initial commit

samples/cpp/tutorial_code/ImgTrans/copyMakeBorder_demo.cpp

@@ -0,0 +1,84 @@
+/**
+ * @file copyMakeBorder_demo.cpp
+ * @brief Sample code that shows the functionality of copyMakeBorder
+ * @author OpenCV team
+ */
+
+#include "opencv2/imgproc.hpp"
+#include "opencv2/imgcodecs.hpp"
+#include "opencv2/highgui.hpp"
+
+using namespace cv;
+
+//![variables]
+// Declare the variables
+Mat src, dst;
+int top, bottom, left, right;
+int borderType = BORDER_CONSTANT;
+const char* window_name = "copyMakeBorder Demo";
+RNG rng(12345);
+//![variables]
+
+/**
+ * @function main
+ */
+int main( int argc, char** argv )
+{
+    //![load]
+    const char* imageName = argc >=2 ? argv[1] : "lena.jpg";
+
+    // Loads an image
+    src = imread( samples::findFile( imageName ), IMREAD_COLOR ); // Load an image
+
+    // Check if image is loaded fine
+    if( src.empty()) {
+        printf(" Error opening image\n");
+        printf(" Program Arguments: [image_name -- default lena.jpg] \n");
+        return -1;
+    }
+    //![load]
+
+    // Brief how-to for this program
+    printf( "\n \t copyMakeBorder Demo: \n" );
+    printf( "\t -------------------- \n" );
+    printf( " ** Press 'c' to set the border to a random constant value \n");
+    printf( " ** Press 'r' to set the border to be replicated \n");
+    printf( " ** Press 'ESC' to exit the program \n");
+
+    //![create_window]
+    namedWindow( window_name, WINDOW_AUTOSIZE );
+    //![create_window]
+
+    //![init_arguments]
+    // Initialize arguments for the filter
+    top = (int) (0.05*src.rows); bottom = top;
+    left = (int) (0.05*src.cols); right = left;
+    //![init_arguments]
+
+    for(;;)
+    {
+        //![update_value]
+        Scalar value( rng.uniform(0, 255), rng.uniform(0, 255), rng.uniform(0, 255) );
+        //![update_value]
+
+        //![copymakeborder]
+        copyMakeBorder( src, dst, top, bottom, left, right, borderType, value );
+        //![copymakeborder]
+
+        //![display]
+        imshow( window_name, dst );
+        //![display]
+
+        //![check_keypress]
+        char c = (char)waitKey(500);
+        if( c == 27 )
+        { break; }
+        else if( c == 'c' )
+        { borderType = BORDER_CONSTANT; }
+        else if( c == 'r' )
+        { borderType = BORDER_REPLICATE; }
+        //![check_keypress]
+    }
+
+    return 0;
+}