CalcMeans

With this you can compute variogram and madogram (but remember that for
classical geostatistical indexes you need to divide the derived isotropic index by 2!)

Methods for the computation of surface/image texture indices using a geostatistical based approach (Trevisani et al. (2023) <doi:10.1016/j.geomorph.2023.108838>). It provides various functions for the computation of surface texture indices (e.g., omnidirectional roughness and roughness anisotropy), including the ones based on the robust MAD estimator. The kernels included in the software permit also to calculate the surface/image texture indices directly from the input surface (i.e., without de-trending) using increments of order 2. It also provides the new radial roughness index (RRI), representing the improvement of the popular topographic roughness index (TRI). The framework can be easily extended with ad-hoc surface/image texture indices.

Sebastiano Trevisani

SurfRough

Calculate Surface/Image Texture Indexes

Ilich Alexander

CalcMeans function

<dl><dt>deltas</dt>
<dd>The values from which calculate the median of absolute values (i.e., directional differences of order K)</dd>
<dt>w</dt>
<dd>The moving window used (e.g. w=KernelCircular(3))</dd>
<dt>exponent</dt>
<dd>The exponent: increasing the exponent increase the sensitivity to outliers. Set 2 for Variogram and 1 for Madogram.</dd></dl>

Arguments

Calculate the mean of absolute values raised to an exponent found in a search window — CalcMeans

<dl>

<dt>deltas</dt>
<dd>The values from which calculate the median of absolute values (i.e., directional differences of order K)</dd>


<dt>w</dt>
<dd>The moving window used (e.g. w=KernelCircular(3))</dd>


<dt>exponent</dt>
<dd>The exponent: increasing the exponent increase the sensitivity to outliers. Set 2 for Variogram and 1 for Madogram.</dd>

</dl>

CalcMeans: Calculate the mean of absolute values raised to an exponent found in a search window

Description

Usage

Value

Arguments