Image analysis – Image enhancement or restoration – Artifact removal or suppression
Reexamination Certificate
2011-07-19
2011-07-19
Strege, John (Department: 2624)
Image analysis
Image enhancement or restoration
Artifact removal or suppression
C382S266000
Reexamination Certificate
active
07983511
ABSTRACT:
Methods and apparatus for reducing or removing noise in digital images. Image noise reduction methods are described that may be applied to grayscale and color images, for example RGB images. An image noise reduction method may, before applying a noise filtering technique, transform the image values from linear space to flat noise space in which the noise is independent of the signal. An edge-preserving noise filtering technique may then be applied to the image in flat noise space. After noise filtering is applied, the image is transformed from flat noise space back to linear space. For color images, the flat noise space may be converted from linear color space to luminance-chrominance space before applying the noise filtering technique so that different filters can be applied to luminance and color channels. After applying the noise filtering technique, the image is converted back to linear color space.
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Adobe Systems Incorporated
Kowert Robert C.
Meyertons Hood Kivlin Kowert & Goetzel P.C.
Strege John
Wang Claire
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