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Novel wavelet-based image interpolations in lifting structures for image resolution enhancement

[+] Author Affiliations
Shu-Mei Guo

National Cheng Kung University, Department of Computer Science and Information Engineering, Tainan 701, Taiwan

Bo-Wen Lai

National Cheng Kung University, Department of Computer Science and Information Engineering, Tainan 701, Taiwan

Yi-Cheng Chou

National Cheng Kung University, Department of Computer Science and Information Engineering, Tainan 701, Taiwan

Chin-Chang Yang

National Cheng Kung University, Department of Computer Science and Information Engineering, Tainan 701, Taiwan

J. Electron. Imaging. 20(3), 033007 (August 16, 2011). doi:10.1117/1.3606587
History: Received August 18, 2010; Revised June 03, 2011; Accepted June 08, 2011; Published August 16, 2011; Online August 16, 2011
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We propose novel 5/3 and 9/7 wavelet-based image interpolations in lifting structures with/without involving the evolutionary programming (EP) for image resolution enhancement, respectively. On the basis of the low-band wavelet coefficients, the proposed prediction algorithms estimate high-frequency wavelet coefficients of the original image, so that the original image can be reconstructed from the low-band wavelet coefficients by using the proposed prediction algorithms. Because of the characteristics of the odd-length wavelet filter, which is dominated by the intermediate coefficients, taking even or odd downsampling of the filtered coefficients significantly dominates the image reconstruction performance. Therefore, constructing the low-band wavelet coefficients through the odd-length wavelet filter in lifting structures based on even and odd pixels of the original image are respectively performed. Then, the better one, which yields a high-performance image resolution enhancement, is selected. To further improve the reconstruction performance and show the optimality of the above-mentioned proposed algorithms, we also present the EP-based image interpolations. The proposed prediction algorithms with/without EP outperform other standard methods.

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© 2011 SPIE and IS&T

Citation

Shu-Mei Guo ; Bo-Wen Lai ; Yi-Cheng Chou and Chin-Chang Yang
"Novel wavelet-based image interpolations in lifting structures for image resolution enhancement", J. Electron. Imaging. 20(3), 033007 (August 16, 2011). ; http://dx.doi.org/10.1117/1.3606587


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