How can i MakeNoise to the dataset dataset

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Mariem Harmassi 2012-9-15

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https://ww2.mathworks.cn/matlabcentral/answers/48219-how-can-i-makenoise-to-the-dataset-dataset

I found this code in matlab file D_SUB=MakeNoise(D_SUB, Noise) Does the MakeNoise exist ? It is a matlab function if no how can i make noise to a dataset ???

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Answer 1

Wayne King 2012-9-15

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https://ww2.mathworks.cn/matlabcentral/answers/48219-how-can-i-makenoise-to-the-dataset-dataset#answer_58918

在 MATLAB Online 中打开

MakeNoise.m is not a MathWorks' function, but there are many ways to add noise to a signal or image using MathWorks' functions. Is it an image that you want to add noise to (a matrix), or a signal (a 1-D vector)? What kind of noise do you want to add?

Look at the help for:

 randn
 rand
 imnoise
 awgn
 wgn

to get you started

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Mariem Harmassi 2012-9-15

编辑：Mariem Harmassi 2012-10-19

ok thank u it s an image.

Mariem Harmassi 2012-10-19

hi ,thank for the answer i found this function available through the net function D = MakeNoise(D, Noise) if Noise~=1 rannum=exp(normrnd(0,log(Noise),size(D,1),size(D,2))); D=D.*rannum; end end and i want to know how can i express the level of noise based on thsi function ? % i need a percent

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