Tool Gaussian Filter

The Gaussian filter is a smoothing operator that is used to 'blur' or 'soften' data and to remove detail and noise. The degree of smoothing is determined by the standard deviation. For higher standard deviations you need to use a larger search radius.

Author: A.Ringeler (c) 2003
Menu: Grid|Filter
WIKI: http://sourceforge.net/apps/trac/saga-gis/wiki/grid_filter_1

Parameters

	Name	Type	Identifier	Description	Constraints
Input	Grid	Grid (input)	`INPUT`	-	-
Output	Filtered Grid (*)	Grid (optional output)	`RESULT`	-	-
Options	Grid system	Grid system	`PARAMETERS_GRID_SYSTEM`	-	-
	Standard Deviation	Floating point	`SIGMA`	The standard deviation as percentage of the kernel radius, determines the degree of smoothing.	Minimum: 0.000100 Default: 50.000000
	Kernel Type	Choice	`KERNEL_TYPE`	The shape of the filter kernel.	Available Choices: [0] Square [1] Circle Default: 1
	Kernel Radius	Integer	`KERNEL_RADIUS`	The kernel radius in cells.	Minimum: 1 Default: 2
(*) optional

Command-line

Usage: saga_cmd grid_filter 1 [-INPUT <str>] [-RESULT <str>] [-SIGMA <double>] [-KERNEL_TYPE <str>] [-KERNEL_RADIUS <num>]
  -INPUT:<str>        	Grid
	Grid (input)
  -RESULT:<str>       	Filtered Grid
	Grid (optional output)
  -SIGMA:<double>     	Standard Deviation
	Floating point
	Minimum: 0.000100
	Default: 50.000000
  -KERNEL_TYPE:<str>  	Kernel Type
	Choice
	Available Choices:
	[0] Square
	[1] Circle
	Default: 1
  -KERNEL_RADIUS:<num>	Kernel Radius
	Integer
	Minimum: 1
	Default: 2