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Applications of Computer Vision, Proceedings, 1992., IEEE Workshop on

Date Nov. 30 1992-Dec. 2 1992

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Displaying Results 1 - 25 of 37
  • Proceedings. IEEE Workshop on Applications of Computer Vision (Cat. No.92TH0446-5)

    Publication Year: 1992
    Request permission for commercial reuse | PDF file iconPDF (50 KB)
    Freely Available from IEEE
  • A system for obstacle detection during rotorcraft low-altitude flight

    Publication Year: 1992, Page(s):92 - 99
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (788 KB)

    Airborne vehicles such as rotorcraft must avoid obstacles such as antennas, towers, poles, fences, tree branches, and wires strung across the flight path. The paper analyzes the requirements of an obstacle detection system for rotorcrafts in low-altitude Nap-of-the-Earth flight based on various rotorcraft motion constraints. It argues that an automated obstacle detection system for the rotorcraft ... View full abstract»

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  • A new methodology for isolating and diagnosing inconsistencies in image matching, as applied to the analysis of 2-D electrophoretic gels

    Publication Year: 1992, Page(s):197 - 204
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (620 KB)

    An image comparison algorithm employing a new notion of match consistency has been developed for the application of mutation detection on images of two-dimensional electrophoretic gels. The application requires a very high degree of accuracy in image comparison due to the rareness of mutation. The image comparison algorithm achieves high accuracy through monitoring, isolating and diagnosing incons... View full abstract»

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  • New visual invariants for obstacle detection using optical flow induced from general motion

    Publication Year: 1992, Page(s):100 - 109
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (620 KB)

    To operate autonomous vehicles safely, obstacles must be detected before any path planning and obstacle avoidance activity is undertaken. In the paper, a novel approach to obstacle detection is developed. New visual linear invariants based on optical flow have been developed. Employing the linear invariance property, obstacles an be directly detected by using a reference flow line obtained from me... View full abstract»

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  • Scale-space clustering and classification of SAR images with numerous attributes and classes

    Publication Year: 1992, Page(s):74 - 81
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1016 KB)

    Describes application of scale-space clustering to the classification of a multispectral and polarimetric SAR image of an agricultural site. After polarimetric and radiometric calibration and noise cancellation, the authors extracted a 12-dimensional feature vector for each pixel from the scattering matrix. The algorithm was able to partition without supervision a set of unlabeled vectors from 13 ... View full abstract»

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  • A shape analysis model with applications to a character recognition system

    Publication Year: 1992, Page(s):182 - 189
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (700 KB)

    A method for the recognition of multifont printed characters is proposed, giving emphasis to the identification of structural descriptions of character shapes using prototypes. Noise and shape variations are modeled as series of transformations from groups of features in the data to features in each prototype. Thus, the method manages systematically the relative distortion between a candidate shap... View full abstract»

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  • Visual processing for autonomous driving

    Publication Year: 1992, Page(s):164 - 171
    Cited by:  Papers (8)  |  Patents (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (592 KB)

    Describes a visual processing algorithm that supports autonomous road following. The algorithm requires that lane markings be present and attempts to track the lane markings on both lane boundaries. There are three stages of computation: extracting edges; matching extracted edge points with a geometric model of the road, and updating the geometric road model. All processing is confined to the 2-D ... View full abstract»

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  • A multiscale analysis model applied to natural surfaces

    Publication Year: 1992, Page(s):146 - 153
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (728 KB)

    Multiscale Analysis of surfaces allows a hierarchical representation of their composing features. To represent a surface at a given scale, structures that are insignificant at that scale have to be eliminated. A typical example for this approach is cartography. However, the aims of cartographers reach beyond simply gradually eliminating the structures; in the majority of cases, the nature of geomo... View full abstract»

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  • The RegiStar Machine: from conception to installation

    Publication Year: 1992, Page(s):224 - 231
    Cited by:  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (708 KB)

    The authors have developed a machine to perform the task of automatic registration of color separation films, a process manually performed by skilled professionals in the graphics arts printing industry. The development of such a machine requires overcoming significant challenges: designing a sound computer vision methodology while respecting hard timing constraints, transferring software across p... View full abstract»

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  • Fiber identification in microscopy by ridge detection and grouping

    Publication Year: 1992, Page(s):205 - 212
    Cited by:  Papers (2)  |  Patents (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (968 KB)

    In microscopy, a common task is the identification of individual objects having some particular shape, after which various features can be measured and feature statistics taken over the set of objects. The identification process can be automated by applying appropriate computer vision techniques. The author addresses the specific problem of fiber identification. Fibers appear as thin lines or curv... View full abstract»

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  • Interpolation of cinematic sequences

    Publication Year: 1992, Page(s):36 - 44
    Cited by:  Papers (1)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (864 KB)

    Presents a new algorithm for interframe interpolation of cinematic sequences. The authors demonstrate its applicability to video data compression of pedestrian traffic and data compression for video conferencing. In both of these applications it is assumed that the background is nearly stationary and that there are no interobject occlusions. The interpolation algorithm makes use of estimates of op... View full abstract»

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  • Adaptive control techniques for dynamic visual repositioning of hand-eye robotic systems

    Publication Year: 1992, Page(s):110 - 117
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (640 KB)

    Using active monocular vision for 3-D visual control tasks is difficult since the translational and the rotational degrees of freedom are strongly coupled. The paper addresses several issues in 3-D visual control and presents adaptive control schemes for the problem of robotic visual servoing (eye-in-hand configuration) around a static rigid target. The objective is to move the image projections o... View full abstract»

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  • Algorithms for a fast confocal optical inspection system

    Publication Year: 1992, Page(s):298 - 305
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (632 KB)

