Journal ArticleDOI
A flexible new technique for camera calibration
Reads0
Chats0
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
More filters
Patent
Method and apparatus for automatic camera calibration using one or more images of a checkerboard pattern
TL;DR: In this article, a high precision method, model and apparatus for calibrating, determining the rotation of the lens scope around its symmetry axis, updating the projection model accordingly, and correcting the image radial distortion in real-time using parallel processing for best image quality.
Patent
Motion tracking for medical imaging
TL;DR: In this paper, a physiological signal is used to model the likely movement of an organ being imaged to control or adjust matching search patterns and limits, which is then combined with tracking based on medical data or other techniques.
Journal ArticleDOI
Fixation Precision in High-Speed Noncontact Eye-Gaze Tracking
TL;DR: Techniques for high-speed image processing that allow POG sampling rates of over 400 Hz are presented so that the fixation precision can be improved by filtering while maintaining an acceptable real-time latency.
Journal ArticleDOI
Rapid in-situ 3D measurement of shiny object based on fast and high dynamic range digital fringe projector
TL;DR: A fast and high dynamic range digital fringe projection technique is proposed to achieve fast and effective 3D measurement of shiny workpieces with dense point clouds and it improves the speed of 3D precise measurement of Shiny surface.
Journal ArticleDOI
Large depth-of-view portable three-dimensional laser scanner and its segmental calibration for robot vision
Jianfeng Li,Jianfeng Li,Yongkang Guo,Jianhua Zhu,Xiangdi Lin,Yao Xin,Kailiang Duan,Qing Tang +7 more
TL;DR: A novel segmental calibration approach, i.e., dividing the whole work range into two parts and calibrating, respectively, with corresponding system parameters, is proposed to effectively improve the measurement accuracy of the large depth-of-view 3D laser scanner.
References
More filters
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.