c++ opencv mat 最大值，数据类型

 

mat.type()函数

opencv中Mat存在各种类型，其中mat有一个type（）的函数可以返回该Mat的类型。类型表示了矩阵中元素的类型以及矩阵的通道个数，它是一系列的预定义的常量。具体的有以下值：

通道数我们可以发现，C4=C3+8、C3=C2+8

c++ opencv mat 最大值

#include <opencv2/opencv.hpp>
using namespace cv;
using namespace std;
int main()
{
	uchar data[] = {
		10, 200, 5, 7, 9,
		15, 35, 60, 80, 170,
		100, 2, 55, 37, 70
	};
	Mat  m1(3, 5, CV_8U, data);
 
	Mat  m_min, m_max;						// minimum value, maximum value
 
	double minVal, maxVal;
	int    minIdx[2] = {}, maxIdx[2] = {};	// minnimum Index, maximum Index
		
	minMaxIdx(m1, &minVal, &maxVal, minIdx, maxIdx);
	
	cout << "[m1] = " << endl << m1 << endl << endl;
	cout << "[m_min] = " << endl << m_min << endl;
	cout << "[m_max] = " << endl << m_max << endl << endl;
	
	cout << "minimum value in m1  : " << minVal << endl;
	cout << "   minimum value's Index is : " << minIdx[1] << ", " << minIdx[0] << endl;
 
	cout << "maximum value in m1: " << maxVal << endl;
	cout << "    maxnimum value's Index is : " << maxIdx[1] << ", " << maxIdx[0] << endl << endl;
 
 
	return 0;
}

 

来源：oschina

链接：https://my.oschina.net/u/4351246/blog/4748722