Calibration of Digital Camera IOP Using Radial Alignment Constrain and Vanish Point Geometry
This paper presents our research on calibrating IOP of digital camera with mono-view. First, the Radial Alignment Constrain (RAC) from Tsais two-stage calibration is outlined and extended to handle with camera principle point parameters. Second, we relate principle point to other camera parameters by means of two vanishing points from the perspective projection of group lines, parallel to World Coordinate System X, Y axis, respectively, and with the relation, the function-dependence among parameters within the equation derived from extended RAC are eliminated. Third, based on the extended RAC, a new nonlinear equation for IOP calibration purpose is formulated and optimally solved with Least Square technique as well as initial value for parameters are determined. Finally, a set of stimulated images generated with virtual plane grid lines and known camera parameters are used for calibration experiment. The comparison of proposed approach with Tsais two-stage calibration is also given in this paper and valuable conclusions. are conducted as well.
Camera calibration Two-stage calibration Vanishing point RAC
Wu Jun Xu Gang Dong Zenglai Wang Jiejun
School of electronic engineering and automation, Guilin University of electronic technology,Guilin, 541004, P.R. China
国际会议
Third International Conference on Digital Image Processing(ICDIP 2011)(第三届数字图像处理国际会议)
成都
英文
469-474
2011-04-15（万方平台首次上网日期，不代表论文的发表时间）