Tool 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

Author: A.Ringeler (c) 2003, O.Conrad (c) 2008
Menu: Grid|Filter
WIKI: http://sourceforge.net/apps/trac/saga-gis/wiki/grid_filter_2

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`	-	-
	Method	Choice	`METHOD`	-	Available Choices: [0] standard kernel 1 [1] standard kernel 2 [2] Standard kernel 3 [3] user defined kernel Default: 3
	Standard Deviation	Floating point	`SIGMA`	The standard deviation, expressed as a percentage of the radius.	Minimum: 0.000010 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 2 [-INPUT <str>] [-RESULT <str>] [-METHOD <str>] [-SIGMA <double>] [-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] standard kernel 1
	[1] standard kernel 2
	[2] Standard kernel 3
	[3] user defined kernel
	Default: 3
  -SIGMA:<double>     	Standard Deviation
	Floating point
	Minimum: 0.000010
	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