Online from: 2011
Subject Area: Information and Knowledge Management
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|Title:||Stepwise ratio GM (1,1) model for image denoising|
|Author(s):||Jinshuai Zhao, (Zhoukou Normal University, Zhoukou, China), Sujin Yang, (Zhoukou Normal University, Zhoukou, China), Liu Xin, (Zhoukou Normal University, Zhoukou, China)|
|Citation:||Jinshuai Zhao, Sujin Yang, Liu Xin, (2012) "Stepwise ratio GM (1,1) model for image denoising", Grey Systems: Theory and Application, Vol. 2 Iss: 1, pp.36 - 44|
|Keywords:||Dynamics stepwise ratio, GM (11) model, Grey models, Image processing, Mean square error, Noise, Peak signal-to-noise ratio, Signal detection|
|Article type:||Research paper|
|DOI:||10.1108/20439371211197659 (Permanent URL)|
|Publisher:||Emerald Group Publishing Limited|
|Acknowledgements:||The work was supported by the Youth Scientific Research Fund Project of Zhoukou Normal University (No: zknuqn201038A).|
Purpose – The purpose of this paper is to construct a novel grey filter model for image denoising and to solve the problems which exist in the image denoising filter method, in which the true intensity value of each noisy pixel cannot be predicted better.
Design/methodology/approach – Based on the definition of stepwise, the defects of traditional grey prediction models are found. A new grey filter model, named grey stepwise prediction model, is proposed. The new filter model for the image denoising is based on each noisy pixel's neighborhoods stepwise, which is the eight pixels around the noisy pixel, to predict its intensity value and to solve the problems which exist in the image denoising filter method.
Findings – The experiment results show that the improved filter model can effectively eliminate image noise, preserve the image's details and edges, increase SNR (signal-to-noise ratio) as well as PSNR (peak signal-to-noise ratio), reduce MSE (mean square error) and MAE (mean absolute error), and significantly improve the image's visual effect.
Practical implications – The new filter method exposed in the paper can be used to 8-bit gray-scale image denoising. The method can also be used to binary image denoising.
Originality/value – The paper succeeds in constructing a novel filter method for image denoding, and it is undoubtedly a new development in image recovery algorithm and grey systems theory.
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