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
Proceedings ArticleDOI
Camera calibration using spheres: a semi-definite programming approach
TL;DR: This paper presents a new algorithm to calibrate cameras using occluding contours of spheres, which is flexible, accurate and easy to use and can greatly simplify calibration of multiple cameras with a common field of view.
Journal ArticleDOI
Status, challenges, and future perspectives of fringe projection profilometry
Jing Xu,Song Zhang +1 more
TL;DR: The current status of FPP techniques, the major challenges still facing in the field, and the perspectives on the future of F PP techniques are presented.
Journal ArticleDOI
Hair photobooth: geometric and photometric acquisition of real hairstyles
Sylvain Paris,William S. C. Chang,Oleg I. Kozhushnyan,Wojciech Jarosz,Wojciech Matusik,Matthias Zwicker,Frédo Durand +6 more
TL;DR: A new reflectance interpolation technique is introduced that leverages an analytical reflectance model to alleviate cross-fading artifacts caused by linear methods and closely match the real hairstyles and can be used for animation.
Patent
Multi-tracker object tracking
TL;DR: In this paper, a system and approaches for tracking an object using multiple tracking processes is presented. But, the tracking process can be run in parallel to determine the position of the object by selecting the best performing tracker under certain heuristics or combining the results of multiple tracking process in various ways.
Patent
System and method for eye gaze tracking using corneal image mapping
TL;DR: In this paper, a system and method for eye gaze tracking without calibrated cameras, direct measurements of specific users' eye geometries, or requiring the user to visually track a cursor traversing a known trajectory is presented.
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.