%%

clear;

clc;

lennaIm = imread("lenna.tif");

noiseIm = unifrnd(0,64,size(lennaIm));

lennaNoised = uint8(lennaIm + uint8(noiseIm));%% 0-64之間的均勻分佈。

figure

imshow(lennaNoised);

%%

clear;

clc;

lennaIm = imread("lenna.tif");

noiseIm = gamrnd(64,1,size(lennaIm)); %64有點類似於高斯分佈的mu，1是控制機率密度有點像高斯分佈。

lennaNoised = uint8(lennaIm + uint8(noiseIm));%% 0-64之間的均勻分佈。

figure

imshow(lennaNoised);