By Topic

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

Date 23-25 June 1999

Go

Filter Results

Displaying Results 1 - 25 of 99
  • Proceedings 1999 IEEE Computer Society Conference on Computer Vision and Pattern Recognition Vol. Two

    Publication Year: 1999 , Page(s): i - xviii
    Request Permissions | PDF file iconPDF (1376 KB)  
    Freely Available from IEEE
  • Visual tracking and control using Lie algebras

    Publication Year: 1999 , Page(s): 652 - 657 Vol. 2
    Cited by:  Papers (11)  |  Patents (1)
    Request Permissions | 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»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Author index

    Publication Year: 1999 , Page(s): 660 - 663
    Request Permissions | PDF file iconPDF (254 KB)  
    Freely Available from IEEE
  • Eigenshapes for 3D object recognition in range data

    Publication Year: 1999
    Cited by:  Papers (11)
    Request Permissions | Click to expandAbstract | PDF file iconPDF (516 KB)  

    Much of the recent research in object recognition has adopted an appearance-based scheme, wherein objects to be recognized are represented as a collection of prototypes in a multidimensional space spanned by a number of characteristic vectors (eigen-images) obtained from training views. In this paper, we extend the appearance-based recognition scheme to handle range (shape) data. The result of tra... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Efficient iterative solution to M-view projective reconstruction problem

    Publication Year: 1999
    Cited by:  Papers (9)
    Request Permissions | 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»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Reconstruction of linearly parameterized models from single images with a camera of unknown focal length

    Publication Year: 1999
    Request Permissions | Click to expandAbstract | PDF file iconPDF (660 KB)  

    This paper deals with the problem of recovering the dimensions of an object and its pose from a single image acquired with a camera of unknown focal length. It is assumed that the object in question can be modeled as a polyhedron where the coordinates of the vertices can be expressed as a linear function of a dimension vector, λ. The reconstruction program takes as input a set of correspond... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • FingerCode: a filterbank for fingerprint representation and matching

    Publication Year: 1999
    Cited by:  Papers (26)  |  Patents (2)
    Request Permissions | Click to expandAbstract | PDF file iconPDF (1012 KB)  

    With the identity fraud in our society reaching unprecedented proportions and with an increasing emphasis on the emerging automatic positive personal identification applications, biometrics-based identification, especially fingerprint-based identification, is receiving a lot of attention. There are two major shortcomings of the traditional approaches to fingerprint representation. For a significan... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Shape from video

    Publication Year: 1999
    Cited by:  Papers (5)
    Request Permissions | 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»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Vision-based speaker detection using Bayesian networks

    Publication Year: 1999
    Cited by:  Papers (17)
    Request Permissions | Click to expandAbstract | PDF file iconPDF (568 KB)  

    The development of user interfaces based on vision and speech requires the solution of a challenging statistical inference problem: The intentions and actions of multiple individuals must be inferred from noisy and ambiguous data. We argue that Bayesian network models are an attractive statistical framework for cue fusion in these applications. Bayes nets combine a natural mechanism for expressing... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • On the intrinsic reconstruction of shape from its symmetries

    Publication Year: 1999
    Cited by:  Papers (7)
    Request Permissions | Click to expandAbstract | PDF file iconPDF (460 KB)  

    We address the issue of the use of symmetry-based representations, such as the medial axis and an augmented form of it, the shock structure, to regenerate shapes. First, we address pointwise reconstruction of the boundary from points of the medial axis. As classified into three generic types (A2/1 mid-branch, A3 end point of a branch, and A13 junction).... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Background estimation and removal based on range and color

    Publication Year: 1999
    Cited by:  Papers (32)  |  Patents (7)
    Request Permissions | 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»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Multiscale image registration using scale trace correlation

    Publication Year: 1999
    Cited by:  Papers (5)
    Request Permissions | Click to expandAbstract | PDF file iconPDF (796 KB)  

    This paper presents a method for registering images at different magnifications (scales) by treating the problem not only as one of scaling the image coordinates but also as one inherently involving multiresolution information. While some existing methods for multiresolution registration do consider the way the resolution (scale) affects the image, they often consider the image one scale at a time... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Exploiting the dependencies in information fusion

    Publication Year: 1999
    Cited by:  Papers (5)
    Request Permissions | Click to expandAbstract | PDF file iconPDF (492 KB)  

    This paper presents a novel approach for multisensory information fusion in the Bayesian inference framework. Specifically, under the maximum entropy principle, a formula is derived for estimating the joint probabilities of multisensory signals. The formula uses appropriate mapping functions to reflect the dependencies among multisensory signals. Selection of the mappings is guided by the maximum ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Using the CONDENSATION algorithm for robust, vision-based mobile robot localization

    Publication Year: 1999
    Cited by:  Papers (50)
    Request Permissions | Click to expandAbstract | PDF file iconPDF (872 KB)  

