Question

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Getting pixel data from an image using java

I was already browsing the web for quite some time, but didn’t find any suitable answer, so I would be very happy if someone here could help me 🙂

I have a Byte array which is filled with image data encoded as JPEG. Now I would like to know how to convert the data to the corresponding BGR data of the image and store it in a byte array as well.

Thank you very much in advance, your help is really appreciated!

Answer 1

You could try this:

    ByteArrayInputStream input = new ByteArrayInputStream(byteArray);
    ByteArrayOutputStream output = new ByteArrayOutputStream();
    BufferedImage image = ImageIO.read(input); 
    ImageIO.write(image, "bmp", output);  
    byte[] outputBytes = output.toByteArray();