BINARY NONLINEAR JOINT TRANSFORM CORRELATOR PERFORMANCE WITH DIFFERENT THRESHOLDING METHODS UNDER UNKNOWN ILLUMINATION CONDITIONS

摘要

The correlation performance of binary joint transform correlators with unknown input-image light illumination is investigated for different thresholding methods used in the Fourier plane. It is shown that a binary joint transform correlator that uses a spatial frequency dependent threshold function for binarization of the joint power spectrum is invariant to uniform input-image illumination. Computer simulations and optical experimental results are provided. [References: 17]