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/**
* @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);
}
}
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