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Dynamic wide-area scene visualization using an active camera

Systems and computers in Japan 2006年第8期37卷 101-112页

作者： Tokai, Shogo Yumiba, Ryo Wu, Xiaojun Matsuyama, Takashi Faculty of Engineering University of Fukui Fukui 910-8507 Japan Graduate School of Informatics Kyoto University Kyoto 606-8501 Japan Department of Information Science Faculty of Engineering University of Fukui Information Processing Society of Japan Hitachi Research Institute of Hitachi Ltd. Cyber Space Laboratories Department of Intelligence Science and Technology Graduate School of Informatics Kyoto University International Association for Pattern Recognition IEICE Japanese Society for Artificial Intelligence IEEE Computer Society

This paper will discuss a method for presenting a surveillance image captured by an active camera such as one that actively tracks a moving subject as an image that is easily understood by an observer. Active camera surveillance images generally have a narrow field of view, and changes in the line-of-sight direction of an automatic camera make it difficult for an observer to intuitively understand the scene. However, enhancement of the observer's ability to comprehend the scene can be anticipated by adding a wide-angle panoramic image to the periphery of the narrow-field observed image and presenting it as an image that has a wider field of view. In order for an observer to understand conditions in a remote location, the observed image and the panoramic image must be integrated with geometric/photometric consistency. The present paper will discuss a method of geometric integration using a fixed-viewpoint camera, and a method of photometric integration by modeling of brightness variation by eigenimage analysis. © 2006 Wiley Periodicals, Inc.

关键词： Cameras

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Development of a virtual needle biopsy simulation system for the virtual prostate

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Systems and computers in Japan 2006年第1期37卷 93-104页

作者： Deguchi, Daisuke Mori, Kensaku Mekada, Yoshito Hasegawa, Jun-Ichi Toriwaki, Jun-Ichiro Noguchi, Masanori Graduate School of Engineering Nagoya University Nagoya 464-8603 Japan School of Computer and Cognitive Sciences Chukyo University Toyota 470-0393 Japan School of Medicine Department of Urology Kurume University Kurume 830-0011 Japan Faculty of Information Science Chukyo University Graduate School of Information Science Nagoya University Leice IEEE Japanese Society of Biomedical Engineering Japanese Society of Medical Imaging Technology Japan Medical Image Engineering Society Computer-Assisted Diagnostics Society School of Life System Science and Technology IPSJ JSAI JSMEBE JAMIT CADM JSSF IEEE CS Chukyo University Nagoya University Information Processing Society Computer-Assisted Image Diagnostics Society Department of Urology Japanese Urological Association Japan Society of Clinical Oncology Japan Cancer Society Japanese Society of Endourology and ESWL European Urological Association American Urological Association

This paper discusses the virtual prostate needle biopsy system and the construction of the virtual prostate model, considering the actual distribution of prostate abnormalities. A needle biopsy simulation is performed for the constructed virtual prostate, and the actual biopsy procedure in the clinical situation is evaluated. The prostate needle biopsy is a histologic diagnosis procedure in which a sample is acquired from the prostate tissue by needle biopsy and is inspected under a microscope. In order to achieve reliable prostate needle biopsy, it is necessary to consider systematically and numerically the number of needles required, and their locations and insertion angles. For such a purpose, a system is developed in which a virtual prostate is constructed on a computer and the biopsy procedure is evaluated quantitatively by performing virtually the prostate needle biopsy. Furthermore, two different models are constructed, for the prostate with and without hypertrophy, based on the actual statistical distribution data for prostate abnormalities. Each model is partitioned into the peripheral zone and the transition zone. The constructed virtual prostate is input into the virtual needle biopsy simulation system, and three different systematic biopsy procedures actually used at clinical sites, and four different needle biopsy procedures, are experimentally evaluated. The experiments show that the insertion angle that maximizes the hit probability is not always the same as the insertion angle that maximizes cancer sample acquisition. It is evident that the proposed method can indicate a biopsy procedure which realizes a high hit probability with a small number of needles. © 2005 Wiley Periodicals, Inc.

关键词： Biopsy

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Fabrication and characterization of GaAs/AlGaAs planar resonant tunneling transistor

Fabrication and characterization of GaAs/AlGaAs planar reson...

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IEEE Nanotechnology Materials and Devices Conference (NMDC)

作者： SeungHun Son JungIl Lee YongJu Park YunSeop Yu SungWoo Hwang Doyal Ahn Departmentof Electronics & Computer Engineering Korea University Seoul South Korea Semiconductor Materials Laboratory Nano Device Research Center Korea Institute of Science and Technology Seoul South Korea Department of Information & Control Engineering Hankyong National University Anseong Gyeonggi South Korea Institute of Quantum Information Processing & Systems University of Seoul Seoul South Korea

We have demonstrated electron transport in enhancement mode in-plane-gate (IPG) quantum dot (QD) transistors. A deep etched trench allows a large positive bias on the IPG, with negligible leakage current. Such enhancement mode operation has made it possible to populate ultra-small QDs with electrons. Strong NDR peaks and SET are observed in a wide gate bias window. The position of the NDR peaks systematically moves with the change of gate bias until, and also after the SET regime is reached. The size of the QD is estimated from the SET data, giving quantum energy level spacing consistent with the evolved NDR positions.

