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Re: Varying noise percentage with imnoise
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From: |
Andreas Weber |
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Subject: |
Re: Varying noise percentage with imnoise |
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Date: |
Sat, 05 Oct 2013 11:00:38 +0200 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130922 Icedove/17.0.9 |
Am 04.10.2013 04:12, schrieb Yathindu Rangana:
> imnoise (A, 'gaussian', 0, noiseLevel )
>
> I'm varying noiseLevel (variance) from 0.0 to 1.0, assuming that 0.0 is
> 0% noise and 1.0 is 100%.
>
> Is this assumption correct?
If you are unsure, you could also read the source of that function.
type "edit imnoise" and you will find
A = im2double (A);
fix_class = true;
if (nargin < 3), a = 0.00; endif
if (nargin < 4), b = 0.01; endif
A = A + (a + randn (size (A)) * sqrt (b));
HTH, Andy