Erosion and dilation are the two basic morphological operations. As the name implies, morphological operations are the set of operations that process images according to their shapes.
During dilation operation additional pixels are added to an image boundary, a total number of pixels added during the dilation process depends on the dimensions of the structuring element used.
You can dilate an image using the dilate() method of the Imgproc class, this method three mat objects representing source, destination, and kernel.
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.core.Size; import org.opencv.highgui.HighGui; import org.opencv.imgcodecs.Imgcodecs; import org.opencv.imgproc.Imgproc; public class ImageDilation 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\\lamma2.jpg"; Mat src = Imgcodecs.imread(file); //Creating destination matrix Mat dst = new Mat(src.rows(), src.cols(), src.type()); //Preparing the kernel matrix object Mat kernel = Imgproc.getStructuringElement(Imgproc.MORPH_RECT, new Size((2*2) + 1, (2*2)+1)); //Applying dilate on the Image Imgproc.dilate(src, dst, kernel); //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("Dilation Example"); stage.setScene(scene); stage.show(); } public static void main(String args[]) { launch(args); } }
Input Image
Output
On executing, above example generates the following output −