Page 127 - EMODUL - PENGOLAHAN CITRA DIGITAL

Derau Gaussian Skala Keabuan

% Program 11.1 - Derau Gaussian

% Menghasilkan citra yang telah diberi derau menggunakan Gaussian.
% F = citra berskala keabuan
% sigma = standar deviasi fungsi Gaussian
% mu = rerata fungsi Gaussian

function [G] = Nightly111DerauGaussian(F, sigma, mu)

if nargin < 3
mu = 0; % Nilai bawaan mu end

if nargin < 2
sigma = 1; % Nilai bawaan deviasi standar end

[m, n] = size(F);

F = double(F);

for i=1 : m
for j=1 : nc
derau = randn * sigma + mu;
G(i,j) = round(F(i, j) + derau);

if G(i,j) > 255
G(i,j) = 255;
elseif G(i,j) < 0

G(i,j) = 0; end
end end

G = uint8(G);

Penggunaan fungsi Derau Gaussian skala keabuan

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