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Sixth Multidimensional Signal Processing Workshop,

6-8 Sept. 1989

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Displaying Results 1 - 25 of 159
  • Sixth Multidimensional Signal Processing Workshop (Cat. No.89TH0290-7)

    Publication Year: 1989
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    Freely Available from IEEE
  • Parallel algorithms and architectures for image analysis and computer vision

    Publication Year: 1989
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (34 KB)

    Summary form only given, as follows. The topic of multiprocessor computer architectures and parallel algorithms for computer vision is not new, but researchers are now addressing both a wider scope of issues and emphasizing system integration. Recently, a wide variety of new systems has been designed, built, and tested on a range of image analysis tasks. A critical question is how to achieve high ... View full abstract»

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  • Recent machine vision research in Japanese industry

    Publication Year: 1989
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (38 KB)

    Summary form only given, as follows. Four types of industrial vision systems are now being used in Japanese industry; these are vision systems based on the pattern matching method, pixel-counting method, feature-parameter extraction method, and slit-light method. These methods utilize, implicitly or explicitly, knowledge of objects and their environments, as well as knowledge of the processing sch... View full abstract»

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  • Motion parameter estimation-from spatial-temporal matching

    Publication Year: 1989, Page(s):9 - 10
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (81 KB)

    Summary form only given. The problems of determining the location of the epipoles of two displaced image planes when they are displaced due either to the motion of an object along the time axis or to the displacement of stereo cameras along the space axes have been investigated. It has been assumed that a rigid object moves with respect to still stereo camera systems.<> View full abstract»

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  • Spatio-temporal analysis using tensors

    Publication Year: 1989
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (82 KB)

    Summary form only given. A fundamental issue in the problem of finding an efficient algorithm for estimation of 3D orientation is how 3D orientation should be represented. A representation is regarded as suitable if it meets the three basic requirements of uniqueness, uniformity, and polar separability. A tensor representation suitable in the above sense has been obtained. The uniqueness requireme... View full abstract»

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  • Bootstrap algorithms for dynamic stereo vision

    Publication Year: 1989
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (86 KB)

    Summary form only given. The use of stereo vision is significantly simplified by using depth information computed from a narrow-baseline image pair to constrain the search for correspondence in wider-baseline images. Such images can be acquired by using a combination of motion and multiple cameras. This approach has been in terms of random field models and Bayesian estimation. Experimental results... View full abstract»

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  • The new advance on matching the gray value corners in image sequences

    Publication Year: 1989, Page(s):13 - 14
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (121 KB)

    Summary form only given. Matching approaches are considered, and the problems with correlation matching, namely how the size and shape of the window and the property of the correlation function are selected and the high cost of searching for the maximum in the detectable region, are discussed. A highly efficient matching method that addresses these problems is discussed.<> View full abstract»

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  • A method for building multiview models of curve surface objects

    Publication Year: 1989
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (65 KB)

    Summary form only given. A method has been developed for building multiview models of a curved surface by using direct input images from a camera, representing the curved contour with polygon approximation, and then taking the topological and region information of each project image as features of these models. The monocular camera is used to represent the relation of the camera focal length to th... View full abstract»

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  • Numerical analysis of visual patterns

    Publication Year: 1989
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (57 KB)

    Summary form only given, as follows. Similarities are found between spatial pattern analysis and other low-level cooperative image analysis tasks. Visual pattern analysis proceeds analogously via estimation of emergent 2D image frequencies. Unlike shape-from-X or optical flow paradigms, constraints are derived from the responses of multiple oriented spatial frequency channels rather than directly ... View full abstract»

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  • Object detection and recognition via stochastic model-based image segmentation

    Publication Year: 1989, Page(s):17 - 18
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (107 KB)

    Summary form only given. A stochastic model-based image segmentation technique that utilizes the tone descriptor for object detection and recognition has been developed. The image regions are characterized by region-dependent constant mean (average-gray level) and variance (variation of gray level), and the distribution of the regions is modeled by a stochastic model. For a nondiffracting computed... View full abstract»

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  • Artificial intelligence search application to isothermal contour detection in a thermal image

    Publication Year: 1989
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (63 KB)

    Summary form only given. The problem of isothermal contour detection has been reduced to the problem of finding an optimal path in a weighted tree. The properties of the contour are embedded in the structure of the tree. Graph searching techniques are then used to find the optimal solution. To search the optimal isothermal contours, a heuristic search algorithm has been adopted. The algorithm has ... View full abstract»

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  • Illumination modelling in 3D sonar images

    Publication Year: 1989
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (49 KB)

    Summary form only given. Software has been developed to obtain a 3D perspective view of Pacific Ocean bottom terrain by merging side-looking sonar images with ocean bottom terrain elevation data (bathymetry). The observer can be positioned at various locations and see the terrain from different viewpoints. However, the side-looking sonar images published by the USGS are mosaic images manually comp... View full abstract»

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  • Image processing system based on object oriented design

    Publication Year: 1989, Page(s):21 - 22
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (99 KB)

    Summary form only given. An innovative image processing system that is based on a conceptual model, i.e. an abstract representation of the application environment that is believed to provide flexibility and modularity in addition to other good properties is proposed. An object-oriented design was used. The objects in the system are instances of classes that capture the abstractions and encapsulate... View full abstract»

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  • Segmentation of multi-sensor images