    Confocal imaging is an emerging technique for the measurement of surface topography in inspection. The authors present a system designed for fast acquisition and processing of confocal images, which consists of an optical front end using tilted confocal scanning, and an image processing module. The function of the image processing module is to improve signal resolution, perform smoothing and detec... View full abstract»

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  • A segmentation method for multi-connected particle delineation

    Publication Year: 1992, Page(s):240 - 247
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (596 KB)

    An automatic particle segmentation system is developed for calculating the size distribution of rock fragments created by blasting. A rock composite due to blasting is often fully multi-connected in which individual particles cannot be delineated by the existing segmentation algorithms. Two algorithms are proposed to approach this multi-connected segmentation problem. The first algorithm analyzes ... View full abstract»

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  • Target tracking and range estimation using an image sequence

    Publication Year: 1992, Page(s):84 - 91
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (648 KB)

    Describes a new method of tracking targets across a sequence of images and estimating the range of these tracked objects from the camera. The motion of the camera between the successive frames is assumed to be known. The distance from the sensor to the objects is assumed to be much larger than the physical dimensions of the object. the approach presented makes use of the known sensor motion to gen... View full abstract»

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  • A segmentation-free approach to OCR

    Publication Year: 1992, Page(s):190 - 196
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (524 KB)

    When confronted with degraded images of text, however, the performance of many commercial OCR systems deteriorates severely. This occurs because all these systems rely on a segmentation step that is prone to error in the presence of image noise and printing artifacts. The authors present a novel OCR approach that overcomes this problem by eliminating the segmentation step altogether. This approach... View full abstract»

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  • Recovering building structures from stereo

    Publication Year: 1992, Page(s):64 - 73
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (928 KB)

    Addresses the problem of extracting polyhedral building structures from a stereo pair of aerial intensity images. The authors describe a system that computes a hierarchy of descriptions such as segments, junctions, and links between junctions from each view, and matches these features at the different levels. Such high level features not only help reduce correspondence ambiguity during stereo matc... View full abstract»

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  • Autonomous landing of airplanes by dynamic machine vision

    Publication Year: 1992, Page(s):172 - 179
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (608 KB)

    The 4D approach to dynamic machine vision has been validated for the application area of on-board autonomous landing approaches in the visual flight regime with computing technology available today; sensors are a video-camera, inertial gyros and an air velocity meter. The key feature of the method is the reconstruction and servo-maintained adjustment by prediction error feedback of an internal spa... View full abstract»

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  • CARTRACK: computer vision-based car following

    Publication Year: 1992, Page(s):156 - 163
    Cited by:  Papers (15)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (704 KB)

    CARTRACK is a computer vision system that can reliably detect, track, and measure vehicle rears in images from a video camera in a following car. The system exploits the symmetry property typical for the rear of most vehicles on normal roads. The authors present two novel methods for detecting mirror symmetry in images, one based directly on the intensity values and another one based on a discrete... View full abstract»

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  • Shape recovery methods for visual inspection

    Publication Year: 1992, Page(s):136 - 145
    Cited by:  Papers (1)  |  Patents (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (888 KB)

    The advancement of three-dimensional machine vision is closely related to the development of robust and efficient shape recovery methods. The author addresses the recovery problem associated with three different classes of surfaces: (a) specular surfaces; (b) surfaces with varying reflectance; and (c) rough and textured surfaces. Three realtime machine vision systems have been developed based on t... View full abstract»

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  • Curve recognition using B-spline representation

    Publication Year: 1992, Page(s):213 - 220
    Cited by:  Papers (7)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (648 KB)

    The B-spline stands as one of the most efficient curve (surface) representation, and possesses very attractive properties such as spatial uniqueness, boundedness and continuity, local shape controllability, and invariance to affine transformations. These properties made them very attractive for curve representation in computer aided design and computer graphics. Very little work, however, has been... View full abstract»

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  • Performance assessment of model-based tracking

    Publication Year: 1992, Page(s):28 - 35
    Cited by:  Papers (22)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (740 KB)

    Model-based vision techniques, originally developed for the recognition and pose recovery of vehicles in a single image, are used here to track vehicles through a sequence of images. Knowledge of the position of the camera with respect to the ground plane is used to reduce the search space of possible vehicle positions from six dimensions to three. The expected dynamics of vehicles are expressed i... View full abstract»

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  • A vision system for inspection of ball bonds in integrated circuits

    Publication Year: 1992, Page(s):290 - 297
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (552 KB)

    The paper describes a vision system for automatic inspection of the connecting part of the wire bond of an IC where the wire connects to the bond pad on the chip. It considers a popular type of such bonds known as `ball bond'. Using two-dimensional images taken from the top of the IC wafer, the system determines several geometric measures which are important in determining the quality of the bond.... View full abstract»

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  • Point target detection in spatially varying clutter

    Publication Year: 1992, Page(s):232 - 239
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (472 KB)

    The authors develop and analyze high-speed algorithms for the detection of point targets in infrared (IR) images with spatially varying clutter. Current target detection systems are effective in detecting bright targets in a uniform sky, but in areas of strong clutter are either unable to detect targets reliably or are limited by high false alarm rates. The authors assume that target and sensor mo... View full abstract»

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  • Interactive road finding for aerial images

    Publication Year: 1992, Page(s):56 - 63
    Cited by:  Papers (7)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (624 KB)

    Fully automatic road recognition remains an elusive goal in spite of many years of research. Most practical systems today use tedious manual tracing for the entry of data from satellite and aerial images to geographical data bases. The paper presents a semi-automatic method for the entry of such data. First ribbons of high contrast are found by analyzing gray scale surface principal curvatures. Th... View full abstract»

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