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[1992] Proceedings IEEE Workshop on Applications of Computer Vision

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
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    Freely Available from IEEE
  • 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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  • Performance assessment of model-based tracking

    Publication Year: 1992, Page(s):28 - 35
    Cited by:  Papers (24)
    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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  • Autonomous landing of airplanes by dynamic machine vision

    Publication Year: 1992, Page(s):172 - 179
    Cited by:  Papers (11)
    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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  • Voice-bandwidth visual communication through logmaps: the Telecortex

    Publication Year: 1992, Page(s):4 - 10
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (512 KB)

    Presents a robotic video telephone application of the Cortex-1 miniaturized space-variant active vision system. The embedded processor architecture of Cortex-1 enables it to implement a variety of functions not found in conventional video telephones, for example the camera tracks moving users with its pantilt mechanism. The authors also report an analog channel coding scheme to transmit logmap vid... 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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  • 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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  • 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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  • A shadow handler in a video-based real-time traffic monitoring system

    Publication Year: 1992, Page(s):11 - 18
    Cited by:  Papers (91)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (876 KB)

    A video-based system for traffic monitoring is presented. The objective of the system is to set up a high-level description of the traffic scene comprising the position, speed and class of the vehicles. Algorithms for detecting moving objects, separating the vehicles from their shadows, tracking and classification are presented. The classification of vehicles under sunny conditions is very difficu... 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 commercial reuse | Click to expandAbstract | PDF file iconPDF (640 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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  • A segmentation method for multi-connected particle delineation

    Publication Year: 1992, Page(s):240 - 247
    Cited by:  Papers (4)
    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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  • PROMAP-a system for analysis of topographic maps

    Publication Year: 1992, Page(s):46 - 55
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (876 KB)

    A system for automatic data acquisition from topographic maps (PROMAP-Processing of Maps) is presented. Maps are an important source of information for efficient spatial data evaluation using Geographic Information Systems (GIS). At present a lot of relevant maps have still to be digitized manually, which is a time-consuming and error-prone process. To improve the situation, the authors developed ... View full abstract»

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  • Automated direct patterned wafer inspection

    Publication Year: 1992, Page(s):266 - 273
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (540 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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  • 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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  • A segmentation-free approach to OCR

    Publication Year: 1992, Page(s):190 - 196
    Cited by:  Papers (2)
    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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  • Projectile impact detection and performance evaluation using machine vision

    Publication Year: 1992, Page(s):248 - 254
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (580 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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  • Restoration of scanning probe microscope images

    Publication Year: 1992, Page(s):282 - 289
    Cited by:  Papers (7)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (488 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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  • 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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  • CARTRACK: computer vision-based car following

    Publication Year: 1992, Page(s):156 - 163
    Cited by:  Papers (16)  |  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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  • Multiple object tracking system with three level continuous processes

    Publication Year: 1992, Page(s):19 - 27
    Cited by:  Papers (4)  |  Patents (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (812 KB)

    Reports a system for detecting human like moving objects in time-varying images. The authors show how it is possible to detect the image trajectories of people moving in ordinary indoor scenes. The system consists of three subprocesses: changing region detection, moving object tracking and movement interpretation. The processes are executed in parallel so hat each one can recover from the others' ... 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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  • Liquid crystal polarization camera

    Publication Year: 1992, Page(s):120 - 127
    Cited by:  Papers (12)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (876 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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  • 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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  • A visually guided mobile robot acting in indoor environments

    Publication Year: 1992, Page(s):180, 308 - 316
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (16 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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  • Interactive map conversion: combining machine vision and human input

    Publication Year: 1992, Page(s):255 - 264
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (912 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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