opencv-meanstddev計算矩陣的均值和標準偏差
阿新 • • 發佈:2021-11-25
#include<opencv2/opencv.hpp> #include<iostream> #include <vector> int main(int argc, char** argv) { cv::Mat src(5, 4, CV_8UC3, cv::Scalar(10,20,30)); std::cerr << src << std::endl; cv::Mat mean, stddev; cv::meanStdDev(src,mean, stddev); double m = 0, sd = 0; std::cerr << mean << std::endl; m = mean.at<double>(0, 0);//返回第一通道均值 std::cerr << "第一通道均值=" <<m<< std::endl; m = mean.at<double>(1, 0);//返回第二通道均值 std::cerr << "第二通道均值=" << m << std::endl; m = mean.at<double>(2, 0);//返回第三通道均值 std::cerr << "第三通道均值=" << m << std::endl; std::cerr << stddev << std::endl; sd = stddev.at<double>(0, 0); //返回第一通道標準偏差 std::cerr << "第一通道標準偏差=" << sd << std::endl; sd = stddev.at<double>(1, 0); //返回第二通道標準偏差 std::cerr << "第二通道標準偏差=" << sd << std::endl; sd = stddev.at<double>(2, 0); //返回第三通道標準偏差 std::cerr << "第三通道標準偏差=" << sd << std::endl; cv::waitKey(0); return 0; }