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- C++ main.cpp:
- ```
- #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("./images.jpeg"); // by default
- if (argc > 1) {
- imageName = argv[1];
- }
- Mat image;
- image = imread(imageName.c_str(), IMREAD_COLOR);
- if (image.empty()) {
- cout << "Could not open or find the image" << std::endl ;
- return -1;
- }
- cout << "Initial image dimension: " << image.cols << " X " << image.rows << endl;
- namedWindow( "Display window", WINDOW_AUTOSIZE );
- imshow( "Display window", image );
- waitKey(0);
- const int cropSize = 128;
- const int offsetW = (image.cols - cropSize) / 2;
- const int offsetH = (image.rows - cropSize) / 2;
- const Rect roi(offsetW, offsetH, cropSize, cropSize);
- image = image(roi).clone();
- cout << "Cropped image dimension: " << image.cols << " X " << image.rows << endl;
- imshow( "Display window", image );
- waitKey(0);
- return 0;
- }
- ```
- Compile:
- ```
- g++ -std=c++11 main.cpp `pkg-config --libs --cflags opencv` -o main
- ```
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