Proceedings Third IEEE Workshop on Applications of Computer Vision. WACV'96

2-4 Dec. 1996

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  • Proceedings Third IEEE Applications Of Workshop On Computer Vision

    Publication Year: 1996, Page(s):iii - viii
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    Freely Available from IEEE
  • Color and texture fusion: application to aerial image segmentation and GIS updating

    Publication Year: 1996, Page(s):2 - 7
    Cited by:  Papers (7)  |  Patents (1)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (1000 KB)

    The paper describes an algorithm for combining color and texture information for the segmentation of color images. The algorithm uses maximum likelihood classification combined with a certainty based fusion criterion. The algorithm was validated using mosaics of real color textures. It was also tested on real outdoor color scenes and aerial images. This algorithm is part of a more complex system w... View full abstract»

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  • Cartographic indexing into a database of remotely sensed images

    Publication Year: 1996, Page(s):8 - 14
    Cited by:  Papers (9)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (1004 KB)

    The paper aims to develop simple statistical methods for indexing line patterns. The application vehicle used in this study involves indexing into an aerial image database using a cartographic model. The images contained in the database are of urban and semi urban areas. The cartographic model represents a road network known to appear in a subset of the images contained within the database. There ... View full abstract»

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  • Control of scene reconstruction using explicit knowledge

    Publication Year: 1996, Page(s):15 - 20
    Cited by:  Papers (2)  |  Patents (2)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (1020 KB)

    Applications such as landscape planning, environmental monitoring, and flight and driving simulators have a high demand for realistic landscape models. Quantity, precision and the type of models ask for methods which automate the model generation by evaluation of remote sensing data. The presented modelling system AIDA tackles the demand for efficient representation and high realism by integrating... View full abstract»

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  • Detecting suspicious background changes in video surveillance of busy scenes

    Publication Year: 1996, Page(s):22 - 26
    Cited by:  Papers (13)  |  Patents (5)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (774 KB)

    Detecting background changes in scenes containing significant numbers of moving objects has several applications in video surveillance. One important example is the detection of suspicious packages left in busy airport terminals or train stations. The paper outlines a statistical approach to automatically detecting long term changes to the stationary component of a scene, and describes a prototype... View full abstract»

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  • A computer vision system to detect 3-D rectangular solids

    Publication Year: 1996, Page(s):27 - 32
    Cited by:  Papers (2)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (641 KB)

    We present a computer vision system to detect 3D rectangular objects. We first describe the method to detect rectangular solids in real video/images in arbitrary orientations, positions, distances from the camera and lighting. The method works by detecting junctions and adjacent edges of rectangular solids. If a rough reference image of the background is available, that can also be used. We have t... View full abstract»

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  • Performance evaluation of people tracking systems

    Publication Year: 1996, Page(s):33 - 38
    Cited by:  Papers (21)  |  Patents (1)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (756 KB)

    A tracking system outputs a separate motion trajectory for each moving object in a scene. The paper presents a problem of performance evaluation and performance metrics for real time systems that track people, or moving objects, in video sequences, and it proposes performance measurement methodology for such systems. Two approaches to measuring performance are presented. The first approach compare... View full abstract»

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  • Real-time recognition of activity using temporal templates

    Publication Year: 1996, Page(s):39 - 42
    Cited by:  Papers (94)  |  Patents (16)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (576 KB)

    A new view based approach to the representation and recognition of action is presented. The basis of the representation is a motion history image (MHI)-a static image where intensity is a function of the recency of motion in a sequence. We develop a recognition method which uses both binary and scalar valued versions of the MHI as temporal templates to match against stored instances of actions. Th... View full abstract»

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  • Mosaicing of paintings on curved surfaces

    Publication Year: 1996, Page(s):44 - 49
    Cited by:  Papers (4)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (1005 KB)

    The paper presents an approach for reconstructing images painted on curved surfaces. A set of monocular images is taken from different viewpoints in order to mosaic and represent the entire scene. By using a priori knowledge about the support surface of the picture, we derive the surface localization in the camera coordinate system. An automatic mosaicing method is applied on the patterned images ... View full abstract»

