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Proceedings of the 2004 IEEE computer Society Conference on computer Vision and Pattern Recognition, CVPR 2004

作者： Schechner, Yoav Y. Nayar, Shree K. Dept. Electrical Engineering Technion - Israel Inst. Technology Haifa 32000 Israel Dept. Computer Science Columbia University New York NY 10027

To obtain high dynamic range or hyperspectral images, multiple frames of the same field of view are acquired while the imaging settings are modulated;images are taken at different exposures or through different wavelength bands. A major problem associated with such modulations has been the need for perfect synchronization between image acquisition and modulation control. In the past, this problem has been addressed by using sophisticated servo-control mechanisms. In this work, we show that the process of modulation imaging can be made much simpler by using vision algorithms to automatically relate each acquired frame to its corresponding modulation level. This correspondence is determined solely from the acquired image sequence and does not require measurement or control of the modulation. The image acquisition and the modulation work continuously, in parallel, and independently. We refer to this approach as computational synchronization. It makes the imaging process simple and easy to implement. We have developed a prototype modulation imaging system that uses computational synchronization and used it to acquire high dynamic range and multispectral images.

关键词： Imaging techniques

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The correlation between NDVI value and surface temperature measured by aster 20

The correlation between NDVI value and surface temperature m...

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20th ISPRS Congress on Technical Commission VII

作者： Takemata, K. Kawata, Y. Naoe, N. Div. of Practical Engineering Education Kanazawa Institute of Technology Nonoichi Ishikawa921-8501 Japan Dept. of Media Informatics Kanazawa Institute of Technology Nonoichi Ishikawa921-8501 Japan Dept. of Electrical and Computer Engineering Kanazawa Technical College Kanazawa Ishikawa921-8601 Japan

The thermal environment in urban areas is characterized by the heat island phenomenon. To estimate the thermal conditions of land surfaces by satellite, it is necessary to find the relationship between the surface temperature and land cover type. The most widely used vegetation index for ecological application is the Normalized Difference Vegetation Index (NDVI). We studied the correlation between NDVI values and the surface temperature in our study area. NDVI uses radiance values or apparent reflectance values of the red and the near-infrared spectral bands. These reflectance values are influenced by the atmospheric aerosols. In order to calculate accurate NDVI values (aerosol-free NDVI), we first estimated the surface reflectance at visible bands by using our atmosphere-ground surface system based on the aerosol observation data. At the test site, we measured the aerosol optical thickness of visible bands using a sky radiometer, and we measured the air temperature and humidity by using a thermometer-hygrometer with a data logger. In this paper, we show the variations of aerosol optical thickness in the spring and summer and demonstrate the correlation between the surface temperatures of ASTER level 2B products and our observed screen temperatures.

关键词： Surface temperature

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Real-time estimation of strong motion seismic waves

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Acta Geodaetica et Geophysica Hungarica 2004年第2-3 SPEC. ISS.期39卷 297-308页

作者： Radeva, S. Scherer, R.J. Radev, D. Yakov, V. Dept. of Computer Aided Engineering Faculty of Civil Engineering Univ. of Arch. Civil Eng./Geodesy Sofia 1612 Bulgaria Inst. Appl. Informatics Civ. Eng. Department of Civil Engineering Dresden University of Technology Nuernberger Str. 31 A Dresden D-01187 Germany Department of Commun. Tech./Technol. University of Rousse 8 Studentska Str. Rousse 7017 Bulgaria

An approach for real-time analyses, estimation and prognoses of strong motion seismic waves with stochastic modeling and neural network is presented. As input information are given the parameters of recorded part of accelerogram, principle axis transform and spectral characteristics of the wave. With the help of stochastic long range dependence time series analyses is determined the beginning of destructive phase of strong motion acceleration. The suggested approach gives possibility to classify seismic waves from recorded part of the wave to certain class, according to developed seismic waves classification. For different kind of classified waves are suggested different kind prognoses models. The prognoses is realized with the help of neural network, build on the principle of vector quantization. For prognoses of destructive phase of strong motion waves is suggested scene-oriented model. The determined statistical function of density distribution of recorded data from accelerogram are generating in real time. The received destructive phase prognoses of strong motion waves can be used in devices for structural control. Examples of received prognoses are compared with real data of strong motion waves. Simulation and numerical results are shown.

