Cách thực hiện Blur trung bình (Averaging Blur) trong OpenCV Java

Phương thức blur(src, dst, ksize, anchor, borderType):

• ksize: kích thước kernel (Size).
• anchor: điểm neo (Point), mặc định (-1,-1) là tâm.
• borderType: loại đường viền (ví dụ Core.BORDER_DEFAULT).

Ví dụ (JavaFX)

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.core.Point;
import org.opencv.core.Size;
import org.opencv.highgui.HighGui;
import org.opencv.imgcodecs.Imgcodecs;
import org.opencv.imgproc.Imgproc;

public class NormalizedBoxExample extends Application {
    public void start(Stage stage) throws IOException {
        System.loadLibrary(Core.NATIVE_LIBRARY_NAME);
        String file = "D:\\Images\\lamma2.jpg";
        Mat src = Imgcodecs.imread(file);
        Mat dst = new Mat(src.rows(), src.cols(), src.type());
        Size size = new Size(45, 45);
        Point point = new Point(20, 30);
        Imgproc.blur(src, dst, size, point, Core.BORDER_DEFAULT);
        Image img = HighGui.toBufferedImage(dst);
        WritableImage writableImage = SwingFXUtils.toFXImage((BufferedImage) img, null);
        ImageView imageView = new ImageView(writableImage);
        imageView.setX(10); imageView.setY(10);
        imageView.setFitWidth(575); imageView.setPreserveRatio(true);
        Group root = new Group(imageView);
        Scene scene = new Scene(root, 595, 400);
        stage.setTitle("Normalized Blur Example");
        stage.setScene(scene);
        stage.show();
    }
    public static void main(String args[]) { launch(args); }
}

Ảnh gốc

Ảnh sau Averaging Blur (45x45, anchor 20,30)