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Computer Vision and Pattern Recognition, 1999. IEEE Computer Society Conference on.

Date 23-25 June 1999

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  • Proceedings 1999 IEEE Computer Society Conference on Computer Vision and Pattern Recognition Vol. Two

    Publication Year: 1999, Page(s):i - xviii
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    Freely Available from IEEE
  • Visual tracking and control using Lie algebras

    Publication Year: 1999, Page(s):652 - 657 Vol. 2
    Cited by:  Papers (12)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (578 KB)

    A novel approach to visual servoing is presented, which takes advantage of the structure of the Lie algebra of affine transformations. The aim of this project is to use feedback from a visual sensor to guide a robot arm to a target position. The sensor is placed in the end effector of the robot, the 'camera-in-hand' approach, and thus provides direct feedback of the robot motion relative to the ta... View full abstract»

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  • Author index

    Publication Year: 1999, Page(s):660 - 663
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    Freely Available from IEEE
  • Perceptual organization of occluding contours generated by opaque surfaces

    Publication Year: 1999
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (624 KB)

    This paper offers computational theory and an algorithmic framework for perceptual organization of image contours arising from static occluding surfaces of constant lightness. We articulate constraints and biases underlying the inference of such physical events as visible surface overlap and invisible (modal and amodal) surface boundaries, from ambiguous visual evidence including visible contrast ... View full abstract»

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  • Efficient iterative solution to M-view projective reconstruction problem

    Publication Year: 1999
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (508 KB)

    We propose an efficient solution to the general M-view projective reconstruction problem, using matrix factorization and iterative least squares. The method can accept input with missing data, meaning that not all points are necessarily visible in all views. It runs much faster than the often-used non-linear minimization method, while preserving the accuracy of the latter. The key idea is to conve... View full abstract»

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  • A new Bayesian framework for object recognition

    Publication Year: 1999
    Cited by:  Papers (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (600 KB)

    We introduce an approach to feature-based object recognition, using maximum a posteriori (MAP) estimation under a Markov random field (MRF) model. This approach provides an efficienct solution for a wide class of priors that explicitly model dependencies between individual features of an object. These priors capture phenomena such as the fact that unmatched features due to partial occlusion are ge... View full abstract»

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  • Performance prediction and validation for object recognition

    Publication Year: 1999
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (568 KB)

    This paper addresses the problem of predicting fundamental performance of vote-based object recognition using 2-D point features. It presents a method for predicting a tight lower bound on performance. Unlike previous approaches, the proposed method considers data-distortion factors, namely uncertainty, occlusion, and clutter, in addition to model similarity, simultaneously. The similarity between... View full abstract»

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  • Harmonic maps and their applications in surface matching

    Publication Year: 1999
    Cited by:  Papers (33)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (656 KB)

    The surface-matching problem is investigated in this paper using a mathematical tool called harmonic maps. The theory of harmonic maps studies the mapping between different metric manifolds from the energy-minimization point of view. With the application of harmonic maps, a surface representation called harmonic shape images is generated to represent and match 3D freeform surfaces. The basic idea ... View full abstract»

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  • Robust hierarchical algorithm for constructing a mosaic from images of the curved human retina

    Publication Year: 1999
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (644 KB)

    This paper describes computer vision algorithms to assist in retinal laser surgery, which is widely used to treat leading blindness causing conditions but only has a 50% success rate, mostly due to a lack of spatial mapping and reckoning capabilities in current instruments. The novel technique described here automatically constructs a composite (mosaic) image of the retina from a sequence of incom... View full abstract»

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  • Deformable shape detection and description via model-based region grouping

    Publication Year: 1999
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (844 KB)

    A method for deformable shape detection and recognition is described. Deformable shape templates are used to partition the image into a globally consistent interpretation, determined in part by the minimum description length principle. Statistical shape models enforce the prior probabilities on global, parametric deformations for each object class. Once trained, the system autonomously segments de... View full abstract»

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  • User assisted modeling of buildings from aerial images

    Publication Year: 1999
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (944 KB)

    An approach that allows a user to assist an automatic system in modeling buildings is described. The approach is designed to be efficient in user time and effort while preserving the quality of the models created. Currently our system is able to handle the rectangular buildings with flat roof or symmetric gabled roof. Models can be created by only one or two clicks in many cases. Efficient editing... View full abstract»

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  • Joint detection for potsherds of broken earthenware

    Publication Year: 1999
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (444 KB)

    In this paper, we propose a new strategy for detecting the joint among two potsherds. Joint detection problems were studied in jigsaw puzzle assembling. However, the shape assumptions of a piece used in the past researches cannot be applied to joint detection to reconstruct broken earthenware. To detect the joint, the most similar section among two contours must be detected by partial verification... View full abstract»

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  • Minimal projective reconstruction with missing data

    Publication Year: 1999
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (472 KB)

    The minimal data necessary for projective reconstruction from point correspondences is well-known when the points are visible in all images. In this paper, we formulate and propose solutions to a new family of reconstruction problems from multiple images with minimal data, where there are missing points in some of the images. The ability to handle the minimal cases with missing data is of great th... View full abstract»

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  • Background estimation and removal based on range and color

    Publication Year: 1999
    Cited by:  Papers (36)  |  Patents (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (664 KB)

