Sku - Kurtosis

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Sku - Kurtosis

Kurtosis is a measure of the peakedness or sharpness of the surface.  The digital representation of this parameter is displayed below.


Equation - Sku - Kurtosis


A Gaussian surface has kurtosis value of 3.  A surface that is centrally distributed has a kurtosis value greater than 3.  A surface that has a well spread out distribution has a kurtosis value of less than 3.  By using a combination of the skewness and kurtosis values, it is possible to identify plateau honed surfaces that have relatively flat top, but contains deep valleys.


Equation - Sku - Graphical Rep