动态三维轮廓测量中彩色编码条纹修正技术

Color Encoded Fringe Correction Techniques on Dynamic 3-D Shape Measurement

针对大部分三维测量方法无法进行动态测量这一问题,运用一种基于彩色编码条纹的光学投影方法,给出了理论分析、编码设计原理、修正方法与实验分析.对测量中红绿蓝(RGB)三通道颜色的串扰和正弦条纹的非线性,通过建立一个颜色补偿模型和对条纹图案进行非线性修正来改善测量系统本身对测量结果的影响,以补偿后的图像来指导彩色编码条纹的解码,从而完成整个三维测量过程.实验证明该修正方法对改善条纹的颜色耦合和非正弦性准确有效,使系统可以完成更好的解码效果.

To the problem that most of the three-dimensional measurement method can not be dynamically measured, the author uses the optical projection method based on a color-coded stripes. Meanwhile, the theoretical analysis, coding design principle, the correction method and experimental analysis are presented. For the red, green and blue colors disturb and nonlinear sinusoidal fringe, a compensation model is established to correct the color stripe pattern which improves the measurement results influenced by measurement system itself. The entire three-dimensional measuring process is completed with the decoding of the color-coded stripes guided by compensated image Experiments show that this correction method is accurate to improve the stripe color coupling and non-sinusoidal, and makes the system to accomplish better decoding results.