NAME
i.sar.speckle - Remove speckle from SAR imageKEYWORDS
imagery, speckle, sar, radarSYNOPSIS
i.sar.speckle
i.sar.speckle --helpi.sar.speckle input=name output=name method=string size=integer [--overwrite] [--help] [--verbose] [--quiet] [--ui]
Flags:
- --overwrite
- Allow output files to overwrite existing files
- --help
- Print usage summary
- --verbose
- Verbose module output
- --quiet
- Quiet module output
- --ui
- Force launching GUI dialog
Parameters:
- input=name [required]
- Name of input image
- output=name [required]
- Name of output image
- method=string [required]
- Method for speckle removal
- Options: lee
- Default: lee
- size=integer [required]
- Size of neighborhood
- Default: 11
Table of contents
DESCRIPTION
A simple procedure to reduce speckle noise in SAR images.
So far, the only algorithm implemented is the Lee filter. So, the method parameter is set to lee by default.
The size parameter is the one used in r.neighbors and is used to calculate local mean and local square mean. It must be odd.
REFERENCES
Lee, J. S. (1986). Speckle suppression and analysis for synthetic aperture radar images. Optical engineering, 25(5), 255636.SEE ALSO
r.neighborsAUTHOR
Margherita Di LeoSOURCE CODE
Available at: i.sar.speckle source code (history)
Main index | Imagery index | Topics index | Keywords index | Graphical index | Full index
© 2003-2020 GRASS Development Team, GRASS GIS 7.8.3dev Reference Manual