    Background estimation and removal based on the joint use of range and color data produces superior results than can be achieved with either data source alone. This is increasingly relevant as inexpensive, real-time, passive range systems become more accessible through novel hardware and increased CPU processing speeds. Range is a powerful signal for segmentation which is largely independent of col... View full abstract»

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  • Stochastic image segmentation by typical cuts

    Publication Year: 1999
    Cited by:  Papers (16)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (576 KB)

    We present a stochastic clustering algorithm which uses pairwise similarity of elements, based on a new graph theoretical algorithm for the sampling of cuts in graphs. The stochastic nature of our method makes it robust against noise, including accidental edges and small spurious clusters. We demonstrate the robustness and superiority of our method for image segmentation on a few synthetic example... View full abstract»

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  • Pose clustering with density estimation and structural constraints

    Publication Year: 1999
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (624 KB)

    This paper describes a statistical framework for object alignment by pose clustering. The idea underlying pose clustering is to transform the alignment process from the image domain to that of the appropriate transformation parameters. It commence by taking k-tuples from the primitive-sets for the model and the data. The size of the k-tuples is such that there are sufficient measurements available... View full abstract»

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  • Motion segmentation: a synergistic approach

    Publication Year: 1999
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (704 KB)

    Since estimation of camera motion requires knowledge of independent motion, and moving object detection and localization requires knowledge about the camera motion, the two problems of motion estimation and segmentation need to be solved together in a synergistic manner. This paper provides an approach to treating both these problems simultaneously. The technique introduced here is based on a nove... View full abstract»

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  • Spatial filter selection for illumination-invariant color texture discrimination

    Publication Year: 1999
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (700 KB)

    Color texture contains a large amount of spectral and spatial structure that can be exploited for recognition. Recent work has demonstrated that spatial filters offer a convenient means of extracting illumination invariant spatial information from a color image. In this paper, we address the problem of deriving optimal fillers for illumination-invariant color texture discrimination. Color textures... View full abstract»

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  • Geodesic active contours for supervised texture segmentation

    Publication Year: 1999
    Cited by:  Papers (17)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (824 KB)

    This paper presents a variational method for supervised texture segmentation which is based on ideas coming from the curve propagation theory. We assume that a preferable texture pattern is known (e.g., the pattern that we want to distinguish from the rest of the image). The textured feature space is generated by filtering the input and the preferable pattern image using Gabor filters, and analyzi... View full abstract»

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  • Time-series classification using mixed-state dynamic Bayesian networks

    Publication Year: 1999
    Cited by:  Papers (18)  |  Patents (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (460 KB)

    We present a novel mixed-state dynamic Bayesian network (DBN) framework for modeling and classifying time-series data such as object trajectories. A hidden Markov model (HMM) of discrete actions is coupled with a linear dynamical system (LDS) model of continuous trajectory motion. This combination allows us to model both the discrete and continuous causes of trajectories such as human gestures. Th... View full abstract»

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  • Shape from video

    Publication Year: 1999
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (528 KB)

    This paper presents a novel technique for recovering the shape of a static scene from a video sequence due to a rigidly moving camera. The solution procedure consists of two stages. In the first stage, the rigid motion of the camera at each instant in time is recovered. This provides the transformation between successive viewing positions. The solution is achieved through new constraints which rel... View full abstract»

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  • Robust visual servoing based on relative orientation

    Publication Year: 1999
    Cited by:  Papers (19)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (616 KB)

    In this paper the problem of controlling the spatial position and orientation of a robotic platform based on the image data obtained from a video camera mounted on that platform is considered. More specifically, we propose control laws that generate translational and angular velocities that will cause the robot to achieve and maintain a fixed position and orientation with respect to a set of featu... View full abstract»

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  • Folded catadioptric cameras

    Publication Year: 1999
    Cited by:  Papers (18)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (664 KB)

    A framework is developed for the design and analysis of single-viewpoint catadioptric cameras that use two or more mirrors. The use of multiple mirrors permits folding of the optics which leads to more compact camera designs than ones that use a single mirror. A dictionary of camera designs that use two conic mirrors is presented. We show that any folded system that uses conic mirrors has a geomet... View full abstract»

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  • Automatic differentiation facilitates OF-integration into steering-angle-based road vehicle tracking

    Publication Year: 1999
    Cited by:  Papers (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (624 KB)

    The interpretation of road traffic scenes recorded by a stationary video camera requires a sufficiently large field of view in order to capture non-trivial maneuvers. Vehicle images will thus be small. Their reliable tracking needs to combine edge-based approaches for precision with area-oriented approaches, for example based on a match between estimated and predicted Optic Flow fields, for stabil... View full abstract»

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  • 3D trajectory recovery for tracking multiple objects and trajectory guided recognition of actions

    Publication Year: 1999
    Cited by:  Papers (44)  |  Patents (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (748 KB)

    A mechanism is proposed that integrates low-level (image processing), mid-level (recursive 3D trajectory estimation), and high level (action recognition) processes. It is assumed that the system observes multiple moving objects via a single, uncalibrated video camera. A novel extended Kalman filter formulation is used in estimating the relative 3D motion trajectories up to a scale factor. The recu... View full abstract»

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