Decoding compressed image data
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United States of America Patent
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N/A
Issued Date -
Feb 20, 2003
app pub date -
May 14, 2002
filing date -
May 18, 2001
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
Image data encoded in accordance with a block transform coding scheme may be processed by estimating from the encoded image data a discontinuity threshold for detecting artificial edges introduced by the block transform coding scheme. Once the encoded image data is decoded, differences between pairs of pixels disposed along a block boundary of the decoded image may be determined. If the difference between a given pair of pixels is less than the discontinuity threshold, the given pair of pixels may be adjusted to reduce the difference below a visibility threshold, thereby improving the quality of the decoded image by reducing or eliminating blocking artifacts.
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