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IEEE International Conference on Intelligent Computing and Intelligent Systems (ICIS)

作者： Enfang Sang Zhengyan Shen Chang Fan Yuanshou Li Underwater Acoustics Engineering College Harbin Engineering of Technology Harbin China Department of Measurement and Control Technology China Aerodynamics Research Institute of Aeronautics Harbin China

ISBN: (纸本)9781424447374;9781424447541

Sonar images are susceptible to noise pollution and the image intensities are often inhomogeneous. So there are many difficulties in sonar image segmentation. When apply the current popular region-based active contour models to sonar image segmentation, the objects we interested may be segmented inaccurately sometimes, especially for the image with shadows. To solve the problem, a simple algorithm was proposed in this paper. Firstly we analyzed the initial contour action in level set evolution, and then combined with a strict local binary fitting energy we segmented sonar images selectively by changing the initial contour. Computer experiment results show that our method is very suitable for sonar image segmentation. Target regions with weak border can be obtained perfectly. And for the sonar image with shadows, interested objects and the shadows could be distinguished separately, avoiding the boundary leaking problems caused by the shadows' existing.

关键词： Image segmentation Active contours Level set Sonar measurements Acoustical engineering Acoustic noise Optical noise Sonar detection Underwater acoustics Educational institutions

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Research on focal length determination technique of laser test system based on Talbot effect

Research on focal length determination technique of laser te...

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4th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and measurement technology and Equipment

作者： Wu, Ling-Ling Zheng, Li Wu, Guo-Jun Cang, Yu-Ping Chen, Liang-Yi Xi'an Institute of Optics and Precision Mechanics Chinese Academy of Sciences Xi'an 710119 China Graduate School of the Chinese Academy of Sciences Beijing 100039 China Measurement and Control Technology and Instrumentation School of Optoelectronic Engineering Xi'an Technological University Xi'an 710032 China Henan Institute of Metrology Zhengzhou 450008 China

ISBN: (纸本)9780819475435

A method for measuring focal length based on Talbot effect is put forward, which suits determining focal length of long-focus lens. The variation of Moiré fringes occurs after typical phase object of measuring lens is laid between two gratings. The images of fringes taken by CCD camera are processed with MATLAB. The focal length of measuring lens is figured out accurately after calculating the slope of fringes, the separation angle between two grating lines and measuring the distance between lens and the second grating. Experimental data indicate that, for a system with laser wavelength of 0.65m, measuring lens wth focal length of 420mm, the measurement accuracy is 0.10%.So this method has advantages of simple device, fast processing speed and high precision. It satisfies focal length determination of long focal-length lens used in SG-III Facility. © 2009 SPIE.

关键词： CCD cameras

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A method of optical flow computation based on LUV color space

A method of optical flow computation based on LUV color spac...

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International Conference on Test and measurement (ICTM)

作者： Xuezhi Xiang Yu Peng Lei Zhang Department of Automatic Measurement Control Harbin Institute of Technology University Harbin China Information and Communication Engineering College Harbin Engineering University Harbin China

ISBN: (纸本)9781424446995

For improving accuracy of optical flow computation, we propose a new method to compute optical flow from both gray and color information. First, the Gauss filter is used to pre-filter the color image sequence. Then optical flow recovery is based on the method of neighborhood least squares using brightness information. And the weight coefficients of local neighborhood are determined by U and V channels in LUV color space. Finally, the optical flow result is filtered by median filter. The experiment results show that the proposed method produces dense optical flow field and accuracy of the results can also be improved.

关键词： Optical computing Image motion analysis Optical filters Brightness Equations Least squares methods Color Computer vision Fluid flow measurement Space technology

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Ground water level measurements using a segmented resistance sensor

Ground water level measurements using a segmented resistance...

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IEEE Instrumentation and measurement technology Conference

作者： Xianhua Yao Ying-mei Zhang Lin Gao Wuliang Yin Juan Yang Chao Wang The Institute of Measurement and Control Technology University of Technology Taiyuan Shanxi China School of Electrical Engineering and Automation Tianjin University TJU Shanxi China School of Environment and Development University of Manchester Institute of Science and Technology UK

Ground water level measurements are very important for a wide range of applications in geosciences, agriculture, environment monitoring and mining industry. Currently, reliable and automatic ground water level measurements have not been realized. This paper presents the simulation and design of a segmented resistance sensor for measuring ground water level. Based on this sensor design, we have developed an instrument that can automatically log the ground water level. Finite element simulations were performed to optimize the sensor design and to gain insight into its response. Experimental results in the lab and field have verified the usefulness of the sensor.

