overhead projector

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Fourier Optics used for Optical Pattern Recognition

Fourier Optics used for Optical Pattern Recognition

103K views • 6 years ago

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.

The highway where trucks work like electric trains

The highway where trucks work like electric trains

5.3M views • 5 years ago

Tom Scott visits an eHighway test in Lubeck, Germany, where electric trucks with pantographs draw power from overhead wires. He explains how this could electrify road freight.