Spatial Images Feature Extraction Based on Bayesian Nonlocal Means Filter and Improved Contourlet Transform
Joint Authors
Source
Journal of Applied Mathematics
Issue
Vol. 2012, Issue 2012 (31 Dec. 2012), pp.1-16, 16 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2012-04-24
Country of Publication
Egypt
No. of Pages
16
Main Subjects
Abstract EN
Spatial images are inevitably mixed with different levels of noise and distortion.
The contourlet transform can provide multidimensional sparse representations of images in a discrete domain.
Because of its filter structure, the contourlet transform is not translation-invariant.
In this paper, we use a nonsubsampled pyramid structure and a nonsubsampled directional filter to achieve multidimensional and translation-invariant image decomposition for spatial images.
A nonsubsampled contourlet transform is used as the basis for an improved Bayesian nonlocal means (NLM) filter for different frequencies.
The Bayesian model adds a sigma range in image a priori operations, which can be more effective in protecting image details.
The NLM filter retains the image edge content and assigns greater weight to similarities for edge pixels.
Experimental results both on standard images and spatial images confirm that the proposed algorithm yields significantly better performance than nonsubsampled wavelet transform, contourlet, and curvelet approaches.
American Psychological Association (APA)
Han, Pengcheng& Du, Junping. 2012. Spatial Images Feature Extraction Based on Bayesian Nonlocal Means Filter and Improved Contourlet Transform. Journal of Applied Mathematics،Vol. 2012, no. 2012, pp.1-16.
https://search.emarefa.net/detail/BIM-993277
Modern Language Association (MLA)
Han, Pengcheng& Du, Junping. Spatial Images Feature Extraction Based on Bayesian Nonlocal Means Filter and Improved Contourlet Transform. Journal of Applied Mathematics No. 2012 (2012), pp.1-16.
https://search.emarefa.net/detail/BIM-993277
American Medical Association (AMA)
Han, Pengcheng& Du, Junping. Spatial Images Feature Extraction Based on Bayesian Nonlocal Means Filter and Improved Contourlet Transform. Journal of Applied Mathematics. 2012. Vol. 2012, no. 2012, pp.1-16.
https://search.emarefa.net/detail/BIM-993277
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-993277