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https://blog.csdn.net/weixin_39190382?type=blog

0. 前言

图像信息获取，roi

1. 图像信息获取

// 获取图像信息#include <iostream>
#include <opencv2/opencv.hpp>using namespace cv;
using namespace std;int main(){Mat img = imread("/home/v/home.png");if(img.empty()){cout<<"Error: Could not load image."<<endl;return -1;}imshow("img",img);cout<<"img row: "<<img.rows<<endl;cout<<"img col: "<<img.cols<<endl;cout<<"img ch: "<<img.channels()<<endl;waitKey(0);return 0;
}

2. 图像ROI

// 获取图像信息#include <iostream>
#include <opencv2/opencv.hpp>using namespace cv;
using namespace std;int main(){Mat img = imread("/home/v/home.png");if(img.empty()){cout<<"Error: Could not load image."<<endl;return -1;}imshow("img",img);// 图像信息cout<<"img row: "<<img.rows<<endl;cout<<"img col: "<<img.cols<<endl;cout<<"img ch: "<<img.channels()<<endl;// 图像roiMat imageROI(img, Rect(100,100,200,150));imshow("imageROI",imageROI);waitKey(0);return 0;
}