光折变动态存取自适应联合变换相关器

Adaptive Joint Tansform Correlator Using a Photorefractive Crystal as a Reference Image Updating Device

提出了一种利用光折变晶体的动态存取性能构成自适应联合变换相关器的方法，其中光折变晶体用于参考图像的时间延迟和相继更新。由该方法可实现全光学目标跟踪系统，在任一时刻只有单一图像输入该系统，该时刻直接透射的目标像与晶体再现的前一时刻的目标像产生相关并给出目标的运动信息。进行了目标跟踪的初步实验。

A novel adaptive joint transform correlator (JTC) using a photorefractive crystal as a time delay and sequentially updating device for reference images is proposed. Based on this method an all optical motion target tracking system can be constructed. At any time there is only one image input to the system, and this direct image correlates with the previous stored image read out from the crystal to give the target motion information. A preliminary experiment of target tracking is carried out to verify this method, the results agree fully with theoretical expectations.