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为了解决物体表面存在不连续或大梯度的三维数字化问题,提出了一种结合点阵编码和条纹编码两种方式的复合编码三维数字成像方法。该方法综合了点阵编码和条纹编码两种编码方式的优点,利用点阵编码三维数字成像绝对测量的特点,以点阵编码获取物体较低分辨率的三维深度像,并以此确定条纹级次,控制条纹解码的相位展开过程。建立了基于这种复合编码方法的三维数字成像理论模型,并通过实验验证了该方法可有效地克服相位模糊和误差传播问题,同时该方法的物体深度测试范围和测试对象范围均大于单一编码方式。
In order to solve the problem of discontinuity or large-scale three-dimensional digitization on the surface of an object, a three-dimensional composite digital imaging method combining dot-matrix coding with fringe coding is proposed. The method combines the advantages of two encoding methods: dot matrix encoding and fringe encoding. By using the characteristics of absolute measurement of 3D digital imaging of dot matrix encoding, three-dimensional depth images of objects with lower resolution are obtained by lattice coding, Times, control the phase of stripe decoding process. The three-dimensional digital imaging theory model based on this composite coding method is established. The experimental results show that this method can effectively overcome the problem of phase ambiguity and error propagation. Meanwhile, the depth and the object range of the method are both greater than the single coding method .