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Neural network based skin color model for face detection 32

Neural network based skin color model for face detection

引用

32nd Applied Imagery Pattern Recognition Workshop, AIPR 2003

作者： Seow, Ming-Jung Valaparla, D. Asari, V.K. VLSI Systems Laboratory Department of Electrical and Computer Engineering Old Dominion University NorfolkVA23529 United States

ISBN: (纸本)0769520294

This paper presents a novel neural network based technique for face detection that eliminates limitations pertaining to the skin color variations among people. We propose to model the skin color in the three dimensional RGB space which is a color cube consisting of all the possible color combinations. Skin samples in images with varying lighting conditions, from the Old Dominion University skin database, are used for obtaining a skin color distribution. The primary color components of each plane of the color cube are fed to a three-layered network, trained using the backpropagation algorithm with the skin samples, to extract the skin regions from the planes and interpolate them so as to provide an optimum decision boundary and hence the positive skin samples for the skin classifier. The use of the color cube eliminates the difficulties of finding the non-skin part of training samples since the interpolated data is consider skin and rest of the color cube is consider non-skin. Subsequent face detection is aided by the color, geometry and motion information analyses of each frame in a video sequence. The performance of the new face detection technique has been tested with real-time data of size 320x240 frames from video sequences captured by a surveillance camera. It is observed that the network can differentiate skin and non-skin effectively while minimizing false detections to a large extent when compared with the existing techniques. In addition, it is seen that the network is capable of performing face detection in complex lighting and background environments. © 2004 IEEE.

关键词： Color

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Fusion of visual and thermal signatures with eyeglass removal for robust face recognition

Fusion of visual and thermal signatures with eyeglass remova...

引用

2004 IEEE computer Society Conference on computer Vision and Pattern Recognition Workshops, CVPRW 2004

作者： Heo, Jingu Kong, Seong G. Abidi, Besma R. Abidi, Mongi A. Imaging Robotics and Intelligent Systems Laboratory Department of Electrical and Computer Engineering University of Tennessee KnoxvilleTN37996-2100 United States

This paper describes a fusion of visual and thermal infrared (IR) images for robust face recognition. Two types of fusion methods are discussed: data fusion and decision fusion. Data fusion produces an illumination-invariant face image by adaptively integrating registered visual and thermal face images. Decision fusion combines matching scores of individual face recognition modules. In the data fusion process, eyeglasses, which block thermal energy, are detected from thermal images and replaced with an eye template. Three fusion-based face recognition techniques are implemented and tested: Data fusion of visual and thermal images (Df), Decision fusion with highest matching score (Fh), and Decision fusion with average matching score (Fa). A commercial face recognition software FaceIt® is used as an individual recognition module. Comparison results show that fusion-based face recognition techniques outperformed individual visual and thermal face recognizers under illumination variations and facial expressions. © 2004 IEEE.

关键词： Face recognition

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ATEMU: A fine-grained sensor network simulator

ATEMU: A fine-grained sensor network simulator

引用

2004 First Annual IEEE Communications Society Conference on Sensor and Ad Hoc Communications and Networks, IEEE SECON 2004

作者： Polley, Jonathan Blazakis, Dionysys McGee, Jonathan Rusk, Dan Baras, John S. Karir, Manish Department of Electrical and Computer Engineering Institute for Systems Engineering University of Maryland College Park MD 20742 United States Networking Research and Development Merit Network Inc. Ann Arbor MI 48105

ISBN: (纸本)0780387961

In this paper we describe the design and implementation of ATEMU, a fine grained sensor network simulator. ATEMU is intended to bridge the gap between actual sensor network deployments and sensor network simulations. We adopt a hybrid strategy, where the operation of individual sensor nodes is emulated in an instruction by instruction manner, and their interactions with each other via wireless transmissions are simulated in a realistic manner. A unique feature of ATEMU is its ability to simulate a heterogeneous sensor network. Using ATEMU it is possible to not only accurately simulate the operation of different application on the MICA2 platform but also a complete sensor network where the sensor nodes themselves maybe based on different hardware platforms. In addition we also describe our implementation of XATDB, our front-end debugger/GUI for ATEMU. XATDB provides an excellent educational tool for people to start learning about the operation of sensor nodes and sensor networks, without requiring the purchase of actual sensor node hardware. The accuracy and emulation capabilities provided by ATEMU ensure that when and if actual hardware is used, the software will already have undergone rigorous testing and debugging on an accurate platform. This would provide the sensor network deployment community with a much more accurate estimate of the performance of various algorithms and protocols in realistic scenarios and platforms. © 2004 IEEE.

