h a l f b a k e r yI think this would be a great thing to not do.
add, search, annotate, link, view, overview, recent, by name, random
news, help, about, links, report a problem
browse anonymously,
or get an account
and write.
register,
|
|
|
Please log in.
Before you can vote, you need to register.
Please log in or create an account.
|
Mathematically, real space and Fourier space are equivalent (via the Fourier transform). The Fourier domain also has some useful properties, such as efficiency in representing large objects and multi-resolution capabilities. I propose the use of Fourier goggles to automatically perform a Fourier transform
on normal visual input. They could be used for... well, I don't know what.
(???) Optical Fourier transform lab experiment
http://www.ee.bilke...al/html/node10.html
Here's a student lab experiment on doing the Fourier transform optically. [td, May 05 2001]
[link]
|
| |
Err... FFT then. Probably. |
|
| |
Possibly surprisingly, this is baked. An ordinary lens does a Fourier transform. This is routinely used to do spatial filtering optically -- you transform into Fourier space, use an ordinary neutral density filter to block selected frequencies and transform back. See the link. |
|
| |
At work we have an optical gadget set up to measure the resolution of the images we put on film. |
|
| |
Of course, it wasn't really
specified whether the Fourier
transform was with spatial or
temporal. (Spatial is probably a
better approximation; a temporal
Fourier transform would just be a
spectrogram of some sort, I guess.) |
|
| |
Yes, we learned about optical transforms in image processing class. (You just focus a lens in a certain way, and the 2D transform of the intensity of the image appears.) But goggles! That is genius! I want to try it. Would it give us any information we can't glean with our plain 'ol eyes? |
|
| |
If I remember right, holography works on somewhat related principles, but the interference patterns for different wavelengths of light do not coincide in any useful way. |
|
| |