Progressive JPEG decoding
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United States of America Patent
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Jul 10, 2001
Grant Date -
N/A
app pub date -
Feb 25, 1998
filing date -
Oct 6, 1997
priority date (Note) -
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Abstract
This invention enables progressively higher resolution images of a JPEG compressed image to be produced in a cost effective manner during the JPEG decompression process. The operation count is very low when images of 1/64th, 1/16th, and 1/4th of full resolution are to be produced without doing a full JPEG decompression. The low resolution images are useful for high speed search, and the ability to produce them without doing full decompression is an important factor in making such search practical.
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