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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 (13)
    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
  • Visual servoing for automatic and uncalibrated needle placement for percutaneous procedures

    Publication Year: 2000, Page(s):327 - 334 vol.2
    Cited by:  Papers (6)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1512 KB)

    This paper presents a new approach to image-based guidance of a needle or surgical tool during percutaneous procedures. The method is based on visual servoing. It requires no prior calibration or registration. The technique provides highly precise 3D-alignment of the tool with respect to an anatomic target. By taking advantage of projective geometry and projective invariants, this can be achieved ... View full abstract»

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  • A generalized optical flow constraint and its physical interpretation

    Publication Year: 2000, Page(s):487 - 492 vol.2
    Cited by:  Papers (19)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (264 KB)

    This paper addresses the issue of motion estimation on image sequences. The standard motion equation used to complete the apparent motion of image irradiance patterns is an invariance brightness based hypothesis called the optical flow constraint. Other equations can be used, in particular the extended optical flow constraint, which is a variant of the optical flow constraint, inspired by the flui... View full abstract»

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  • Maximum-likelihood template matching

    Publication Year: 2000, Page(s):52 - 57 vol.2
    Cited by:  Papers (21)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (392 KB)

    In image matching applications such as tracking and stereo matching, it is common to use the sum-of-squared-differences (SSD) measure to determine the best match for an image template. However, this measure is sensitive to outliers and is not robust to template variations. We describe a robust measure and efficient search strategy for template matching with a binary or greyscale template using a m... View full abstract»

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  • Estimation and prediction of evolving color distributions for skin segmentation under varying illumination

    Publication Year: 2000, Page(s):152 - 159 vol.2
    Cited by:  Papers (31)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2012 KB)

    A model approach for real time skin segmentation in video sequences is described. The approach enables reliable skin segmentation despite wide variation in illumination during tracking. An explicit second order Markov model is used to predict evolution of the skin color (HSV) histogram over time. Histograms are dynamically updated based on feedback from the current segmentation and based on predic... View full abstract»

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  • A comparative technique and performance results on novel learned snakes in two dissimilar medical domains

    Publication Year: 2000, Page(s):706 - 713 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (312 KB)

    We review our work on how to teach deformable models to maximize image segmentation correctness based on user-specified criteria. We then present new variants and applications of learned snakes, modeled by four different probability density functions (PDFs), at three scales, and in the two medical domains of abdominal CT slices and echocardiograms. We review and extend our method for evaluating wh... View full abstract»

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  • Integrated 3D scene flow and structure recovery from multiview image sequences

    Publication Year: 2000, Page(s):674 - 681 vol.2
    Cited by:  Papers (23)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (848 KB)

    Scene flow is the 3D motion field of points in the world. Given N (N>1) image sequences gathered with a N-eye stereo camera or N calibrated cameras, we present a novel system which integrates 3D scene flow and structure recovery in order to complement each other's performance. We do not assume rigidity of the scene motion, thus allowing for non-rigid motion in the scene. In our work, images are... 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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  • Towards reliable fusion of segmented surface descriptions

    Publication Year: 2000, Page(s):405 - 412 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (424 KB)

    This paper presents a novel solution for integrating range views into 3D geometry models. Unlike previous approaches, sparse surface and relation attributes are fused directly, without relying on the original range data or a dense mesh of data points. Corresponding surface patches in overlapping views are found and registered automatically. The main focus is on the integration of registered views.... View full abstract»

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  • Adaptive Bayesian recognition in tracking rigid objects

    Publication Year: 2000, Page(s):697 - 704 vol.2
    Cited by:  Papers (24)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (832 KB)

    We present a framework for tracking rigid objects based on an adaptive Bayesian recognition technique that incorporates dependencies between object features. At each frame we find a maximum a posteriori (MAP) estimate of the object parameters that include positioning and configuration of non-occluded features. This estimate may be rejected based on its quality. Our careful selection of data points... View full abstract»

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  • Reconstruction of scene models from sparse 3D structure

    Publication Year: 2000, Page(s):666 - 671 vol.2
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (364 KB)

    In this paper we present a geometric theory for reconstruction of surface models from sparse 3D data captured from N camera views which are consistent with the data visibility. Sparse 3D measurements of real scenes are readily estimated from image sequences using structure-from-motion techniques. Currently there is no general method for reconstruction of 3D models of arbitrary scenes from sparse d... View full abstract»

