Fast and reliable structure-oriented video noise estimation

Noise can significantly impact the effectiveness of video processing algorithms. This paper proposes a fast white-noise variance estimation that is reliable even in images with large textured areas. This method finds intensity-homogeneous blocks first and then estimates the noise variance in these b...

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Bibliographic Details
Published in:IEEE transactions on circuits and systems for video technology 2005-01, Vol.15 (1), p.113-118
Main Authors: Amer, A., Dubois, E.
Format: Article
Language:English
Subjects:
Adaptive variance averaging
Additive noise
Applied sciences
Charge coupled devices
Circuit noise
Detection, estimation, filtering, equalization, prediction
Digital cameras
Exact sciences and technology
homogeneous regions
Information, signal and communications theory
Miscellaneous
Noise generators
PSNR
Satellite broadcasting
second-order operators
Signal and communications theory
Signal processing
Signal, noise
structure analyzers
Telecommunications and information theory
textured regions
video enhancement
video noise estimation
White noise
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Summary:Noise can significantly impact the effectiveness of video processing algorithms. This paper proposes a fast white-noise variance estimation that is reliable even in images with large textured areas. This method finds intensity-homogeneous blocks first and then estimates the noise variance in these blocks, taking image structure into account. This paper proposes a new measure to determine homogeneous blocks and a new structure analyzer for rejecting blocks with structure. This analyzer is based on high-pass operators and special masks for corners to stabilize the homogeneity estimation. For typical video quality (PSNR of 20-40 dB), the proposed method outperforms other methods significantly and the worst-case estimation error is 3 dB, which is suitable for real applications such as video broadcasts. The method performs well both in highly noisy and good-quality images. It also works well in images including few uniform blocks.
ISSN:1051-8215
1558-2205
DOI:10.1109/TCSVT.2004.837017