Added: Create single coloured blank image

Author: ameycodes

algorithms/image-processing/createColoredImage.cpp

@@ -0,0 +1,48 @@
+// Create a coloured image in C++ using OpenCV.
+
+#include "opencv2/highgui/highgui.hpp"
+using namespace cv;
+using namespace std;
+
+int main()
+{
+    // To create an image
+    // CV_8UC3 depicts : (3 channels,8 bit image depth
+    // Height  = 500 pixels, Width = 1000 pixels
+    // (0, 0, 100) assigned for Blue, Green and Red
+    //             plane respectively.
+    // So the image will appear red as the red
+    // component is set to 100.
+    Mat img(500, 1000, CV_8UC3, Scalar(0,0, 100));
+
+    // check whether the image is loaded or not
+    if (img.empty())
+    {
+        cout << "\n Image not created. You"
+                     " have done something wrong. \n";
+        return -1;    // Unsuccessful.
+    }
+
+    // first argument: name of the window
+    // second argument: flag- types:
+    // WINDOW_NORMAL If this is set, the user can
+    //               resize the window.
+    // WINDOW_AUTOSIZE If this is set, the window size
+    //                is automatically adjusted to fit
+    //                the displayed image, and you cannot
+    //                change the window size manually.
+    // WINDOW_OPENGL  If this is set, the window will be
+    //                created with OpenGL support.
+    namedWindow("A_good_name", CV_WINDOW_AUTOSIZE);
+
+    // first argument: name of the window
+    // second argument: image to be shown(Mat object)
+    imshow("A_good_name", img);
+
+    waitKey(0); //wait infinite time for a keypress
+
+    // destroy the window with the name, "MyWindow"
+    destroyWindow("A_good_name");
+
+    return 0;
+}