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Thread Subject: Wiener filter

Subject: Wiener filter

From: Raje Shekar

Date: 17 Jan, 2008 05:55:04

Message: 1 of 2

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Hello all,

i want to apply wiener2 to an image.
how can i calculate the variance of a matrix to be
applied to wiener2

I used var command, but that returns column variance and
shows error with wiener2 cmd.

How to proceed with any idea ....

Thanks
Raje.

Subject: Wiener filter

From: Anh Huy Phan

Date: 17 Jan, 2008 08:38:02

Message: 2 of 2

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"Raje Shekar" <sendhema@mathworks.com> wrote in message
<fmmqjn$bhm$1@fred.mathworks.com>...
> Hello all,
>
>
> i want to apply wiener2 to an image.
> how can i calculate the variance of a matrix to be
> applied to wiener2
>
> I used var command, but that returns column variance and
> shows error with wiener2 cmd.
>
> How to proceed with any idea ....
>
> Thanks
> Raje.

The wiener2 function does not require variance of image as
the input parameter.

However, the variance of noise could be considered and
estimated as the 3rd parameter.
J = WIENER2(I,[M N],NOISE)

Anh Huy Phan
RIKEN - BSI

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