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MIPPR 2009 - Remote Sensing and GIS Data processing and Other Applications: 6th International Symposium on Multispectral image processing and pattern recognition

作者： Li, Shidong Ding, Mingyue Cai, Chao Institute for Pattern Recognition and Artificial Intelligence National Lab. for Multi-spectral Information Processing Technologies Huazhong University of Science and Technology Wuhan 430074 China Hubei University for Nationalities Enshi Hubei 445000 China College of Life Science and Technology Image Processing and Intelligent Control Key Laboratory of Education Ministry of China Huazhong University of Science and Technology Wuhan 430074 China

ISBN: (纸本)9780819478092

It is difficult to meet both direction and curvature constraints for traditional Fast Marching (FM) method in path planning. Based on adjusting the cost function in Eiknoal equation-the control equation for FM, a new model for computing the integrated cost function was presented in this paper. A relationship formula about curvature radius was obtained and three kinds of adjusting strategies were given;two of them were used to modify the route to meet with the requires of turning constraint in this paper. Experiments showed that the improved model can be used to plan the path with FMM for agent such as unmanned aerial vehicle (UAV) or robot, which is limited to pass through the scene matching areas. And our preliminary experiments demonstrated that the strategies are feasible and efficient to obtain path with certain curvature radius. The model can also be used to represent the problem such as an aircraft flying in a flow field. © 2009 Copyright SPIE - The International Society for Optical engineering.

关键词： Motion planning

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Robust segmentation of freight containers in train monitoring videos

Robust segmentation of freight containers in train monitorin...

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IEEE Workshop on Applications of computer Vision (WACV)

作者： Qing-Jie Kong Avinash Kumar Narendra Ahuja Yuncai Liu Institute of Image Processing and Pattern Recognition Shanghai Jiaotong University Shanghai China Department of Electrical and Computer Engineering University of Illinois Urbana-Champaign Urbana IL USA

This paper is about a vision-based system that automatically monitors intermodal freight trains for the quality of how the loads (containers) are placed along the train. An accurate and robust algorithm to segment the foreground of containers in videos of the moving train is indispensable for this purpose. Given a video of a moving train consisting of containers of different types, this paper presents a method exploiting the information in both frequency and spatial domains to segment these containers. This method can accurately segment all types of containers under a variety of background conditions, e.g illumination variations and moving clouds, in the train videos shot by a fixed camera. The accuracy and robustness of the proposed method are substantiated through a large number of experiments on real data of train videos.

关键词： Robustness Freight containers Monitoring Videos image segmentation Rails Loading Clouds Cameras Lighting

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A fusion location method of multi-object and multi-style licenses plate

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Guangdianzi Jiguang/Journal of Optoelectronics Laser 2009年第9期20卷 1228-1233页

作者： Wang, Mei Su, Guang-Da Wang, Guo-Hong Laboratory of Image Processing and Pattern Recognition Yantai Vocational College Yantai 264670 China Department of Electronic Engineering Tsinghua University Beijing 100084 China Department of Electronic and Information Engineering Naval Aeronautical Engineering Institute Yantai 264001 China

In order to implement vehicle license plate (VLP) location at complex environment, a VLP fusion location method with object authenticity confirmation is presented. In this way, there are four steps. First, HSV color space feature is studied and every region connected with object color is marked in one gray-level image according to multi-gray-level for multi-style. Second, gray-level vertical edge of absolute accumulation differential image (AADI) is extracted. Third, each kind of possible object region is detected by fusion feature respectively. Last, object authenticity confirmation method based on companion and compensation is designed to throw off the false-alarm and improve the location accuracy. Various actual RGB color VLP images are used to test the proposed method. The method is suitable for multi-object and multi-style location at complex environment. The experimental results proved its effectiveness.

关键词： Object detection

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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

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Moving object detection based on blob analysis

Moving object detection based on blob analysis

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IEEE International Conference on Automation and Logistics

作者： Tao Jia Nong-liang Sun Mao-yong Cao Institute of Image Processing and Pattern Recognition College of Information & Electrical Engineering Shandong University of Science and Technology Qingdao China

ISBN: (纸本)9781424425020

A single-mode background model based on blob analysis is proposed to segment foreground from image sequences in complex environment. Firstly, the symmetric difference is used to extract a rough moving object. Secondly, blob analysis is utilized to update background model .Finally, classification strategy (block-level and frame-level) is used to extract foreground accurately and avoid the affect of noise and illumination variance. Experimental results show that the presented approach works well in the presence of complex environment and illumination variance.

关键词： Lighting Analytical models Mathematical model Pixel Adaptation model Brightness Noise

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Hardware design of quasi-cyclic low-density parity-check encoder based on a novel RC-scheme

Hardware design of quasi-cyclic low-density parity-check enc...

