Proceedings of 1994 IEEE Workshop on Applications of Computer Vision

5-7 Dec. 1994

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  • Proceedings of 1994 IEEE Workshop on Applications of Computer Vision

    Publication Year: 1994
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    Freely Available from IEEE
  • A unified recognition and stereo vision system for size assessment of fish

    Publication Year: 1994, Page(s):2 - 9
    Cited by:  Papers (8)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (810 KB)

    This paper presents a unified recognition and stereo vision system which locates objects and determines their distances and sizes given stereo video input. Unlike other such systems, the recognition stage precedes and provides input to stereo processing. Model-based recognition is accomplished in two stages. The first stage seeks feature matches by comparing the absolute orientation, relative orie... View full abstract»

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  • An automated stereoscopic coal profiling system-CCLPS

    Publication Year: 1994, Page(s):10 - 17
    Cited by:  Papers (1)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (748 KB)

    This paper describes the design of a binocular stereo system called CCLPS (Computerized Coal Profiling System) that provides dense, accurate disparity maps of coal as it is being transported in open rail cars. After a quantitative analysis of previously developed cepstral correspondence techniques which highlights the shortcomings of the cepstrum's matching ability in the presence of random noise ... View full abstract»

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  • Precise visual inspection for LSI wafer patterns using subpixel image alignment

    Publication Year: 1994, Page(s):26 - 34
    Cited by:  Papers (8)  |  Patents (2)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (584 KB)

    This paper reports on an image processing algorithm and hardware for fast, precise inspection of LSI wafer patterns. In order to detect deep sub-micron defects such as 0.2 /spl mu/m at high speed by grayscale image comparison, we must overcome the sampling errors that inevitably occur between two images during detection. For this purpose, we have developed a subpixel image alignment algorithm that... View full abstract»

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  • Compilation of mosaics from separately scanned line drawings

    Publication Year: 1994, Page(s):36 - 43
    Cited by:  Papers (3)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (624 KB)

    In automatic line drawing interpretation (e.g. map interpretation), one of the problems encountered is the finite size of scanners, or that scanners of the required size are not available. Often, one large scan is necessary for the interpretation process, instead of several smaller ones generated by the usual scanning in parts. This paper describes a method for automatically compiling mosaics from... View full abstract»

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  • Image mosaicing for tele-reality applications

    Publication Year: 1994, Page(s):44 - 53
    Cited by:  Papers (166)  |  Patents (50)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (1345 KB)

    This paper presents some techniques for automatically deriving realistic 2-D scenes and 3-D geometric models from video sequences. These techniques can be used to build environments and 3-D models for virtual reality application based on recreating a true scene, i.e., tele-reality applications. The fundamental technique used in this paper is image mosaicing, i.e., the automatic alignment of multip... View full abstract»

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  • Real-time scene stabilization and mosaic construction

    Publication Year: 1994, Page(s):54 - 62
    Cited by:  Papers (108)  |  Patents (16)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (1072 KB)

    We describe a real-time system designed to construct a stable view of a scene through aligning images of an incoming video stream and dynamically constructing an image mosaic. This system uses a video processing unit developed by the David Sarnoff Research Center called the Vision Front End (VFE-100) for the pyramid-based image processing tasks required to implement this process. This paper includ... View full abstract»

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  • A robust cognitive approach to traffic scene analysis

    Publication Year: 1994, Page(s):65 - 72
    Cited by:  Papers (5)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (621 KB)

    A model based approach to monocular image sequence analysis of road traffic scenes is presented. Within this framework a vision system for applications like autonomous driving and collision avoidance was developed. The approach takes part in problems of selective and active vision. The fully automatic system MOSAIK recognizes and describes all visual vehicles on or near the road. It solves the pro... View full abstract»

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  • Real-time traffic monitoring

    Publication Year: 1994, Page(s):81 - 88
    Cited by:  Papers (44)  |  Patents (3)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (5249 KB)

