title: Flexible geometrical calibration for fringe-reflection 3D measurement.
abstract: System geometrical calibration is a challenging task in fringe-reflection 3D measurement because the fringe displayed on the LCD screen does not lie within the camera's field of view. Commonly, a flat mirror with markers can accomplish system geometrical calibration. However, the position of the markers must be precisely located by photogrammetry in advance. In this Letter, we introduce a calibration method by use of a markerless flat mirror. Experiments in phase measuring deflectometry demonstrate that the proposed method is simple and flexible.
authors.affiliation: Department of Opto-Electronics Science and Technology, Sichuan University, Chengdu, China.
authors.forename: Yong-Liang
authors.initials: YL
authors.lastname: Xiao
authors.forename: Xianyu
authors.initials: X
authors.lastname: Su
authors.forename: Wenjing
authors.initials: W
authors.lastname: Chen