Apparatus and methods for smoothing images
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United States of America Patent
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Aug 25, 1998
Issued Date -
N/A
app pub date -
Sep 6, 1995
filing date -
Jun 14, 1991
priority date (Note) -
Expired
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Abstract
Improved spatial, temporal, and spatio-temporal noise reduction apparatus (10) and also apparatus for noise reduction in conjunction with one or several of the following functions: edge enhancement, spatial interpolation, magnification adjustment by spatial interpolation, and dynamic range compression (DRC). An embodiment of apparatus (10) comprises an image preprocessing unit (12), an estimation gain parameter computation unit (14) and a two-directional processor (16).
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