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Applications of Computer Vision, 2007. WACV '07. IEEE Workshop on

21-22 Feb. 2007

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  • IEEE Workshop on Applications of Computer Vision - Cover

    Publication Year: 2007, Page(s): c1
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  • IEEE Workshop on Applications of Computer Vision

    Publication Year: 2007, Page(s):i - iii
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  • IEEE Workshop on Applications of Computer Vision - Copyright

    Publication Year: 2007, Page(s): iv
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  • IEEE Workshop on Applications of Computer Vision - Table of contents

    Publication Year: 2007, Page(s):v - viii
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  • Preface

    Publication Year: 2007, Page(s): ix
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  • Organizing Committee

    Publication Year: 2007, Page(s): x
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  • Program Committee

    Publication Year: 2007, Page(s): xi
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  • Additional reviewers

    Publication Year: 2007, Page(s): xii
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  • Identity Verification Via the 3Bid Face Alignment System

    Publication Year: 2007, Page(s): 2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (517 KB) | HTML iconHTML

    The 3DID system has been developed to verify the identity of a person by matching a sensed 3D surface of the face to a face model stored during an enrollment process. Anchor point detection is performed based on shape index; then, a rigid alignment is determined between the observed and model face anchor points. The alignment is refined using a modified ICP algorithm allowing for trimming of 10% n... View full abstract»

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  • Local Graph Matching for Face Recognition

    Publication Year: 2007, Page(s): 3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (383 KB) | HTML iconHTML

    We represent face images by a set of triangular labeled graphs, each containing information on the appearance and geometry of a 3-tuple of face feature points. Our method automatically learns a model set and builds a graph space for each individual. A two-stage method for fast matching is developed, where in the first stage a maximum a posterior solution based on PCA factorization is used to effic... View full abstract»

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  • Facial Range Image Matching Using the ComplexWavelet Structural Similarity Metric

    Publication Year: 2007, Page(s): 4
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (290 KB) | HTML iconHTML

    We propose a novel 3D face recognition algorithm based on facial range image matching using the complex wavelet structural similarity metric (CW-SSIM) metric. Compared with many existing 3D surface matching methods, CWSSIM is computationally efficient and is robust to small geometrical distortions. Using a data set that contains 360 3D face models of 12 subjects, we tested the performance of the p... View full abstract»

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  • Performance Evaluation of Vision-Based Navigation and Landing on a Rotorcraft Unmanned Aerial Vehicle

    Publication Year: 2007, Page(s): 5
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4262 KB) | HTML iconHTML

    A rotorcraft UAV provides an ideal experimental platform for vision-based navigation. This paper describes the flight tests of the US Army PALACE project, which implements Moravec's pseudo-normalized correlation tracking algorithm. The tracker uses the movement of the landing site in the camera, a laser range, and the aircraft attitude from an IMU to estimate the relative motion of the UAV. The po... View full abstract»

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  • Nonlinear Mean Shift for Robust Pose Estimation

    Publication Year: 2007, Page(s): 6
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (604 KB) | HTML iconHTML

    We propose a new robust estimator for camera pose estimation based on a recently developed nonlinear mean shift algorithm. This allows us to treat pose estimation as a clustering problem in the presence of outliers. We compare our method to RANSAC, which is the standard robust estimator for computer vision problems. We also show that under fairly general assumptions our method is provably better t... View full abstract»

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  • Localization and Mapping for Autonomous Navigation in Outdoor Terrains : A Stereo Vision Approach

    Publication Year: 2007, Page(s): 7
    Cited by:  Papers (14)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (699 KB) | HTML iconHTML

    We consider the problem of autonomous navigation in unstructured outdoor terrains using vision sensors. The goal is for a robot to come into a new environment, map it and move to a given goal at modest speeds (1 m/sec). The biggest challenges are in building good maps and keeping the robot well localized as it advances towards the goal. In this paper, we concentrate on showing how it is possible t... View full abstract»

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  • Egomotion Estimation in Monocular Infra-red Image Sequence for Night Vision Applications

    Publication Year: 2007, Page(s): 8
    Cited by:  Papers (7)  |  Patents (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (968 KB) | HTML iconHTML

    This paper presents a real-time egomotion estimation scheme that is specifically designed for measuring vehicle motion from a monocular infra-red image sequence at night time. Conventional methods of estimating camera motion such as optical-flow based method or direct-method that depends on brightness constancy do not work well in relatively low resolution infra-red imagery due to lack of texturen... View full abstract»

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  • Pose Estimation Based on Two Images from Different Views

    Publication Year: 2007, Page(s): 9
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (387 KB) | HTML iconHTML

