Results 221 to 230 of about 46,576 (257)
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Methods for geometrical video projector calibration
Machine Vision and Applications, 2011In this paper we present two methods to geometrically calibrate a video projector using a markerless planar surface. The first method assumes a partial knowledge on the camera parameters, whereas the second method consists in an auto-calibration method with no assumption on the parameters of the camera.
Jamil Draréni +2 more
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Copernicus SENTINEL-2 Geometric Calibration Status
2021 IEEE International Geoscience and Remote Sensing Symposium IGARSS, 2021The Sentinel-2 mission is a key element of the Copernicus Earth monitoring program of the European Union. The mission is currently composed of two satellites and provides a continuous observation of land and coastal areas at high spatial resolution and with a revisit time of 5 days at the equator.
Sébastien Clerc +8 more
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A Geometric Approach to Light field Calibration
1999Light field rendering allows fast visualization of complex scenes by view interpolation from images of densely spaced camera view-points. The light field data structure requires calibrated viewpoints, and rendering quality can be improved substantially when local scene depth is known for each viewpoint.
Reinhard Koch +4 more
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Camera calibration using geometric constraints
Proceedings CVPR '89: IEEE Computer Society Conference on Computer Vision and Pattern Recognition, 2003A method to estimate the intrinsic and extrinsic patterns of a camera model is presented. The intrinsic parameters of camera center and focal length are estimated with a calibration device which is adjusted iteratively with four independent motions.
Joseph K. Kearney +2 more
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A geometric solver for calibrated stereo egomotion
2011 International Conference on Computer Vision, 2011This paper introduces a novel geometrical solution for the pose estimation of a stereo camera system as commonly used in robotics, where the camera system balances between coverage and overlap. The proposed approach considers a set of features observed, respectively, in four, three and two views.
Enrique Dunn +2 more
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Optimization of geometrical calibration in pinhole SPECT
IEEE Transactions on Medical Imaging, 2005Previously, we developed a method to determine the acquisition geometry of a pinhole camera. This information is needed for the correct reconstruction of pinhole single photon emission computed tomography images. The method uses a calibration phantom consisting of three point sources and their positions in the field of view (FOV) influence the accuracy
Dirk Beque +3 more
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Perturbative Refinement of the Geometric Calibration in Pinhole SPECT
IEEE Transactions on Medical Imaging, 2008The paper investigates the geometric calibration of a rotating gamma camera for pinhole (PH) single photon emission computed tomography (SPECT) imaging. Most calibration methods previously applied in PH-SPECT assume that the motion of the camera around the object belongs to a well-defined class described by a small number of geometric parameters, for ...
Michel Defrise +2 more
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Catadioptric camera calibration using geometric invariants
Proceedings Ninth IEEE International Conference on Computer Vision, 2003Central catadioptric cameras are imaging devices that use mirrors to enhance the field of view while preserving a single effective viewpoint. In this paper, we propose a novel method for the calibration of central catadioptric cameras using geometric invariants.
Xianghua Ying, Zhanyi Hu
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Identification and calibration of the geometric parameters of robots
2006This paper presents a general method to identify the geometric parameters of serial robots. The robot location and the tool location parameters are taken into account. Experimental results are applied on a six degree of freedom robot of cylindrical type.
W. Khalid, J. L. Caenen, Ch. Enguehard
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Geometric Calibration of Robots with Flexible Joints and Links
Journal of Intelligent and Robotic Systems, 2002zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Wisama Khalil, Sébastien Besnard
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