#include <opencv2/core/core.hpp> #include <opencv2/imgcodecs.hpp> #include <opencv2/highgui/highgui.hpp> #include <iostream> #include <string> using namespace cv; using namespace std; int main( int argc, char** argv ) { string imageName("../data/HappyFish.jpg"); // by default if( argc > 1) { imageName = argv[1]; } Mat image; image = imread(imageName.c_str(), IMREAD_COLOR); // Read the file if( image.empty() ) // Check for invalid input { cout << "Could not open or find the image" << std::endl ; return -1; } namedWindow( "Display window", WINDOW_AUTOSIZE ); // Create a window for display. imshow( "Display window", image ); // Show our image inside it. waitKey(0); // Wait for a keystroke in the window return 0; }