SAGA 9.4.2 | Tool Library Documentation

Gaussian Filter


Description

The Gaussian filter is a low-pass filter operator that is used to 'blur' or 'soften' data and to remove detail and noise. The degree of smoothing is determined by the kernel size specified as radius and the weighting of each raster cell within the kernel. The weighting scheme uses the Gaussian bell curve function and can be adjusted to the kernel size with the 'Standard Deviation' option.


Parameters

 NameTypeIdentifierDescriptionConstraints
InputGridgrid, inputINPUT--
OutputFiltered Gridgrid, output, optionalRESULT--
OptionsGrid Systemgrid systemPARAMETERS_GRID_SYSTEM--
Kernel Radiusinteger numberKERNEL_RADIUS-Minimum: 1 Default: 2
Standard Deviationfloating point numberSIGMAThe standard deviation as percentage of the kernel radius.Minimum: 1.000000 Default: 50.000000

Command Line


Usage: saga_cmd grid_filter 1 [-INPUT ] [-RESULT ] [-KERNEL_RADIUS ] [-SIGMA ]
  -INPUT:        	Grid
	grid, input
  -RESULT:       	Filtered Grid
	grid, output, optional
  -KERNEL_RADIUS:	Kernel Radius
	integer number
	Minimum: 1
	Default: 2
  -SIGMA:     	Standard Deviation
	floating point number
	Minimum: 1.000000
	Default: 50.000000