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Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC)

作者： K.A. Banitsas P. Georgiadis S. Tachakra D. Cavouras Department of Electrical and Computer Engineering Brunei University West London UK Medical Image and Signal Processing Laboratory Technological Educational Institute of Athens Athens Greece A&E Department North West London Hospitals NHS Trust Central Middlesex Hospital Central Middlesex Hospital London UK London UK

Recent advances in the hardware of handheld devices, opened up the way for newer applications in the healthcare sector, and more specifically, in the teleconsultation field. Out of these devices, this paper focuses on the services that personal digital assistants and smartphones can provide to improve the speed, quality and ease of delivering a medical opinion from a distance and laying the ground for an all-wireless hospital. In that manner, PDAs were used to wirelessly support the viewing of digital imaging and communication in medicine (DICOM) images and to allow for mobile videoconferencing while within the hospital. Smartphones were also used to carry still images, multiframes and live video outside the hospital. Both of these applications aimed at increasing the mobility of the consultant while improving the healthcare service.

关键词： Handheld computers Hospitals Personal digital assistants Medical services Wireless LAN Biomedical imaging Personnel Mobile handsets Smart phones Application software

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A 3-D modeling scheme for cerebral vasculature from MRA datasets

A 3-D modeling scheme for cerebral vasculature from MRA data...

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Sixteenth IEEE Symposium on computer Based Medical Systems

作者： Qin, Zhongyuan Mou, Xuanqin Zhang, Ruofei Institute of Image Processing Xi'an Jiaotong University Xi'an Shaanxi 710049 China Department of Computer Science Stt. Univ. of New York at Binghamton Binghamton NY 13902 United States

ISBN: (纸本)0769519016

This paper proposes an integrative approach that facilitates physicians to semi automatically obtain a 3-D symbolic representation of cerebral vasculature from 3-D magnetic resonance angiography (MRA) datasets. In this approach, firstly vessels are segmented by morphology method followed by 3-D parallel thinning to obtain the one voxel wide skeleton. Then a novel method employing general tree and its combinations is introduced to depict the 3-D geometrical structure of the vasculature. With the generated tree, post processing, such as traversal and visualization, is implemented. The method has been tested on both synthetic images and real images;the results are promising. A system based on this approach provides a useful visualization tool of the intracerebral vasculature for clinic applications.

关键词： Magnetic resonance imaging

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Solving traveling salesman problems by genetic algorithms

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自然科学进展（英文版） 2003年第2期13卷 135-141页

作者： LIANG Yanchun GE Hongwei Zhou Chunguang LEE Heow Pueh LIN Wuzhong LIM Siak Piang LEE Kwok Hong College of Computer Science and Technology Jilin University Changchun 130012 China Key Laboratory of Intelligent Information Processing Institute of Computing Technology Chinese Academy of Sciences Beijing 100080 China Institute of High Performance Computing Singapore 117528 Singapore College of Mathematics Science Jilin University Changchun 130012 China College of Computer Science and Technology Jilin University Changchun 130012 China Institute of High Performance Computing Singapore 117528 Singapore Department of Mechanical Engineering National University of Singapore Singapore 119260 Singapore

The gene section ordering on solving traveling salesman problems is analyzed by numerical experiments. Some improved crossover operations are presented. Several combinations of genetic operations are examined and the functions of these operations are analyzed. The essentiality of the ordering of the gene section and the significance of the evolutionary inversion operation are discussed. Some results and conclusions are obtained and given, which provide useful information for the implementation of the genetic operations for solving the traveling salesman problem.

关键词： genetic algorithms traveling salesman problem gene section evolutionary inversion genetic operations

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A 3-D modeling scheme for cerebral vasculature from MRA datasets

A 3-D modeling scheme for cerebral vasculature from MRA data...

