In this paper, two methods of realizing optical pattern recognition, spatial matched filter correlation and joint transform correlation (JTC), were discussed first with the emphasis on the JTC.

本文首先论述了实现光学模式识别的两种方案，空间匹配滤波相关识别和联合变换相关识别的原理和技术。

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The fractional Fourier transform contains the spatial information and the spatial-frequency information simultaneously. The fractional correlation can be used to optical pattern recognition too.

分数傅里叶变换同时包含了空间域和空间频率域信息，分数相关也可以用于光学图样识别。

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