Results 1 - 10 of 202

Non-central Cameras for 3D Reconstruction

by Supervisor Václav Hlaváč, Hynek Bakstein, Hynek Bakstein , 2001
"... This thesis proposal deals with a 3D reconstruction from noncentral cameras. An introduction to the 3D reconstruction in general is given, together with the definition of non-central cameras and their comparison with central cameras. State-of-the-art in the field of the non-central cameras is pr ..."
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This thesis proposal deals with a 3D reconstruction from noncentral cameras. An introduction to the 3D reconstruction in general is given, together with the definition of non-central cameras and their comparison with central cameras. State-of-the-art in the field of the non-central cameras

Non-central cameras: A review

by Hynek Bakstein, Tomas Pajdla, Hynek Bakstein , 2000
"... this paper. It is shown that the relative orientation, the Epipolar geometry and the estimation of the focal length are constrained by a planar motion. ..."
Abstract - Cited by 2 (1 self) - Add to MetaCart
this paper. It is shown that the relative orientation, the Epipolar geometry and the estimation of the focal length are constrained by a planar motion.

Stereo with Oblique Cameras

by Tomas Pajdla , 2001
"... Mosaics acquired by pushbroom cameras, stereo panoramas, omnivergent mosaics, and spherical mosaics can be viewed as images taken by non-central cameras, i.e. cameras that project along rays that do not all intersect at one point. It has been shown that in order to reduce the correspondence search i ..."
Abstract - Cited by 58 (3 self) - Add to MetaCart
Mosaics acquired by pushbroom cameras, stereo panoramas, omnivergent mosaics, and spherical mosaics can be viewed as images taken by non-central cameras, i.e. cameras that project along rays that do not all intersect at one point. It has been shown that in order to reduce the correspondence search

Autocalibration & 3D Reconstruction with Non-central Catadioptric Cameras

by Branislav Micusik, Tomas Pajdla , 2004
"... We present a technique for modeling non-central catadioptric cameras consisting of perspective cameras and curved mirrors. The real catadioptric cameras have to be treated as non-central cameras, since they do not possess a single viewpoint. We present a method for solving the correspondence problem ..."
Abstract - Cited by 42 (1 self) - Add to MetaCart
We present a technique for modeling non-central catadioptric cameras consisting of perspective cameras and curved mirrors. The real catadioptric cameras have to be treated as non-central cameras, since they do not possess a single viewpoint. We present a method for solving the correspondence

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-central

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

Real-Time Tracking of Non-Rigid Objects using Mean Shift

by Dorin Comaniciu, Visvanathan Ramesh, Peter Meer - IEEE CVPR 2000 , 2000
"... A new method for real-time tracking of non-rigid objects seen from a moving camera isproposed. The central computational module is based on the mean shift iterations and nds the most probable target position in the current frame. The dissimilarity between the target model (its color distribution) an ..."
Abstract - Cited by 815 (19 self) - Add to MetaCart
A new method for real-time tracking of non-rigid objects seen from a moving camera isproposed. The central computational module is based on the mean shift iterations and nds the most probable target position in the current frame. The dissimilarity between the target model (its color distribution

Kernel-Based Object Tracking

by Dorin Comaniciu, Visvanathan Ramesh, Peter Meer , 2003
"... A new approach toward target representation and localization, the central component in visual tracking of non-rigid objects, is proposed. The feature histogram based target representations are regularized by spatial masking with an isotropic kernel. The masking induces spatially-smooth similarity fu ..."
Abstract - Cited by 900 (4 self) - Add to MetaCart
A new approach toward target representation and localization, the central component in visual tracking of non-rigid objects, is proposed. The feature histogram based target representations are regularized by spatial masking with an isotropic kernel. The masking induces spatially-smooth similarity

Analytical Forward Projection for Axial Non-Central Dioptric & Catadioptric Cameras

by Amit Agrawal, Yuichi Taguchi, Srikumar Ramalingam
"... Abstract. Wepresentatechniqueformodelingnon-centralcatadioptric cameras consisting of a perspective camera and a rotationally symmetric conic reflector. While previous approaches use a central approximation and/or iterative methods for forward projection, we present an analytical solution. This allo ..."
Abstract - Cited by 18 (8 self) - Add to MetaCart
the forward projection equation for imaging through a refractive sphere (non-central dioptric camera) and show that it is a 10 th degree equation. While central catadioptric cameras lead to conic epipolar curves, we show the existence of a quartic epipolar curve for catadioptric systems using a spherical

Multi-view geometry for general camera models

by Peter Sturm, Srikumar Ramalingam, Suresh Lodha - PROCEEDINGS OF THE 2005 IEEE COMPUTER SOCIETY CONFERENCE ON COMPUTER VISION AND PATTERN RECOGNITION (CVPR’05) - VOLUME 1 , 2005
"... We consider calibration and structure from motion tasks for a previously introduced, highly general imaging model, where cameras are modeled as possibly unconstrained sets of projection rays. This allows to describe most existing camera types (at least for those operating in the visible domain), in ..."
Abstract - Cited by 34 (4 self) - Add to MetaCart
), including pinhole cameras, sensors with radial or more general distortions, catadioptric cameras (central or non-central), etc. Generic algorithms for calibration and structure from motion tasks (pose and motion estimation and 3D point triangulation) are outlined. The foundation for a multi-view geometry
Results 1 - 10 of 202