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    Rotating Jpegs in compressed domain


    Hi all,

    I am looking for an algorithm that provides the possibility to rotate a jpeg image without decompressing it. Did anyone ever hear of such an algorithm?

    Thanks in advance,
    a LostBoy
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    You will always need to decompress. Is the issue that you wish to perform the rotation in memory rather than writing to a temporary file?
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    I need to rotate an image in an embedded system. Therefore we have some memory constraints which do not allow to keep the (decompressed) image in memory as a whole. I wonder if it would be possible to decode the Huffmann part and then rotate and reorder each block with its DCT coefficients.
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    In that case, no idea. Sorry and good luck!
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    thx

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