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Adaptive threshold denoising of regularized super-resolution reconstruction procedure
PENG Zheng, CHEN Dongfang, WANG Xiaofeng
Journal of Computer Applications 2017, 37 (
7
): 2084-2088. DOI:
10.11772/j.issn.1001-9081.2017.07.2084
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620
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In order to enhance the reconstruction ability of regularized super-resolution technique for noisy image, an adaptive threshold denoising method was proposed based on the extended research of General Total Variation (GTV) regularized super-resolution reconstruction. Firstly, the iterative reconstruction was completed according to GTV regularized super-resolution reconstruction. Then, the deduced adaptive threshold matrix was used to divide GTV cost matrix of each iteration procedure by the threshold. The corresponding pixel points whose costs were less than the threshold continued to be iterated while the points whose costs were greater than the threshold were cut down for re-interpolating and canceled from the iteration of this turn. Finally, the reconstruction result was output when the program met the convergence requirement. The experimental results show that, compared with the single GTV regularized reconstruction method and adaptive parameter method, the proposed adaptive threshold denoising method accelerates the convergence rate and improves the quality of reconstruction image, which makes the regularized super-resolution reconstruction technology perform better for noisy image.
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New compression algorithm of image sequence coding based on 3-D wavelet transform
Chun-yan You Peng Zheng
Journal of Computer Applications
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1841
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To compress image sequence, a coder structure, which combines the standard 3-D wavelet transform with motion compensation, was introduced. For image sequence with slow motion, according to the characteristic of the wavelet transformed data, a new coding algorithm, which integrated the improved EZW (Embedded Zerotree Wavelets Encoding) and pixel coding, was presented. Computer simulation shows that through the method not only the computational complexity is reduced but also even when the compress ratio gets 400:1, the recovered image quality still can gain more than 29dB.
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Design of micro-communication system by UML-based object-oriented approach推
PENG Zheng,ZENG Jia-zhi
Journal of Computer Applications 2005, 25 (
03
): 528-529. DOI:
10.3724/SP.J.1087.2005.0528
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1072
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An object-oriented approach to the design and implementation of micro-communication system based on UML(Unified Modeling Language) was proposed . It can satisfy various requirements in micro-communication system, and it is visualized, vivid and legible for developers to understand and implement. Based on abstract, analysis and design, a simple model for connectionless service was also represented.
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