NAME
i.sar.speckle - Remove speckle from SAR image
KEYWORDS
imagery,
speckle,
sar,
radar
SYNOPSIS
i.sar.speckle
i.sar.speckle --help
i.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
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.
Lee, J. S. (1986). Speckle suppression and analysis for synthetic aperture
radar images. Optical engineering, 25(5), 255636.
r.neighbors
Margherita Di Leo
SOURCE CODE
Available at:
i.sar.speckle source code
(history)
Latest change: Monday Jan 30 19:52:26 2023 in commit: cac8d9d848299297977d1315b7e90cc3f7698730
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GRASS Development Team,
GRASS GIS 8.4.1dev Reference Manual