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

共 250 条记录，以下是131-140 订阅

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Neural network hardware based on optoelectronic devices and electronic techniques

Neural network hardware based on optoelectronic devices and ...

引用

conference on algorithms and systems for optical information processing VI

作者： Ruiz-Llata, M Lamela, H Warde, C Univ Carlos III Madrid Dept Tecnol Elect Leganes 28911 Madrid Spain

ISBN: (纸本)0819445568

In this paper we present an optoelectronic hardware implementation of a neural network system based on optoelectronic devices and electronic techniques. The system is composed of basic cells with optoelectronic artificial neurons;every basic cells exploits the communication strengths of optics to broadcast the input to all neurons and the computational strengths of electronics to assign the interconnections weights. Description of the architecture of the basic cell, the first implementation of a prototype based on the proposed system and examples of configuration of the neural system are described.

关键词： neuroprocessor optoelectronic neural network optical interconnections electronic processing

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All optical logic gates using semiconductor optical amplifiers

All optical logic gates using semiconductor optical amplifie...

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conference on Photonic devices and algorithms for Computing IV

作者： McAulay, AD All Opt Networks Inc San Diego CA USA

ISBN: (纸本)081944555X

All-optical logic can avoid expensive demultiplexing back to electronics in telecommunications. The term all-optical is used to described processing in which all signal paths are optical whether used for control or information. Semiconductor optical amplifiers (SOAs) can perform all optical logic because they have nonlinearity, low latency, and require low power. We use highly accurate computer models to simulate and evaluate NOR and NXOR logic gates using SOAs. These elements can act as building blocks for advanced logic systems. For example, in previous publications we described an approach to constructing arithmetic units from optical logic elements.

关键词： optical logic semiconductor optical amplifiers cross gain modulation all optical logic OR NOR XOR NXOR optical logic gates

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Signal processing in an acousto-optical spectral colorimeter.

Signal processing in an acousto-optical spectral colorimeter...

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2nd International conference on Lasers for Measurement and information Transfer

作者： Emeljanov, SP Kludzin, VV Kochin, LB Medvedev, SV Polosin, LL Sokolov, VK DF Ustinov Baltic State Tech Univ Voenmekh St Petersburg 198005 Russia

ISBN: (纸本)0819444197

The algorithms of spectrometer signals processing in the acousto-optical spectral colorimeter, proposed earlier are discussed. This processing is directional on distortion elimination of an optical system spectral characteristics and photoelectric transformations, and also for calculation of tristimulus coefficients X, Y, Z in an international colorimetric system of a CIE - 31 and transformation them in coordinates of recommended CIE uniform contrast systems LUV and LAB.

关键词： Spectroscopy Signal processing Spectral resolution Distortion Calibration Metrology Numerical modeling Photodetectors Measurement devices optical filters

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Photonic applications in wireless terminal networks

Photonic applications in wireless terminal networks

引用

conference on WDM and Photonic Switching devices for Network Applications iii

作者： Shi, Z Yang, JY Chen, R Foshee, JJ Univ Texas Microelect Res Ctr Austin TX 78758 USA

ISBN: (纸本)0819443921

Wireless communications are rapidly becoming the means of data and information transfer for a broad range of applications. As wireless communication applications continue to expand, the information transfer rates are evolving toward the Gigabit per second data rate and, for some applications, there is even a need for terabit per second data rate transfer in the wireless network. In addition, wireless terminals often require instantaneous switching and communications between network members. For most applications directional antennas are needed to support the high data throughput requirements, and phased array antennas are the only high gain, directional antennas that can be rapidly switched to provide instantaneous communications among network members scattered geographically. Wireless terminal equipment is currently designed to operate in the 1 to 60 GHz frequency range and, traditionally, these equipment are designed with RF hardware. More recently, optics technology has been demonstrated to play an important role in RF systems as the True-Time-Delay in the phased array antenna, and, for some systems operating at high data rates, optical interconnects at the baseband level require E-O and O-E conversions. This paper discusses the considerations in using optics technology in the design of the wireless terminal network including optical signal processing, optical backplanes, optical networking, optical interconnects, and optical components. This paper also describes the architecture of an RF wireless communications network using a range of optical technologies.

关键词： photonic RF communication network optical interconnection optical signal process

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A robust texture, segmentation algorithm based on the Fourier spectrum analysis

A robust texture, segmentation algorithm based on the Fourie...

