Proceedings IEEE Conference on Computer Vision and Pattern Recognition. CVPR 2000 (Cat. No.PR00662)

15-15 June 2000

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  • Proceedings IEEE Conference on Computer Vision and Pattern Recognition. CVPR 2000 (Cat. No.PR00662)

    Publication Year: 2000
    Request permission for commercial reuse | PDF file iconPDF (660 KB)
    Freely Available from IEEE
  • Real-time 3D motion and structure of point features: a front-end system for vision-based control and interaction

    Publication Year: 2000, Page(s):778 - 779 vol.2
    Cited by:  Papers (17)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (230 KB)

    We present a system that consists of one camera connected to a personal computer that can (a) select and track a number of high-contrast point features on a sequence of images, (b) estimate their three-dimensional motion and position relative to an inertial reference frame, assuming rigidity, (c) handle occlusions that cause point-features to disappear as well as new features to appear. The system... View full abstract»

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  • Index of authors

    Publication Year: 2000, Page(s):799 - 804
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    Freely Available from IEEE
  • Reconstruction of a scene with multiple linearly moving objects

    Publication Year: 2000, Page(s):542 - 549 vol.2
    Cited by:  Papers (37)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (304 KB)

    We describe an algorithm for reconstructing a scene containing multiple moving objects. Given a monocular image sequence, we recover the scene structure, the trajectories of the moving objects and the camera motion simultaneously. The number of the moving objects is automatically detected without prior motion segmentation. Assuming that the objects are moving linearly with constant speeds, we prop... View full abstract»

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  • A novel approach to depth ordering in monocular image sequences

    Publication Year: 2000, Page(s):536 - 541 vol.2
    Cited by:  Papers (9)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (404 KB)

    Object oriented representation of image sequences requires accurate motion segmentation and depth ordering techniques. Unfortunately, the lack of precise motion estimates at the object boundaries makes these two tasks very difficult. We present a detailed analysis of the behaviour of dense motion estimation techniques at object boundaries which reveals the systematic nature of the motion estimatio... View full abstract»

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  • Reconstruction from six-point sequences

    Publication Year: 2000, Page(s):480 - 486 vol.2
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (196 KB)

    An algorithm is given for computing projective structure from a set of six points seen in a sequence of many images. The method is based on the notion of duality between cameras and points first pointed out by Carlsson and Weinshall. The current implementation avoids the weakness inherent in previous implementations of this method in which numerical accuracy is compromised by the distortion of ima... View full abstract»

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  • A fast and robust approach to recovering structure and motion from live video frames

    Publication Year: 2000, Page(s):528 - 535 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3436 KB)

    This paper describes a fast and robust approach to recovering structure and motion from video frames. It first describes a robust recursive factorization method for affine projection. Using the least median of squares (LMedS) criterion, the method estimates the dominant 3D affine motion and discards feature points regarded as outliers. The computational cost of the overall procedure is reduced by ... View full abstract»

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  • A linear algorithm for camera self-calibration, motion and structure recovery for multi-planar scenes from two perspective images

    Publication Year: 2000, Page(s):474 - 479 vol.2
    Cited by:  Papers (6)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (248 KB)

    In this paper we show that given two homography matrices for two planes in space, there is a linear algorithm for the rotation and translation between the two cameras, the focal lengths of the two cameras and the plane equations in the space. Using the estimates as an initial guess, we can further optimize the solution by minimizing the difference between observations and reprojections. Experiment... View full abstract»

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  • CueVideo: a system for cross-modal search and browse of video databases

    Publication Year: 2000, Page(s):786 - 787 vol.2
    Cited by:  Papers (4)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (152 KB)

    The detection and recognition of events is a challenging problem in video databases. It involves cross-linking and combining information available in multiple modalities such as audio, video and associated text metadata. CueVideo is a system designed for the discovery and recognition of specific events called topics of discussion through advanced video summarization and cross-modal indexing. It su... View full abstract»

