How can I calculate skewness and kurtosis of an image?

I want to calculate the skewness and kurtosis of a satellite image in MATLAB. Please give me the code how to do so

Answer 1

[Omega]

Hi Vidhya,

To calculate descriptive statistics (such as mean, variance, skewness, kurtosis, etc.) for an image, you first need to obtain the histogram of the image. If your image is not in grayscale, you can either work on all three channels (R, G, B) separately or convert the image to grayscale and then compute these statistics on the pixel intensity values, depending on your use case.

If you have access to the "Statistics and Machine Learning Toolbox," you can use the built-in functions for "skewness" and "kurtosis." You can refer to the following documentation links to learn more:

https://www.mathworks.com/help/stats/skewness.html

https://www.mathworks.com/help/stats/kurtosis.html

If you do not have access to the "Statistics and Machine Learning Toolbox," I suggest checking out the following related MATLAB Answer:

https://www.mathworks.com/matlabcentral/answers/15307-image-operations-skewness-and-kurtosis

I hope it helps!