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  • Mosaic image generation on a flattened Gaussian sphere

    Publication Year: 1996, Page(s):50 - 55
    Cited by:  Papers (14)  |  Patents (1)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (705 KB)

    Mosaicing of images is the task of fusing a collection of images with smaller fields of view to obtain an image with a larger field of view. In order to accomplish this task, images should be geometrically and radiometrically corrected. We propose a new approach for perspective correction, useful when smaller images are gathered by rotating a camera with a fixed position. These images are projecte... View full abstract»

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  • Efficient image warping and super-resolution

    Publication Year: 1996, Page(s):56 - 61
    Cited by:  Papers (8)  |  Patents (3)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (803 KB)

    This paper introduces a new algorithm for enhancing image resolution from an image sequence. The approach we propose herein uses the integrating resampler proposed by M. Chiang and T. Boult (1996) as the underlying resampling algorithm. Moreover, it is a direct method, which is fundamentally different from the iterative, back-projection approaches proposed in previous work. We show that image warp... View full abstract»

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  • Passive navigation using focus of expansion

    Publication Year: 1996, Page(s):64 - 69
    Cited by:  Papers (4)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (554 KB)

    The goal of this work is to propose a method to solve the problem of passive navigation with visual means. The method is a two stage approach: matching of feature extracted from 2D images of a sequence at different times and egomotion parameter computation. Both algorithms are based on a least-square-error technique to minimize appropriate energy functions. Experimental results obtained in real co... View full abstract»

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  • Cartographic matching with millimetre radar images

    Publication Year: 1996, Page(s):70 - 76
    Cited by:  Papers (3)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (837 KB)

    This paper describes an application of the EM (expectation and maximisation) algorithm to the registration of incomplete millimetric radar images. The data used in this study consists of a series of nonoverlapping radar sweeps. Our registration process aims to recover transformation parameters between the radar-data and a digital map. The tokens used in the matching process are fragmented line-seg... View full abstract»

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  • Placing observers to cover a polyhedral terrain in polynomial time

    Publication Year: 1996, Page(s):77 - 82
    Cited by:  Papers (5)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (669 KB)

    The Art Gallery Problem is the problem of determining the number of observers necessary to cover an art gallery room such that every point is seen by at least one observer. This problem is well known and has a linear solution for the 2 dimensional case, but little is known in the 3-D case. In this paper we present a polynomial time solution for the 3-D version of the Art Gallery problem. Because t... View full abstract»

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  • Fast range image segmentation using high-level segmentation primitives

    Publication Year: 1996, Page(s):83 - 88
    Cited by:  Papers (11)  |  Patents (1)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (615 KB)

    In this paper we present a novel algorithm for very fast segmentation of range images into both planar and curved surface patches. In contrast to other known segmentation methods our approach makes use of high-level features (curve segments) as segmentation primitives instead of individual pixels. This way the amount of data can be significantly reduced and a very fast segmentation algorithm is ob... View full abstract»

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  • Video indexing through integration of syntactic and semantic features

    Publication Year: 1996, Page(s):90 - 95
    Cited by:  Papers (23)  |  Patents (6)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (799 KB)

    This paper proposes a content-based video indexing system which provides the functionalities necessary for automatic management of video data through integration of syntactic and semantic features. The proposed system has been applied to detection, classification and then indexing of news programs collected from different TV channels. Although the paper focuses on news programs, the same methods c... View full abstract»

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  • Histogram refinement for content-based image retrieval

    Publication Year: 1996, Page(s):96 - 102
    Cited by:  Papers (218)  |  Patents (13)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (1642 KB)

    Color histograms are widely used for content-based image retrieval. Their advantages are efficiency, and insensitivity to small changes in camera viewpoint. However, a histogram is a coarse characterization of an image, and so images with very different appearances can have similar histograms. We describe a technique for comparing images called histogram refinement, which imposes additional constr... View full abstract»

