On Nov 26, 9:54=A0am, Marco Al <m.f...@[EMAIL PROTECTED]
> wrote:
> Ibn-Batot wrote:
> > Hello everybody,
> > is there any Matlab source for generating aliased images ? i need that
> > to help me measure how did i remove it later . The problem i am facing
> > is, the usual research is how to remove aliasing but i do not know the
> > implementation for their algorithms
>
> I'll assume you mean aliasing from undersampling (and not only edge
> aliasing caused by 3D rendering).
>
> Just decimate an image, instant aliasing. For the reference to compare
> the output of your filter against you use "good" downsampling on the
> original image, for instance by using a small radius gaussian blur
> before the decimation.
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 ? of course i mean spatial
aliasing which results from the sampling in less than Nyquist rate. is
there any paper or source which analyzes the aliasing in the frequency
domain ?
please send to me more information regarding the "small radius
gaussian blur" and its effect on aliasing.
thank you for your consideration of my request
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