The authors evaluate several techniques for solving the symmetric tridiagonal problem based on the method of isospectral flow. Architectures which result from these considerations are discussed. Their advantages and d...
详细信息
ISBN:
(纸本)0892524669
The authors evaluate several techniques for solving the symmetric tridiagonal problem based on the method of isospectral flow. Architectures which result from these considerations are discussed. Their advantages and disadvantages, from the viewpoints of numerical accuracy and ease of implementation in VLSI, are investigated.
A software system to analyze the neuron images seen under light microscope is developed. The system is designed to process a large number of specimens semi-automatically and to store the processed images with a small ...
详细信息
ISBN:
(纸本)0892524707
A software system to analyze the neuron images seen under light microscope is developed. The system is designed to process a large number of specimens semi-automatically and to store the processed images with a small memory space. The authors took the simplest parameters of neuronal morphology, the soma and dendrites. Several methods of automatic soma classification are described.
A design is presented for a Content Addressable Array Parallel Processor (CAAPP), which is both practical and feasible. Its practicality stems from an extensive program of research into real applications of content ad...
详细信息
ISBN:
(纸本)0892524707
A design is presented for a Content Addressable Array Parallel Processor (CAAPP), which is both practical and feasible. Its practicality stems from an extensive program of research into real applications of content addressability and parallelism. The authors describe various procedures for image processing on the CAAPP. The first performs image convolutions very quickly. It is shown that this algorithm can be generalized to perform convolutions with increased mask size with only a moderate reduction in speed. The second uses the CAAPP to quickly and robustly decompose an optic flow field into its rotational and translational components to recover sensor motion parameters. We also briefly describe techniques for associating symbolic descriptions with extracted image structures in the CAAPP.
Proceedings includes 152 papers that are sub-divided into 28 sessions. Of the above number of papers, 27 are presented in the form of a summary or abstract only. These sessions deal with: signal processing, control sy...
详细信息
Proceedings includes 152 papers that are sub-divided into 28 sessions. Of the above number of papers, 27 are presented in the form of a summary or abstract only. These sessions deal with: signal processing, control systems, quantization, algorithms, pattern recognition, network protocols, digital communications, stochastic systems, identification and adaptive control, random processes, programming languages, linear systems, communication networks, routing, robust filtering and detection, fault diagnosis, 2-D filters, image processing, communication and noisy channels, nonlinear systems and filtering, multivariable control, databases, data structures, VLSI, tracking, parameter estimation, coding, realization theory, observability and multiprocessor systems. Topics considered include: mathematical techniques, geophysics, speech, probability and statistics, information retrieved, equalizers, optical communication, fiber optics, aircraft and helicopters, computer architecture, data storage, coding, logic devices, printed circuits, spacecraft, and cryptography.
This paper addresses two fundamental issues involved in the reconstruction of a multidimensional sequence from either the phase or magnitude of its Fourier transform. The first issue relates to the uniqueness of a mul...
详细信息
This paper addresses two fundamental issues involved in the reconstruction of a multidimensional sequence from either the phase or magnitude of its Fourier transform. The first issue relates to the uniqueness of a multidimensional sequence in terms of its phase or magnitude. Although phase or magnitude information alone is not sufficient, in general, to uniquely specify a sequence, a large class of sequences are shown to be recoverable from their phase or magnitude. The second issue which is addressed in this paper concerns the actual reconstruction of a multidimensional sequence from its phase or magnitude. For those sequences which are uniquely specified by their phase, several practical algorithms are described which may be used to reconstruct a sequence from its phase. Several examples of phase-only reconstruction are also presented. Unfortunately, however, even for those sequences which are uniquely defined by their magnitude, it appears that a practical algorithm is yet to be developed for reconstructing a sequence from only its magnitude. Nevertheless, an iterative procedure which has been proposed is briefly discussed and evaluated.
On-line identification methods for dynamic systems traditionally assume given-order rational models. The class of finite shift-rank processes includes processes with rational models of arbitrary order and, if the obse...
详细信息
Lip-reading is widely used by profoundly deaf individuals for the reception of the spoken language. This is a very difficult task because the labial image is ambiguous, The final goal of this work is to provide the de...
详细信息
Lip-reading is widely used by profoundly deaf individuals for the reception of the spoken language. This is a very difficult task because the labial image is ambiguous, The final goal of this work is to provide the deaf person with additional information (or "keys") which disambiguate the labial image. Phoneme recognition in continuous speech is used to produce the keys. To allow complete freedom in running speech, and in order to provide keys synchronously with speech production, no lexical, syntactical or semantical informations are used. algorithms are adapted to a given speaker through a learning phase where prototypes are built for the phonetic units to be recognized. Recognition algorithms are a combination of segmentation and centisecond labeling. The keys system is optimized taking into account the confusions made by the recognition programs. Recognition scores for multiple speakers are indicated both at the phonetic level and at the keys level.
A computational model of the processes involved in multispectral remote sensing and data classification is being developed as a tool for designing smart sensors which can process, edit and classify the data that they ...
详细信息
A special-purpose computer for processingvideo signals in radar systems is presented. The main part of the computer is an array ofQprocessing elements (PEs), all driven by the same microprogrammed control block. Each...
详细信息
A special-purpose computer for processingvideo signals in radar systems is presented. The main part of the computer is an array ofQprocessing elements (PEs), all driven by the same microprogrammed control block. Each PE handles four bits in parallel, and carries out arithmetic and logic operations on operands from 4–16 bits long. It contains a local memory and an unconventional microprocessor designed to be custom integrated on a 40-pin chip. A set of problem-oriented instructions has been defined, giving efficient implementation of algorithms used in radar computations. The computer can assume different configurations, making it suitable for a large class of radar systems.
A method is proposed for the digital reconstruction of images from their projections based on optimising specified performance criteria. The reconstruction problem is embedded into the framework of constrained optimis...
详细信息
A method is proposed for the digital reconstruction of images from their projections based on optimising specified performance criteria. The reconstruction problem is embedded into the framework of constrained optimisation and its solution is shown to lead to a relationship between the image and the one-dimensional Lagrange functions associated with each cost *** types of geometries (the parallel-beam and fan-beam systems) are considered for the acquisition of projection data and the constrained-optimisation problem is solved for both. The ensuing algorithms allow the reconstruction of multidimentional objects from one-dimensional functions *** digital data a fast reconstruction algorithm is proposed which exploits the symmetries inherent in both a circular domain of image reconstruction and in projections obtained at equispaced angles. Computational complexity is significantly reduced by the use of fast-Fourier-transform techniques, as the underlying relationship between the available projection data and the associated Lagrange multipliers is shown to possess a block circulant matrix structure.
暂无评论