Image analysis – Image enhancement or restoration – Artifact removal or suppression
Reexamination Certificate
2008-03-18
2008-03-18
Alavi, Amir (Department: 2624)
Image analysis
Image enhancement or restoration
Artifact removal or suppression
C382S263000
Reexamination Certificate
active
07346226
ABSTRACT:
Disclosed herein are methods and apparatus, including computer program products, implementing and using techniques for reducing mosquito noise in an image frame of a video signal. A window of the image frame is provided. The window includes a plurality of pixel values. One of the pixel values is selected from the pixel values in the window to define a modified window of pixel value differences. A local mean (DC) value is computed based on the pixel value differences. A mosquito noise reduction value is also computed based on the pixel value differences. An artifact attenuation factor is computed as a function of a dynamic range measure of the pixel value differences. A weighted sum of the mosquito noise reduction value and the local mean value, applying the artifact attenuation factor, and the selected pixel value, is computed to generate a modified pixel value.
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Alavi Amir
Beyer & Weaver, LLP
Genesis Microchip Inc.
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