GEOMETRIC CAMERY CALIBRATION - THE VIRTUAL CAMERA APPROACH

Accurate dimensional measurements made with TV cameras require a caref ul geometric calibration of the imaging device. This work presents a n ew calibration approach that makes use of the virtual camera paradigm, in which a calibrated surface (target) plays the role of the image pl ane of a distortionless, fictitious camera. The method yields a simple closed form solution for the calibration parameters. We use an error analysis to estimate the influence of the calibration set-up on the an gular measures. We use simulation to verify the analysis. The results of experimental tests are also reported, indicating good accuracy of t he proposed procedure compared to some of the best-known calibration m ethods.