initial commit

2025-08-15 11:10:24 +08:00 · 2020-03-23 11:48:41 +01:00
commit fce6dc35b4
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--- a/samples/java/tutorial_code/ImgTrans/MakeBorder/CopyMakeBorder.java
+++ b/samples/java/tutorial_code/ImgTrans/MakeBorder/CopyMakeBorder.java
@ -0,0 +1,94 @@
+/**
+ * @file CopyMakeBorder.java
+ * @brief Sample code that shows the functionality of copyMakeBorder
+ */
+
+import org.opencv.core.*;
+import org.opencv.highgui.HighGui;
+import org.opencv.imgcodecs.Imgcodecs;
+
+import java.util.Random;
+
+class CopyMakeBorderRun {
+
+    public void run(String[] args) {
+
+        //! [variables]
+        // Declare the variables
+        Mat src, dst = new Mat();
+        int top, bottom, left, right;
+        int borderType = Core.BORDER_CONSTANT;
+        String window_name = "copyMakeBorder Demo";
+        Random rng;
+        //! [variables]
+
+        //! [load]
+        String imageName = ((args.length > 0) ? args[0] : "../data/lena.jpg");
+
+        // Load an image
+        src = Imgcodecs.imread(imageName, Imgcodecs.IMREAD_COLOR);
+
+        // Check if image is loaded fine
+        if( src.empty() ) {
+            System.out.println("Error opening image!");
+            System.out.println("Program Arguments: [image_name -- default ../data/lena.jpg] \n");
+            System.exit(-1);
+        }
+        //! [load]
+
+        // Brief how-to for this program
+        System.out.println("\n" +
+                "\t copyMakeBorder Demo: \n" +
+                "\t -------------------- \n" +
+                " ** Press 'c' to set the border to a random constant value \n" +
+                " ** Press 'r' to set the border to be replicated \n" +
+                " ** Press 'ESC' to exit the program \n");
+
+        //![create_window]
+        HighGui.namedWindow( window_name, HighGui.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]
+
+        while( true ) {
+            //! [update_value]
+            rng = new Random();
+            Scalar value = new Scalar( rng.nextInt(256),
+                    rng.nextInt(256), rng.nextInt(256) );
+            //! [update_value]
+
+            //! [copymakeborder]
+            Core.copyMakeBorder( src, dst, top, bottom, left, right, borderType, value);
+            //! [copymakeborder]
+            //! [display]
+            HighGui.imshow( window_name, dst );
+            //! [display]
+
+            //![check_keypress]
+            char c = (char) HighGui.waitKey(500);
+            c = Character.toLowerCase(c);
+
+            if( c == 27 )
+            { break; }
+            else if( c == 'c' )
+            { borderType = Core.BORDER_CONSTANT;}
+            else if( c == 'r' )
+            { borderType = Core.BORDER_REPLICATE;}
+            //![check_keypress]
+        }
+
+        System.exit(0);
+    }
+}
+
+public class CopyMakeBorder {
+    public static void main(String[] args) {
+        // Load the native library.
+        System.loadLibrary(Core.NATIVE_LIBRARY_NAME);
+        new CopyMakeBorderRun().run(args);
+    }
+}