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Thread Subject:
Do not understand the noise problem in an image ?!

Subject: Do not understand the noise problem in an image ?!

From: Toan Cao

Date: 22 Oct, 2010 14:14:04

Message: 1 of 1

hi, everyone!

I am beginning to work in image processing. And there are some things related noise in image which i am not clear.
i use Matlab and make a noise image with function ' imnoise() '
In this function, i need to assign some parameters. For example, Gaussian noise model, i will assign two parameters: mean, deviation (or variance).
In an image, what do these parameters mean if i describe them in pixel ? what is it if i say deviation σ=0.5 pixel
Please help me to understand deeply this.
Thank you so much !

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