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2008 4th IEEE International Conference on Circuits and Systems for Communications, ICCSC

作者： Chen, Liang Yan, Shijun Zhang, Wenjun Wu, Ziyu Department of Electrical and Computer Engineering University of Maryland College Park MD 20740 United States Institute of Image Communication and Information Processing Shanghai Jiao Tong University Shanghai 200240 China NVIDIA Corporation Zhangjiang Hi-Tech Park Shanghai 201203 China

ISBN: (纸本)9781424417087

In this paper, quasi-cyclic low-density parity-check (QC-LDPC) codes are applied to a novel rate-compatible (RC) scheme for multimedia transmission. To ensure that the RC codes over the entire range of rates can be decoded by a single decoder, modified array codes in a lower triangular form are employed as the mother codes. The constructed rate-compatible QC-LDPC codes based on our novel RC-scheme can also be encoded by a single encoder. Hardware design of QC-LDPC encoder for this RC-scheme is proposed in detail. The hardware complexity is determined by the lowest-rate code for serial encoding and by the mother code for parallel encoding. Part of hardware units is disabled in certain cases to reduce power consumption. ©2008 IEEE.

关键词： Signal encoding

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Hardware Design of Quasi-Cyclic Low-Density Parity-Check Encoder Based on a Novel RC-Scheme

Hardware Design of Quasi-Cyclic Low-Density Parity-Check Enc...

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IEEE International Conference on Circuits and Systems for Communications (ICCSC)

作者： Liang Chen Shijun Yan Wenjun Zhang Ziyu Wu Department of Electrical and Computer Engineering University of Maryland College Park MD USA Institute of Image Communication and Information Processing Shanghai Jiaotong University Shanghai China NVIDIA Corporation Shanghai China

In this paper, quasi-cyclic low-density parity-check (QC- LDPC) codes are applied to a novel rate-compatible (RC) scheme for multimedia transmission. To ensure that the RC codes over the entire range of rates can be decoded by a single decoder, modified array codes in a lower triangular form are employed as the mother codes. The constructed rate-compatible QC-LDPC codes based on our novel RC- scheme can also be encoded by a single encoder. Hardware design of QC-LDPC encoder for this RC-scheme is proposed in detail. The hardware complexity is determined by the lowest-rate code for serial encoding and by the mother code for parallel encoding. Part of hardware units is disabled in certain cases to reduce power consumption.

关键词： Hardware Parity check codes Decoding Educational institutions Quantum cascade lasers Energy consumption image coding Video compression Error analysis Protection

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Blind source separation based on generalized gaussian model

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Journal of Harbin institute of Technology(New Series) 2007年第3期14卷 362-367页

作者：杨斌孔薇周越 Information Engineering College of Shanghai Maritime University Institute of Image Processing & Pattern Recognition Shanghai Jiaotong University

Since in most blind source separation(BSS)algorithms the estimations of probability density function(pdf)of sources are fixed or can only switch between one sup-Gaussian and other sub-Gaussian model,they may not be efficient to separate sources with different *** to solve the problem of pdf mismatch and the separation of hybrid mixture in BSS,the generalized Gaussian model(GGM)is introduced to model the pdf of the sources since it can provide a general structure of univariate *** great advantage is that only one parameter needs to be determined in modeling the pdf of different sources,so it is less complex than Gaussian mixture *** using maximum likelihood(ML)approach,the convergence of the proposed algorithm is *** computer simulations show that it is more efficient and valid than conventional methods with fixed pdf estimation.

关键词： blind source separation Independent Component Analysis Generalized Gaussian Model Maxi- mum Likelihood

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A services selection policy for ServiceBSP model with QoS-aware in Grids

A services selection policy for ServiceBSP model with QoS-aw...

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2nd International Conference on Convergent information Technology, ICCIT 07

作者： Jiang, Yan Tong, Weiqin Zhao, Wentao School of Computer Engineering and Science Shanghai University Image Processing and Pattern Recognition Institute Shanghai Jiao Tong University Shanghai China

ISBN: (纸本)0769530389

ServiceBSP model is presented as an extension of BSP model with a view to the advantages of BSP model in Grid environment where large-scale and geographically distributed resources (abstracted as services) are available. In this paper, we advocate a preferable Service Broker Framework to support the services selection policy that could optimize the services selection for ServiceBSP model. It means that the services selection can increase the level of satisfaction measured by overall quality value and decrease execution time by considering services dependent relation and location in a subtask group. Meanwhile, the policy is preliminary work ensuring reasonable distribution of services and loading balance in ServiceBSP model. In an addition, we give a detailed process of services selection based on heuristic greedy algorithm. Finally, by comparing response time and price using proposed policy with other policy only considering QoS, the experimental simulation shows that our services selection policy possesses superior performance on response time and then provides satisfactory result for users. © 2007 IEEE.

关键词： Grid computing

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Wall-pasted cells segmentation based on active contour models and Gabor filters

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Guangdianzi Jiguang/Journal of Optoelectronics Laser 2007年第10期18卷 1255-1259页

作者： Liu, Ying-Qian Cao, Mao-Yong Sun, Nong-Liang Institute of Image Processing and Pattern Recognition College of Information and Electrical Engineering Shandong University of Science and Technology Qingdao 266510 China

In order to segment cells images accurately and efficiently we combine the model proposed by Tony F. Chan with Gabor filter. The model proposed by Tony F. Chan can detect very weak boundary based on function energy instead of the gradient. Gabor filter can enhance the cells boundaries in different angle and denoise the image. In the experiments, we firstly use Gabor filter to enhance the image with different angle, and then fuse the enhanced images to get better images. At last we use the active contour model to the fused image. The result shows the model we proposed is better than the model which dose not use Gabor filter.

关键词： Cells

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