impoisson

版本 1.0.1 (1.9 KB) 作者: Dirk-Jan Kroon
Generates Poisson noise from (image) data. It is a raw but fast implementation based on inversion method and Gaussian approximation
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更新时间 2024/5/17

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Function which generates Poisson noise / Poisson distribution from the data. It is a raw implementation and uses the inversion method for counts smaller than 30, and gaussian approximation for larger values. The code is vectorized and faster then default imnoise(I,'poisson') and poissrnd
J = impoisson(I)
If I is integer like uint8 the counts equal the input values
If I is single precision then the counts are assumed 1e6 x the input value
If I is double precision then the counts are assumed 1e12 x the input value
Example
X = uint16(repmat((1:1000),1000,1));
Y = impoisson(X);
figure, plot(Y(:)); hold on; plot(X(:),'r')
figure, imshow([X,Y],[])

引用格式

Dirk-Jan Kroon (2026). impoisson (https://ww2.mathworks.cn/matlabcentral/fileexchange/166076-impoisson), MATLAB Central File Exchange. 检索时间: .

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1.0.1

updated example
1.0.0