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  • Surface landmark selection and matching in natural terrain

    Publication Year: 2000, Page(s):413 - 420 vol.2
    Cited by:  Papers (17)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1324 KB)

    In this paper we present an algorithm for robust absolute position estimation in natural terrain based on landmarks extracted from dense 3-D surfaces. Our landmarks are constructed by concatenating pose dependent oriented surface points with pose invariant surface signatures into a single feature vector; this definition of landmarks allows a priori pose information to be used to constrain the sear... View full abstract»

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  • View-independent recognition of hand postures

    Publication Year: 2000, Page(s):88 - 94 vol.2
    Cited by:  Papers (36)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (512 KB)

    Since the human hand is highly articulated and deformable, hand posture recognition is a challenging example in the research on view-independent object recognition. Due to the difficulties of the model-based approach, the appearance-based learning approach is promising to handle large variation in visual inputs. However, the generalization of many proposed supervised learning methods to this probl... View full abstract»

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  • Improved motion stereo matching based on a modified dynamic programming

    Publication Year: 2000, Page(s):501 - 505 vol.2
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (124 KB)

    A new method for computing precise depth map estimates of 3D shape of a moving object is proposed. 3D shape recovery in motion stereo is formulated as a matching optimization problem of multiple stereo images. The proposed method is a heuristic modification of dynamic programming applied to two-dimensional optimization problem. 3D shape recovery using real motion stereo images demonstrates a good ... View full abstract»

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  • Zebra-crossing detection for the partially sighted

    Publication Year: 2000, Page(s):211 - 217 vol.2
    Cited by:  Papers (38)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (500 KB)

    Zebra-crossings are useful road features for outdoor navigation in mobility aids for the partially sighted. In this paper, zebra-crossings are detected by looking for groups of concurrent lines, edges are then partitioned using intensity variation information. In order to tackle the ambiguity of the detection algorithm in distinguishing zebra-crossings and stair-cases, pose information is sought. ... View full abstract»

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  • Rectified catadioptric stereo sensors

    Publication Year: 2000, Page(s):380 - 387 vol.2
    Cited by:  Papers (17)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (320 KB)

    It has been previously shown how mirrors can be used to capture stereo images with a single camera, an approach termed catadioptric stereo. In this paper we present novel catadioptric sensors which use mirrors to produce rectified stereo images. The scan-line correspondence of these images benefits real-time stereo by avoiding the computational cost and image degradation due to resampling when rec... View full abstract»

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  • Image retrieval and segmentation based on color invariants

    Publication Year: 2000, Page(s):784 - 785 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (196 KB)

    We will demonstrate our CVPR2000 paper “Measurement of Color Invariants” for the cases of image retrieval based on query by example and for color image segmentation. Both are of importance in content based access of image and video data. We demonstrate the usefulness of the proposed color invariants in image retrieval by example systems. We show that an image retrieval query should inc... View full abstract»

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  • Wide area camera calibration using virtual calibration objects

    Publication Year: 2000, Page(s):520 - 527 vol.2
    Cited by:  Papers (19)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (508 KB)

    The paper introduces a method to calibrate a wide area system of unsynchronized cameras with respect to a single global coordinate system. The method is simple and does not require the physical construction of a large calibration object. The user need only wave an identifiable point in front of all cameras. The method generates a rough estimate of camera pose by first performing pair-wise structur... View full abstract»

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  • A geometric approach to blind deconvolution with application to shape from defocus

    Publication Year: 2000, Page(s):10 - 17 vol.2
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1032 KB)

    We propose a solution to the generic “bilinear calibration-estimation problem” when using a quadratic cost function and restricting to (locally) translation-invariant imaging models. We apply the solution to the problem of reconstructing the three-dimensional shape and radiance of a scene from a number of defocused images. Since the imaging process maps the continuum of three-dimension... View full abstract»

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  • Structure from motion without correspondence