    Publication Year: 1989
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (77 KB)

    Summary form only given. Regions of the images observed by each sensor have been modeled as noncausal Gaussian Markov random fields (GMRFs), and labeled images have been assumed to follow a Gibbs distribution. The region labeling algorithms then become functions of model parameters, and the multisensor image segmentation problems become inference problems, given multisensor parameter measurements ... View full abstract»

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  • Deterministic relaxation algorithms for edge detection and surface reconstruction

    Publication Year: 1989, Page(s):24 - 25
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (112 KB)

    Summary form only given. The regularization framework has been extended to treat the joint optimization of an intensity process and an observable line process. The network of processes tries to satisfy soft and hard constraints as it relaxes to an equilibrium state. These constraints are usually (i) closeness to data, (ii) the smoothness criterion (the parallel to regularization), and (iii) constr... View full abstract»

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  • Object boundary detection in image sequences using multistage hypothesis testing

    Publication Year: 1989
    Cited by:  Papers (1)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (83 KB)

    Summary form only given. It has been shown that multistage hypothesis testing can be applied to the detection of moving object boundaries. An object boundary is modeled as a collection of connected linear edge segments, each translating in a direction perpendicular to its orientation. The motion of each segment is estimated by posing a multiple hypothesis testing problem: a large number (1000's) o... View full abstract»

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  • Edge detection by 2D recursive least squares and Markov random fields

    Publication Year: 1989
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (44 KB)

    Summary form only given, as follows. An algorithm is presented for smoothing and segmenting images with regions characterized by constant intensity levels and/or textures. It is based on a doubly stochastic model of the data, where the local behavior is modeled by autoregressive equations with piecewise constant parameters, while the regions are modeled by a Markov random field (MRF). The edges of... View full abstract»

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  • Extracting lines using a modified Hough transformation

    Publication Year: 1989
    Cited by:  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (43 KB)

    Summary form only given, as follows. An efficient algorithm that extracts lines using a point and a direction parameters from an edge image is discussed. In this algorithm, a line equation is derived for every pair of two edge elements in the image, and lines are extracted using a one-dimensional accumulator (instead of a two-dimensional accumulator, as in the conventional Hough transform methods)... View full abstract»

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  • Model-based 2D edge detection using bottom-up strategy

    Publication Year: 1989, Page(s):30 - 31
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (90 KB)

    Summary form only given. It has been shown that a bottom-up strategy using an improved version of the optimized 2D edge filter fits the requirements of edge detection in real-world 2D images better than the top-down approach. The results are obtained by first operating on the full resolution, gradually restricting it to improve detection capabilities. The 2D filter has been applied to a bottom-up ... View full abstract»

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  • Object detection and classification using matched filtering and higher-order statistics

    Publication Year: 1989, Page(s):32 - 33
    Cited by:  Papers (9)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (149 KB)

    Summary form only given. If a known object is corrupted by additive white Gaussian noise, then the matched filter maximizes the output signal-to-noise ratio. The main drawback of the matched filter in two dimensions is its sensitivity to object shifts, rotation,, and scaling, especially in the presence of additive colored Gaussian noise of unknown covariance. These problems have been overcome by u... View full abstract»

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  • Edge detection using spectral estimation techniques

    Publication Year: 1989, Page(s):34 - 35
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (89 KB)

    Summary form only given. It has been shown that the problem of detecting edges in a digital image is equivalent to the problem of estimating the wave number vectors of complex exponentials in the spatial frequency domain. This observation has been used to show that most of the known non-model-based edge detection algorithms can be interpreted as variations of the periodogram method of spectral est... View full abstract»

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  • Frequency domain interpretation of accelerated translations

    Publication Year: 1989, Page(s):36 - 37
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (85 KB)

    Summary form only given. The frequency-domain analysis of translation with constant velocity and acceleration, i.e. translations quadratically depending on time, has been performed. The problem has been studied under the typical assumptions of a constant luminance/illuminance situation and uniform background (or background moving with the same type of motion of the scene objects), a situation enco... View full abstract»

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  • Superresolution inverse ultrasound scattering

    Publication Year: 1989
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (60 KB)

    Summary form only given, as follows., A new approach is developed to solve inverse-scattering-based ultrasound imaging. This technique is based on the inversion of the Lippman-Schwinger equation with the use of constraints. It is found that by requiring the impedance profile to be set of consecutive layers, one obtains a system of nonlinear equations, relating the reflection amplitude to the param... View full abstract»

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  • Multi-attribute processing techniques for the enhancement and interpretation of seismic data

    Publication Year: 1989
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (76 KB)

    Summary form only given. Seismic data are collected, displayed, and interpreted in the time-distance domain (t-x). Local attributes of seismic data can be grouped into conventional single trace attributes (x=constant). The extraction of multitrace attributes is based on a computer-efficient implementation of localized slant stacking (beamforming) and median filtering. Image processing techniques a... View full abstract»

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  • Radar detection of co-operative targets using dual polarized radar-a multidimensional, multichannel detection problem

    Publication Year: 1989
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (53 KB)

    Summary form only given, as follows. In certain circumstances, it is not possible to improve radar detection performance using conventional radar techniques, i.e. increased power, shorter pulse length, coherence, etc. If the radar polarization characteristics of the target are sufficiently different from those of the surrounding clutter environment, it is possible to improve detection through the ... View full abstract»

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