Phase-shifting technique applied to circular harmonic-based joint transform correlator  

作　　者：Jiuhong Guan Zhaoqi Wang Hongli Liu Baolai Liang Guoguang Mu 

机构地区：[1]Nankai Univ, Inst Modern Opt, Minist Educ China, Optoelect Informat Sci & Technol Lab, Tianjin 300071, Peoples R China

出　　处：《Chinese Science Bulletin》2000年第20期1908-1912,共5页

摘　　要：The phase-shifting technique is applied to the circular harmonic expansion-based jointtransform correlator. Computer simulation has shown that the light efficiency and the discrimination capability are greatly enhanced, and the full rotation invariance is preserved after the phase-shifting technique has been used. A rotation-invariant optical pattern recognition with high discrimination capability and high light efficiency is obtained. The influence of the additive noise on the performance of the correlator is also investigated. However, the anti-noise capability of this kind of correlator still needs improving.The phase-shifting technique is applied to the circular harmonic expansion-based joint transform correlator. Computer simulation has shown that the light efficiency and the discrimination capability are greatly enhanced, and the full rotation invariance is preserved after the phase-shifting technique has been used. A rotation-invariant optical pattern recognition with high discrimination capability and high light efficiency is obtained. The influence of the additive noise on the performance of the correlator is also investigated. However, the anti-noise capability of this kind of correlator still needs improving.

关 键 词：joint TRANSFORM CORRELATOR PHASE-SHIFTING technique CIRCULAR HARMONIC expansion. 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]