MATLAB: How to add uniform noise with given range

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I can't find any good documentation on adding uniform noise with a given range. Does anyone know how to do it? Or can someone point me in the right direction to figure it out.

Add uniform noise to an image with range [-0.05 to 0.05]

Best Answer

lower_bound = something
upper_bound = something
n = number of samples
u = lower_bound + rand(1,n)*(upper_bound-lower_bound);

This is the second example in the doc:

https://www.mathworks.com/help/matlab/ref/rand.html?searchHighlight=rand&s_tid=doc_srchtitle

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MATLAB: Adding gaussian white noise to data

doc randn

or online

http://www.mathworks.com/help/techdoc/ref/randn.html

MATLAB: Failed to add uniform noise to the image

Hi. You don't need imnoise:

round(128+0.2)=128

with 0.1 and 0.2 like you didn't add any noise. Uniform noise with zero mean:

image = ones([512,512])*128;
A = -30;
B = 30;
matrix_uniform = A + (B-A)*rand(size(image));
noisy_image = image + matrix_uniform;
figure,
subplot(1,2,1)
imshow(noisy_image./255), 
subplot(1,2,2)
imhist(uint8(noisy_image))

Best Answer

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MATLAB: Adding gaussian white noise to data

MATLAB: Failed to add uniform noise to the image

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