用傅里叶光学做光学模式识别

Huygens Optics explains the Fourier transform and shows how a lens performs one optically. A DLP projector is used as a Fourier filter to do simple pattern recognition on lithographic character patterns.

Why HN likes it: Recommended as one of the best explanations of Fourier transforms and a clear demo of analog optical computing.

“The video happens to have one of the best explanations of Fourier transforms I've yet encountered.”