提出一种光电混合匹配滤波相关识别方法,只用一个空间光调制器实现了匹配滤波相关识别。利用计算机完成匹配滤波器的设计以及匹配滤波器与输入目标频谱的卷积运算,根据最小欧氏投影编码原理将卷积结果转化为空间光调制器可以显示的灰度信号,再通过2f光学傅里叶变换系统,得到相关识别结果。实验结果表明,该方法可以得到明显的相关点,同时可以避免传统VLC中匹配滤波器的精确复位问题,而且该系统还可以应用于联合变换相关识别。

A new method of constructing a hybrid photoelectric system is described which can realize the matched filtering correlation recognition by using only one spatial light modulator(SLM). The proposed method is based on the use of computer to complete the design of matched filters and convolution of mathed filters with input image’s spectrum. The result can be impletemented on SLM to produce a grayscale image based on the minimum Euclidean distance projective principle. Then by optical Fourier transform in 2f hybrid photoelectric system, the correlation output can be observed. Experimental results get visible correlation spot. The method can avoid the accuracy reposition problem for matched filters in traditional VanderLugt correlator(VLC). This system can also be applied in joint transform correlation.