Title :
Computer vision assisted virtual reality calibration
Author_Institution :
Jet Propulsion Lab., California Inst. of Technol., Pasadena, CA, USA
fDate :
6/1/1999 12:00:00 AM
Abstract :
A computer vision assisted semi-automatic virtual reality (VR) calibration technology has been developed that can accurately match a virtual environment of graphically simulated 3D models to the video images of the real task environment. We have developed a new 20-variable weighted least-squares algorithm that updates both camera and object models simultaneously for given two camera views of two mating objects. This simultaneous update enables accurate model matching even with rough, approximate initial camera calibrations. The developed semi-automatic VR calibration supports automated intermediate updates, eliminating nearly all operator interaction except for initial coarse matching. In our quasi-static supervisory telerobotic applications, intermediate VR calibrations are performed intermittently at a few robot stopping poses only, as a cost-effective and safer approach compared to real-time visual servoing. Extensive experimental results comparing alignment errors under various viewing conditions are presented
Keywords :
calibration; computer vision; pattern matching; real-time systems; solid modelling; telerobotics; virtual reality; 3D models; calibration; computer vision; least-squares; model matching; real-time systems; telerobotics; virtual reality; visual servoing; Calibration; Cameras; Computational modeling; Computer simulation; Computer vision; Robot vision systems; Robotics and automation; Telerobotics; Virtual environment; Virtual reality;
Journal_Title :
Robotics and Automation, IEEE Transactions on