关键词： Seismology

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Shape recognition of the embryo cell using deformable template for micromanipulation

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17th International Conference on Industrial and engineering Applications of Artificial Intelligence and Expert Systems, IEA/AIE 2004

作者： Jang, Min-Soo Lee, Seok-Joo Lee, Ho-Dong Kim, Yong-Guk Kim, Byungkyu Park, Gwi-Tae Dept. of Electrical Engineering Korea University Seoul Korea Republic of School of Computer Engineering Sejong University Seoul Korea Republic of Korea Inst. of Sci. and Technology Seoul Korea Republic of

ISBN: (纸本)3540220070

In biology, manipulating a micro-scale object such as chromosome, nucleus or embryo has been an important issue. For instance, skillful manipulation of the embryo cell in the biological experiment requires many years experience with a complex setup. Moreover, such process is usually very slow and requires many hours of intense operations such as trying to find the position of the cell within a petri dish and injecting a pipette to the cell from the best orientation. We have designed a new vision system, by which it finds the region of the mouse embryo cell, and then tracks the nucleus and the polar body within the cell, respectively, using the deformable template algorithm. Performance of the system is compared to the manual case.

关键词： DNA

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Power aware virtual node routing scheme in ad hoc networks

Power aware virtual node routing scheme in ad hoc networks

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Proceedings of the Fourth IASTED International Multi-Conference on Wireless and Optical Communications

作者： Pandey, A. Gupta, P. Kush, A.K. Hwang, C.J. Dept. of Comp. Sci. and Engineering Indian Inst. of Technology Kanpur Kanpur - 208016 India Department of Computer Science University College Kurukshetra University Kurukshetra India Department of Computer Science Texas State University San Marcos TX United States

ISBN: (纸本)088986411X

A recent trend in ad hoc network routing is the reactive on-demand philosophy where routes are established only when required. Most of the protocols in this category, however, use single route and do not utilize multiple alternate paths. This paper proposes a scheme to improve existing on-demand routing protocols by introducing the power aware virtual node scheme in whole scenario. The scheme establishes the multi paths without transmitting any extra control message. It offers quick adaptation to distributed processing, dynamic linking, low processing and memory overhead and loop freedom at all times. It also uses the concept of Power awareness among route selection nodes and concept of Virtual Nodes which insures fast selection of routes with minimal efforts and faster recovery. The scheme is applied to the Ad-hoc On-Demand Distance Vector (AODV) protocol and the performance has been studied through simulation.

关键词： Mobile computing

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Optimal puncturing for multiple parallel concatenated codes

Optimal puncturing for multiple parallel concatenated codes

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Proceedings - 2004 IEEE International Symposium on Information Theory

作者： Brännström, Fredrik Rasmussen, Lars K. Grant, Alex Dept. of Computer Engineering Chalmers University of Technology SE-412 96 Göteborg Sweden Inst. for Telecom. Research University of South Australia Mawson Lakes SA 5095 Australia

Optimal puncturing ratios for parallel concatenated codes with two or more constituent codes are found using extrinsic information transfer functions. These ratios minimise the signal-to-noise ratio convergence threshold and provide additional degrees of freedom for constructing codes with low thresholds over a wide range of code rates.

关键词： Codes (symbols)

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Modeling of power distribution networks with retardation using the transmission matrix method

Modeling of power distribution networks with retardation usi...

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IEEE Topical Meeting on Electrical Performance of Electronic Packaging (EPEPS)

作者： T. Watanabe K. Srinivasan H. Asai M. Swaminathan School of Administration and Informatics University of Shizuoka Shizuoka Japan School of Electrical and Computer Engineering Georgia Institute of Technology Atlanta GA USA Dept. of Systems Engineering Shizuoka University Hamamatsu Japan

This work describes the analysis of multilayered power distribution networks that include signal lines and vias. The signal lines are modeled as transmission lines, and vias are represented as not only self and mutual inductances but also include retardation currents. The structures have been analyzed using the transmission matrix method (TMM) in the frequency domain. Analysis using the TMM provides considerable savings in memory compared to SPICE.

