Following the introduction to matrices, we are going to start with the OpenCV code basics. The first thing that we have to learn is how to read and write images:
#include <iostream>
#include <string>
#include <sstream>
using namespace std;
// OpenCV includes
#include "opencv2/core.hpp"
#include "opencv2/highgui.hpp"
using namespace cv;
int main(int argc, const char** argv)
{
// Read images
Mat color= imread("../lena.jpg");
Mat gray= imread("../lena.jpg",CV_LOAD_IMAGE_GRAYSCALE);
if(! color.data ) // Check for invalid input { cout << "Could not open or find the image" << std::endl ; return -1; } // Write images imwrite("lenaGray.jpg", gray); // Get same pixel with opencv function int myRow=color.cols-1; int myCol=color.rows-1; ...
