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Digital image processing and visual communications Technologies in the Earth and Atmospheric Sciences II

ISBN: (纸本)0819410209

This conference proceedings contains 23 papers. The topics discussed are earth imagery, remote sensing, geographical information systems, multispectral imagery, map databases, image databases, image storage and retrieval, visualization, environmental monitoring, forest monitoring, ocean monitoring, image processing, image analysis, neural network applications, feature extraction, computer vision, vision algorithms, and learning algorithms.

关键词： Remote sensing

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visual communications and image processing '93, Cambridge, MA, USA, November 7–12, 1993

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Materials Science and Engineering: B 1993年第3期19卷 290-290页

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HIGH-QUALITY NETWORKING OF AUDIOvisual INFORMATION

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IEEE communications MAGAZINE 1993年第9期31卷 84-95页

作者： JAYANT, N AT&T Bell Labaratories USA

An overview of low bit rate coding and the interaction between source coding and channel coding is presented. The interaction of coding with networking in a multiuser environment, including algorithms for robust coding which anticipate imperfect network performance, and techniques of decoding a signal that has traversed an imperfect network are described. The performances of such algorithms are illustrated with examples from speech, audio, and video transmission in the presence of packet losses. The challenges in measuring the quality of service (QOS) in the context of new algorithms for coding and networking and the difficulty of measuring QOS in the networking of multimedia information are discussed.< >

关键词： Bit rate Bandwidth image sampling Robustness Sampling methods Signal processing Speech coding Video compression image coding Asynchronous transfer mode

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FAST PARALLEL ALGORITHMS FOR REMOTE-SENSING image CLASSIFICATION

FAST PARALLEL ALGORITHMS FOR REMOTE-SENSING IMAGE CLASSIFICA...

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CONF ON DIGITAL image processing AND visual communications TECHNOLOGIES IN THE EARTH AND ATMOSPHERIC SCIENCES 2

作者： WANG, FJ Univ. of Guelph (Canada)

ISBN: (纸本)0819410209

Digital image classification is a computation intensive task. In remote sensing image analysis, a large proportion of computing time is spent on image classification. Reducing the time required for classification may largely improve the efficiency of image analysis. This is especially significant for real-time applications of remote sensing images. Parallel computing provides effective techniques for improving data processing efficiency. In this paper, three parallel classification algorithms for multiple spectral remote sensing images are described. The strategies for the parallel classification are discussed and experimental results are presented and analyzed.

关键词： Remote sensing image classification Computer programming Data processing image analysis Parallel computing image processing Parallel processing Computing systems Matrices

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PSYCHO-visual BASED DISTORTION MEASURE FOR MONOCHROME image COMPRESSION

PSYCHO-VISUAL BASED DISTORTION MEASURE FOR MONOCHROME IMAGE ...

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Meeting on visual communications and image Communication 93

作者： CHADDHA, N MENG, THY STANFORD UNIV INFORMAT SYST LABSTANFORDCA 94305

ISBN: (纸本)0819413690

In this paper we describe a quantitative distortion measure for judging the quality of compressed monochrome images based on a psycho-visual model. Our model follows the human vision perception in that the distortion as perceived by a human viewer is dominated by the compression error uncorrelated with the local features of the original image. We have performed subjective tests to obtain the ranking results for images which were compressed using different compression algorithms and compared the results with the rankings obtained using our distortion measure and other existing mean-square error based distortion measures. We have found that our distortion measure's ranking matches the subjective ranking perfectly where as the mean-square error and its variants are only 60% correct on the average.

关键词： Distortion image compression image filtering Digital filtering image quality visual process modeling Signal to noise ratio image processing Electronic filtering Signal processing

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Sequence coding based on the fractal theory of iterated tranformations systems

Sequence coding based on the fractal theory of iterated tran...

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visual communications and image processing 1993

作者： Reusens, Emmanuel Signal Processing Laboratory Swiss Federal Institute of Technology EPFL-Ecublens CII- 1015 Lausanne Switzerland

A new scheme for sequence coding based on the iterated functions systems theory is presented. The method relies on a 3D approach in which the sequence is adaptively partitioned. Each partition block can be coded either by using the spatial self similarities or by exploiting temporal redundancies. The proposed system shows very good performances when compared to other existing methods.