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  • Identifying nude pictures

    Publication Year: 1996, Page(s):103 - 108
    Cited by:  Papers (41)  |  Patents (7)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (765 KB)

    This paper demonstrates an automatic system for telling whether there are naked people present in an image. The approach combines color and texture properties to obtain a mask for skin regions, which is shown to be effective for a wide range of shades and colors of skin. These skin regions are then fed to a specialized grouper, which attempts to group a human figure using geometric constraints on ... View full abstract»

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  • An automated visual inspection of solder joints using 2D and 3D features

    Publication Year: 1996, Page(s):110 - 115
    Cited by:  Papers (3)  |  Patents (3)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (403 KB)

    In this paper, efficient techniques for solder joint inspection have been described. Using three layers of ring shaped LED's with different illumination angles, three frames of images are sequentially obtained. From these images the regions of interest (soldered regions) are segmented, and their characteristic features including the average gray level and the percentage of highlights-referred to a... View full abstract»

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  • Automated solder joint inspection system using optical 3-D image detection

    Publication Year: 1996, Page(s):116 - 122
    Cited by:  Papers (4)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (718 KB)

    An automated system has been developed for visually inspecting the solder joints of SMDs (Surface Mounted Devices). The system is capable of inspecting fine pitch components down to 0.3 mm pitch QFPs (Quad Flat Packages). A unique image detection method was also developed to obtain precise 3-D images of solder joints. The principle of a confocal microscope is employed but plural sensors are used t... View full abstract»

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  • Real time tracking of borescope tip pose

    Publication Year: 1996, Page(s):123 - 128
    Cited by:  Papers (2)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (690 KB)

    The authors present a technique for the real-time tracking of borescope tip pose. While borescopes are used on a regular basis to inspect machinery for wear or damage, knowing the exact location of a borescope is difficult due to its flexibility. They present a technique for incremental borescope pose determination consisting of off-line feature extraction and on-line pose determination. The featu... View full abstract»

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  • Object recognition using multiple view invariance based on complex features

    Publication Year: 1996, Page(s):129 - 134
    Cited by:  Papers (10)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (874 KB)

    Geometric invariants from multiple views provide useful information for 3D object recognition. However, conventional object recognition methods using invariants based on point features cannot achieve efficient recognition because of large amount of combinations of point features in invariant calculation. To avoid this problem, the authors propose to use more complex features. They adopt arrow junc... View full abstract»

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  • 3-D real-time gesture recognition using proximity spaces

    Publication Year: 1996, Page(s):136 - 141
    Cited by:  Papers (5)  |  Patents (4)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (609 KB)

    A 3D segment tracking approach to recognition of human pose and gestures is presented. The author has previously developed and refined a stereo based method, called the proximity space method, for acquiring and maintaining the track of object surfaces in 3-space. This method uses LoG filtered images and relies solely on stereo measurement to spatially distinguish between objects in 3D. The objecti... View full abstract»

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  • A real-time face tracker

    Publication Year: 1996, Page(s):142 - 147
    Cited by:  Papers (244)  |  Patents (68)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (728 KB)

    The authors present a real-time face tracker. The system has achieved a rate of 30+ frames/second using an HP-9000 workstation with a frame grabber and a Canon VC-Cl camera. It can track a person's face while the person moves freely (e.g., walks, jumps, sits down and stands up) in a room. Three types of models have been employed in developing the system. First, they present a stochastic model to c... View full abstract»

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  • 3L fitting of higher degree implicit polynomials

    Publication Year: 1996, Page(s):148 - 153
    Cited by:  Papers (30)
    Request permission for reuse | Click to expandAbstract | PDF file iconPDF (586 KB)

    Implicit polynomial 2D curves and 3D surfaces are potentially among the most useful object or data representations for use in computer vision and image analysis. This is because of their interpolation property, Euclidean and affine invariants, and Bayesian recognizers. The paper studies and compares various fitting algorithms in a unified framework of stability analysis. It presents a new robust 3... View full abstract»

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