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  • Multiscale combination of physically-based registration and deformation modeling

    Publication Year: 2000, Page(s):422 - 429 vol.2
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (680 KB)

    In this paper we present a novel multiscale approach to recovery of nonrigid motion from sequences of registered intensity and range images. The main idea of our approach is that a finite element (FEM) model can naturally handle both registration and deformation modeling using a single model-driving strategy. The method includes a multiscale iterative algorithm based on analysis of the undirected ... View full abstract»

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  • Rectified catadioptric stereo sensors

    Publication Year: 2000, Page(s):380 - 387 vol.2
    Cited by:  Papers (16)
    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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  • 360×360 mosaics

    Publication Year: 2000, Page(s):388 - 395 vol.2
    Cited by:  Papers (21)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (728 KB)

    Current mosaicing methods use narrow field of view cameras to acquire image data. This poses problems when computing a complete spherical mosaic. First, a large number of images are needed to capture a sphere. Second, errors in mosaicing make it difficult to complete the spherical mosaic without seams. Third, with a hand-held camera it is hard for the user to ensure complete coverage of the sphere... 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 (60)  |  Patents (9)
    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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  • 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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  • 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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  • Multimodal speaker detection using error feedback dynamic Bayesian networks

    Publication Year: 2000, Page(s):34 - 41 vol.2
    Cited by:  Papers (21)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (308 KB)

    Design and development of novel human-computer interfaces poses a challenging problem: actions and intentions of users have to be inferred from sequences of noisy and ambiguous multi-sensory data such as video and sound. Temporal fusion of multiple sensors has been efficiently formulated using dynamic Bayesian networks (DBNs) which allows the power of statistical inference and learning to be combi... View full abstract»

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  • Detecting and tracking human face and eye using an space-varying sensor and an active vision head

    Publication Year: 2000, Page(s):168 - 173 vol.2
    Cited by:  Papers (8)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1000 KB)

    We have developed a system for detecting and tracking human face and eye in an unstructured environment. We adopt a biologically plausible retinally connected neural network architecture and integrate it with an active vision system. While the active vision system tracks the object moving in real time, the neural network detects the face and eye location from the video stream at a slower rate. The... View full abstract»

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  • Computing optical flow with physical models of brightness variation

    Publication Year: 2000, Page(s):760 - 767 vol.2
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (568 KB)

    This paper exploits physical models of time-varying brightness in image sequences to estimate optical flow and physical parameters of the scene. Previous approaches handled violations of brightness constancy with the use of robust statistics or with generalized brightness constancy constraints that allow generic types of contrast and illumination changes. We consider models of brightness variation... View full abstract»

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  • Statistical modeling and performance characterization of a real-time dual camera surveillance system

    Publication Year: 2000, Page(s):335 - 342 vol.2
    Cited by:  Papers (37)  |  Patents (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (620 KB)

    The engineering of computer vision systems that meet application specific computational and accuracy requirements is crucial to the deployment of real-life computer vision systems. This paper illustrates how past work on a systematic engineering methodology for vision systems performance characterization can be used to develop a real-time people detection and zooming system to meet given applicati... View full abstract»

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  • Inferring body pose without tracking body parts

    Publication Year: 2000, Page(s):721 - 727 vol.2
    Cited by:  Papers (51)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (216 KB)

    A novel approach for estimating articulated body posture and motion from monocular video sequences is proposed. Human pose is defined as the instantaneous two dimensional configuration (i.e. the projection onto the image plane) of a single articulated body in terms of the position of a predetermined sets of joints. First, statistical segmentation of the human bodies from the background is performe... View full abstract»

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  • Recovering non-rigid 3D shape from image streams

    Publication Year: 2000, Page(s):690 - 696 vol.2
    Cited by:  Papers (210)  |  Patents (38)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1104 KB)

    The paper addresses the problem of recovering 3D non-rigid shape models from image sequences. For example, given a video recording of a talking person, we would like to estimate a 3D model of the lips and the full face and its internal modes of variation. Many solutions that recover 3D shape from 2D image sequences have been proposed; these so-called structure-from-motion techniques usually assume... View full abstract»

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