关键词： Fabrication Gallium arsenide Resonant tunneling devices Capacitance Quantum computing Electrons Etching Transistors Quantum dots Energy states

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制革厂固、液副产物的处理(英文)

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皮革科学与工程 2006年第1期16卷 3-9页

作者： P.Mokrejs D.Janacova K.Kolomaznik M.Mladek F.Langmaier Tomas Bata University Facultyof TechnologyDepartment of Protein and Leathernam.TGM275762 72ZlinThe Czech Republic Tomas Bata University Facultyof AppliedInformaticsInstitute of Processing Control and Applied Computer ScienceNadStranemi4511760 05ZlinThe Czech Republic

制革工艺将原料皮变成革,属于典型的工业领域,在工艺处理过程中要考虑产生的固、液副产物对环境尤其是水和土壤的污染。制革的固、液副产物分别是铬屑和含铬废液。为了减少蛋白原料的损失以及降低循环废液铬复合物的含量,循环的固体副产... 详细信息

制革工艺将原料皮变成革,属于典型的工业领域,在工艺处理过程中要考虑产生的固、液副产物对环境尤其是水和土壤的污染。制革的固、液副产物分别是铬屑和含铬废液。为了减少蛋白原料的损失以及降低循环废液铬复合物的含量,循环的固体副产物(铬屑)通过酶水解可以达到既经济又环保的处理过程。产生的溶于水的水解产物,可以作为肥料的有效成份、涂层材料以及用于胶粘剂混合物中的添加剂、耐腐蚀的材料等。液体副产物(鞣液)中的有用固体残留物,通过酶水解,可以降低废液中的铬含量。去铬要求废液中的铬吸附在铬泥上,这种处理方法高效、简单,投资少,并且去铬液对环境的危害也小得多。

关键词：副产物酶水解去铬工艺

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Fast DCT-I, DCT-III, and DCT-IV via Moments

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Eurasip Journal on Applied Signal processing 2005年第12期2005卷 1902-1909页

作者： Liu, J.G. Liu, Y.Z. Wang, G.Y. Key Laboratory of Education Huazhong University of Science and Technology Ministry for Image Processing and Intelligence Control Wuhan 430074 China Department of Computer Science and Engineering China University of Geosciences Wuhan 430074 China Key Laboratory of State Education Ministry for Image Processing and Intelligent Control Huazhong University of Science and Technology China Institute of Pattern Recognition and Artificial Intelligence Huazhong University of Science and Technology China

This paper presents a novel approach to compute DCT-I, DCT-III, and DCT-IV. By using a modular mapping and truncating, DCTs are approximated by linear sums of discrete moments computed fast only through additions. This enables us to use computational techniques developed for computing moments to compute DCTs efficiently. We demonstrate this by applying our earlier systolic solution to this problem. The method can also be applied to multidimensional DCTs as well as their inverses. © 2005 Hindawi Publishing Corporation.

关键词： Method of moments

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A Local Image Interpolation Method Based On Gradient Analysis

A Local Image Interpolation Method Based On Gradient Analysi...

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2005 International Conference on Neural Networks and Brain(ICNN&B’05)

作者： Tian Yan Liu Bin Li Tao Department of electronic and information engineering Huazhong University of Science & Technology School of computer science and technology Huazhong University of Science & Technology Key Laboratory of Education Ministry for Image Processing and Intelligent Control Huazhong University of Science & Technology

ISBN: (纸本)0780394224

Image interpolation has been widely used and studied in the fields of image *** the different complexities along the different directions,a novel image interpolation method based on gradient analysis is presented in this ***,for each point that need to be interpolated,it's the gradient values along the horizontal and vertical directions are estimated ***,different interpolation methods are carried out along these two directions according to the gradient values,that is a higher order interpolation method is applied if the gradient value is greater than certain threshold;otherwise,a lower order interpolation method is *** method gives an attention to the precision and complexity of interpolation procedure. Experimental results show that the proposed method is feasible and promising.

