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提出一种基于位错点阵投影的三维数字成像方法,该方法以二维点阵结构光顺序照明参考平面和被测物体表面,通过分析分别投影在参考平面和物体上的点阵的成像过程,建立投射在参考平面和被测物体表面上的点阵中同一点在成像面上横向位置错动与被测物体深度之间的数学模型。依据此模型,通过计算相对应点在成像平面上的横向位移,可计算出物体的深度图像。二维点阵可以在垂直于光轴的平面内做横向和纵向的两维移动,以填补由于离散而丢失的其他空间点的深度信息,获得高空间分辨率。实验验证了该方法的可行性,此方法对于拓扑复杂的表面和大梯度表面有较强的适应性。
A three-dimensional digital imaging method based on dislocation lattice projection is proposed. The method illuminates the reference plane and the surface of the measured object in order of two-dimensional lattice structure light. By analyzing the imaging process of the lattice projected on the reference plane and the object respectively, , A mathematical model is established between the misalignment of the horizontal position on the imaging plane and the depth of the measured object projected on the reference plane and the surface of the measured object. According to this model, the depth image of the object can be calculated by calculating the lateral displacement of the corresponding point in the imaging plane. The two-dimensional lattice can make horizontal and vertical two-dimensional movements in a plane perpendicular to the optical axis to fill the depth information of other space points lost due to the discretization to obtain high spatial resolution. The feasibility of this method is verified by experiments. This method has strong adaptability to complex surface and large gradient surface.