Fourier Optics used for Optical Pattern Recognition
Huygens Optics
@huygensopticsAbout
Hi, my name is Jeroen and on the Huygens Optics channel I publish videos on personal projects. My main fields of interest are optics, mechanics and photolithography. The videos aren't targeted towards a general audience but for people with a passion for science and technology (e.g. my fellow nerds). The channel is named after the famous Dutch mathematician, astronomer and inventor Christiaan Huygens (1629-1695). He was the first to publish a mathematical description of the wave properties of light, and also discovered Saturn's rings. I make these videos for fun, without a financial motivation. Please don't contact me for sponsoring contracts or in-video advertisement. Neither me nor my viewers are interested. If you want to contribute as a viewer, you can do so by either donating using the Paypal link or by using the Patreon account: https://www.patreon.com/huygens_optics Your donation helps me to make better videos.
Latest Posts
Video Description
Optical Fourier transformations were performed using small lithographic patterns of different characters. A DLP projector can be used as a Fourier filter to do simple pattern recognition. Video contents: 0:00 General introduction 1:44 Fourier explained (simple) 3:45 Digging a bit deeper (sorry, could not resist) 5:55 Fourier on images 9:27 Fourier transforms using optics 12:05 Setup and results 14:15 Fourier filtering The 2D Fourier transformation images were calculated using freeware developed by Kobe University. You dan download this tool from: http://cas.eedept.kobe-u.ac.jp/WelcomeES1/OpenSoft/FFT2D/index_en.html Conversions of 2D images to 3D were done using Gwyddion. This very advanced piece of software is can be downloaded for free from: http://gwyddion.net/download.php To illustrate 2D Fourier transform on an actual image, a small part of an M.C. Escher drawing was used. While editing the material for this video I found out that the Applied Science channel made a somewhat similar video on "Optical Fourier" already in 2012: https://www.youtube.com/watch?v=wcRB3TWIAXE . Luckily the angle is somewhat different. This video gives a different (and deeper) perspective on the math behind Fourier transformations; https://www.youtube.com/watch?v=7mkn47hqqkc If you want to go all the way, read the wiki page on Fourier. If you dare. https://en.wikipedia.org/wiki/Fourier_transform
You May Also Like
Optical Pattern Recognition Mastery
AI-recommended products based on this video
