Results 11 to 20 of about 296 (144)
Recursive Camera Autocalibration with the Kalman Filter [PDF]
2007 IEEE International Conference on Image Processing, 2007 Given a projective reconstruction of a 3D scene, we address the problem of recovering the Euclidean structure of the scene in a recursive way. This leads to the application of Kalman filtering to the problem of camera autocalibration and to new algorithms for the autocalibration of cameras with varying parameters. This has benefits in saving memory and
Guillermo Gallego 0002 +3 more
openaire +5 more sources
Line Geometry and Camera Autocalibration [PDF]
Journal of Mathematical Imaging and Vision, 2008 We provide a completely new rigorous matrix formulation of the absolute quadratic complex (AQC), given by the set of lines intersecting the absolute conic. The new results include closed-form expressions for the camera intrinsic parameters in terms of the AQC, an algorithm to obtain the dual absolute quadric from the AQC using straightforward matrix ...
José Ignacio Ronda +2 more
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The Absolute Line Quadric and Camera Autocalibration [PDF]
International Journal of Computer Vision, 2006 We introduce a geometrical object providing the same information as the absolute conic: the absolute line quadric (ALQ). After the introduction of the necessary exterior algebra and Grassmannian geometry tools, we analyze the Grassmannian of lines of P3 from both the projective and Euclidean points of view.
Antonio Valdés +2 more
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Experimental study on the sensitivity of autocalibration to projective camera model parameters
Optical Engineering, 2006 Existing methods of 3-D object modeling and recovering 3-D data from uncalibrated 2-D images are subject to errors introduced by assumptions about camera parameters and mismatches in finding point pairs in the images. In this study, we experimentally evaluate the effect of each of these assumptions together with the inaccuracy in the measurements in ...
Hassanpour, Reza, Atalay, Mehmet Volkan
core +5 more sources
Camera Calibration, Camera Autocalibration
, 2019 In this research seminar at the Escuela Politécnica Superior of the Universidad Autonoma de Madrid I will review the topics of camera calibration (providing an online demo) and autocalibration. I will provide an overview of the main steps of a standard structure-from-motion (SFM) pipeline and how camera calibration and camera auto-calibration fit into ...
Gallego Bonet, Guillermo
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Stratified Autocalibration of Cameras with Euclidean Image Plane [PDF]
Proceedings of the British Machine Vision Conference 2020, 2020 This paper tackles the problem of stratified autocalibration of a moving camera with Euclidean image plane (i.e. zero skew and unit aspect ratio) and constant intrinsic parameters. We show that with these assumptions, in addition to the polynomial derived from the so-called modulus constraint, each image pair provides a new quartic polynomial in the ...
Adlakha, Devesh +4 more
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An Efficient and Flexible Solution for Camera Autocalibration from N≥3 Views
Mathematical Problems in Engineering, Volume 2018, Issue 1, 2018., 2018 This paper presents an efficient and flexible solution for camera autocalibration from N≥3 views, given image correspondences and zero (or known) skew only. The knowledge is not required on camera motion, 3D information, scene, or internal constraints.
Rongfu Tang +4 more
wiley +2 more sources
Autocalibration of a camera pair [PDF]
, 2006 Given a pair of cameras with identical intrinsic parameters and known pixel shape, there exists a uniparametric set of possible 3D Euclidean reconstructions. We provide for this set a closed-form explicit parameterization. Therefore, given a single piece of data from the scene, the set of solutions can be efficiently ...
Ronda Prieto, José Ignacio +1 more
openaire +3 more sources
Linear camera autocalibration with varying parameters [PDF]
2004 International Conference on Image Processing, 2004. ICIP '04., 2005 We provide a new technique for the Euclidean upgrading of a projective calibration for a set of ten or more cameras with known skew angle and aspect ratio and arbitrary varying focal length and principal point. The proposed algorithm, which is purely linear and thus of very low computational cost and not suffering from initialization problems, is based
Valdés Morales, Antonio +2 more
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Boreal Headwater Catchment as Hot Spot of Carbon Processing From Headwater to Fjord
Journal of Geophysical Research: Biogeosciences, Volume 126, Issue 12, December 2021., 2021 Abstract Boreal headwaters and aquatic sediments are significant transporters, stores and processors of terrestrial carbon (C) as well as emitters of greenhouse gases (GHGs), mainly CO2 and CH4. While terrestrial ecosystems are net sinks of atmospheric C, lateral fluxes of total organic and dissolved inorganic C (TOC, DIC) as well as GHG release can ...
F. Clayer +4 more
wiley +1 more source