Performs an edge-preserving average filter on the image.

Highlight edges in medical images by averaging pixels.
| Framework | Member |
|---|---|
| .NET | SigmaCommand |
| .NET 6+ | SigmaCommand |
| iOS / OS X | LTSigmaCommand |
| C DLL | L_SigmaFilterBitmap |
| C++ Class Library | LBitmap::SigmaFilter |