    Publication Year: 2000, Page(s):557 - 564 vol.2
    Cited by:  Papers (66)  |  Patents (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (552 KB)

    A method is presented to recover 3D scene structure and camera motion from multiple images without the need for correspondence information. The problem is framed as finding the maximum likelihood structure and motion given only the 2D measurements, integrating over all possible assignments of 3D features to 2D measurements. This goal is achieved by means of an algorithm which iteratively refines a... View full abstract»

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  • A new algorithm for non-rigid point matching

    Publication Year: 2000, Page(s):44 - 51 vol.2
    Cited by:  Papers (61)  |  Patents (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1228 KB)

    We present a new robust point matching algorithm (RPM) that can jointly estimate the correspondence and non-rigid transformations between two point-sets that may be of different sizes. The algorithm utilizes the soft assign for the correspondence and the thin-plate spline for the non-rigid mapping. Embedded within a deterministic annealing framework, the algorithm can automatically reject a fracti... View full abstract»

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  • Dynamic layer representation with applications to tracking

    Publication Year: 2000, Page(s):134 - 141 vol.2
    Cited by:  Papers (20)  |  Patents (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (264 KB)

    A dynamic layer representation is proposed for tracking moving objects. Previous work on layered representations has largely concentrated on two-/multi-frame batch formulations, and tracking research has not addressed the issue of joint estimation of object motion ownership and appearance. The paper extends the estimation of layers in a dynamic scene to incremental estimation formulation and demon... View full abstract»

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  • Efficient matching of pictorial structures

    Publication Year: 2000, Page(s):66 - 73 vol.2
    Cited by:  Papers (112)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (228 KB)

    A pictorial structure is a collection of parts arranged in a deformable configuration. Each part is represented using a simple appearance model and the deformable configuration is represented by spring-like connections between pairs of parts. While pictorial structures were introduced a number of years ago, they have not been broadly applied to matching and recognition problems. This has been due ... View full abstract»

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  • Sensor networked mobile robotics

    Publication Year: 2000, Page(s):782 - 783 vol.2
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (288 KB)

    The dominant architecture for mobile robot perception uses sensors on-board the robot, providing a first-person perspective on the environment. We demonstrate a novel mobile robot architecture that uses an environment-based sensor network, which provides third-person perception. The idea is that a mobile robot working in the area tunes in to broadcasts from the video camera network (or in this cas... View full abstract»

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  • Detecting binocular half-occlusions: empirical comparisons of four approaches

    Publication Year: 2000, Page(s):466 - 473 vol.2
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1440 KB)

    Binocular half-occlusion points are those that are visible in one of the two views provided by a binocular imaging system. Due to their importance in binocular matching as well as subsequent interpretation tasks, a number of approaches have been developed for dealing with such points. In the current paper, we consider four methods that explicitly detect half-occlusions and report on a more uniform... View full abstract»

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  • Retinal thickness measurements in optical coherence tomography using a Markov boundary model

    Publication Year: 2000, Page(s):363 - 370 vol.2
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (428 KB)

    We present a highly accurate, robust system for measuring retinal thickness in optical coherence tomography (OCT) images. OCT is a relatively new imaging modality giving cross sectional images that are qualitatively similar to ultrasound but with 10 μm resolution. We begin with a 1-dimensional edge detection kernel to yield edge primitives, which are then selected, corrected, and grouped to for... View full abstract»

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  • Arbitrary view position and direction rendering for large-scale scenes

    Publication Year: 2000, Page(s):296 - 303 vol.2
    Cited by:  Papers (10)  |  Patents (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (808 KB)

    This paper presents a new method for rendering views, especially those of large-scale scenes, such as broad city landscapes. The main contribution of our method is that we are able to easily render any view from an arbitrary point to an arbitrary direction on the ground in a virtual environment. Our method belongs to the family of work that employs plenoptic functions; however, unlike other works ... View full abstract»

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