JavaFX Effects - Gaussian Blur


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Just like Box Blur, Gaussian is an effect to blur the nodes in JavaFX. The only difference is that in Gaussian Blur Effect, a Gaussian convolution kernel is used to produce the blurring effect.

The class named GaussianBlur of the package javafx.scene.effect represents the Gaussian Blur Effect, this class contains two properties, which are −

  • input − This property is of the type Effect and it represents an input to the box blur effect.

  • radius − This property is of a double type representing the radius with which the Gaussian Blur effect is to be applied. The blur effect is directly proportional to radius.

Example

The following program is an example demonstrating the Gaussian blur effect. In this, we are drawing a text “Welcome to Tutorialspoint” filled with DARKSEAGREEN color and applying the Gaussian Blur Effect to it.

Save this code in a file with the name GaussianBlurEffectExample.java.

import javafx.application.Application; 
import javafx.scene.Group; 
import javafx.scene.Scene; 
import javafx.scene.paint.Color; 
import javafx.stage.Stage; 
import javafx.scene.text.Font; 
import javafx.scene.text.FontWeight; 
import javafx.scene.text.Text; 
import javafx.scene.effect.GaussianBlur; 
         
public class GaussianBlurEffectExample extends Application { 
   @Override 
   public void start(Stage stage) {       
      //Creating a Text object 
      Text text = new Text();       
      
      //Setting font to the text 
      text.setFont(Font.font(null, FontWeight.BOLD, 40));       
      
      //setting the position of the text 
      text.setX(60); 
      text.setY(150);         
      
      //Setting the text to be added. 
      text.setText("Welcome to Tutorialspoint");       
      
      //Setting the color of the text 
      text.setFill(Color.DARKSEAGREEN);  
       
      //Instantiating the GaussianBlur class
      GaussianBlur gaussianBlur = new GaussianBlur();       
      
      //Setting the radius to apply the Gaussian Blur effect  
      gaussianBlur.setRadius(10.5); 
       
      //Applying Gaussian Blur effect to the text 
      text.setEffect(gaussianBlur);        
         
      //Creating a Group object  
      Group root = new Group(text);   
               
      //Creating a scene object 
      Scene scene = new Scene(root, 600, 300); 
      
      //Setting title to the Stage 
      stage.setTitle("Sample Application"); 
         
      //Adding scene to the stage 
      stage.setScene(scene); 
         
      //Displaying the contents of the stage 
      stage.show();         
   } 
   public static void main(String args[]){ 
      launch(args); 
   } 
} 

Compile and execute the saved java file from the command prompt using the following commands.

javac GaussianBlurEffectExample.java 
java GaussianBlurEffectExample  

On executing, the above program generates a JavaFX window as shown below.

Gaussian Blur Effect
javafx_effects.htm
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