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Fourier Optics Used for Optical Pattern Recognition
- peter_d_sherman 5y agoPDS: Opinion: One of the best videos on the Fourier Transform I've ever seen, with a focus on optical pattern recognition... Worth re-watching again and again, in my opinion... Key takeaway: Digital computers can compare (subtract) two Integers (as bit patterns) in a speed evolution (over the past 50 years or so) from milliseconds to microseconds to nanoseconds -- but even those comparisons are limited by the speed of electricity and the necessity of multiple step transformations of logic gates... Lenses, on the other hand, can perform complex pattern comparisons (via Fourier Transforms) -- at the speed of light -- ORDERS OF MAGNITUDE FASTER -- for more complex (non-binary, "multiple-waves-at-a-time") comparisons! Opinion: Optical computing is the future...
- jschveibinz 5y agoOptical computing has been around a very, very long time. It is actually never as good as digital computing because even though it is very fast, the dynamic range of the sensors is usually the limiting performance factor. Floating point, however, has practically infinite dynamic range. So digital almost always wins.
- dekhn 5y agoThis is awesome. I just love that people are building these things at home with their own money and sharing it. BTW, physicists were doing this 100 years ago. Well before the fast fourier transform.