Harmonic Mean Filter

Command

Image
Filters
Harmonic Mean Filter

Description

Applies a harmonic mean filter to an image.

In the harmonic mean method, the color value of each pixel is replaced with the harmonic mean of color values of the pixels in a surrounding region.

The harmonic mean is defined as:

harmonic mean

A larger region (filter size) yields a stronger filter effect with the drawback of some blurring.

The harmonic mean filter is better at removing Gaussian type noise and preserving edge features than the arithmetic mean filter. The harmonic mean filter is very good at removing positive outliers.

Dialog box

Filter Size: larger filter yields stronger effect.

Click Preview to judge the results.

Click OK to proceed.

Examples

Before: After:

See also

 

 

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