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javajpegimage-resizing
Quintis555
Quintis555

Reputation: 669

Can I change the resolution of a jpg image in Java?

I have some .jpg's that I'm displaying in a panel. Unfortunately they're all about 1500x1125 pixels, which is way too big for what I'm going for. Is there a programmatic way to change the resolution of these .jpg's?

Upvotes: 5

Views: 16774

Answers (3)

ewok
ewok

Reputation: 21443

you can try:

private BufferedImage getScaledImage(Image srcImg, int w, int h) {
    BufferedImage resizedImg = new BufferedImage(w, h, Transparency.TRANSLUCENT);
    Graphics2D g2 = resizedImg.createGraphics();
    g2.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR);
    g2.drawImage(srcImg, 0, 0, w, h, null);
    g2.dispose();
    return resizedImg;
}

Upvotes: 1

Jonathan Payne
Jonathan Payne

Reputation: 2223

Load it as an ImageIcon and this'll do the trick:

import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import javax.swing.ImageIcon;

public static ImageIcon resizeImageIcon( ImageIcon imageIcon , Integer width , Integer height )
{
    BufferedImage bufferedImage = new BufferedImage( width , height , BufferedImage.TRANSLUCENT );

    Graphics2D graphics2D = bufferedImage.createGraphics();
    graphics2D.drawImage( imageIcon.getImage() , 0 , 0 , width , height , null );
    graphics2D.dispose();

    return new ImageIcon( bufferedImage , imageIcon.getDescription() );
}

Upvotes: 3

toniedzwiedz
toniedzwiedz

Reputation: 18543

You can scale an image using Graphics2D methods (from java.awt). This tutorial at mkyong.com explains it in depth.

Upvotes: 5

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