Colors\Bilateral filter
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This tool is accessible via the 'Edit > Colors > Bilateral filter' 
menu.
Description
Smooths a colors by applying a bilateral filter to the color components individually using the active scalar field as well.
parameters
- spatial sigma: the Normal distribution variance for the spatial part of the filter
- scalar sigma: the Normal distribution variance for the scalar part of the filter
- color threshold: if all 3 color components of a point are below the threshold value or above '255 - threshold value', then this color will not be used in the computation.
- Example: if threshold = 2, rgb(0,0,0) is excluded, rgb(2,2,2) is excluded, rgb(253,253,253) is excluded, rgb(255,255,255) is excluded, but rgb(100,255,255) is included.
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| No Filter | Edit > colors > Gaussian filter | Edit > colors > Bilateral filter | Edit > colors > Mean filter | Edit > colors > Median filter |
Note: the original colors will be overwritten. If you want to preserve original colors, use Edit > Colors > Convert to scalar field