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