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BUILT-IN MATHEMATICA SYMBOL

KuwaharaFilter

computes for each pixel p in image the variance of the values in the four

squares that have p as a corner, and replaces p with the mean of the values of the square with least variance.

KuwaharaFilter is a non-linear local filter typically used for edge-preserving smoothing.

KuwaharaFilter works with binary, grayscale, and color images. For multi-channel images, KuwaharaFilter computes the sum of the variances in each channel.

Smoothing the image, while preserving the edges:

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Use Kuwahara filtering as a preprocessing step for image segmentation:

Remove salt-and-pepper noise:

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