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Annual IEEE Symposium on computer-Based Medical Systems

作者： Zhongyuan Qin Xuanqin Mou Ruofei Zhang Institute of Image Processing Xi'an Jiaotong Processing Xi'an Shaanxi China Department of Computer Science State University of New york Binghamton Binghamton NY USA

ISBN: (纸本)0769519016

This paper proposes an integrative approach that facilitates physicians to semi automatically obtain a 3-D symbolic representation of cerebral vasculature from 3-D magnetic resonance angiography (MRA) datasets. In this approach, firstly vessels are segmented by morphology method followed by 3-D parallel thinning to obtain the one voxel wide skeleton. Then a novel method employing general tree and its combinations is introduced to depict the 3-D geometrical structure of the vasculature. With the generated tree, post processing, such as traversal and visualization, is implemented. The method has been tested on both synthetic images and real images; the results are promising. A system based on this approach provides a useful visualization tool of the intracerebral vasculature for clinic applications.

关键词： Three dimensional displays

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Real-time joint-transform correlation using optical heterodyning

Real-time joint-transform correlation using optical heterody...

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Pacific Rim Conference on Lasers and Electro-Optics (CLEO/Pacific Rim)

作者： T.-C. Poon Optical Image Processing Laboratory Bradley Department of Electrical and Computer Engineering Virginia Polytechnic Institute and State University Blacksburg VA USA

Driven by potential applications in military, biology, robot navigation and other areas, various methods for optical pattern recognition have been proposed and studied over the past decades. The key feature in current real-time optical pattern recognition systems among these methods is the use of a spatial light modulator (SLM) at the Fourier transform plane in the so-called joint-Fourier transform correlation (JTC) system [C.S Weaver et al. (1966)]. We propose a novel hybrid (optical/electronic) processing technique to achieve real-time joint-transform correlation. The technique employs acousto-optic heterodyne scanning [T.-C. Poon et al., 1979] and it does not require a SLM at the Fourier plane as in other conventional real-time JTC systems. This departure from the conventional scheme is extremely important, as it does not depend on SLM design considerations and issues such as phase uniformity and contrast ratio. The effectiveness of the novel proposed system will be demonstrated with some experimental results. Future work will be focused on exploring scale-invariant, rotation-invariant and multiobject joint-transform correlation with this hybrid optical pattern recognition method.

关键词： Optical mixing Biomedical optical imaging Optical modulation Pattern recognition Real time systems Fourier transforms image processing Application software Military computing Biology

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An overview of self-calibration in sensor array processing

An overview of self-calibration in sensor array processing

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International Symposium on Antennas, Propagation and EM Theory (ISAPE)

作者： Li Qiong Gan Long Ye Zhongfu Image Information Processing Laboratory Department of Computer and Information Hefei University of Technology Hefei China Institute of Statistical Signal Processing Department of Electronic Engineering and Information Science University of Science and Technology Hefei China

The performance of high-resolution DOA estimation methods seriously degenerates when there are model errors in array manifold. According to various prior knowledge of array manifold, this paper classifies series of array self-calibration methods based on second order statistics, then discusses them and concludes their advantages and disadvantages, finally gives some prospect for research on self-calibration.

关键词： Sensor arrays Array signal processing Calibration Parameter estimation Statistics Covariance matrix Direction of arrival estimation Mutual coupling Random processes Signal processing

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A joint source coding-power control approach combined with adaptive channel coding for video transmission over CDMA cellular networks

A joint source coding-power control approach combined with a...

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IEEE Conference on Vehicular Technology (VTC)

作者： Yee Sin Chan J.W. Modestino Center for Image Processing Research & ECSE Department Rensselaer Polytechnic Institute Troy NY USA Department of Electrical and Computer Engineering University of Miami Coral Gables FL USA

We consider a cross-layer design approach for CDMA mobile wireless networks supporting heterogeneous compressed video. By considering the resource requirements as the aggregate of the products of source coding rates and the energy per information bit to noise ratio, we propose a cross-layer optimization approach for video delivery over CDMA cellular networks. In particular, we describe a joint source coding-power control (JSCPC) strategy used in conjunction with joint source-channel coding (JSCC) and employing the class of rate-compatible punctured convolutional (RCPC) codes to provide forward error correction (FEC) coding. We show that this cross-layer approach can simultaneously maximize the quality of the delivered video while minimizing the total resource consumption, thereby providing higher spectral efficiency and improved network utilization. We demonstrate the efficacy of this approach using the ITU-T H.263+ video coder.

