fast_almost_gaussian_filter
Fast almost gaussian filter
Image processing
https://www.whiteboxgeo.com/manual/wbw-user-manual/book/tool_help.html#fast_almost_gaussian_filter
QgsProcessingParameterRasterLayer|inputRaster1|Raster (Raster)|None|False
QgsProcessingParameterNumber|sigma2|Sigma (float)|QgsProcessingParameterNumber.Double|1.8|False|None|None
QgsProcessingParameterRasterDestination|fnOutput|Output (Raster)|None|False
