Axis Network Camera Jpeg mess

Question

I am trying to read the MJPGs from an Axis camera. I can get each image as a bufferedimage, but I need to also get them as a byte[] buffer. I need to pass on that byte[] buffer to other listeners. I am having a fun time trying to convert the image to a byte buffer. I have tried several examples found here and elsewhere and nothing seems to work when I try to convert the byte[] buffer back to an image via           thepic = tk.createImage(myBytebuff[]);
any assistance is appreciated!
Greg

Answer 1

When you talk about turning an image into a byte[] buffer you need to be specific about how data is formatted
in that buffer -- there are plenty of ways to do it.
Nevertheless, here is a demo where I create a series of buffered images:
1. The source image, as read.
2. intImage, which holds its data in an int[],
3. byteImage, which holds its data in a byte[]
Then I extract a byte array from byteImage and demonstrate that I can recover the image by creating
4. recovered, which is created from a databank byte[].
You should take your image and convert it to have a byte[] databank, if needed, then see if that byte[]
is the correct format for your needs.
import java.awt.*;
import java.awt.color.*;
import java.awt.image.*;
import java.io.*;
import java.net.*;
import javax.imageio.*;
import javax.swing.*;
public class BufferedImageToByteArray {
    public static void main(String[] args) throws IOException {
        URL url = new URL("http://today.java.net/jag/bio/JagHeadshot-small.jpg");
        BufferedImage source = ImageIO.read(url);
        BufferedImage intImage = convertType(source, BufferedImage.TYPE_INT_RGB);
        BufferedImage byteImage = convertType(source, BufferedImage.TYPE_3BYTE_BGR);
        byte[] data = getData(byteImage);
        BufferedImage recovered = toImage(data, source.getWidth(), source.getHeight());
        JPanel cp = new JPanel(new GridLayout(2,2));
        addImage(cp, source, "Source Image");
        addImage(cp, intImage, "TYPE_INT_RGB Image");
        addImage(cp, byteImage, "TYPE_3BYTE_BGR Image");
        addImage(cp, recovered, "Recovered Image");
        JFrame f = new JFrame("BufferedImageToByteArray");
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.setContentPane(cp);
        f.pack();
        f.setLocationRelativeTo(null);
        f.setVisible(true);
    static void addImage(Container cp, BufferedImage im, String title) {
        JLabel label = new JLabel(new ImageIcon(im));
        label.setBorder(BorderFactory.createTitledBorder(title));
        cp.add(label);
    public static BufferedImage convertType(BufferedImage source, int type) {
        if (source.getType() == type)
            return source;
        BufferedImage result = new BufferedImage(source.getWidth(), source.getHeight(), type);
        Graphics2D g = result.createGraphics();
        g.drawRenderedImage(source, null);
        g.dispose();
        return result;
    public static byte[] getData(BufferedImage image) {
        return ((DataBufferByte)(image.getRaster().getDataBuffer())).getData();
    public static BufferedImage toImage(byte[] data, int w, int h) {
        DataBuffer db = new DataBufferByte(data, data.length);
        WritableRaster raster = Raster.createInterleavedRaster(db,
            w, h, 3*w, 3, new int[]{2,1,0}, null);
        ColorSpace cs = ColorSpace.getInstance(ColorSpace.CS_sRGB);
        ColorModel cm = new ComponentColorModel(cs,
            false, false, Transparency.OPAQUE, DataBuffer.TYPE_BYTE);
        return new BufferedImage(cm, raster, false, null);