Almeida S P, Eu J K
Appl Opt. 1976 Feb 1;15(2):510-5. doi: 10.1364/AO.15.000510.
Presented are some results obtained from the application of matched spatial filtering techniques to the identification of biological specimens called diatoms (i.e., water algae). A prototype semiautomatic optical processor has been developed that utilizes the Vander Lugt type complex spatial filters. We describe the optical filter averaging technique employed and discuss our semi in situ developing method for the filters. The advantage of this method with regards to the critical position requirements for time sharing optical filters is also presented. The filter holder is mounted on X, Y stages and precision positioned under the control of a PDP-11-40 computer.
本文展示了一些通过应用匹配空间滤波技术来识别称为硅藻（即水藻）的生物标本所获得的结果。已开发出一种利用范德卢格特型复数空间滤波器的半自动光学处理器原型。我们描述了所采用的光学滤波器平均技术，并讨论了我们的滤波器半原位显影方法。还介绍了该方法在分时光学滤波器关键位置要求方面的优势。滤波器支架安装在X、Y轴工作台上，并在PDP - 11 - 40计算机的控制下进行精确定位。
