title: Eccentricity error identification and compensation for high-accuracy 3D optical measurement.
abstract: The circular target has been widely used in various three-dimensional optical measurements, such as camera calibration, photogrammetry and structured light projection measurement system. The identification and compensation of the circular target systematic eccentricity error caused by perspective projection is an important issue for ensuring accurate measurement. This paper introduces a novel approach for identifying and correcting the eccentricity error with the help of a concentric circles target. Compared with previous eccentricity error correction methods, our approach does not require taking care of the geometric parameters of the measurement system regarding target and camera. Therefore, the proposed approach is very flexible in practical applications, and in particular, it is also applicable in the case of only one image with a single target available. The experimental results are presented to prove the efficiency and stability of the proposed approach for eccentricity error compensation.
authors.affiliation: Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, Shenzhen University, Shenzhen, Guangdong, 518060, People's Republic of China.
authors.forename: Dong
authors.initials: D
authors.lastname: He
authors.affiliation: Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, Shenzhen University, Shenzhen, Guangdong, 518060, People's Republic of China.
authors.forename: Xiaoli
authors.initials: X
authors.lastname: Liu
authors.affiliation: Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, Shenzhen University, Shenzhen, Guangdong, 518060, People's Republic of China; School of Mechanical Engineering, Tianjin University, Tianjin, 300072, People's Republic of China.
authors.forename: Xiang
authors.initials: X
authors.lastname: Peng
authors.affiliation: School of Mechanical Engineering, Tianjin University, Tianjin, 300072, People's Republic of China.
authors.forename: Yabin
authors.initials: Y
authors.lastname: Ding
authors.affiliation: Department of Bioengineering, COMSET, Clemson University, Clemson, SC 29634, USA.
authors.forename: Bruce Z
authors.initials: BZ
authors.lastname: Gao
keywords: camera calibration; concentric circles; digital image processing; industrial optical metrology; spatial ellipse center; vision inspection