SAGA-GIS Module Library Documentation (v2.1.3)

Module Laplacian Filter

Other Common Names: Laplacian, Laplacian of Gaussian, LoG, Marr Filter

Standard kernel 1 (3x3):
0 | -1 | 0
-- + -- + --
-1 | 4 | -1
-- + -- + --
0 | -1 | 0

Standard kernel 2 (3x3):
-1 | -1 | -1
-- + -- + --
-1 | 8 | -1
-- + -- + --
-1 | -1 | -1

Standard kernel 3 (3x3):
-1 | -2 | -1
-- + -- + --
-2 | 12 | -2
-- + -- + --
-1 | -2 | -1

Parameters

 NameTypeIdentifierDescriptionConstraints
InputGridGrid (input)INPUT--
OutputFiltered Grid (*)Grid (optional output)RESULT--
OptionsMethodChoiceMETHOD-Available Choices:
[0] standard kernel 1
[1] standard kernel 2
[2] Standard kernel 3
[3] user defined kernel
Default: 3
Standard Deviation (Percent of Radius)Floating pointSIGMA-Minimum: 0.000010
Default: 50.000000
RadiusIntegerRADIUS-Minimum: 1
Default: 3
Search ModeChoiceMODE-Available Choices:
[0] square
[1] circle
Default: 1
(*) optional

Command-line

Usage: saga_cmd grid_filter 2 -INPUT <str> [-RESULT <str>] [-METHOD <str>] [-SIGMA <str>] [-RADIUS <num>] [-MODE <str>]
  -INPUT:<str> 	Grid
	Grid (input)
  -RESULT:<str>	Filtered Grid
	Grid (optional output)
  -METHOD:<str>	Method
	Choice
	Available Choices:
	[0] standard kernel 1
	[1] standard kernel 2
	[2] Standard kernel 3
	[3] user defined kernel
	Default: 3
  -SIGMA:<str> 	Standard Deviation (Percent of Radius)
	Floating point
	Minimum: 0.000010
	Default: 50.000000
  -RADIUS:<num>	Radius
	Integer
	Minimum: 1
	Default: 3
  -MODE:<str>  	Search Mode
	Choice
	Available Choices:
	[0] square
	[1] circle
	Default: 1