How do i use a Decoder object to retrieve information about the JPEG image

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    How do i use a Decoder object to retrieve information about the JPEG image

    Hi,
    I have looked through the MSDN but looks like there is nothing there
    that tells me how to use a Decoder object and actually get information
    about a JPG image. I need to check the frame header and see what type
    of DCT the image is made with like DCT with Huffman coding or Extended
    sequential DCT with arithmetic coding.
    Any help is appreciated,
    Mars

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