JavaFX | ColorAdjust Class

ColorAdjust class is a part of JavaFX. ColorAdjust class allows per-pixel adjustments of hue, saturation, brightness, and contrast. ColorAdjust class inherits Effect class.
Constructors of the class:

1. ColorAdjust(): Creates a new Object of ColorAdjust class
2. ColorAdjust(double hue, double saturation, double brightness, double contrast): Creates a new Object of ColorAdjust class with specified values of hue, saturation, brightness and contrast.

Commonly Used Methods:

Methods	Explanation
getBrightness()	Returns the value of brightness of ColorAdjust effect
setBrightness(double v)	Sets the value of brightness of ColorAdjust effect
getHue()	Returns the value of Hue of ColorAdjust effect
setHue(double v)	Sets the value of Hue of ColorAdjust effect
getContrast()	Returns the value of Contrast of ColorAdjust effect
setContrast(double v)	Sets the value of Contrast of ColorAdjust effect
getSaturation()	Returns the value of Saturation of ColorAdjust effect
setSaturation(double v)	Sets the value of Saturation of ColorAdjust effect
getInput()	Returns the value of property input
setInput(Effect v)	Sets the value of property input

Below programs illustrate the use of ColorAdjust class: 

1. Java Program to apply color Adjust effect to a image with specified hue, brightness, contrast and Saturation: In this program a FileInputStream is created and an image is taken as input from a file. Image named image is created using the input from file input stream. From the image a image view object is created and it is added to the VBox. The VBox is then added to the scene and the scene is added to the stage. A ColorAdjust effect is created and the values for hue, saturation, contrast and brightness are set using function setHue(), setBrightness(), setSaturation(), setContrast() and the effect is set to the image view using setEffect() function.
   

Java

// Java Program to apply color Adjust effect
// to a image with specified hue, brightness,
// contrast and Saturation
import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.*;
import javafx.scene.layout.*;
import javafx.stage.Stage;
import javafx.scene.image.*;
import javafx.scene.effect.*;
import java.io.*;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.scene.Group;

public class ColorAdjust_1 extends Application {

    // launch the application
    public void start(Stage stage) throws Exception
    {

        // set title for the stage
        stage.setTitle("ColorAdjust example");

        // create a input stream
        FileInputStream input = new FileInputStream("f:\\gfg.png");

        // create a image
        Image image = new Image(input);

        // create a image View
        ImageView imageview = new ImageView(image);

        // create a ColorAdjust effect
        ColorAdjust color_adjust = new ColorAdjust();

        // set hue, saturation, brightness, and contrast
        color_adjust.setHue(0.4);
        color_adjust.setBrightness(0.6);
        color_adjust.setContrast(0.8);
        color_adjust.setSaturation(0.1);

        // set effect
        imageview.setEffect(color_adjust);

        // create a VBox
        VBox vbox = new VBox(imageview);

        // create a scene
        Scene scene = new Scene(vbox, 200, 200);

        // set the scene
        stage.setScene(scene);

        stage.show();
    }

    // Main Method
    public static void main(String args[])
    {

        // launch the application
        launch(args);
    }
}

1. Input Image:
   

1. Output:
   

1. Java Program to apply color Adjust effect to an image with hue, brightness, contrast, and Saturation is taken as input from the user(using text fields): In this program a FileInputStream is created and an image is taken as input from a file. Image named image is created using the input from the file input stream. From the image, an image view object is created and it is added to the VBox. The VBox is then added to the scene and the scene is added to the stage. A ColorAdjust effect is created and the values for hue, saturation, contrast and brightness are set using function setHue(), setBrightness(), setSaturation(), setContrast() and the effect is set to the image view using setEffect() function. We will create four text fields(hue, saturation, contrast, and brightness) and a Button button. The user will give the necessary values of hue, saturation, contrast, and brightness and the values will be applied to the image when the button is pressed. An EventHandler is created to handle the button events. 
   

Java

// Java Program to apply color Adjust effect
// to a image with hue, brightness, contrast
// and Saturation taken as input from user
import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.*;
import javafx.scene.layout.*;
import javafx.stage.Stage;
import javafx.scene.image.*;
import javafx.scene.effect.*;
import java.io.*;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.scene.Group;

public class ColorAdjust_2 extends Application {

// launch the application
public void start(Stage stage) throws Exception
{

    // set title for the stage
    stage.setTitle("ColorAdjust example");

    // textfields
    TextField hue, saturation, brightness, contrast;

    // create the textFields
    hue = new TextField("Hue");
    saturation = new TextField("Saturation");
    brightness = new TextField("Brightness");
    contrast = new TextField("Contrast");

    // create a input stream
    FileInputStream input = new FileInputStream("f:\\gfg.png");

    // create a image
    Image image = new Image(input);

    // create a image View
    ImageView imageview = new ImageView(image);

    // create a ColorAdjust effect
    ColorAdjust color_adjust = new ColorAdjust();

    // create a button
    Button button = new Button("apply");

    // action event
    EventHandler<ActionEvent> event = new EventHandler<ActionEvent>() {
        public void handle(ActionEvent e)
        {
            // set the hue, brightness, contrast and saturation
            color_adjust.setHue(Double.parseDouble(hue.getText()));

            color_adjust.setBrightness(Double.parseDouble(
                                     brightness.getText()));

            color_adjust.setContrast(Double.parseDouble(
                                    contrast.getText()));

            color_adjust.setSaturation(Double.parseDouble(
                                     saturation.getText()));
        }
    };

    // set on action of button
    button.setOnAction(event);

    // set effect
    imageview.setEffect(color_adjust);

    // create a VBox
    VBox vbox = new VBox(imageview, hue, saturation,
                    brightness, contrast, button);

    // create a scene
    Scene scene = new Scene(vbox, 200, 400);

    // set the scene
    stage.setScene(scene);

    stage.show();
}

// Main Method
public static void main(String args[])
{

    // launch the application
    launch(args);
}
}

1. Input Image:
   

1. Output:
   

Note: The above programs might not run in an online IDE. Please use an offline compiler.
Reference: https://docs.oracle.com/javase/8/javafx/api/javafx/scene/effect/ColorAdjust.html