Brightening or Darkening an RGB Buffered Image - Java 2D Graphics

Java examples for 2D Graphics:Color RGB

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Description

Brightening or Darkening an RGB Buffered Image

Demo Code

import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.image.BufferedImage;
import java.awt.image.RescaleOp;

import javax.swing.ImageIcon;

public class Main {
  public void m() throws Exception {
    // Brighten the image by 30%
    float scaleFactor = 1.3f;
    RescaleOp op = new RescaleOp(scaleFactor, 0, null);
    BufferedImage bufferedImage = null;
    bufferedImage = op.filter(bufferedImage, null);

    // Darken the image by 10%
    scaleFactor = .9f;/*from ww w  . j  av a2 s.  c o m*/
    op = new RescaleOp(scaleFactor, 0, null);
    bufferedImage = op.filter(bufferedImage, null);
    // Get non-RGB image
    Image image = new ImageIcon("image.gif").getImage();

    // Create an RGB buffered image
    BufferedImage bimage = new BufferedImage(image.getWidth(null),
        image.getHeight(null), BufferedImage.TYPE_INT_RGB);

    // Copy non-RGB image to the RGB buffered image
    Graphics2D g = bimage.createGraphics();
    g.drawImage(image, 0, 0, null);
    g.dispose();
  }
}

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