Is it possible to estimate noise in real time image?The code give below is correct or not?

Anitha Thomas @Anitha_Thomas4

01 January 2019 0 3K Report

function Sigma=estimate_noise1(I)

[H W]=size(I);

I=double(I);

% compute sum of absolute values of Laplacian

M=[1 -2 1; -2 4 -2; 1 -2 1];

Sigma=sum(sum(abs(conv2(I, M))));

% scale sigma with proposed coefficients

Sigma=Sigma*sqrt(0.5*pi)./(6*(W-2)*(H-2));

end

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