Video noise reduction

Details Video noise reduction Video noise reduction

2007-06-19

2011-10-04

Bhatnagar, Anand (Department: 2624)

Image analysis

Image enhancement or restoration

Artifact removal or suppression

C382S261000, C382S264000, C348S607000, C348S606000, C348S701000, C348S533000

Reexamination Certificate

active

08031967

ABSTRACT:
A video noise reduction technique is presented. Generally, the technique involves first decomposing each frame of the video into low-pass and high-pass frequency components. Then, for each frame of the video after the first frame, an estimate of a noise variance in the high pass component is obtained. The noise in the high pass component of each pixel of each frame is reduced using the noise variance estimate obtained for the frame under consideration, whenever there has been no substantial motion exhibited by the pixel since the last previous frame. Evidence of motion is determined by analyzing the high and low pass components.

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