    Traffic statistics desired by road engineers and planners, and "traffic warning" systems demand real-time performance which precludes the use of batch processing. We apply recent real-time trading techniques along with scene specific tuning of the dynamics to enable the tracker to accurately predict target location and thus reduce the amount of search and/or image processing required. The benefits... View full abstract»

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  • Modelling issues in vision based aircraft navigation during landing

    Publication Year: 1994, Page(s):89 - 96
    Cited by:  Papers (7)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (540 KB)

    This paper investigates the the feasibility of using visual and infrared imaging sensors to aid in the location of the aircraft position during operations such as landing in bad weather. The choice of the airport model used is crucial to algorithms which are used for position estimation based on pattern recognition. In this paper we describe the effects the choice of a model has on the behaviour o... View full abstract»

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  • A practical obstacle detection and avoidance system

    Publication Year: 1994, Page(s):97 - 104
    Cited by:  Papers (31)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (625 KB)

    A practical real-time system for passive obstacle detection and avoidance is presented. Range information is obtained from stereo images by first computing a disparity picture from the image pair and extracting points above the ground plane. Then these points are projected onto the ground plane and an Instantaneous Obstacle Map (IOM) is obtained. The IOM is transformed into a one dimensional steer... View full abstract»

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  • Application of optical flow for automated overtaking control

    Publication Year: 1994, Page(s):105 - 112
    Cited by:  Papers (2)  |  Patents (2)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (571 KB)

    In this paper the problem of automated control of a road vehicle is addressed. In particular, a system is presented where optical flow techniques are applied to monitor overtaking maneuvers of other vehicles coming from the rear of the car. During car driving, most visual information is conveyed by the motion perceived within the visual field. The proposed approach for overtaking control is based ... View full abstract»

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  • Using modeling and fuzzy logic to detect and track microvessels in conjunctiva images

    Publication Year: 1994, Page(s):114 - 120
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (627 KB)

    The conjunctiva is a thin membrane that covers the surface of the eye and reveals the small blood vessels of the microcirculation for detailed non-invasive study. The morphology of these vessels is of interest because structural changes in the vascular bed have been shown to occur coincident with certain diseases. Detecting these changes could be used as an early indication, leading to more timely... View full abstract»

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  • A system for automated iris recognition

    Publication Year: 1994, Page(s):121 - 128
    Cited by:  Papers (132)  |  Patents (8)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (746 KB)

    This paper describes a prototype system for personnel verification based on automated iris recognition. The motivation for this endeavour stems from the observation that the human iris provides a particularly interesting structure on which to base a technology for noninvasive biometric measurement. In particular, it is known in the biomedical community that irises are as distinct as fingerprints o... View full abstract»

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  • Recognizing a facial image from a police sketch

    Publication Year: 1994, Page(s):129 - 137
    Cited by:  Papers (6)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (878 KB)

    This paper presents a theory and practical computations for the recognition of a facial image given a police-artist sketch. First, the facial features of the police sketch are located automatically. Then, regions centered at these positions that contain high intensity variations are temporarily removed. Then a standardization step transforms the sketch image into a "photograph-like" image. After t... View full abstract»

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  • Parameterisation of a stochastic model for human face identification

    Publication Year: 1994, Page(s):138 - 142
    Cited by:  Papers (836)  |  Patents (4)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (398 KB)

    Recent work on face identification using continuous density Hidden Markov Models (HMMs) has shown that stochastic modelling can be used successfully to encode feature information. When frontal images of faces are sampled using top-bottom scanning, there is a natural order in which the features appear and this can be conveniently modelled using a top-bottom HMM. However, a top-bottom HMM is charact... View full abstract»

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  • Model supported exploitation: quick look, detection and counting, and change detection

    Publication Year: 1994, Page(s):144 - 151
    Cited by:  Papers (3)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (838 KB)

    Over the last several years the concept of model-supported exploitation (MSE) has evolved to a point where relatively simple computer vision algorithms can extract significant intelligence information from aerial images in a robust and reliable manner. Information extraction is enabled by the use of detailed 3D site models which provide an extensive context for the application of image analysis al... View full abstract»