    In this paper, we propose a new approach for face pose estimation based on two images from different views under certain conditions. Using a weak-perspective imaging model, six pose parameters were deduced, with four pairs of feature points properly chosen across the two face images. Through the scan-iteration algorithm, a robust performance was achieved, without solving non-linear equations. Comp... View full abstract»

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  • A Drifting-proof Framework for Tracking and Online Appearance Learning

    Publication Year: 2007, Page(s): 10
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (293 KB) | HTML iconHTML

    In order to avoid the notorious drifting problem for tracking system, a new integrated appearance learning framework is proposed in this paper. Previous tracking frameworks with appearance learning ability (Black, et al., 1998) either require supervised offline training or will fail inevitably if the tracker locks on the background. While in our framework, no offline training is required. Given th... View full abstract»

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  • Interactive Image Repair with Assisted Structure and Texture Completion

    Publication Year: 2007, Page(s): 11
    Cited by:  Papers (2)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1010 KB) | HTML iconHTML

    Removing image defects in an undetectable manner has been studied for its many useful and varied applications. In many cases the desired result may be ambiguous from the image data alone and needs to be guided by a user's knowledge of the intended result. This paper presents a framework for interactively incorporating user guidance into the filling-in process, more effectively using user input to ... View full abstract»

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  • A Novel Algorithm for Estimating Vehicle Speed from Two Consecutive Images

    Publication Year: 2007, Page(s): 12
    Cited by:  Papers (7)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1739 KB) | HTML iconHTML

    In this paper, we present a new algorithm for estimating individual vehicle speed based on two consecutive images captured from a traffic safety camera system. Its principles are first, both images are transformed from the image plane to the 3D world coordinates based on the calibrated camera parameters. Second, the difference of the two transformed images is calculated, resulting in the backgroun... View full abstract»

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  • Stereo Matching and 3D Visualization for Gamma-Ray Cargo Inspection

    Publication Year: 2007, Page(s): 13
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1100 KB) | HTML iconHTML

    In this paper, stereo matching and 3D visualization issues are studied for a linear pushbroom stereo model built for 3D gamma-ray (or X-ray) cargo inspection. A fast and automated stereo matching algorithm based on free-form deformable registration is developed to obtain 3D measurements of the objects under inspection. For facilitate stereo matching, an adaptive window min-max method is used to en... View full abstract»

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  • Feature-based Part Retrieval for Interactive 3D Reassembly

    Publication Year: 2007, Page(s): 14
    Cited by:  Papers (6)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (246 KB) | HTML iconHTML

    We propose a novel framework for 3D reassembly, the task of assembling a solid object from its broken pieces. The primary challenge in this under-explored problem is to robustly establish compatibility between parts from one object. Feature-based techniques have shown success in domains such as 3D similarity search; unfortunately, the global features typically employed to quantify whole-object sim... View full abstract»

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  • Map-Enhanced UAV Image Sequence Registration

    Publication Year: 2007, Page(s): 15
    Cited by:  Papers (16)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2003 KB) | HTML iconHTML

    Registering consecutive images from an airborne sensor into a mosaic is an essential tool for image analysts. Strictly local methods tend to accumulate errors, resulting in distortion. We propose here to use a reference image (such as a high resolution map image) to overcome this limitation. In our approach, we register a frame in an image sequence to the map using both frame-to-frame registration... View full abstract»

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  • Video-based Metrology of Water Droplet Spreading on Nanostructured Surfaces

    Publication Year: 2007, Page(s): 16
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (425 KB) | HTML iconHTML

    Dynamic wettability of a nanostructured surface is an important property for many liquid-related applications of nanostructures. The dynamic wettability analysis is performed by measuring the evolution of the precursor (outer rim) contour of a water droplet as it spreads on a nanostructured surface. A video-based metrological system based on the snake active contour model which is capable of preci... View full abstract»

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  • Maneuvering Aid for Large Vehicle using Omnidirectional Cameras

    Publication Year: 2007, Page(s): 17
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (602 KB) | HTML iconHTML

    Maneuvering large vehicles like trucks is a challenging task because their drivers often cannot see the closest surrounding area of the vehicle. This paper presents a system providing the driver with a bird's-eye view of the surrounding area on a single display. This view is constructed by stitching together cutouts from two omnidirectional images acquired by catadioptric cameras, which are placed... View full abstract»

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  • A Fast and Accurate Tensor-based Optical Flow Algorithm Implemented in FPGA

    Publication Year: 2007, Page(s): 18
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (544 KB) | HTML iconHTML

    Many computer vision applications require real-time processing of image data. This requirement is especially critical for autonomous vehicles performing obstacle avoidance, path planning, and target tracking tasks. A quickly calculated and relatively rough motion estimate is more useful for autonomous navigation than a more accurate, but slowly calculated estimate. Recent technology advancements i... View full abstract»

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