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conference on Optomechatronic systems iii

作者： Pfeifer, T Sack, D Orth, A Rhein Westfal TH Aachen Lab Machine Tools & Prod Engn WZL D-52056 Aachen Germany

ISBN: (纸本)0819446890

This paper presents a segmentation algorithm for image processing, which is able to distinguish the background's area from the object's area based only on their texture characteristics. The main goal is to develop a segmentation algorithm which does not need any prior information about the object (form, colours, textures, brightness etc.) and which is also robust against industrial conditions (such as shadow effects and electromagnetic noise). The developed solution is based on a predefined and structured background (with a specific frequency in the grey values). The background frequency is compared with the object's texture frequency using a Fourier analysis together with a classification algorithm. Two different types of classification algorithms have been applied: statistical covariance analysis and Neural Networks. The algorithm has been evaluated using real textile images under distinct conditions showing a very appropriated result with a segmentation error smaller than 0,5% in the average. The paper finishes with a set of conclusions and perspectives for future works.

关键词： automation Fourier Transform image processing metrology neural network textile industry vision

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Development of an abbreviated-typed three-dimensional optical measuring apparatus for textile

Development of an abbreviated-typed three-dimensional optica...

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conference on Optomechatronic systems iii

作者： Komatsubara, R Techno Arts Lab. Co. Ltd. (Japan)

ISBN: (纸本)0819446890

This research evaluates the objectivity of textile goods by using the non-contact three dimensional measuring method. The object of the measurement is a seam and wrinkle of the shirt. The evaluation of textile goods was due to watching, and it was difficult to do an absolute evaluation. The existing three-dimensional measurement device is made to correspond to textile goods, and we convert into the series to which ruggedness information is decided by ISO and can output it. The measurement device uses the pattern projection method which introduces the phase shift, and can do high density measurement in a short time. Technical paper of ISO is made for this measurement device, and the work of standardization is proceeded.

关键词： Measurement devices Standards development 3D image processing 3D metrology Phase shifts CCD cameras Data acquisition Image analysis Inspection optical testing

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Plenary speech iii: visual appearance modeling and perception with retinal and cortical signal processing

Plenary speech III: visual appearance modeling and perceptio...

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International conference on information Fusion

作者： B.K. Ghosh Washington University Saint Louis USA

Summary form only given. This talk focuses on the problem of shape estimation using multiple views from a land based mobile robot equipped with CCD cameras and a laser range finder that can compute the range of a target along a fixed horizontal plane. The talk surveys the problem of shape estimation from optical flow of points, lines and algebraic curves and emphasizes the fusion of camera and range sensors. Inspired from Neuroscience, the talk also introduces the role of cortical flow to the problem of encoding visual input signals and subsequently decoding these inputs using maximum likelihood estimates. To end the talk, we model the appearance of an object using principal component analysis and argue the role of appearance dynamics as an alternative to optical flow based algorithms.

关键词： Speech processing Retina Signal processing optical sensors Shape Robot vision systems Cameras optical signal processing Image motion analysis Mobile robots

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Legacy of optical information processing

Legacy of optical information processing

引用

conference on Photonic devices and algorithms for Computing iii

作者： Yu, FTS Penn State Univ Dept Elect Engn University Pk PA 16802 USA

ISBN: (纸本)0819441848

optical information processing can perform a myriad of signal processing operations. It is primarily due to the complex amplitude processing capability. optical information processors are capable of performing one- or two-dimensional operations using simple linear operators. However, it would not happen without the support of coherent property of illumination. In this paper we shall discuss the inherent optical complex transformation, by which information data processing can be exploited. Fourier and spatial domain processing, composite filtering, 3-D pattern recognition, larger capacity photo-refractive processing, optical neural computing and others will be stressed.

关键词： optical information processing image processing signal processing spatial domain processing

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Photonic devices and algorithms for computing iii

Photonic devices and algorithms for computing III

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Photonic devices and algorithms for Computing iii

The proceedings contains 26 papers from the conference on Photonic devices and algorithms for Computing iii. Topics discussed include: legacy of optical information processing;planar-waveguide-type optical switching devices;optoelectronic techniques for real-time pattern recognition;strange attractor in optical logic cells and training an associative memory model for character recognition.

关键词： optical data processing

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Fully-interconnected neural network system based on optical broadcast

Fully-interconnected neural network system based on optical ...

引用

conference on algorithms and systems for optical information processing V

作者： Ruiz-Llata, M Lamela, H Warde, C Univ Carlos Madrid 3 Dept Ingn Elect Elect & Automat E-28911 Leganes Spain

ISBN: (纸本)0819441856

In this paper we present a novel hardware architecture of a neural network system based on optoelectronic devices and electronic techniques. The main characteristics of the architecture are that is fully interconnected, the interconnections are fully programmable, it avoids optical alignment problems, and is readily scalable to large numbers of pixel neurons. Description, experimental demonstration and discussion of the behavior of the architecture are presented.

关键词： hardware neuroprocessor optoelectronic neural network optical interconnections electronic processing

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