应用于结构光投影三维测量的二值时空编码方法  

Binary Spatiotemporal Encoded Method for Structured Light Projection of Three-Dimensional Measurement

作　　者：林海新[1] 吴庆阳(指导)[1] 黄锦辉[1] 贺威[1] 

机构地区：[1]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

出　　处：《中国激光》2013年第11期198-202,共5页Chinese Journal of Lasers

基　　金：国家自然科学基金仪器专项(61027014);国家自然科学基金青年项目(11109052);深圳大学应用技术开发项目(201151)

摘　　要：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。A binary spatiotemproal encoding method for structured light projection of three-dimensional measurement is proposed. Through the projection of three binary encoded fringe patterns, every discontinuities in the wrapped phase are encoded with the code values in the left and right sides of the stripe boundary. During measurement, according to the initial position of discontinuities, the gray values in the left and right sides of the discontinuities in the three encoded patterns can be got, and each discontinuities can obtain a binary code, after decoding the order of the discontinuities can be calculated, thereby the corresponding order of fringe pattern can be determined. According to the order of fringe pattern, the absolute phase can be got. The experimental results show that the encoded method effectively decreases the number of encoded patterns and improves the measurement speed under the premise of ensuring the measurement accuracy and reliability, and it is very suitable for high speed three-dimensional measurement system.

关 键 词：信号处理 三维传感 编码结构光 相位展开 时空编码 

分 类 号：TN247[电子电信—物理电子学]