[学习opencv]图像读取写入，加减乘除

#include "cv.h"#include "highgui.h"#include <iostream>using namespace std;using namespace cv;int main(int argc, char* argv[]){        Mat img1 = imread("maki.jpg");         Mat img2 = imread("misaka.jpg");        int height=img1.rows;                //行数        int width=img1.cols;                   //列数        int dims=img1.dims;                    //维数        cout<<height<<"  "<<width<<"  "<<dims<<endl;        Mat tmp(height,width,CV_8UC3,Scalar(2,2,2));  //产生一个[height width 3]所有元素全为2的矩阵        Mat re;            //运算符重载真是让人喜欢        re=img1+Scalar(100,100,100);                    //图像相加        imshow("image1", re);        re=img1-img2;                      //图像相减        imshow("image2",re);        re=img1*2;                      //图像和一个数相乘            imshow("image3",re);        re=img1/2;                    //图像和一个数相除        imshow("image4",re);        re=img1.mul(tmp);            //img1和tmp每个元素相乘        imshow("image5",re);        Vec3i s=re.at<Vec3b>(1,1);   //数据访问        cout<<s.val[0]<<"  "<<s.val[1]<<"  "<<s.val[2]<<endl;        imwrite("re.jpg",re);        waitKey();        return 0;}