Global and local statistics controlled noise reduction system

Details Global and local statistics controlled noise reduction system Global and local statistics controlled noise reduction system

2008-01-08

2008-01-08

Wu, Jingge (Department: 2624)

Image analysis

Image enhancement or restoration

Image filter

C382S275000

Reexamination Certificate

active

10697362

ABSTRACT:
A global and local statistics controlled noise reduction system in which the video image noise reduction processing is effectively adaptive to both image local structure and global noise level. A noise estimation method provides reliable global noise statistics to the noise reduction system. The noise reduction system dynamically/adaptively configures a local filter for processing each image pixel, and processes the pixel with that local filter. The filtering process of the noise reduction system is controlled by both global and local image statistics that are also computed by the system.

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S.I. Olsen,Noise Variance Estimation in Images: An Evaluation, Graphical Models and Image Processing, University of Copenhagen, Department of Computer Science, vol. 55, No. 4, pp. 319-323, 1993.

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