。

#include<iostream>
#include<algorithm>
#include<vector>
 
#include<opencv2/opencv.hpp>
 
using namespace std;
 
struct bbox
{
	int m_left;
	int m_top;
	int m_width;
	int m_height;
 
	bbox() {}
	bbox(int left, int top, int width, int height) 
	{
		m_left = left;
		m_top = top;
		m_width = width;
		m_height = height;
	}
};
 
float IOU(const bbox& b1, const bbox& b2)
{
	float w = std::min(b1.m_left + b1.m_width, b2.m_left + b2.m_width)
		      - std::max(b1.m_left, b2.m_left);
	float h = std::min(b1.m_top + b1.m_height, b2.m_top + b2.m_height)
		      - std::max(b1.m_top, b2.m_top);
 
 
	if (w <= 0 || h <= 0)
		return 0;
 
	std::cout << "w :" << w << "h :" << h << std::endl;
 
	return (w * h) / ((b1.m_height * b1.m_width) + (b2.m_heig
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