Low image quality(need Immediate help)

Question

i have an image that i have scaled using an getScaleInstance method, but the iage has got distorted. The image is a Jpanel having labels and text fields. but the momemt i scale it .. the pixel kind of overlap and hence the image gets distorted.
have arelease this friday , so need the solution asap..
Thanks
Arpita

Answer 1

getScaledInstance isn't very good at magnifying images. The following code assumes you want an image compatible with your monitor...
import java.awt.*;
import java.awt.geom.*;
import java.awt.image.*;
import java.io.*;
import java.net.*;
import javax.imageio.*;
import javax.swing.*;
public class Kit {
    public static GraphicsConfiguration getDefaultConfiguration() {
        GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
        GraphicsDevice gd = ge.getDefaultScreenDevice();
        return gd.getDefaultConfiguration();
    public static BufferedImage getScaledInstance(BufferedImage image, double scalingFactor,
        GraphicsConfiguration gc) {
            if (gc == null)
                gc = getDefaultConfiguration();
            int transparency = image.getColorModel().getTransparency();
            int w = (int)Math.floor(scalingFactor * image.getWidth());
            int h = (int)Math.floor(scalingFactor * image.getHeight());
            BufferedImage result = gc.createCompatibleImage(w, h, transparency);
            Graphics2D g2 = result.createGraphics();
            g2.setRenderingHint(RenderingHints.KEY_INTERPOLATION,
                RenderingHints.VALUE_INTERPOLATION_BICUBIC);
            AffineTransform xform = AffineTransform.getScaleInstance(scalingFactor, scalingFactor);
            g2.drawRenderedImage(image, xform);
            g2.dispose();
            return result;
    //demo main
    public static void main(String[] args) throws IOException {
        String url = "http://forum.java.sun.com/im/logo_java_grey.gif";
        BufferedImage image = ImageIO.read(new URL(url));
        BufferedImage result = getScaledInstance(image, 3.5, null);
        JFrame f = new JFrame("X");
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.getContentPane().add(new JLabel(new ImageIcon(result)));
        f.pack();
        f.setLocationRelativeTo(null);
        f.setVisible(true);
}