关键词： Programmable control Adaptive control Channel coding Multiaccess communication Land mobile radio cellular systems Video compression Forward error correction Cross layer design Wireless networks Aggregates

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Adaptive velocity estimation for disk drive head positioning

Adaptive velocity estimation for disk drive head positioning

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IEEE/ASME (AIM) International Conference on Advanced Intelligent Mechatronics

作者： A. Shademan F. Janabi-Sharifi Signal and Image Processing Group School of Intelligent Systems Institute of Studies in Theoretical Physics and Mathematics Tehran Iran Robotics and Manufacturing Automation Laboratory Department of Mechanical Aerospace and Industrial Engineering Ryerson University Toronto ONT Canada

With the rapid increase of data areal density in disk drives, the need for more accurate position sensing and velocity estimation techniques for the disk drive head actuator emerges. This paper studies the application of velocity estimation methods for disk drive head positioning servo-mechanism with a focus on adaptive windowing velocity estimation. The adaptive windowing technique requires no prior knowledge of measurement noise and shows a better performance compared to conventional finite difference method and Kalman filtering technique. We have compared the performance of adaptive velocity estimation methods under study over a noisy position trajectory in terms of measures for error statistics and undesired shifting. The undesired shifting measure has been developed to reflect the estimation delay and outliers. The simulation results show the superiority of adaptive windowing velocity estimation to conventional methods.

关键词： Disk drives Delay estimation Actuators Noise measurement Finite difference methods Kalman filters Adaptive filters Filtering Position measurement Velocity measurement

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Fast and efficient multi-layer CNN-UM emulator using FPGA

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Periodica Polytechnica Electrical Engineering 2003年第1-2期47卷 57-70页

作者： Nagy, Zoltán Szolgay, Péter Department of Image Processing University of Veszprém Egyetem u. 10 H-8200 Veszprém Hungary Analogic/Neural Computing Laboratory Computer and Automation Institute HAS Kende u. 13-17 H-1111 Budapest Hungary

A new emulated digital multi-layer CNN-UM chip architecture called Falcon has been developed. Simulation running time can be hundred times shorter using the Falcon processor array compared to the software simulation. This huge computing power makes real time image processing possible. In this paper the main steps of the FPGA implementation and optimization are introduced. The Distributed Arithmetic technique is used to optimize the architecture on FPGAs. Using this technique, smaller and faster arithmetic units can be designed than using conventional approach where multiplier cores and adder trees are used to compute the state equation of the CNN array.

关键词： Program processors

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Automatic face region tracking for highly accurate face recognition in unconstrained environments

Automatic face region tracking for highly accurate face reco...

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IEEE Conference on Advanced Video and Signal Based Surveillance (AVSS)

作者： Y.-O. Kim J. Paik Jingu Heo A. Koschan B. Abidi M. Abidi Korea Electronics and Technology Institute Puchon Gyeonggi South Korea Image Processing Laboratory Department of Image Engineering Graduate School of Advanced Imaging Science Multimedia and Film Chung-Ang University Seoul South Korea Imaging Robotics and Intelligent Systems Laboratory Department of Electrical and Computer Engineering University of Tennessee Knoxville USA

We present a combined real-time face region tracking and highly accurate face recognition technique for an intelligent surveillance system. High-resolution face images are very important to achieving accurate identification of a human face. Conventional surveillance or security systems, however, usually provide poor image quality because they use only fixed cameras to record scenes passively. We have implemented a real-time surveillance system that tracks a moving face using four pan-tilt-zoom (PTZ) cameras. While tracking, the region-of-interest (ROI) can be obtained by using a low-pass filter and background subtraction with the PTZ. Color information in the ROI is updated to extract features for optimal tracking and zooming. FaceIt/sup /spl reg//, which is one of the most popular face recognition software packages, is evaluated and then used to recognize the faces from the video signal. Experimentation with real human faces showed highly acceptable results in the sense of both accuracy and computational efficiency.

关键词： Face recognition Surveillance Real time systems Humans Cameras Intelligent systems Security image quality Layout Low pass filters

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