High accuracy correlative detection technology of object signal is to search and detect objects by optical correlation , and it can detect real - timely , recognize automatically and orientate precisely , optical correction processes images at light speed and its device is simple , and fourier transformation can be realized 高精度光学目标信号相关测试技术，利用光学相关探测方法，对要搜索、探测的目标进行实时探测，自动识别，高精度定位。光学相关是以光速进行的，处理速度快，结构简单，利用由空间域到频率域的傅立叶变换来实现的，本文针对如何设计傅立叶变换系统实现光学相关进行研究。
Digital - optical hybrid image processing , optical pattern recognition ( opr ) technique performs image processing and recognition through optical correlation and digital processing . it has promising application prospect in automatic target recognition because of its outstanding merits of high - speed parallel operation , high spatial resolution , flexibility and accuracy 光电混合图像处理、光学模式识别( opr )技术以光学相关与数字处理相结合的方式实现对图像信号的处理与识别，因而具有光速运算、高速并行处理、高分辨率与计算机的灵活性、精确性的突出优点，在自动目标识别( atr )领域有着良好的应用前景。
Secondly , the nonlinear joint transform correlation recognition and the photorefractive correlation recognition are investigated by computer simulation and experiment , and the research results are given as following : ( 1 ) the correlation discrimination of the jtc can be greatly improved by binarizing the joint transform power spectrum nonlinearly . it is found in our experiment that the threshold magnitude has great influence on the correlation output of a binary jtc 其次，通过理论分析、计算机模拟和实验研究的方法，对非线性联合变换相关识别和光折变光学相关识别进行了研究，并给出了研究结果： ( 1 )对联合变换功率谱进行二值化处理可以使得功率谱高频成份得到较大提高，从而大大提高联合变换相关器的识别能力。
Optical fourier transformation lens are designed automatically mainly depending on optical design software . after the optical original system being worked out by p , w method , they can be designed automatically by using computer . every parameter of the system is changed simultaneously and aberration is adjusted according to optimizing theory , after the parameters are iterated a lot of times , perfect fourier transformation system is obtained , and the requirement of optical correlation detection can be satisfied 光学傅立叶变换透镜的设计，主要利用光学设计软件进行光学自动设计，用p 、 w法初步计算出光学原始系统，再利用计算机进行自动设计，按优化理论对光学系统的各个参数同时给出不同的改变，进行像差校正，经多次迭代后可得到比较理想的傅立叶变换系统，使该系统能够满足光学相关探测的要求。
This paper is aiming at image recognition based on angle - multiplexed volume holographic correlator . the principles of the volume holographic storage are firstly introduced in this paper . they are the recording , reconstruction , diffraction efficiency and angular selectivity of volume holograms 本论文首先介绍体全息存储的基本概念和理论，它包括体全息图的记录和再现，体全息图的衍射效率，体全息图的水平、垂直角度选择性等，并介绍了光学相关器和图像识别。
