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Weighted Deviation

The Weighted Deviation command computes the Gaussian-weighted local standard deviation at each pixel. Pixels in smooth, uniform regions produce low values; pixels in textured or edge regions produce high values.

When to use

Use Weighted Deviation to:

  • Highlight regions with high local variation (edges, textures) while suppressing uniform areas.
  • Create a feature image for thresholding heterogeneous structures.

Parameters

ParameterDescription
Kernel sizeSize of the local window (range 3–27)
SigmaStandard deviation of the Gaussian weighting within the window

A larger kernel size and higher sigma increases the scale of the detected variation. Smaller values respond to fine-grained texture.