Abstract
In this study, I used a simulation to investigate the effect of the quantity and the position of correspondence points between 2D and 3D on the accuracy of camera calibration. The 3D points for simulation of the camera calibration were measured by a 3D laser scanner and were added variability (mean = 0 mm, SD = 10 mm). The 2D points for simulation of the camera calibration were calculated projecting the 3D points onto a 2D image with the camera parameters, and were added variability (mean = 0 pixel, SD = 0 ~ 4 pixel). In the case of the relatively accurate camera calibration (54 pair points, RMSE = 1.8), the simulation results showed that the camera calibration were stable with respect to the 2D points variability. And, the camera viewpoint error was estimated to be within 100 mm. In the case of the inaccurate camera calibration (36 pair points, RMSE = 2.7), the simulation results showed that the camera calibration were unstable with respect to 2D points variability. And, the camera viewpoint error was estimated to be 100mm or more. Therefore, by running the simulation after calibrating the camera, we were able to estimate the stability of calculation results and statistical evaluation of the camera parameters.
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