关键词： Telecommunication networks

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Understanding the behavior and performance of non-blocking communications in MPI

引用

10th International European Conference on Parallel Processing, Euro-Par 2004

作者： Saif, Taher Parashar, Manish The Applied Software Systems Laboratory Department of Electrical and Computer Engineering Rutgers University PiscatawayNJ08854 United States

ISBN: (纸本)3540229248

The behavior and performance of MPI non-blocking message passing operations are sensitive to implementation specifics as they are heavily dependant on available system level buffers. In this paper we investigate the behavior of non-blocking communication primitives provided by popular MPI implementations and propose strategies for these primitives than can reduce processor synchronization overheads. We also demonstrate the improvements in the performance of a parallel Structured Adaptive Mesh Refinement (SAMR) application using these strategies. © Springer-Verlag Berlin Heidelberg 2004.

关键词： Message passing

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Web search steganalysis: some challenges and approaches

Web search steganalysis: some challenges and approaches

引用

IEEE International Symposium on Circuits and systems (ISCAS)

作者： R. Chandramouli Multimedia Systems Networking and Communications (MSyNC) Laboratory Department of Electrical and Computer Engineering Stevens Institute of Technology USA

This work presents some important issues in searching the Internet for covert messages. Several related theoretical and practical problems are discussed. Web search is formulated as a mathematical optimization problem and solutions are proposed. Two algorithms: coordinated search and random search are discussed within this optimization framework along with their pros and cons.

关键词： Web search TCPIP Internet Digital images Steganography Information security Protocols Network servers Delay Search engines

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Distributed power control of cellular networks in the presence of Rayleigh fading channel

Distributed power control of cellular networks in the presen...

引用

IEEE Annual Joint Conference: INFOCOM, IEEE computer and Communications Societies

作者： S. Jagannathan M. Zawodniok Q. Shang Embedded Systems and Networking Laboratory Department of Electrical and Computer Engineering University of Missouri Rolla Rolla MO USA

A novel distributed power control (DPC) scheme for cellular networks in the presence of radio channel uncertainties such as path loss, shadowing, and Rayleigh fading is presented. Since these uncertainties can attenuate the received signal strength and can cause variations in the received signal-to-interference ratio (SIR), the proposed DPC scheme maintains a target SIR at the receiver provided the uncertainty is slowly varying with time. The DPC estimates the time varying nature of the channel quickly and uses the information to arrive at a suitable transmitter power value. Further, the standard assumption of a constant interference during a link's power update used in other works in the literature is relaxed. A CDMA-based cellular network environment is used to compare the proposed scheme with earlier approaches. The results show that our DPC scheme can converge faster than others by adapting to the channel variations. The proposed DPC scheme can render outage probability of 5 to 30% in the presence of uncertainties compared with other schemes of 50 to 90% while consuming low power per active mobile user. In other words, the proposed DPC scheme allows significant increase in network capacity while consuming low power values even when the channel is uncertain.