关键词： Level measurement Geology Agriculture Monitoring Mining industry Electrical resistance measurement Instruments Finite element methods Design optimization Performance gain

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A Multi-Mode Sequential Flocking Strategy for Motion control of Multiple Mobile Robots in Obstacle Environment

A Multi-Mode Sequential Flocking Strategy for Motion Control...

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Joint 48th IEEE Conference on Decision and control and 28th Chinese control Conference

作者： Lei.Cheng Quan-Min.Zhu Yong-Ji.Wang the Engineering Research Center of Metallurgical Automation and Measurement Technology Ministry of Education in ChinaWuhan University of Science and Technology the Bristol Institute of Technology University of the West of England IEEE the Department of Control Science and Engineering Huazhong University of Science and Technology

Although it is relative new, flocking control has been widely attended to coordinates the motions among multiple agents or robots stably based on potential *** provide a generic and efficient solution to the local minimum problem encountered within various flocking systems in unexpected and irregular obstacle environment, this paper presents a new design of a multi-model flocking control for multiple mobile robots in terms of behavior-based *** this framework, some animal-imitating behavior modes are integrated with the new sequential flocking *** this way,the unity of stable aggregation in flocking and efficient obstacle avoidance motion can be efficiently and simultaneously *** simulation studies are comprehensively conducted to demonstrate the efficacy of the proposed procedure.

关键词： agent A Multi-Mode Sequential Flocking Strategy for Motion control of Multiple Mobile Robots in Obstacle Environment Mobile

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Smartcard-Based Secret Sharing for Secure Fingerprint Verification

Smartcard-Based Secret Sharing for Secure Fingerprint Verifi...

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International Conference on Embedded and Multimedia Computing (EM-Com)

作者： Hanna Choi Woo-yong Choi Daesung Moon Sungju Lee Yongwha Chung Sungbum Pan Department of Computer and Information Science Korea University South Korea Biometrics Technology Research Team Electronics and Telecommunications Research Institute Daejeon South Korea Division of Information Control Measurement Engineering Chosun University South Korea

Recently, in the smartcard-based authentication system, there is an increasing trend of using fingerprint for the card holder verification, instead of passwords. However, the security of the fingerprint data is particularly important as the possible compromise of the data will be permanent. To protect the fingerprint data, techniques such as "fuzzy vault" which is based on the difficulty of the polynomial reconstruction need to be developed for the smartcard-based environment. In this paper, we propose a secure and efficient approach which reconstructs a polynomial on a smartcard with the aid of a server by using fuzzy fingerprint vault distributed into the smartcard and the server. Based on the experimental results, we confirmed that our secret sharingbased approach can perform the fuzzy vault-based fingerprint verification more securely (by a factor of'300) and quickly (by a factor of 17) on a combination of a smartcard and a server.

关键词： Cryptography Fingerprint recognition Polynomials Protection Image reconstruction Authentication Data security Information science control systems Information security

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Optimization Design of Coal Mine Wireless Body Sensor Network Based on Genetic Algorithm

Optimization Design of Coal Mine Wireless Body Sensor Networ...

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International Conference on Networks Security, Wireless Communications and Trusted Computing, NSWCTC

作者： Ma Yong Yan Yu Wang Yan Liaoning Huludao Li Gang Lin Ling Institute of Science Liaoning Technical University Huludao Liaoning China Liaoning Technical University Fuxin Liaoning CN State Key Laboratory of Precision Measurement Technology and Instruments Tianjin University TJU Tianjin China Institute of Electrical & control Engineering Liaoning Technical University China

Wireless body sensor network is employed into the coal mine rescue system. We present a multi-objective optimization methodology for self-organizing, adaptive wireless sensor network design and energy management, taking into consideration application-specific requirements, communication constraints and energy-conservation characteristics. We use genetic algorithm as the optimization tool. Simulation results show that this method can optimize the power management obviously to improve the network load balance, without lacking of network characteristics that are required by the coal mine rescue system.

