How can I implement these equations in Matlab programming?

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Hi guys, I got to analyse image that is created by Atomic Force Microscope so contains different height values. But I want to make sure I implement these equations correctly, can somebody please help. Would be much appreciated.

Best regards, Matiss

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Matt J 2015-9-25

It's hard to help unless you show us the code you've written.

Matiss Ozols 2015-9-25

There is no code I have Written yet. I got to understand how to express these mathematical expressions in the matlab. I have 2 D matrix. MN is the area of the image, I know that. and Z are the image values. but how do I get the integrations and the whole equation.

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Thorsten 2015-9-25

编辑：Thorsten 2015-9-25

在 MATLAB Online 中打开

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If you have your height values in a 2D matrix Z, use

 sa = mean2(abs(Z));
 sq = sqrt(mean2(Z.^2))
 sz = max(Z(:)) - min(Z(:))

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Muthu Annamalai 2015-9-25

@Matiss - you need to divide by area if you want normalized numbers. You can be rest assured these results from code by @Thorsten is only off by a constant scale factor (of area of image in question with additional fixed constants) from this other software you are mentioning.

Thorsten 2015-9-27

编辑：Thorsten 2015-9-27

You don't have to divide by MN, this is done by the mean2 function. Can you check results with small images an find out which result is correct?

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