基于散斑位移相关器的相关峰增强技术

Research on Correlation Peak Enhancement Technique Based on Speckle-displacement Correlator

提出的基于光学数字联合变换的光学散斑位移相关器,用来确定亚像素精度相关峰的位置,却没有使用复杂的插值算法。为了实现相关峰的放大,对相关器的主要参数进行了分析和计算。并以此建立了实现光学散斑位移技术的实验装置,实验结果表明,该装置能产生尖锐和狭窄的相关峰,且能以亚像素精度发现峰位置。

The proposed optical speckle-displacement correlator based on hybrid optical-electronic joint transform correlator architecture has been used to determine the correlation peak position with subpixel accuracy,without using the intricate interpolation algorithms.A thorough analysis and a calculation of the main parameters of the correlator are performed in order to obtain an accurate defnition of the peak position.An experiment setup for realization of the optical speckle-displacement technique has been constructed.The experimental results have shown that the setup can produce sharp and narrow correlation peaks,and the peak position with subpixel accuracy can be found.