This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.ĭata Availability: The authors confirm that all data underlying the findings are fully available without restriction. Received: ApAccepted: AugPublished: September 9, 2014Ĭopyright: © 2014 Sun et al. PLoS ONE 9(9):Įditor: Rongrong Ji, Xiamen University, China The experimental data show that the method has good repeatability and accuracy.Ĭitation: Sun Q, Hou Y, Tan Q, Li G (2014) A Flexible Calibration Method Using the Planar Target with a Square Pattern for Line Structured Light Vision System. Then a novel calibration method for structured light projector is presented by moving a planar target with a square pattern randomly, and the method mainly involves three steps: first, a simple linear model is proposed, by which the plane equation of the target at any orientations can be determined based on the square’s geometry information second, the pixel coordinates of the light stripe center on the target images are extracted as the control points finally, the points are projected into the camera coordinate frame with the help of the intrinsic parameters and the plane equations of the target, and the structured light plane can be determined by fitting these three-dimensional points. Firstly a camera model is established by transforming the points from the 2D image plane to the world coordinate frame, and the intrinsic parameters of camera can be obtained accurately. A flexible calibration approach for line structured light vision system is proposed in this paper.