摘要
作为仪器仪表行业广泛采用的一种检测、计量手段,图像的非接触测量方法具有诸多优势。很多情况下,出于对被测物理量实际应用的考虑,往往在测量精度上提出了更高的要求。在不改变光组放大倍数和成像传感器分辨率的前提下,解决这一需求的最有效手段就是进行亚像素级测量。本文首先对图像非接触测量系统的组成做了原理性介绍和讨论,而后分别就光流法、相关拟合法、相位相关配准法、相位奇点法做了具体理论阐述。文中就激光散斑微位移测量的研究方法进行展开,进而借助一系列数学模拟和仿真手段,对上述方法一一做了0.1像素级精度的亚像素计算试验,并给出了具体测试结果和试验曲线。最后结合试验效果,论文给出了试验结论。
Non-contact measurement has many advantages,and is used widely in the automatic in-strument and apparatus.But in many situations,because of the actual application of physical quantity,the measurement precision must be improved to a higher level.The most effective means that can solve this demand is sub-pixel measurement,which doesn’t need to change the amplification of light group and the resolution of optical sensor.The composition of the non-con-tact measurement system is introduced and discussed.Then,some models,such as optical flow, phase correlation,related fitting,phase singularity,are elaborated.The laser speckle micro dis-placement measuring technique is discussed in detail.According to the mathematical simulations, the sub-pixel experiment of 0.1 pixel precision is done,and the measurement results and experi-mental curves are given.At last,the results and the conclusions are showed in detail.
出处
《工程与试验》
2013年第4期7-12,64,共7页
Engineering and Test
关键词
亚像素
光流
相位相关
散斑
相位奇点
sub-pixel
optical flow
phase correlation
laser speckle
phase singularity
