[1992] Proceedings IEEE Workshop on Applications of Computer Vision

30 Nov.-2 Dec. 1992

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Displaying Results 1 - 25 of 37
  • A visually guided mobile robot acting in indoor environments

    Publication Year: 1992, Page(s):180 - 316
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (13 KB)

    The paper describes the practical implementation of a vision-based navigation system for a mobile robot operating in indoor environments. The robot acquires visual information by means of three CCD cameras mounted on board. A stereo pair is used for ground plane obstacle detection and avoidance, while the third camera is used to locate landmarks and compute the robot's position. Odometric readings... 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 (5)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (627 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 vision system for inspection of ball bonds in integrated circuits

    Publication Year: 1992, Page(s):290 - 297
    Cited by:  Papers (4)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (547 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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  • Restoration of scanning probe microscope images

    Publication Year: 1992, Page(s):282 - 289
    Cited by:  Papers (13)  |  Patents (4)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (481 KB)

    Scanning probe microscopy (SXM), which includes techniques such as scanning tunneling microscopy (STM) and scanning force microscopy (SFM), is becoming popular for 3D metrology in the semiconductor industry and for high resolution 3D imaging of surfaces in Materials Science and Biology. The authors present imaging models for SXM that take into account the effect of probe geometry on topographic im... View full abstract»

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  • Real time color purity and convergence measurement algorithms for automatic ITC adjustment system

    Publication Year: 1992, Page(s):274 - 281
    Cited by:  Papers (4)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (620 KB)

    In manufacturing CPT (Color Picture Tubes) used in TV sets and monitors, an ITC (Integrated Tube Components) adjustment process is involved. Automating the ITC adjustment process needs fast and robust visual sensing/measurement. Real time color purity and convergence measurement algorithms are described. Existing color purity measurement algorithms for ITC adjustment system often take too much tim... View full abstract»

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  • Automated direct patterned wafer inspection

    Publication Year: 1992, Page(s):266 - 273
    Cited by:  Papers (5)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (535 KB)

    A self-reference technique is developed for detecting the location of defects in repeated pattern wafers and masks. The application area of the proposed method includes inspection of memory chips, shift registers, switch capacitors, and CCD arrays. Using high resolution spectral estimation algorithms, the proposed technique first extracts the period and structure of repeated patterns from the imag... View full abstract»

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  • Interactive map conversion: combining machine vision and human input

    Publication Year: 1992, Page(s):255 - 264
    Cited by:  Papers (1)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (907 KB)

    The authors present an interactive map conversion system which combines a human operator's high level reasoning with machine perception under the Human-Machine Perceptual Cooperation (HMPC) paradigm. HMPC defines two channels of interaction: the focus of attention (FOA) by which the user directs the attention of machine perception, and context. As the user moves the FOA across a raster map display... 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 (5)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (591 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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  • Point target detection in spatially varying clutter

    Publication Year: 1992, Page(s):232 - 239
    Cited by:  Papers (2)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (466 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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  • The RegiStar Machine: from conception to installation

    Publication Year: 1992, Page(s):224 - 231
    Cited by:  Patents (3)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (700 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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  • Curve recognition using B-spline representation

    Publication Year: 1992, Page(s):213 - 220
    Cited by:  Papers (8)  |  Patents (1)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (640 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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  • Projectile impact detection and performance evaluation using machine vision

    Publication Year: 1992, Page(s):248 - 254
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (572 KB)

    The paper reports on the development of a machine vision system for assessing targeting accuracy of ballistic, projectile-firing weapon systems. Current techniques rely on either manual optical sighting or acoustic signature to locate the point of impact. Optical sighting, still the predominant method in many events, is manual and imprecise. Acoustic-based approaches automate the process but requi... 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 (4)  |  Patents (7)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (962 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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  • 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 reuse | Click to expandAbstract | PDF file iconPDF (613 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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  • A segmentation-free approach to OCR

    Publication Year: 1992, Page(s):190 - 196
    Cited by:  Papers (5)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (518 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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  • 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 reuse | Click to expandAbstract | PDF file iconPDF (694 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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  • Autonomous landing of airplanes by dynamic machine vision

    Publication Year: 1992, Page(s):172 - 179
    Cited by:  Papers (18)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (602 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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  • Visual processing for autonomous driving

    Publication Year: 1992, Page(s):164 - 171
    Cited by:  Papers (9)  |  Patents (13)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (584 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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  • CARTRACK: computer vision-based car following

    Publication Year: 1992, Page(s):156 - 163
    Cited by:  Papers (18)  |  Patents (2)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (699 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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  • A multiscale analysis model applied to natural surfaces

    Publication Year: 1992, Page(s):146 - 153
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (722 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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  • Shape recovery methods for visual inspection

    Publication Year: 1992, Page(s):136 - 145
    Cited by:  Papers (2)  |  Patents (7)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (883 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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  • System-level design of specialized VLSI hardware for computing relative orientation

    Publication Year: 1992, Page(s):128 - 135
    Cited by:  Papers (1)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (635 KB)

    Determining the relative orientation between the coordinate systems of two cameras is central to binocular stereo, as well as to the long range motion vision. The author proposes a system-level design for specialized hardware to compute relative orientation in real-time. The problem is difficult for two reasons: one is the nonlinearity of the equations which must be solved, and which may possess m... View full abstract»

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  • Liquid crystal polarization camera

    Publication Year: 1992, Page(s):120 - 127
    Cited by:  Papers (14)  |  Patents (4)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (868 KB)

    Presents a fully automated system which unites CCD camera technology with liquid crystal technology to create a polarization camera capable of sensing the polarization of reflected light from objects at pixel resolution. As polarization affords a more general physical description of light than does intensity, it can therefore provide a richer set of descriptive physical constraints for the underst... 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 reuse | Click to expandAbstract | PDF file iconPDF (633 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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  • 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 reuse | Click to expandAbstract | PDF file iconPDF (613 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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