Rotated read-out of JPEG compressed images
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United States of America Patent
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Aug 27, 2002
Grant Date -
Aug 30, 2001
app pub date -
Sep 17, 1998
filing date -
Sep 17, 1998
priority date (Note) -
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Abstract
This invention is a method and apparatus for processing compressed digital images. More particularly, this invention relates to methods and apparatus which accomplish rotation in conjunction with a variable-length decompression operation. A small amount of auxiliary information consisting of pointers to the starts of the scanlines is stored along with the DC coefficients in the decompressor, instead of the compressed image, to reduce the memory requirements for orthogonally rotating an image.
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