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A Coding Scheme for Noisy Image Based on Layer Segmentation

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Chinese Journal of Electronics 2016年第4期25卷 700-705页

作者： LI Tao tian Xin XIONG Chengyi tian jinwen Nanjing Research Institute of Electronics Technology Wuhan University South–Central University for Nationalities Huazhong University of Science and Technology

Heavy noises distribute in the images when imaging in a poor *** randomness of noises makes pixels distributing singularly,which weakens the1-D piecewise smooth property of original ***,wavelets-based compression method no longer works *** this paper,a layer segmentation based compression scheme is proposed for gray *** textures and some high frequency noises are described in a high frequency layer while the coarse part of the image is described in the low frequency *** high frequency layer is represented by a joint dictionary,and the low frequency layer is coded with the traditional *** proposed scheme is tested on nature images and synthetic *** results show that the proposed scheme achieves better rate-distortion performance compared with several competing compression ***,further degradation of edges is avoided by the proposed compression scheme.

关键词： Image coding Noisy image model Sparse representation Edge detection

Fast Implementation for the Singular Value and Eigenvalue Decomposition Based on FPGA

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Chinese Journal of Electronics 2017年第1期26卷 132-136页

作者： ZHANG Shuiping tian Xin XIONG Chengyi tian jinwen MING Delie School of Computer Science and Engineering Wuhan Institute of Technology School of Electronic Information Wuhan University School of Electronic and Information Engineering South-central University for Nationalities School of Automation Huazhong University of Science and Technology

A fast and efficient hardware implementation for computing the Singular value decomposition(SVD) and Eigenvalue decomposition(EVD) is *** that the SVD and EVD are complex and expensive operations, to achieve high performance with low computing complexity, our approach takes full advantage of the combination of parallel and sequential computation, which can increase efficiently the hardware utilization. Besides, regarding to EVD, we propose a hardware solution of a simplified Coordinate rotation digital computer(CORDIC)-like algorithm which can obtain higher speed. The performance analysis and comparison results show that the proposed methods can be realized on Filedprogrammable gate arrays(FPGAs) with less computation time by using systolic array. It will be shown that the proposed implementation could be an efficient alternative for real-time applications.

关键词： SVD EVD Jacobi CORDIC FPGA

Low complexity reconfigurable architecture for the 5/3 and 9/7 discrete wavelet transform

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Journal of Systems Engineering and Electronics 2006年第2期17卷 303-308页

作者： Xiong Cheng yi tian jinwen Liu Jian Coll. of Electronic Information Engineering South Center Univ. for Nationalities Wuhan 430074 P.R. China Inst. of Pattern Recognition & Artificial Intelligence Key Lab. of Education Ministry for Image Processing and Intelligent Control Huazhong Univ. of Science & Technology Wuhan 430074 P.R. China

Efficient reconfigurable VLSI architecture for 1-D 5/3 and 9/7 wavelet transforms adopted in JPEG2000 proposal, based on lifting scheme is proposed. The embedded decimation technique based on fold and time multiplexing, as well as embedded boundary data extension technique, is adopted to optimize the design of the architecture. These reduce significantly the required numbers of the multipliers, adders and registers, as well as the amount of accessing external memory, and lead to decrease efficiently the hardware cost and power consumption of the design. The architecture is designed to generate an output per clock cycle, and the detailed component and the approximation of the input signal are available alternately. Experimental simulation and comparison results are presented, which demonstrate that the proposed architecture has lower hardware complexity, thus it is adapted for embedded applications. The presented architecture is simple, regular and scalable, and well suited for VLSI implementation.

关键词： VLSI discrete wavelet transform lifting scheme embedded decimation reeonfigurable.

High performance word level sequential and parallel coding methods and architectures for bit plane coding

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Science in China(Series F) 2008年第4期51卷 337-351页

作者： XIONG ChengYi tian jinwen LIU Jian College of Electronic Information Engineering South-Central University for Nationalities Wuhan 430074 China Institute of Pattern Recognition & Artificial Intelligence Key Laboratory of Education Ministry for Image Processing and Intelligent Control Huazhong University of Science & Technology Wuhan 430074 China

This paper introduced a novel high performance algorithm and VLSI architectures for achieving bit plane coding （BPC） in word level sequential and parallel mode. The proposed BPC algorithm adopts the techniques of coding pass prediction and parallel ＆ pipeline to reduce the number of accessing memory and to increase the ability of concurrently processing of the system, where all the coefficient bits of a code block could be coded by only one scan. A new parallel bit plane architecture （PA） was proposed to achieve word-level sequential coding. Moreover, an efficient high-speed architecture （HA） was presented to achieve multi-word parallel coding. Compared to the state of the art, the proposed PA could reduce the hardware cost more efficiently, though the throughput retains one coefficient coded per clock. While the proposed HA could perform coding for 4 coefficients belonging to a stripe column at one intra-clock cycle, so that coding for an NxN code-block could be completed in approximate N2/4 intra-clock cycles. Theoretical analysis and experimental results demonstrate that the proposed designs have high throughput rate with good performance in terms of speedup to cost, which can be good alternatives for low power applications.

