Pulse or digital communications – Bandwidth reduction or expansion – Television or motion video signal
Reexamination Certificate
2011-03-08
2011-03-08
Liu, Shuwang (Department: 2611)
Pulse or digital communications
Bandwidth reduction or expansion
Television or motion video signal
C375S240040, C375S240120, C375S240160, C375S240260, C375S240290
Reexamination Certificate
active
07903733
ABSTRACT:
This disclosure describes adaptive filtering techniques to improve the quality of captured imagery, such as video or still images. In particular, this disclosure describes adaptive filtering techniques that filter each pixel as a function of a set of surrounding pixels. An adaptive image filter may compare image information associated with a pixel of interest to image information associated with a set of surrounding pixels by, for example, computing differences between the image information associated with the pixel of interest and each of the surrounding pixels of the set. The computed differences can be used in a variety of ways to filter image information of the pixel of interest. In some embodiments, for example, the adaptive image filter may include both a low pass component and high pass component that adjust as a function of the computed differences.
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El-Maleh Khaled Helmi
Li Hsiang-Tsun
Panda Prasanjit
Liu Shuwang
Loomis Timothy F.
Patel Dhaval
Qualcomm Incorporated
Rickenbrode John G.
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