    To navigate reliably in indoor environments, a mobile robot must know where it is. This includes both the ability of globally localizing the robot from scratch, as well as tracking the robot's position once its location is known. Vision has long been advertised as providing a solution to these problems, but we still lack efficient solutions in unmodified environments. Many existing approaches requ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Combining information using hard constraints

    Publication Year: 1999
    Cited by:  Papers (3)
    Request Permissions | Click to expandAbstract | PDF file iconPDF (768 KB)  

    In this paper we show how the use of hard constraints in solving estimation problems, by allowing multiple sources of information to be taken into account during optimization, increases robustness and improves efficiency over alternative methods such as the statistical combination of separate optimization results. Our argument is based on an empirical evaluation of the technique which uses a model... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Pose clustering with density estimation and structural constraints

    Publication Year: 1999
    Cited by:  Patents (1)
    Request Permissions | 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»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • 3D trajectory recovery for tracking multiple objects and trajectory guided recognition of actions

    Publication Year: 1999
    Cited by:  Papers (38)  |  Patents (8)
    Request Permissions | 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»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Adaptive background mixture models for real-time tracking

    Publication Year: 1999
    Cited by:  Papers (1432)  |  Patents (131)
    Request Permissions | Click to expandAbstract | PDF file iconPDF (812 KB)  

    A common method for real-time segmentation of moving regions in image sequences involves “background subtraction“, or thresholding the error between an estimate of the image without moving objects and the current image. The numerous approaches to this problem differ in the type of background model used and the procedure used to update the model. This paper discusses modeling each pixel... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Shape reconstruction in projective grid space from large number of images

    Publication Year: 1999
    Cited by:  Papers (21)  |  Patents (3)
    Request Permissions | Click to expandAbstract | PDF file iconPDF (540 KB)  

    This paper proposes a new scheme for multi-image projective reconstruction based on a projective grid space. The projective grid space is defined by two basis views and the fundamental matrix relating these views. Given fundamental matrices relating other views to each of the two basis views, this projective grid space can be related to any view. In the projective grid space as a general space tha... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Subset selection for active object recognition

    Publication Year: 1999
    Cited by:  Papers (10)
    Request Permissions | Click to expandAbstract | PDF file iconPDF (600 KB)  

    This paper presents an algorithm for constructing object representations suitable for recognition. The system automatically selects a representative subset of the views of the object while constructing the eigenspace basis. These views are actively located for object identification and pose determination. All processing is performed on-line. The camera is actively positioned during both representa... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Robust visual servoing based on relative orientation

    Publication Year: 1999
    Cited by:  Papers (16)
    Request Permissions | 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»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Trajectory triangulation of lines: reconstruction of a 3D point moving along a line from a monocular image sequence

    Publication Year: 1999
    Cited by:  Papers (7)
    Request Permissions | Click to expandAbstract | PDF file iconPDF (592 KB)  

    We consider the problem of reconstructing the location of a moving 3D point seen from a monocular moving camera, i.e., to reconstruct moving objects from line-of-sight measurements only. Since the point is moving while the camera is moving, then even if the camera motion is known, it is impossible to reconstruct the 3D location of the point under general circumstances. However we show that if the ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Panoramic EPI generation and analysis of video from a moving platform with vibration

    Publication Year: 1999
    Cited by:  Papers (5)  |  Patents (3)
    Request Permissions | Click to expandAbstract | PDF file iconPDF (948 KB)  

    This paper presents a novel approach for generating and analyzing epipolar plane images (EPIs) from video sequences taken from a moving platform subject to vibration so that the 3D model of an arbitrary scene can be constructed. Two problems are solved in our approach: (1) how to generate EPIs from video under a more general motion than a pure translation; (2) how to analyze the huge amount of dat... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • The customized-queries approach to CBIR using EM

    Publication Year: 1999
    Cited by:  Papers (5)  |  Patents (1)
    Request Permissions | Click to expandAbstract | PDF file iconPDF (648 KB)  

    This paper makes two contributions. The first contribution is an approach called the “customized-queries” approach (CQA) to content-based image retrieval. The second is an algorithm called FSSEM that performs feature selection and clustering simultaneously. The customized queries approach first classifies a query using the features that best differentiate the major classes and then cus... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Non-metric calibration of wide-angle lenses and polycameras

    Publication Year: 1999
    Cited by:  Papers (1)
    Request Permissions | Click to expandAbstract | PDF file iconPDF (808 KB)  

    Images taken with wide-angle cameras tend to have severe distortions which pull points towards the optical center. This paper proposes a method for recovering the distortion parameters without the use of any calibration objects. The distortions cause straight lines in the scene to appear as curves in the image. Our algorithm seeks to find the distortion parameters that would map the image curves t... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.