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
Calibration of stereo-digital image correlation for deformation measurement of large engineering components
TL;DR: In this paper, a speckle-based calibration method is developed to calibrate the stereo-DIC system when the system is applied for deformation measurement of large engineering components.
Journal ArticleDOI
Stereoscopic First Person View System for Drone Navigation
TL;DR: This work proposes to upgrade on-boad teleoperation systems to a fully immersive setup that provides operators with a stereoscopic First Person View through a Virtual Reality (VR) Head Mounted Display (HMD).
Patent
Mixed Media Reality Brokerage Network With Layout-Independent Recognition
TL;DR: A Mixed Media Reality (MMR) system associated techniques are disclosed in this paper, which provides mechanisms for forming a mixed media document that includes media of at least two types (e.g., printed paper as a first medium and digital content as a second medium).
Patent
Architecture for mixed media reality retrieval of locations and registration of images
Hidenobu Kishi,Sadao Takahashi,Takahiro Furukawa,Berna Erol,Jonathan J. Hull,Jorge Moraleda,Jamey Graham +6 more
TL;DR: In this paper, a plurality of mobile devices, an MMR gateway, an image matching unit and an MMR publisher, send retrieval requests including image queries and other contextual information to the MMR gateway.
Patent
Ground truth estimation for autonomous navigation
TL;DR: In this paper, a system and method for ground truth estimation of an autonomous navigation system is described, which includes calibrating a ground-truth estimation system by determining a calibration pose of the navigator as disposed in relation to each of a plurality of landmarks during a calibration period.
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.