MATLAB: How can a matlab code be written for identification of noise using statistical features like kurtosis and skewness

Image Processing Toolboxkurtosisskewness

noise identification in images using statistical features like kurtosis and skewness

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Try this: http://www.mathworks.com/matlabcentral/answers/8026-best-way-s-to-master-matlab
Skewness can indicate possible noise if the distribution of normal, noise-free pixels is known to be Gaussian. However that is often not the case and so skewness I don't think will be useful in general. There's even a less likely case that can be made for kurtosis. Even noise-free images could have a non-zero skewness and kurtosis, so what does that tell you?
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