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检索条件"任意字段=Conference on Algorithms, Devices, and Systems for Optical Information Processing"

共 3211 条记录，以下是2881-2890 订阅

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Fundamentals of optical interconnections - a review

Fundamentals of optical interconnections - a review

引用

Proceedings of the 1997 4th International conference on Massively Parallel processing Using optical Interonnections, MPPOI'97

作者： Ozaktas, Haldun M. Bilkent Univ Ankara Turkey

We review some of the relatively fundamental work in the area of optically interconnected digital computing systems. We cover comparisons of optical interconnections with other interconnection media in terms of energy and interconnection density, studies determining the optimal combination of optical and electrical interconnections that should be used, work on free-space optical interconnection architectures, complexity studies, and work on physical and logical system architectures and algorithms. We exclude work on devices, components, materials, and manufacturing.

关键词： optical interconnects

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Computed radiographic image post-processing in picture archiving and communication systems

Computed radiographic image post-processing in picture archi...

引用

conference on PACS Design and Evaluation - Engineering and Clinical Issues, at the Medical Imaging 1997 Meeting

作者： Zhang, JG Andriole, KP Huang, HK Univ. of California/San Francisco (United States)

This paper presents the key post-processing algorithms for CR images used in our second generation PACS and its software implementation based on the algorithm features, fault tolerance and multilevel adaptive control,... 详细信息

ISBN: (纸本)0819424463

关键词： computed radiography PACS post-processing algorithms adaptive process control

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Enterprise imaging and display consistency

Enterprise imaging and display consistency

引用

conference on PACS Design and Evaluation - Engineering and Clinical Issues, at the Medical Imaging 1997 Meeting

作者： Przybylowicz, JE DOME Imaging Systems (United States)

ISBN: (纸本)0819424463

Managed care continues to drive healthcare providers in search of systems that improve productivity and reduce costs. The integration and centralization of information and image management systems are the central design theme of many evolving enterprise solutions. One of the major value drivers of these integrated image and information systems is the time and location independence of the clinical decision. Images and information being presented consistently and independent of the device or workstation is crucial to the enterprise's productivity improvements. This is true for information used for primary clinical decisions as well as for secondary or follow-up treatment.

关键词： information fusion Medical imaging Imaging systems System integration Calibration Digital signal processing Distributed computing Instrument modeling Measurement devices Medicine

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On the Storage Capacity of Electrically Addressable SLMs in Coherent optical information processing systems

On the Storage Capacity of Electrically Addressable SLMs in ...

引用

Spatial Light Modulators, SLM 1997

作者： Teiwes, Stephan Schwarzer, Heiko Aagedal, Harald Berlin Institute of Optics Rudower Chaussee 6 Berlin12484 Germany University of Karlsruhe Department of Informatics Am Fasanengarten 5 Karlsruhe76131 Germany

ISBN: (纸本)9781557528209

The development of electrically addressable spatial light modulators (EASLMs) is leading to the implementation of new opto-electronic information processing devices, where the optical function can be switched. Applications such as optical image processing, free-space communications or holographic pattern generation have been described in literature. The amount of information which can be processed in coherent optical systems depends on the storage properties of modulators. However, only few publications deal with this topic [1,2,3]. In this paper, the storage properties of an EASLM in a coherent optical system and the transmission of information in this system are expressed in terms of information theory. It is demonstrated that the restriction of an EASLM to fixed modulation schemes may seriously disable an error-free processing of information due to strong noise effects. These noise effects are described by measures of information theory. We focus on coding methods of diffractive optics to reduce the noise energy in optical signal waves which carry information. The correspondence of these methods to channel coding methods known from communication theory is stressed. Finally, the storage capacity of an EASLM is analysed in a numerical simulation experiment. © 1997 optical Society of America.

关键词： optical data processing

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Proceedings of the 1997 1st International conference on information, Communications and Signal processing, ICICS. Part 2 (of 3)

Proceedings of the 1997 1st International Conference on Info...

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Proceedings of the 1997 1st International conference on information, Communications and Signal processing, ICICS. Part 3 (of 3)

The proceedings contains 140 papers from the 1997 International conference on information, Communications and Signal processing. Topics discussed include: routing algorithms in ATM networks;traffic control in ATM networks;neural networks;image processing;audio and acoustic signal processing;telecommunication network design;database and distributed systems;code division multiple access (CDMA);switching in ATM networks;speech processing;data communication networks;multimedia information retrieval;satellite communications;signal encoding;optical fiber communication;adaptive signal processing;and telecommunication network management.

关键词： Telecommunication

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Performance analysis of an asynchronous track fusion and architecture

Performance analysis of an asynchronous track fusion and arc...

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conference on Signal processing, Sensor Fusion, and Target Recognition VI

作者： Alouani, AT Rice, TR Tennessee Technological Univ. (United States) Naval Surface Warfare Ctr. (United States)

ISBN: (纸本)0819424838

In practice, Multisensor systems use dissimilar sensors having different data rates. Such sensors may also have inherent delays as well as communication delays. Recently the authors developed a track fusion algorithm that attempted to account for realistic constraints of sensor fusion. The objective of this paper are two folds. First, it shows that the synchronous track fusion problem can be derived as a special case of the developed track fusion algorithm. Second, using simulated target tracks, the performance of the asynchronous track fusion (ASTF) algorithm is analyzed and compared to an existing fusion algorithm. Different sensor data rates and communication delays are used in the simulations.

