Please create an account to participate in the Slashdot moderation system

 



Forgot your password?
typodupeerror

Submission Summary: 0 pending, 1 declined, 0 accepted (1 total, 0.00% accepted)

What's the story with these ads on Slashdot? Check out our new blog post to find out. ×
Math

Submission + - Shannon-Nyquist sampling theory uneccessary->

midicase writes: Compressive sensing: It's a way of sampling and reconstructing an analogue signal at a rate far lower than standard information theory would deem possible. Olga Holtz explains that compressive sensing relies on the fact that most analogue signals have a structure of some kind that can be exploited to reconstruct them. Know this structure and the signal can be reconstructed using a sampling rate that is significantly lower than the Nyquist rate. That's going to have big implications for all kinds of measurements. Holtz gives the example of a camera developed by Richard Baraniuk and Kevin Kelly at Rice University which produces an image equivalent to a 5 megapixel image compressed using a standard jpeg algorithm to about 50,000 pixels. Paper is at http://arxiv.org/abs/0812.3137
Link to Original Source

Your good nature will bring you unbounded happiness.

Working...