关键词： Power control Land mobile radio cellular systems Intelligent networks Fading Receivers Uncertainty Rayleigh channels Radio transmitters Embedded system Shadow mapping

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Fovea based coding for video streaming 1

引用

International Conference on Image Analysis and Recognition, ICIAR 2004

作者： Dikici, Çağatay Bozma, H Isıl Civanlar, Reha Intelligent Systems Laboratory Electrical and Electronics Engineering Department Boğaziç University IstanbulBebek34342 Turkey Computer Engineering Department Koç University Istanbul34450 Turkey

ISBN: (数字)9783540301257

ISBN: (纸本)3540232230

Attentive robots, inspired by human-like vision – are required to have visual systems with fovea-periphery distinction and saccadic motion capability. Thus, each frame in the incoming image sequence has nonuniform sampling and consecutive saccadic images have temporal redundancy. In this paper, we propose a novel video coding and streaming algorithm for low bandwidth networks that exploits these two features simultaneously. Our experimental results reveal improved video streaming in applications like robotic teleoperation. Furthermore, since the algorithm employs the Gaussian-like resolution of human visual system and is extremely simple to integrate with the standard coding schemes, it can also be used in applications such as cellular phones with video. © Springer-Verlag Berlin Heidelberg 2004.

关键词： Video streaming

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A fault-injection attack on Fiat-Shamir cryptosystems

A fault-injection attack on Fiat-Shamir cryptosystems

引用

International Conference on Distributed Computing systems Workshop

作者： A.G. Voyiatzis D.N. Serpanos Computer Systems Laboratory Department of Electrical and Computer Engineering University of Patras Greece

Fault-injection attacks and cryptanalysis is a realistic threat for systems implementing cryptographic algorithms. We revisit the fault-injection attacks on the Fiat-Shamir authentication scheme, a popular authentication scheme for service providers like pay per view television, video distribution and cellular phones. We present a new and effective attack on cryptosystems that implement the Fiat-Shamir identification scheme. The attack is successful against all system configurations in contrast to the original Bellcore attack, which has been proven incomplete (easy to defend against).

关键词： Authentication Public key cryptography Fault diagnosis Public key Laboratories TV Cellular phones Information security Mathematical model Information analysis

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Quality of service for the zone on the internet

引用

International Conference on Information networking, ICOIN 2004

作者： Ahmed, Ashraf Uddin Sakashita, S. Cheng, Z. Saito, S. Computer Communication and Networking Laboratory Fukushima965-8580 Japan Department of Computer Systems Fukushima965-8580 Japan Graduate School of Computer Science and Engineering Fukushima965-8580 Japan The University of Aizu Aizuwakamatsu City Fukushima965-8580 Japan

ISBN: (纸本)3540230343

It is possible to enjoy the quality of service related informations of a single node or a link between two nodes, which is understandable for the technical people only. Yet, there is no zone-based quality of service in the Global Internet which is understandable for both the technical and non-technical people. Zone is used as an autonomous systems (AS) in this document. To fulfill this requirement, this paper approached a new model called Ryuki Model to produce quality of services for the zone on the Internet. © Springer-Verlag Berlin Heidelberg 2004.

关键词： Quality of service

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Subchannel-allocation algorithms and performance analysis for space-time OFDM-CDMA based systems in wireless networks

Subchannel-allocation algorithms and performance analysis fo...

引用

IEEE Conference on Wireless Communications and networking

作者： Jia Tang Xi Zhang Networking and Information Systems Laboratory Department of Electrical Engineering Texas A and M University College Station TX USA

ISBN: (纸本)0780383443

Both space-time (ST) processing and orthogonal frequency division multiplexing (OFDM) are becoming increasingly important techniques used in physical layer to support the quality of service (QoS) for different applications in wireless networks. However, the employment of such techniques affects the scheme designs at higher layers such as channel allocation algorithms at media access control (MAC) layer. Therefore, a crossing-layer development is required. In this paper, we propose the subchannel allocation algorithms based on space-time OFDM-CDMA systems, and develop the throughput-performance analysis frameworks to evaluate the proposed algorithms. Our analyses show that the proposed subchannel allocation scheme can significantly increase the system throughput over wireless networks, while achieving a much lower implementation and computation complexity as compared to the smart-antenna-based systems. Also presented are the simulation results that verify the analytical findings and observations.

关键词： Performance analysis Wireless networks OFDM Quality of service Algorithm design and analysis Physical layer Employment Channel allocation Media Access Protocol Throughput

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