关键词： Sensors Algorithm development Detection and tracking algorithms Data communications Monte Carlo methods Computer simulations Data processing information technology Lithium Sensor fusion

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High information content projection displays

High information content projection displays

引用

Proceedings of the 1997 conference on Lasers and Electro-Optics, CLEO

作者： Melcher, R.L. IBM Watson Research Cent Yorktown Heights United States

Microdisplay technologies and the optical systems which provide projection displays are evaluated. Reflective microdisplay technology provides advantages over the more conventional transmissive and emissive technologies. These microdisplays are typically fabricated with the use of modifications of conventional silicon semiconductor processing and are capable of achieving high resolution and high optical efficiency. Among the microdisplays that were evaluated include large arrays of micromechanical diffractive elements, and liquid crystal electro-optic cells based on nematic, ferroelectric, or polymer dispersed liquid crystal materials.

关键词： Display devices

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Real-time license plate reading for origin/destination studies

Real-time license plate reading for origin/destination studi...

引用

conference on Transportation Sensors and Controls - Collision Avoidance, Traffic Management and ITS

作者： DAgostino, SA Shuldiner, PW Merrick, M Woodson, J Computer Recognition Systems (United States) Transfomation System Inc. (United States)

ISBN: (纸本)0819423041

Determination of vehicle origins and destinations have long been a goal and a tool for traffic planners. Recently there has been an increase in the use of machine vision systems (automatic license plate readers) for determining origins and destinations. The original work in this area involved recording traffic on s-video compatible tape formats (e.g. s-VHS and Hi-8mm). Recently the use of real time analysis of traffic flows has been implemented. This paper describes the implementation of a system to acquire license plate information on the Tacoma Narrows Bridge, in Washington state. The paper describes the system installation, the system architecture, the data handling and mail outs and some preliminary results.

关键词： Computing systems Machine vision Bridges Video Cameras Data acquisition Detection and tracking algorithms Image processing Imaging systems Software

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Concealed weapon detection: An image fusion approach

Concealed weapon detection: An image fusion approach

引用

conference on Investigative Image processing

作者： Uner, MK Ramac, LC Varshney, PK Alford, M Syracuse Univ. (United States) Rome Lab. (United States)

ISBN: (纸本)0819423440

This paper presents an approach to image fusion for concealed weapon detection (CWD) applications. In this work, we use image fusion to combine complementary image information from different sensors to obtain a single composite image with more detailed and complete information content. As a result of this processing, the new images are more useful for human perception and automatic computer analysis, tasks such as feature extraction and object recognition. In the fusion process, the images are first decomposed based on wavelet transform. Then at each lower resolution the images are fused by using several feature selection algorithms. The final composite image is obtained by taking the inverse wavelet transform of the fused wavelet coefficients. This technique has been applied to real data obtained from IR sensors. Special emphasis is placed on situations when weapons may not be completely visible from the sensors. Fusion results thadt demonstrate the utility of our approach are presented.

关键词： image fusion wavelets multiresolution analysis image decomposition concealed weapon detection multisensor systems multiscale image processing sensor fusion

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Particle imaging technique for size, velocity and concentration measurements in particle laden flows

Particle imaging technique for size, velocity and concentrat...

引用

conference on optical Technology in Fluid, Thermal, and Combustion Flow III

作者： Martin, WT Kadambi, JR Wernet, MP Case Western Reserve Univ Dept Mech & Aerosp Engn Cleveland OH 44106 USA

ISBN: (纸本)081942594X

Particle laden flows are encountered in many fossil fuel and industrial processes such as the gas-solid flows in power plants, liquid-solid flows in coal and grain transportation and gas-liquid flows in combustors. These flows are not well understood, thus computational fluid dynamic modeling of these systems has been hampered. Fundamental measurements are required to study the motion of the different phases to obtain an understanding of these flows and to develop reliable models. No reliable non-intrusive methods are available to fully characterize two phase flow fields, i.e. obtain particle size, velocity, concentration and concentration gradients at the same time over an extended area of interest. Intrusive sampling methods compromise the two phase flow field making the measurements suspect. Conventional optical methods (Laser Doppler Velocimeters) do not disturb the flow but provide local point wise velocity measurements only. Particle size can be obtained for only spherical particles using the phase Doppler interferometric methods. Particle Imaging Velocimetry (PIV) is a non-intrusive technique for measuring the velocity of particles entrained in a fluid across a planar cross-section of a flow. A light sheet illuminates the particles at several instances in time and the scattered light is recorded on a CCD array image frame. The recorded image frames can be processed via auto or cross-correlation techniques to determine the average velocity over a regular grid of small sub-regions across the image frame. Alternatively, particle tracking techniques can be used to measure the individual particle velocities. In addition to the particle velocity information, the particle size information is contained in the recorded image. Image processing techniques can then be applied to the image frame to determine either the individual (particle tracking case) or average particle size in each subregion previously used to determine the velocities (correlation processing case). T

关键词： Particles Error analysis Image processing Velocity measurements Charge-coupled devices Statistical analysis Signal detection Image analysis Light scattering Spatial resolution

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