Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, Hefei 230027, China.
Opt Lett. 2010 Mar 1;35(5):790-2. doi: 10.1364/OL.35.000790.
An algorithm based on the Fourier transform method without phase unwrapping is proposed to measure the 3D profile of objects. Phase unwrapping is essential and time consuming in conventional fringe projection techniques. To avoid this step, the method utilizes a color fringe pattern to substitute a gray-level fringe pattern. Intensity information can be used to extract the wrapped phase, while color information can be used to calculate the phase shift range. Combining the two parts, real phase value can be obtained without phase unwrapping. Experiments are conducted to verify the feasibility of this method.
提出了一种基于傅里叶变换方法的算法，无需相位展开即可测量物体的 3D 轮廓。相位展开在传统的条纹投影技术中是必不可少且耗时的。为了避免这一步骤，该方法利用彩色条纹图案代替灰度级条纹图案。强度信息可用于提取包裹相位，而颜色信息可用于计算相位移动范围。将这两部分结合起来，可以在不进行相位展开的情况下获得真实的相位值。实验验证了该方法的可行性。
