论文标题
基于灰色编码光的高速和高效三维形状测量
High-speed and high-efficiency three-dimensional shape measurement based on Gray-coded light
论文作者
论文摘要
边缘投影的轮廓学已越来越多地在动态三维（3D）形状测量中应用。在这项工作中，提出了基于灰代码光的强大和高效率3D测量。与传统方法不同，提出了一种新颖的三方相位拆开方法，以避免代码单词边界上的跳跃错误，这主要是由投影仪的散落和测试对象的运动引起的。随后，提出了重叠的编码策略，以极大地提高编码效率，从而减少每个组的预计数字，例如一个恢复的3D帧，从7（3 + 4）到4（3 + 1）。提出的两种技术的组合允许使用每4个投影模式重建具有强噪声的动态场景的像素和明确的3D几何形状。提出的技术保持了基于灰色编码的方法的高反噪声能力，同时克服了跳跃错误和低编码效率的缺点。实验表明，所提出的方法可以实现甚至通过强噪声污染的高速动态场景的强大和高效率3D形状测量。
Fringe projection profilometry has been increasingly sought and applied in dynamic three-dimensional (3D) shape measurement. In this work, a robust and high-efficiency 3D measurement based on Gray-code light is proposed. Unlike the traditional method, a novel tripartite phase unwrapping method is proposed to avoid the jump errors on the boundary of code words, which are mainly caused by the defocusing of the projector and the motion of the tested object. Subsequently, the time-overlapping coding strategy is presented to greatly increase the coding efficiency, decreasing the projected number in each group, e.g. from 7 (3 + 4) to 4 (3 + 1) for one restored 3D frame. Combination of two proposed techniques allows to reconstruct a pixel-wise and unambiguous 3D geometry of dynamic scenes with strong noise using every 4 projected patterns. The presented techniques preserve the high anti-noise ability of Gray-coded-based method while overcoming the drawbacks of jump errors and low coding efficiency. Experiments have demonstrated that the proposed method can achieve the robust and high-efficiency 3D shape measurement of high-speed dynamic scenes even polluted by strong noise.
