by Marco Al <m.f.al@[EMAIL PROTECTED]
>
Nov 28, 2008 at 12:42 PM
Ibn-Batot wrote:
> aliasing happens when the spectrum of the signal (the image spectrum
> in here) overlaps so that the low pass filter cannot reconstruct the
> signal again, will decimation do that ?
Yes, you are just point sampling the image again but this time at a
lower sampling rate ...
> please send to me more information regarding the "small radius
> gaussian blur" and its effect on aliasing.
It's simply a low pass filter to reduce aliasing after the decimation
(doesn't eliminate it, you need a Sinc filter for that ... but sometimes
a little aliasing is better than the alternative, which is ringing).
Good luck ... use google for everything else :)
