实时高通滤波的联合变换相关器

提出一种实时高通滤波的联合变换相关器．采用液晶显示屏作为输入器件，用液晶光阀记录和显示联合功率谱．使用预滤波器除去显示屏上的光栅状结构的频谱．利用成象透镜放大联合频谱以利于高通滤波操作．应用高通滤波器来提高相关图象的输出性能．分析了高通滤波器的设计．计算机模拟结果和实验结果证实了该系统设计及性能分析的正确性．

Real Time High Pass Filtering Joint Transform Correlator

A real time high pass filtering joint transform correlator is proposed, in which a liquid crystal display screen is adopted as input device and the joint power spectrum is recorded and displayed by a liquid crystal light valve. A prefilter is utilized to remove frequency spectrum of the grating-type structure on the screen. For the benefit of filtering operation, an imaging lens is applied to amplifying joint frequency spectrum. A high pass filter is used to enhance the output performence of correlation pattern. The design of high pass filter is analized.The computer simulation results and the experimental results verified the correctness of the system design and performance analysis.