Author Affiliations
Abstract
Shenzhen Key Laboratory of Micro-Nano Photonic Information Technology, College of Electronic Science and Technology, Shenzhen University, Shenzhen 518060, China
Because the bottom of the cavity has the shadow and occlusion, the angle between the projection system and imaging system is limited. So the traditional fringe projection technique based on the principle of optical triangulation is inapplicable. This Letter presents a 3D shape measurement method of using the light tube for the cavity. The method can measure an object from two opposite views at the same time, which means it will obtain two different groups of 3D data for the same object in a single measurement. The experimental results show the feasibility and validity of the 3D shape measurement method.
110.6880 Three-dimensional image acquisition 120.5050 Phase measurement 150.1488 Calibration Chinese Optics Letters
2016, 14(1): 010010
深圳大学电子科学与技术学院, 深圳市微纳光子信息技术重点实验室, 广东 深圳 518060
提出了一种应用于结构光投影三维测量的二值时空编码方法。通过投影3幅二值编码条纹图，利用条纹边界左右两侧的编码值对截断相位图中的截断线进行编码。测量时，根据截断线提供的初始位置，在3幅编码图中读取其左右两侧的黑白编码值，从而每根截断线可以得到一个二进制码，解码后可以计算出该截断线的级次，从而确定其对应正弦条纹的级次。根据该级次对截断相位图进行展开得到绝对相位图。实验结果表明，该编码方法在保证测量精度和可靠性的前提下，有效减少了编码的幅数，提升了测量的速度，非常适用于高速三维测量系统。
信号处理 三维传感 编码结构光 相位展开 时空编码 中国激光
2013, 40(11): 1108002
