opencv c++访问像素和c++对图片的基本操作

#include<iostream>;
#include<opencv2\opencv.hpp>
using namespace std;
using namespace cv;

int main() {

   //Mat m =Mat ::ones(Size(3,2),CV_32FC(3));
   /*第一中访问方式
   Mat m = (Mat_<int>(3, 2) << 11, 12, 13, 14, 15, 16);
   for (int i = 0;i < m.rows;i++) {
       for (int j = 0;j < m.cols;j++) {
           cout << m.at<int>(i, j) << ",";
       }
       cout << endl;
   }
   cout << m.total();
   waitKey(0);
   return 0;*/
   //第二种访问方式
   /*
   Mat m = (Mat_<int>(3, 2) << 12, 13, 14, 15, 15, 16);
   for (int i = 0;i < m.rows;i++) {
       const int * ptr = m.ptr<int>(i);
       for (int j = 0;j < m.cols;j++) {
           cout << ptr[j]<<",";
       }
       cout << endl;
   }
   waitKey(0);
   return 0;*/
   //第三种方法
   //Vec<int, 3> vi(12, 23, 44);
   //cout << vi;
   Mat m = imread("D:\\Picture\\1.jpg");
   /*
   for (int i = 0;i < 100;i++) {
       for (int j = 0;j < 100;j++) {
           cout << m.at<Vec3b>(i, j) << ",";
       }
       cout << endl;
   }*/
   /*
   Mat k;
   vector<Mat> planes;
   split(m, planes);
   imshow("1", planes[0]);
   imshow("2", planes[1]);
   imshow("3", planes[2]);
   merge(planes, k);

   waitKey(0);*/
   /*

//选取指定矩阵范围
   Mat a = (Mat_<int>(4, 4) << 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16);
   Mat k = a.colRange(Range(2, 4));//第三列第四列
//   Mat k = a.rowRange(Range(2, 4));//第三行第四行
   for (int i = 0;i < k.rows;i++) {
       for (int j = 0;j < k.cols;j++) {
           cout << k.at<int>(i, j) << ",";
       }
       cout << endl;
   }
   waitKey(0);

   Mat b = k.clone();
   Mat c;
   k.rowRange(2, 4).copyTo(c);
   //Rect 左上角坐标右下
   */

   Mat src1 = (Mat_<uchar>(2, 3) << 11, 22, 33, 44, 55, 100);
   Mat src2 = (Mat_<float>(2, 3) << 2, 2, 2, 2, 2, 3);
   Mat dst;
   multiply(src1,src2,dst,1.0,CV_32FC1);//两个Mat相加
   for (int i = 0;i < dst.rows;i++) {
       for (int j = 0;j < dst.cols;j++) {
           cout << dst.at<float>(i, j) << ",";
       }
       cout << endl;
   }
   //c++点乘 multiply（src1,src2,dst,1.0,CV_32FC1）
//pyhton 点乘 np.multiply(src1,src2)
   //或者将 src1 设置为 uint8 src2 设置为 float src1*src2
   //点除 src1/src2
   //Mat 点除 divide();
//ndarray 点除
   // src2/src1 uint8 /0=0 float /0=inf
   //Mat 矩阵乘法 src1*src2
   // gemm()
   //np.doc(src1,src2)

   waitKey(0);

}

opencv c++访问像素和c++对图片的基本操作

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