Image analysis – Image enhancement or restoration – Image filter
Patent
1996-12-18
1998-06-16
Rogers, Scott
Image analysis
Image enhancement or restoration
Image filter
382264, 382275, 358463, G06K 940, G06K 944, G06T 500, H04N 1409
Patent
active
057684405
ABSTRACT:
A method of applying noise removal to an image so that the areas having the greatest variance have the least correction. First, the variance between each image pixel and its surrounding pixels is determined. Next, for the neighborhood around each pixel, a density of variance is determined. Finally the density of variance for the neighborhood around each pixel is used to correct the original pixel, the direction of correction being toward the mean value in the surrounding pixels. The result is that relatively uniform areas of the image, within which noise is most obvious, will get the most correction and areas that are textured will get the least.
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Campanelli Michael R.
Harrington Steven J.
Cunha Robert
Rogers Scott
Xerox Corporation
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