Journal ArticleDOI
A flexible new technique for camera calibration
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TLDR
A flexible technique to easily calibrate a camera that only requires the camera to observe a planar pattern shown at a few (at least two) different orientations is proposed and advances 3D computer vision one more step from laboratory environments to real world use.Abstract:
We propose a flexible technique to easily calibrate a camera. It only requires the camera to observe a planar pattern shown at a few (at least two) different orientations. Either the camera or the planar pattern can be freely moved. The motion need not be known. Radial lens distortion is modeled. The proposed procedure consists of a closed-form solution, followed by a nonlinear refinement based on the maximum likelihood criterion. Both computer simulation and real data have been used to test the proposed technique and very good results have been obtained. Compared with classical techniques which use expensive equipment such as two or three orthogonal planes, the proposed technique is easy to use and flexible. It advances 3D computer vision one more step from laboratory environments to real world use.read more
Citations
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Journal ArticleDOI
High-speed and high-efficiency three-dimensional shape measurement based on Gray-coded light
TL;DR: In this paper, a tripartite phase unwrapping method is proposed to avoid the jump errors on the boundary of code words, which are mainly caused by the defocusing of the projector and the motion of the tested object.
Patent
Information processing apparatus, information processing method, and program
TL;DR: In this paper, a geometrisches Merkmal des Zielobjekts in dem aufgenommenen Bild is verknupft, das durch zumindest eines der Vielzahl von Modellen bezeichnet wird, die with der groben Position und Orientierung platziert sind.
Proceedings ArticleDOI
Review on camera calibration
Wang Qi,Fu Li,Liu Zhenzhong +2 more
TL;DR: The widespread application of camera calibration in the robot navigation, the three-dimensional reconstruction, the bio-medical, the virtual reality and the visual surveillance is introduced.
Journal ArticleDOI
Large-scale multiview 3D hand pose dataset
TL;DR: In this article, a multiview hand pose dataset is presented, which provides hand color images and different kind of annotations for each sample, i.e. the bounding box and the 2D and 3D location on the joints in the hand.
Journal ArticleDOI
On-patient see-through augmented reality based on visual SLAM.
Nader Mahmoud,Oscar G. Grasa,Stéphane Nicolau,Christophe Doignon,Luc Soler,Jacques Marescaux,J. M. M. Montiel +6 more
TL;DR: The proposed augmented reality system can be smoothly integrated into the surgical workflow because it operates in real time, requires minimal additional hardware only a tablet-PC with camera, is robust to occlusion, and requires minimal interaction from the medical staff.
References
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Journal ArticleDOI
A versatile camera calibration technique for high-accuracy 3D machine vision metrology using off-the-shelf TV cameras and lenses
TL;DR: In this paper, a two-stage technique for 3D camera calibration using TV cameras and lenses is described, aimed at efficient computation of camera external position and orientation relative to object reference coordinate system as well as the effective focal length, radial lens distortion, and image scanning parameters.
Book
A versatile camera calibration technique for high-accuracy 3D machine vision metrology using off-the-shelf TV cameras and lenses
TL;DR: A new technique for three-dimensional camera calibration for machine vision metrology using off-the-shelf TV cameras and lenses using two-stage technique has advantage in terms of accuracy, speed, and versatility over existing state of the art.
Proceedings Article
Three-dimensional computer vision: a geometric viewpoint
TL;DR: Results from constrained optimization some results from algebraic geometry differential geometry are shown.