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首页> 外文会议>International conference on mechatronics technology >Simple and Flexible Calibration Method of a 3D Imaging System Based on Fringe Projection Technique
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Simple and Flexible Calibration Method of a 3D Imaging System Based on Fringe Projection Technique

机译：基于边缘投影技术的3D成像系统简单灵活的校准方法

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Phase calculation-based 3D imaging systems have been widely studied in academia and applied in industrial fields.A vital step of such 3D systems is calibration,which builds up the relationship between an absolute phase map and shape data.The existing calibration methods are complicated because of using a precise translating stage or a 3D gauge block.This paper presents a simple and flexible calibration method of phase calculation-based 3D imaging systems by using a checkerboard with known checker size and a white plate having discrete markers on the surface with known distance in between.Placing the checkerboard at several positions determines the internal parameters of the CCD camera of 3D imaging systems.The plate gives phase and depth data in the measuring volume to build up their relationship by a polynomial function at each pixel position.At each plate position,the absolute phase of each pixel can be calculated by projecting three fringe pattern sets with the optimum fringe numbers onto the plate surface.In the meanwhile,each marker position of the plate can be determined by an automatic extraction algorithm,so the relative depth of each pixel to a chosen reference plane can be obtained.Therefore,coefficient set of the polynomial function at each pixel are calculated by using the obtained multiple absolute phase and depth data.The X,Y coordinates and the pixel positions can be established by the parameters of the CCD camera and the calibrated depth data.Experimental results and performance evaluations show that the proposed calibration method can easily build up the relationship between absolute phase map and shape data in a simple and flexible way.
机译：相位计算为基础的3D成像系统已经被广泛的研究在学术界和在这样的3D系统的工业fields.A重要步骤是施加校正，其积聚的绝对相位图和形状data.The现有校准方法是复杂的，因为之间的关系使用精确的平移阶段或3D计block.This纸礼物通过使用棋盘已知棋盘格大小和具有该表面上的离散标记与已知距离的白色板的简单和相位基于计算-3D成像系统的灵活的校准方法的在几个位置between.Placing棋盘确定3D成像systems.The板的CCD照相机的内部参数给出相位和深度数据在测量空间由多项式函数在每个像素position.At每个板以建立它们之间的关系位置时，每个像素的绝对相位可以通过用最优的条纹数突出3点条纹图案集合来计算š到板surface.In同时，该板的各标记的位置可以通过一个自动提取算法来确定，以使得每个像素的选择的参考平面的相对深度可以obtained.Therefore，在系数组多项式函数的每个像素，通过使用所获得的多个绝对相位和深度data.The X，Y坐标和像素位置可以由CCD相机和校准深度data.Experimental结果和性能评价的参数来建立计算表明，所提出的校准方法可以很容易地建立以简单而灵活的方式绝对相位图与形状数据之间的关系。

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