关键词： bit plane coding high performance word-level sequential multi-word parallel

Sealed model and computation of hazardous waste landfill high voltage DC leakage detection

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High Technology Letters 2015年第4期21卷 457-464页

作者：杨萍 tian jinwen Wang Yanni Xue Lin School of Information Beijing Union University

According to the structural characteristics of hazardous waste landfill and the leakage current model of high voltage DC Landfill leakage detection, a sealed model is established detail. The detection layer of the hazardous waste landfill is considered as a sealed assumed that the source current flows through the leak entirely. The leak is regard and analyzed in space and it is ed as a positive current resource ＋ I located at the current entrance or a negative resource - I located at the current exit, which depends on the placement of the current supply. The electrical potential of an arbitrary in detection layer satisfies Poisson equation. The boundary condition is regarded as a natural bound- ary condition for the high resistivity of high density polyethylene （HDPE） membrane. Based on which a numerical calculation method is developed. Satisfactory agreement between experimental da- ta and simulated data validates the analysis. Parametric studies show that a larger horizontal distance between the power supply electrode and leak and a smaller distance between the detector electrodes and the detected liner are helpful to leak location. More parametric curves show that parameters leaks can be detected effectively with optimum selection of field survey.

关键词： hazardous waste landfill high voltage DC method sealed space model

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特征解耦和实例分割的遥感影像近岸舰船检测

计算机与数字工程 2024年第7期52卷 2161-2166,2182页

作者：袁思佳王悦行吴思路田金文华中科技大学人工智能与自动化学院武汉430074 多谱信息处理技术国家级重点实验室武汉430074 天津津航技术物理研究所天津300308

针对光学遥感图像中近岸舰船目标检测的难题,提出了一种基于特征解耦和实例分割的深度学习舰船检测方法。通过自适应特征金字塔自动学习融合多尺度上下文,增强网络提取特征能力;采用边界特征解耦网络,引入边界先验知识,减少舰船紧密排... 详细信息

针对光学遥感图像中近岸舰船目标检测的难题,提出了一种基于特征解耦和实例分割的深度学习舰船检测方法。通过自适应特征金字塔自动学习融合多尺度上下文,增强网络提取特征能力;采用边界特征解耦网络,引入边界先验知识,减少舰船紧密排布带来的漏检问题和港口与舰船相似带来的虚警问题,提升了网络检测性能;通过中心点预测对网络结果做进一步分割,进一步提高了舰船检测的精确度。在自建遥感近岸舰船检测数据集上的实验表明,论文方法优于传统的锚框方法,具有更好的检测性能。论文算法有效提高了近岸舰船目标检测的精确度,对复杂背景下近岸舰船的检测具有参考价值。

关键词：光学遥感图像近岸舰船目标检测深度学习实例分割特征解耦

A FIRST-HAND ACCOUNT OF ECOLOGICAL PRESERVATIO IN TIBET

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China's Tibet 2020年第3期31卷 46-54页

作者： Zhang Jingpin tian jinwen 不详

The snowy plateau in March seems to be waking up after a long wintry slumber as a warm breeze passes over the *** and vivid are two appropriate terms to describe the expanse from the mountainous park toward the south ... 详细信息

关键词： mountainous plateau forest

Image Denoising Using Local Adaptive Least Squares Support Vector Regression

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Geo-Spatial Information Science 2007年第3期10卷 196-199页

作者： WU Dingxue PENG Daiqiang tian jinwen Institute for Pattern Recognition and Artificial Intelligence Huazhong University of Science and Technology 1037 Luoyu Road Wuhan430074 China. 不详

Rather than attempting to separate signal from noise in the spatial domain, it is often advantageous to work in a transform domain. Building on previous work, a novel denoising method based on local adaptive least squares support vector regression is proposed. Investigation on real images contaminated by Gaussian noise has demonstrated that the proposed method can achieve an acceptable trade off between the noise removal and smoothing of the edges and details.

关键词： least square support vector machines image denoising

Los caminos del cielo

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今日中国（西文版） 2022年第7期 21-23页

作者： LIU HONGMING tian jinwen 不详