关键词： Gradient image interpolation root mean square error

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Support vector machines for face recognition

Support vector machines for face recognition

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2nd Indian International Conference on Artificial Intelligence, IICAI 2005

作者： Hareesha, K.S. Gangashetty, Suryakanth V. Ramaswamy, V. Department of Computer Science and Engineering Image Processing Laboratory Bapuji Institute of Engineering and Technology Davangere - 577 004 Karnataka India

ISBN: (纸本)0972741216

Face recognition is one of the challenging problems in human-computer interaction. An automated face recognition system requires an efficient method for detection of face region in the image sequence, extraction of facial features, and construction of a recognition model. In recent years, support vector machines (SVMs) have demonstrated excellent performance in a variety of pattern recognition problems. In this paper, we apply SVMs for face recognition (recognition model). Multi-class recognition system using SVMs are built using onc-against-the-rest approach. In this approach, one SVM model is built for each persons face (class). For each SVM model an optimal hyperplane is constructed in the kernel feature space to separate the examples of a class from the examples of all the other classes. SVMs learn the boundary regions between patterns of two classes by mapping the patterns into a higher dimensional space, and seeking a separating hyperplane, so as to maximize its distance from the closest training examples. SVM based approach for face recognition has been demonstrated for partial CMU face data base. The face recognition system is evaluated on faces of 10 different persons. For each person there arc 75 faces. The results of our studies show that, the system gives about 100% detection rate. Copyright © IICAI 2005.

关键词： Support vector machines

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A generalized algorithm for the generation of correlated Rayleigh fading envelopes in wireless channels

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Eurasip Journal on Wireless Communications and Networking 2005年第5期2005卷 801-815页

作者： Tran, Le Chung Wysocki, Tadeusz A. Mertins, Alfred Seberry, Jennifer School of Electrical Computer and Telecommunications Engineering University of Wollongong Wollongong NSW 2522 Australia School of Electrical Computer and Telecommunications Engineering Faculty of Informatics University of Wollongong Wollongong NSW 2522 Australia Signal Processing Group Department of Physics University of Oldenburg 26111 Oldenburg Germany School of Information Technology and Computer Science Faculty of Informatics University of Wollongong Wollongong NSW 2522 Australia

Although generation of correlated Rayleigh fading envelopes has been intensively considered in the literature, all conventional methods have their own shortcomings, which seriously impede their applicability. A very general, straightforward algorithm for the generation of an arbitrary number of Rayleigh envelopes with any desired, equal or unequal power, in wireless channels either with or without Doppler frequency shifts, is proposed. The proposed algorithm can be applied to the case of spatial correlation, such as with multiple antennas in multiple-input multiple-output (MIMO) systems, or spectral correlation between the random processes like in orthogonal frequency-division multiplexing (OFDM) systems. It can also be used for generating correlated Rayleigh fading envelopes in either discrete-time instants or a real-time scenario. Besides being more generalized, our proposed algorithm is more precise, while overcoming all shortcomings of the conventional methods.

关键词： Rayleigh fading

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A computational model of the speech reception threshold for laterally separated speech and noise

A computational model of the speech reception threshold for ...

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9th European Conference on Speech Communication and technology

作者： Brown, Guy J. Palomäki, Kalle J. Department of Computer Science University of Sheffield United Kingdom Lab. of Acoustics and Audio Signal Processing Helsinki Univ. of Technology Finland Dept. of Psychology University of Helsinki Finland

Recent psychophysical studies suggest that human listeners do not segregate concurrent sounds by grouping frequency regions that have a common interaural time difference (ITD). However, such an approach is adopted by most computational auditory scene analysis (CASA) systems that use binaural cues. Here, we propose a CASA system that separates a target speech signal from a noise interferer, but does not require the ITD of the two sources to be consistent across frequency. We compare the CASA system with human performance on the same task, in which the speech reception threshold (SRT) is measured for speech and noise stimuli which have consistent or inconsistent ITDs in different frequency bands. The CASA system is shown to be in qualitative agreement with human performance.

关键词： Speech processing

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DSA image registration based on multiscale Gabor filters and mutual information

DSA image registration based on multiscale Gabor filters and...

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ICIA 2005: 2005 International Conference on Information Acquisition

作者： Cao, Zhiguo Liu, Xiaoxiao Peng, Bo Moon, Yiu-Sang Key Laboratory Huazhong University of Science and Technology Ministry of Education for Image Processing and Intelligent Control Wuhan 430074 China Department of Computer Science and Engineering Chinese University of Hong Kong Shatin N.T. Hong Kong

ISBN: (纸本)0780393031

In clinical practice, digital subtraction angiography (DSA) is a powerful technique for the visualization of blood vessels in X-ray image sequences. Different with traditional DSA image registration processes, in our proposed image registration method, the control points are selected from the vessel centerlines using multiscale Gabor filters, and mutual information (MI) is then taken as the similarity criterion to find the correspondences. Experimental results demonstrate our algorithm efficiently yields satisfying registration result for DSA images. © 2005 IEEE.

关键词： Medical imaging

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