Calculating kurtosis and skewness using moment function

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Sajid Khan
Sajid Khan 2013-5-27
Hi Everyone,
I am trying to calculate skewness and kurtosis of an image. Kurtosis is 4th order moment while skewness is 3rd order moment whose formulas are given below:
KURT = E〖(x-µ)〗^4/σ^4
SKEW = E〖(x-µ)〗^3/σ^3
I am using matlab function moment as below
Kurt = moment(image(:),4)
Skew = moment(image(:),3)
Am I doing it in a correct way?

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回答（1 个）

Image Analyst
Image Analyst 2013-5-27
I think you need to subtract the mean from the image. It's the 3rd and 4th central moment. By the way, don't name a variable "image" since it's the name of a built-in function.

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