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Towards complete generic camera calibration

by Srikumar Ramalingam, Peter Sturm, Suresh K. Lodha - In CVPR , 2005
"... We consider the problem of calibrating a highly generic imaging model, that consists of a non-parametric association of a projection ray in 3D to every pixel in an image. Previous calibration approaches for this model do not seem to be directly applicable for cameras with large fields of view and no ..."
Abstract - Cited by 28 (7 self) - Add to MetaCart
and non-central cameras. In this paper, we describe a complete calibration approach that should in principle be able to handle any camera that can be described by the generic imaging model. Initial calibration is performed using multiple images of overlapping calibration grids simultaneously

Towards generic self-calibration of central cameras

by Srikumar Ramalingam, Peter Sturm, Suresh K. Lodha - In proc. ICCV workshop on Omnidirectional Vision, Camera Networks and Nonclassical cameras (OMNIVIS , 2005
"... We consider the self-calibration problem for the generic imaging model that assigns projection rays to pixels without a parametric mapping. In this paper, we consider the central variant of this model, which encompasses all camera models with a single effective viewpoint. Self-calibration refers to ..."
Abstract - Cited by 14 (3 self) - Add to MetaCart
to calibrating a camera’s projection rays, purely from matches between images, i.e. without knowledge about the scene such as using a calibration grid. This paper presents our first steps towards generic self-calibration; we consider specific camera motions, concretely, pure translations and rotations, although

Generic calibration of axial cameras

by Srikumar Ramalingam, Peter Sturm, Suresh K. Lodha - INRIA Research Report , 2005
"... Abstract. Although most works in computer vision use perspective or other central cameras, the interest in non-central camera models has increased lately, especially with respect to omnidirectional vision. Calibration and structure-from-motion algorithms exist for both, central and non-central camer ..."
Abstract - Cited by 4 (0 self) - Add to MetaCart
Abstract. Although most works in computer vision use perspective or other central cameras, the interest in non-central camera models has increased lately, especially with respect to omnidirectional vision. Calibration and structure-from-motion algorithms exist for both, central and non

Camera Self-Calibration: Geometry and Algorithms

by Yi Ma, René Vidal, Jana Kosecká, Shankar Sastry - UC Berkeley Memorandum No. UCB/ERL , 1999
"... In this paper, a geometric theory of camera self-calibration is developed. The problem of camera self-calibration is shown to be equivalent to the problem of recovering an unknown (Riemannian) metric of an appropriate space. This observation leads to a new account of the necessary and sufficient con ..."
Abstract - Cited by 3 (3 self) - Add to MetaCart
condition for a unique calibration. Based on this understanding, we obtain a new and complete critical motion analysis without introducing a projective space. A complete list of geometric invariants associated to an uncalibrated camera is given. Due to a new characterization of fundamental matrices

1Towards Generic Calibration

by Peter S Blockley, James G Rathmell
"... Abstract — The large number of calibrations and user requirements make it difficult to implement calibration firmware to meet the requirements of every application. This paper presents a customizable calibration which moves towards adding increased flexibly to instrument calibration firmware. I. ..."
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Abstract — The large number of calibrations and user requirements make it difficult to implement calibration firmware to meet the requirements of every application. This paper presents a customizable calibration which moves towards adding increased flexibly to instrument calibration firmware. I.

Complete Calibration of a Multi-camera Network

by Patrick Baker, et al. , 2000
"... We describe a calibration procedure for a multi-camera rig. Consider a large number of synchronized cameras arranged in some space, for example, on the walls of a room looking inwards. It is not necessary for all the cameras to have a common field of view, as long as every camera is connected to eve ..."
Abstract - Cited by 33 (2 self) - Add to MetaCart
We describe a calibration procedure for a multi-camera rig. Consider a large number of synchronized cameras arranged in some space, for example, on the walls of a room looking inwards. It is not necessary for all the cameras to have a common field of view, as long as every camera is connected

A generic camera model and calibration method for conventional, wide-angle, and fish-eye lenses

by Juho Kannala, Sami S. Brandt - IEEE TRANS. PATTERN ANALYSIS AND MACHINE INTELLIGENCE , 2006
"... Fish-eye lenses are convenient in such applications where a very wide angle of view is needed but their use for measurement purposes has been limited by the lack of an accurate, generic, and easy-to-use calibration procedure. We hence propose a generic camera model, which is suitable for fish-eye le ..."
Abstract - Cited by 72 (2 self) - Add to MetaCart
Fish-eye lenses are convenient in such applications where a very wide angle of view is needed but their use for measurement purposes has been limited by the lack of an accurate, generic, and easy-to-use calibration procedure. We hence propose a generic camera model, which is suitable for fish

Tracking across multiple cameras with disjoint views

by Omar Javed, Zeeshan Rasheed, Khurram Shafique, Mubarak Shah - In IEEE International Conference on Computer Vision , 2003
"... Conventional tracking approaches assume proximity in space, time and appearance of objects in successive observations. However, observations of objects are often widely separated in time and space when viewed from multiple non-overlapping cameras. To address this problem, we present a novel approach ..."
Abstract - Cited by 121 (5 self) - Add to MetaCart
system does not require any inter-camera calibration, instead the system learns the camera topology and path probabilities of objects using Parzen windows, during a training phase. Once the training is complete, correspondences are assigned using the maximum a posteriori (MAP) estimation framework

Camera network calibration from dynamic silhouettes

by Sudipta N. Sinha, Marc Pollefeys, Leonard Mcmillan - in CVPR , 2004
"... In this paper we present an automatic method for calibrating a network of cameras from only silhouettes. This is particularly useful for shape-from-silhouette or visual-hull systems, as no additional data is needed for calibration. The key novel contribution of this work is an algorithm to robustly ..."
Abstract - Cited by 63 (6 self) - Add to MetaCart
compute the epipolar geometry from dynamic silhouettes. We use the fundamental matrices computed by this method to determine the projective reconstruction of the complete camera configuration. This is refined into a metric reconstruction using self-calibration. We validate our approach by calibrating a

CALIBRATION AND EPIPOLAR GEOMETRY OF GENERIC HETEROGENOUS CAMERA SYSTEMS

by Andreas Luber, Dominik Rueß, Kristian Manthey, Ralf Reulke
"... The application of perspective camera systems in photogrammetry and computer vision is state of the art. In recent years non-perspective and especially omnidirectional camera systems were increasingly used in close-range photogrammetry tasks. In general perspective camera model, i. e. pinhole model, ..."
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parameters is conducted using a generic method that is independent of the particular camera system. The accuracy of this generic camera calibration approach is evaluated by calibration of a dozen of real camera systems. It will be shown, that a unified method of modeling, parameter approximation
Results 1 - 10 of 1,228