关键词： Power systems Power transmission lines Transmission line matrix methods Admittance Voltage Inductance Capacitors Paramagnetic resonance Packaging Power system modeling

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Acousto-optic modulation in an optical fiber sensor and it's electric model

Acousto-optic modulation in an optical fiber sensor and it's...

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WCICA 2004 - Fifth World Congress on Intelligent Control and Automation, Conference Proceedings

作者： Zhou, Li Zhuang, Nina Gu, Ping Dept. of Electronic Engineering Nanchang Inst. of Aero. Technology Nanchang 330034 Dept. of Computer Sicence Nanchang Inst. of Aero. Technology Nanchang 330034

This paper introduces the model theory and acousto-optic effect in the optical fiber sensor. Firstly, the general theories have been discussed for understanding the mechanism of interaction between acoustic and optical waves. Secondly, the electric equivalence model of the optical fiber sensor is introduced. Finally, the computer simulation of the model has been made.

关键词： Fiber optic sensors

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A GA-based multi-purpose optimization algorithm for QoS routing

A GA-based multi-purpose optimization algorithm for QoS rout...

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Proceedings - 18th International Conference on Advanced Information Networking and Applications, AINA 2004

作者： Koyama, Akio Barolli, Leonard Matsumoto, Kazunori Apduhan, Bernady O. Department of Informatics Yamagata University 4-3-16 Jonan Yonezawa Yamagata 992-8510 Japan Dept. of Information Engineering Fukuoka Institute of Technology 3-30-1 Wajiro-Higashi Higashi-ku Fukuoka 811-0295 Japan Department of Computer Software University of Aizu Tsuruga Ikki-machi Aizu-Wakamatsu 965-8580 Fukushima Japan Dept. of Intelligent Informatics Kyushu Sangyo University 2-3-1 Matsukadai Higashi-ku Fukuoka 813-8503 Japan

ISBN: (纸本)0769520510

The routing algorithms for multimedia communication should use for routing more than one QoS parameter. This is because new services such as video on demand and remote meeting systems require better QoS. However, the problem of QoS routing is difficult and to find a feasible route with two independent path constraints is NP-complete. Also, QoS routing algorithms for broadband networks must be adaptive, flexible, and intelligent for efficient network management. In this paper, we propose a multipurpose optimization method for QoS routing based on Genetic Algorithm (GA). The simulation results show that proposed method has a good performance and is a promising method for QoS routing.

关键词： Routers

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An alternative representation of speech using the modified group delay feature

An alternative representation of speech using the modified g...

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International Conference on Signal Processing and Communications, SPCOM

作者： R.M. Hedge H.A. Murthy Dept. of Comput. Sci. & Eng. Indian Inst. of Technol. Madras India Department of Computer Science and Engineering Indian Institute of Technology Madras Chennai India Department of Computer Science and Engineering Indian Institute of Technology Madras Chennai

Representation of speech is complete when both the Fourier transform magnitude and phase spectra are used to extract features. But speech is conventionally represented by features derived from the Fourier transform magnitude spectra. In this paper, we propose an alternative representation of speech which uses the modified group delay function derived from the Fourier transform phase spectra. Cepstral features are derived from the modified group delay function. These features are called the modified group delay feature (MODGDF). Robustness of the MODGDF to convolutional and additive noise are then analyzed mathematically. Class separability and task independence of the MODGDF is then illustrated via the sequential forward search feature selection method. The results of performance evaluation of the MODGDF for four speech processing tasks phoneme recognition, syllable recognition, speaker identification, and language identification are presented. Motivated by the results of feature evaluation and performance evaluation, the MODGDF is proposed as an alternative representation of speech.

关键词： Delay Fourier transforms Cepstral analysis Speech recognition Feature extraction Automatic speech recognition Noise robustness Additive noise Speech processing Natural languages

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