关键词： Fractal analysis image compression Computer programming Iterated function systems Distortion image processing Quantization 3D image processing Biology Signal processing

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SATELLITE image-processing USING A HAMMERING NEURAL-NETWORK 2

SATELLITE IMAGE-PROCESSING USING A HAMMERING NEURAL-NETWORK

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CONF ON visual INFORMATION processing 2

作者： GILBERT, DW GUSTAFSON, SC Univ. of Dayton (United States)

ISBN: (纸本)0819411973

It is shown that images with missing pixels can be approximately and usefully reconstructed using an interpolation function derived from as few as 10% of the original pixels in the image. The interpolation procedure uses Gaussian radial basis functions to `hammer' a plane to the given data points, where the basis function widths are calculated according to diagonal dominance criteria. In this paper the effectiveness of the reconstruction technique is investigated as a function of the degree of diagonal dominance.

关键词： Earth observing sensors Satellite imaging Satellites image restoration Neural networks image processing image transmission image quality visual information processing Satellite communications

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TECHNIQUE FOR image INTERPOLATION USING POLYNOMIAL-TRANSFORMS

TECHNIQUE FOR IMAGE INTERPOLATION USING POLYNOMIAL-TRANSFORM...

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Meeting on visual communications and image Communication 93

作者： ESCALANTERAMIREZ, B MARTENS, JB NATL AUTONOMOUS UNIV MEXICO FAC ENGNDIV GRADMEXICO CITY 04510DFMEXICO

ISBN: (纸本)0819413690

We present a new technique for image interpolation based on polynomial transforms. This is an image representation model that analyzes an image by locally expanding it into a weighted sum of orthogonal polynomials. In the discrete case, the image segment within every window of analysis is approximated by a finite set of polynomial coefficients. We show how the problem of interpolating an image can be approached by interpolating the smooth window function used to locally analyze the image. Comparison with the existing interpolation techniques illustrates the good performance of the method presented in this paper.

关键词： Transform theory image analysis image interpolation Computed tomography Medical imaging image restoration image filtering image processing image segmentation visual process modeling

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INTERACTIVE SPECIFICATION AND DATA SCHEMA FOR PICTURE PAINTING PROCESS

INTERACTIVE SPECIFICATION AND DATA SCHEMA FOR PICTURE PAINTI...

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Meeting on visual communications and image Communication 93

作者： HASHIMOTO, Y MURANO, T MURAO, Y ENOMOTO, H SHIBAURA INST TECHNOL FUKASA KUOMIYA 330JAPAN

ISBN: (纸本)0819413690

In a service process of a software system, an intention of a client is satisfied through the cooperative communication between the client and the server. For a description of specification of the system, it is necessary that this communication is explicitly represented as an interaction. This is called interactive specification. At the interaction of the picture painting process, the cooperative communication between client and server is done through the query of the picture data in the database. Picture data has much information compared with numerical or character data. This paper defines the data schema for picture painting so that the client can store, retrieve, and process the data in the database efficiently. This data schema also has an extended relational data model that has a hierarchical structure along the above process. Two types of schema are described in this paper. One is the denotation schema of interactive specification. Another is data schema for the picture painting process. They have the same idea of description.

关键词： image processing Databases Telecommunications Data modeling Eye Data processing visual communications Data communications Data storage image processing software

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image SEGMENTATION BY WAVELET-BASED AUTOMATIC THRESHOLD SELECTION

IMAGE SEGMENTATION BY WAVELET-BASED AUTOMATIC THRESHOLD SELE...

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Meeting on visual communications and image Communication 93

作者： OLIVO, JC EUROPEAN MOLEC BIOL LAB PHYS INSTRUMENTAT PROGRAMMED-69012 HEIDELBERGGERMANY

ISBN: (纸本)0819413690

A segmentation method using a peak analysis algorithm for threshold selection is presented. It is based on the detection of the zero-crossings and the local extrema of a wavelet transform which give a complete characterization of the peaks in the histogram. These values are used for the unsupervised selection of a sequence of thresholds describing a coarse-to-fine analysis of histogram variation. The results of using the proposed technique are presented in the case of different images.

关键词： image segmentation Wavelet transforms Wavelets Smoothing image processing algorithms and systems image resolution Digital filtering Discrete wavelet transforms Signal processing Statistical analysis

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