面向高反物体的区域映射自适应条纹投影方法

Adaptive fringe projection algorithm based on region mapping for high-reflectivity surfaces

对于具有高反射率表面物体的测量,传统条纹投影方法无法测量出完整的三维信息。为了解决这一问题,采用了区域映射条纹投影方法(RMAFP),通过图像灰度值区分饱和区域,再采用改进的相移算法,得到饱和区域的相位与饱和度;相位值实现投影区域映射,再投影根据饱和度修正的标准条纹图,对原饱和区域重新测量,即可消除饱和现象,结合原非饱和区域像素的高精度相位,就能完成对高反物体的准确测量。实验过程仅需两轮投影即可实现,实验结果显示高反点的测量准确率为98%,同时对所有高反点均能得到较为准确的测量结果,表明该方法切实可行,可以完整地对复杂高反射率表面进行测量。

For the measurement of objects with highly reflective surfaces,the traditional fringe projection method cannot measure the complete 3D information.In order to solve this problem,this paper adopts the region mapping adaptive fringe projection method(RMAFP),which distinguishes the saturated region by the grey value of the image,and then adopts the improved phase-shift algorithm to get the phase and saturation of the saturated region;by the phase value to achieve the projection region mapping,and then project the standard fringe map corrected according to the saturation,and then remeasure the original saturated region,which can eliminate the saturation phenomenon,and combined with the original non-saturated region Combined with the high-precision phase of the original non-saturated area,the accurate measurement of highly reflective objects can be completed.The experiments show that this method is practical and feasible,and can complete the measurement of complex high-reflectivity surfaces.