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  • Task driven perceptual organization for extraction of rooftop polygons

    Publication Year: 1994, Page(s):152 - 159
    Cited by:  Papers (22)  |  Patents (3)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (642 KB)

    A new method for extracting planar polygonal rooftops in monocular aerial imagery is proposed. Structural features are extracted and hierarchically related using perceptual grouping techniques. Top-down feature verification is used so that features, and links between the features, are verified with local information in the image and weighed in a graph. Cycles in the graph correspond to possible bu... View full abstract»

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  • Model validation for change detection [machine vision]

    Publication Year: 1994, Page(s):160 - 167
    Cited by:  Papers (7)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (977 KB)

    An important application of machine vision is to provide a means to monitor a scene over a period of time and report changes in the content of the scene. We have developed a validation mechanism that implements the first step towards a system for detecting changes in images of aerial scenes. By validation we mean the confirmation of the presence of model objects in the image. Our system uses a 3-D... View full abstract»

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  • A system for aircraft recognition in perspective aerial images

    Publication Year: 1994, Page(s):168 - 175
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (904 KB)

    Recognition of aircraft in complex, perspective aerial imagery has to be accomplished in presence of clutter, occlusion, shadow, and various forms of image degradation. This paper presents a system for aircraft recognition under real-world conditions that is based on the use of a hierarchical database of object models. The particular approach involves three key processes: (a) The qualitative objec... View full abstract»

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  • Genetic labeling and its application to depalletizing robot vision

    Publication Year: 1994, Page(s):177 - 186
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (739 KB)

    Genetic labeling is a new labeling algorithm using Genetic Algorithm (GA). Although several applications of GA for low-level image processing such as line detection have been studied, they still require much computing time. We apply GA to the labeling for scene interpretation. The chromosome coding method we proposed is such that each bit represents the existence of an object. Genetic operation en... View full abstract»

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  • Recursive identification of gesture inputs using hidden Markov models

    Publication Year: 1994, Page(s):187 - 194
    Cited by:  Papers (39)  |  Patents (7)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (596 KB)

    Human-machine interfaces play a role of growing importance as computer technology continues to evolve. Motivated by the desire to provide users with an intuitive gesture input system, we describe the design of a recursive filter applied to the vision-based gesture interpretation problem. The gestures are modeled as a hidden Markov model with the state representing the gesture sequences, and the ob... View full abstract»

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  • Anatomy of a hand-filled form reader

    Publication Year: 1994, Page(s):195 - 204
    Cited by:  Papers (2)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (991 KB)

    We describe a prototype generic form reader (GFR) system for reading hand-filled forms. The system can read run-on or touching handprinted characters. A one-time form specification is required for each type of form that the system is expected to read. The form specification includes geometric location of registration marks and fields of interest, field grammars, and system parameters. The GFR begi... View full abstract»

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  • Application constraints in the design of an automatic reading device for analog display instruments

    Publication Year: 1994, Page(s):205 - 212
    Cited by:  Papers (3)  |  Patents (5)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (749 KB)

    An analysis system design based on experience with a successful application in the field of inspection and calibration of an analog display measuring instrument is presented in this paper. First the measuring instrument is divided into its primitiva, defining the a priori known parameter of the primitiva: shape, relative position and size. According to the shape of the primitiva pattern recognitio... View full abstract»

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  • Application of the controlled active vision framework to robotic and transportation problems

    Publication Year: 1994, Page(s):213 - 220
    Cited by:  Papers (1)  |  Patents (2)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (932 KB)

    Flexible operation of a robotic agent in an uncalibrated environment requires the ability to recover unknown or partially known parameters of the workspace through sensing. Of the sensors available to a robotic agent, visual sensors provide information that is richer and more complete than other sensors. In this paper we present robust techniques for the derivation of depth from feature points on ... View full abstract»

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