Adaptive Sampling Rate Assignment for Block Compressed Sensing of Images Using Wavelet Transform

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Adaptive Sampling Rate Assignment for Block Compressed Sensing of Images Using Wavelet Transform

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Title: Adaptive Sampling Rate Assignment for Block Compressed Sensing of Images Using Wavelet Transform
Author(s):
Xin, L.;
Junguo, Z.;
Chen, Chen;
Fantao, L.
Date Created: 2015-06-06
Item Type: article
Keywords: Adaptive sampling (Statistics)
Compressed sensing (Telecommunication)
Digital images
Wavelets (Mathematics)
Abstract: Compressed sensing theory breaks through the limit that two times the bandwidth of the signal sampling rate in Nyquist theorem, providing a guideline for new methods for image acquisition and compression. For still images, block compressed sensing (BCS) has been designed to reduce the size of sensing matrix and the complexity of sampling and reconstruction. However, BCS algorithm assigns the same sampling rate for all image blocks without considering the structures of the blocks. In this paper, we present an adaptive sampling rate assignment method for BCS of images using wavelet transform. Wavelet coefficients of an image can reflect the structure information. Therefore, adaptive sampling rates are calculated and assigned to image blocks based on their wavelet coefficients. Several standard test images are employed to evaluate the performance of the proposed algorithm. Experimental results demonstrate that the proposed algorithm provides superior performance on both the reconstructed image quality and the visual effect.
Publisher: Bentham Science Publishers B.V.
ISSN: 1874-110X
Persistent Link: http://hdl.handle.net/10735.1/5639
Bibliographic Citation: Xin, L., Z. Junguo, C. Chen, and L. Fantao. 2015. "Adaptive sampling rate assignment for block compressed sensing of images using wavelet transform." Open Cybernetics and Systemics Journal 9: 683-689.
Terms of Use: CC BY-NC 4.0 (Attribution-NonCommercial)
©2015 The Authors. All Rights Reserved.
Sponsors: "This work was funded by Beijing Higher Education Young Elite Teacher Project (Grant No.YETP0760), Fundamental Research Funds for the Central Universities (Grant No.TD2013-3) and Import Project under China State Forestry Administration (Grant No.2014-4-05).

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CC BY-NC 4.0 (Attribution-NonCommercial) Except where otherwise noted, this item's license is described as CC BY-NC 4.0 (Attribution-NonCommercial)