Image compression by optimal reconstruction
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United States of America Patent
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Jul 9, 1996
Grant Date -
N/A
app pub date -
May 2, 1994
filing date -
May 2, 1994
priority date (Note) -
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Abstract
A method of producing a video image from a compressed version of a source video image which has been compressed by transforming to a transform domain and quantizing the source video image in accordance with quantization constraints, including back-transforming from the transform domain and dequantizing the compressed version to produce a decompressed video image, reducing total variation in the first decompressed video image to produce a reduced variation image, transforming the reduced variation image to produce a revised transform and conforming the revised transform with the quantization constraints of the compressed version so as to produce a constrained transform, and back-transforming the constrained transform so as to produce a replica of the source video image.
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