init - 初始化项目

samples/cpp/tutorial_code/introduction/display_image/display_image.cpp

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+//! [includes]
+#include <opencv2/core.hpp>
+#include <opencv2/imgcodecs.hpp>
+#include <opencv2/highgui.hpp>
+
+#include <iostream>
+
+using namespace cv;
+//! [includes]
+
+int main()
+{
+    //! [imread]
+    std::string image_path = samples::findFile("starry_night.jpg");
+    Mat img = imread(image_path, IMREAD_COLOR);
+    //! [imread]
+
+    //! [empty]
+    if(img.empty())
+    {
+        std::cout << "Could not read the image: " << image_path << std::endl;
+        return 1;
+    }
+    //! [empty]
+
+    //! [imshow]
+    imshow("Display window", img);
+    int k = waitKey(0); // Wait for a keystroke in the window
+    //! [imshow]
+
+    //! [imsave]
+    if(k == 's')
+    {
+        imwrite("starry_night.png", img);
+    }
+    //! [imsave]
+
+    return 0;
+}