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Load image, scale it, & convert to byte[]

I use the following code to read an image from the file system and display it on the GUI:

File file = new File("image.gif");
FileInputStream in = new FileInputStream(file);
BufferedInputStream reader = new BufferedInputStream(in);
int length = reader.available();
image = new byte[length];
reader.read(image, 0, length);
reader.close();
JLabel imageLabel = new JLabel();
imageLabel.setIcon(new ImageIcon(image));

I need to allow the user to scale the image freely, and then convert the scaled image into a byte array so that it can be saved into a database.

How do I do the scaling, and how do I convert the scaled image into a byte[]?

daitt

java.awt.Graphics allow you to stretch the Image object with DrawImage method.
You can create a BufferedImage, then create a Graphics object to draw on that image, and use DrawImage to stretch the image on your BufferedImage.
Then you use the encoder to encode your bufferedimage to a file. I suppose it's a Jpeg file, then you can use com.sun.image.codec.jpeg.JPEGCodec.
http://java.sun.com/products/jdk/1.2/docs/guide/2d/api-jpeg/com/sun/image/codec/jpeg/JPEGCodec.html

Ask me if you have problem with any step.
Good luck
daitt

SreedharSanni

hi..

For scaling the ImageIcon "AffineTransform" from Graphics2D can be used.See java api..

cheers...

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Mick Barry

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ranak

you can JAI to this too.

Load image, scale it, &amp; convert to byte[]

Load image, scale it, & convert to byte[]