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How to implement Bilateral blur in OpenCV using Java?
You can blur an image by filtering it using a low-pass filter, this removes high frequency content (noise, edges) from an image. Bilateral Filtering is one of the blurring techniques provided by OpenCV, it −
removes noise efficiently
keeps the edges sharp
Comparatively slow
You can apply the bilateral filter on an image using the bilateralFilter() method, this method accepts
Two Mat objects representing the source and destination images.
An integer representing the diameter of the pixel neighborhood.
Two integer variables of the type integer representing the filter sigma in the color space and coordinate space.
An Integer object representing the type of the border used.
Example
import java.awt.Image;
import java.awt.image.BufferedImage;
import java.io.IOException;
import javafx.application.Application;
import javafx.embed.swing.SwingFXUtils;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.image.ImageView;
import javafx.scene.image.WritableImage;
import javafx.stage.Stage;
import org.opencv.core.Core;
import org.opencv.core.Mat;
import org.opencv.highgui.HighGui;
import org.opencv.imgcodecs.Imgcodecs;
import org.opencv.imgproc.Imgproc;
public class BilateralFilterExample extends Application {
public void start(Stage stage) throws IOException {
//Loading the OpenCV core library
System.loadLibrary( Core.NATIVE_LIBRARY_NAME );
//Reading image data
String file ="D:\Images\window.jpg";
Mat src = Imgcodecs.imread(file);
//Creating destination matrix
Mat dst = new Mat(src.rows(), src.cols(), src.type());
//Applying Bilateral filter
Imgproc.bilateralFilter(src, dst, 25, 75, 75, Core.BORDER_DEFAULT);
//Converting matrix to JavaFX writable image
Image img = HighGui.toBufferedImage(dst);
WritableImage writableImage= SwingFXUtils.toFXImage((BufferedImage) img, null);
//Setting the image view
ImageView imageView = new ImageView(writableImage);
imageView.setX(10);
imageView.setY(10);
imageView.setFitWidth(575);
imageView.setPreserveRatio(true);
//Setting the Scene object
Group root = new Group(imageView);
Scene scene = new Scene(root, 595, 400);
stage.setTitle("Bilateral Filter Example");
stage.setScene(scene);
stage.show();
}
public static void main(String args[]) {
launch(args);
}
}Input Image
Output
On executing, the above program generates the following output −
Updated on: 09-Apr-2020
244 Views
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