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2002
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Reliable and fast structure-oriented video noise estimation

12 years 3 days ago
Reliable and fast structure-oriented video noise estimation
The purpose of this paper is to introduce a fast automated whitenoise estimation method which gives reliable estimates in images with smooth and textured areas. This method is a block-based method that takes image structure into account and uses a measure other than the variance to determine if a block is homogeneous. It uses no thresholds and automates the way that blockbased methods stop the averaging of block variances. The proposed method selects intensity-homogeneous blocks in an image by rejecting blocks of structure using a new structure analyzer. The analyzer used is based on high-pass operators and special masks for corners to allow implicit detection of structure and to stabilize the homogeneity estimation. For typical image 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 surveillance or broadcasts. The method performs well even in images w...
Aishy Amer, Eric Dubois, Amar Mitiche
Added 24 Oct 2009
Updated 24 Oct 2009
Type Conference
Year 2002
Where ICIP
Authors Aishy Amer, Eric Dubois, Amar Mitiche
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