SAGA-GIS Tool Library Documentation (v7.2.0)

Tool Morphological Filter

Morphological filter for grids. Dilation returns the maximum and erosion the minimum value found in a cell's neighbourhood as defined by the kernel. Opening applies first an erosion followed by a dilation and closing is a dilation followed by an erosion.

Parameters

 NameTypeIdentifierDescriptionConstraints
InputGridGrid (input)INPUT--
OutputFiltered Grid (*)Grid (optional output)RESULT--
OptionsGrid systemGrid systemPARAMETERS_GRID_SYSTEM--
MethodChoiceMETHODChoose the operation to perform.Available Choices:
[0] Dilation
[1] Erosion
[2] Opening
[3] Closing
Default: 0
Kernel TypeChoiceKERNEL_TYPEThe shape of the filter kernel.Available Choices:
[0] Square
[1] Circle
Default: 1
Kernel RadiusIntegerKERNEL_RADIUSThe kernel radius in cells.Minimum: 1
Default: 2
(*) optional

Command-line

Usage: saga_cmd grid_filter 8 [-INPUT <str>] [-RESULT <str>] [-METHOD <str>] [-KERNEL_TYPE <str>] [-KERNEL_RADIUS <num>]
  -INPUT:<str>        	Grid
	Grid (input)
  -RESULT:<str>       	Filtered Grid
	Grid (optional output)
  -METHOD:<str>       	Method
	Choice
	Available Choices:
	[0] Dilation
	[1] Erosion
	[2] Opening
	[3] Closing
	Default: 0
  -KERNEL_TYPE:<str>  	Kernel Type
	Choice
	Available Choices:
	[0] Square
	[1] Circle
	Default: 1
  -KERNEL_RADIUS:<num>	Kernel Radius
	Integer
	Minimum: 1
	Default: 2