关键词： Design optimization Algorithm design and analysis Wireless sensor networks Body sensor networks Genetic algorithms Energy management Constraint optimization Adaptive systems Optimization methods Power system management

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Study of 3D connection method in stereo vision measurement system

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Guangdianzi Jiguang/Journal of Optoelectronics Laser 2009年第10期20卷 1332-1336页

作者： Xu, Qiao-Yu Wang, Heng-Di Che, Ren-Sheng School of Electromechanical Engineering Henan University of Science and Technology Luoyang 471003 China Department of Automatic Measurement and Control Harbin Institute of Technology Harbin 150001 China

In order to enlarge the measurement range of stereo vision measurement system and realize the accurate measurement for large-scale workpiece, a 3-D connection method is proposed based on control net. The method constructs the measurement control net based on unit quaternions with the assistant measurement control points that are set around the measured workpiece, and optimizes the measurement precise of control net with Levenberg-Marquardt (LM) optimal algorithm. Then it transforms the measurement data in the local coordinate systems of different measurement places to the global space coordinate system, obtains the global measurement data and realizes the 3D connection of the measurement data. The experiment results show that the proposed method can enlarge the measurement scope, and raise the measurement precision for large-scale workpiece.

关键词： Stereo image processing

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New technologies demonstrated at Formula Electric and Hybrid Italy 2008

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World Electric Vehicle Journal 2009年第1期3卷 160-171页

作者： Brusaglino, Giampiero Buja, Giuseppe Carello, Massimiliana Carlucci, Antonio Paolo Onder, Christopher H. Razzetti, Monica Italy Università di Padova Department of Electrical Engineering Padova Italy Politecnico di Torino Dipartimento di Meccanica Torino Italy Università del Salento Facoltà di Ingegneria CREA-Centrro Ricerca Energia e Ambiente Italy Swiss Federal Institute of Technology Zurich Measurement and Control Laboratory Switzerland Italy

From 1 to 3 October 2008 the Formula Electric and Hybrid Italy took place in the Safety Testing Center of Fiat Group Automobiles in Orbassano (TO), Italy. This fourth edition of Formula EHI, an international competitive demonstration of research outcomes from university student teams, has brought to the attention of the public and of the industry new technologies and innovative applications in the area of the systems addressing the ecological mobility. Teams from five European countries were the protagonists of the event. Several projects, components, systems and concept have been presented, related to advanced technologies for battery electric, hybrid and fuel cell vehicles. New technology hybrid, fuel cell and electric vehicles took part to the dynamic test on track for the evaluation of energy efficiency performance and dynamic behaviour. The 2008 event was a further step of the editions of Formula TECH held in the previous years and offered a benchmarking overview of the progress of the technology in the field of electrically propelled vehicles. © 2009 AVERE.

关键词： Fuel cells

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6-DOF MOTION AND CENTER OF ROTATION ESTIMATION BASED ON STEREO VISION

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Chinese Journal of Mechanical engineering 2008年第2期21卷 87-92页

作者： CAO Wanpeng BI Wei CHE Rensheng GUO Wenbo YE Dong Department of Automatic Measurement and Control Harbin Institute of Technology Harbin 150001 China China Academy of Machinery Science and Technology Beijing 100044 China Department of Electrical Engineering and Automation Harbin Institute of Technology Harbin 150001 China

A new motion model and estimation algorithm is proposed to compute the general rigid motion object＇s 6-DOF motion parameters and center of rotation based on stereo vision. The object＇s 6-DOF motion model is designed from the rigid object＇s motion character under the two defined reference frames. According to the rigid object＇s motion model and motion dynamics knowledge, the corresponding motion algorithm to compute the 6-DOF motion parameters is worked out. By the rigid object pure rotation motion model and space sphere geometry knowledge, the center of rotation may be calculated after eliminating the translation motion out of the 6-DOF motion. The motion equations are educed based on the motion model and the closed-form solutions are figured out. To heighten the motion estimation algorithm＇s robust, RANSAC algorithm is applied to delete the outliers. Simulation and real experiments are conducted and the experiment results are analyzed. The results prove the motion model＇s correction and algorithm＇s validity.

关键词： Motion estimation Center of rotation 6-DOF motion Stereo vision

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