Can a JPEG compressed image be rotated without a loss in quality?

Posted by Mat on Stack Overflow See other posts from Stack Overflow or by Mat
Published on 2009-02-12T21:35:09Z Indexed on 2010/04/25 5:13 UTC
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Filed under:

graphics

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compression

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jpeg

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lossy-compression

JPEG is a lossy compression scheme, so decompression-manipulation-recompression normally reduces the image quality further for each step. Is it possible to rotate a JPEG image without incurring further loss? From what little I know of the JPEG algorithm, it naively seems possible to avoid further loss with a bit of effort. Which common image manipulation programs (e.g. GIMP, Paint Shop Pro, Windows Photo Gallery) and graphic libraries cause quality loss when performing a rotation and which don't?

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