i.sar.speckle - GRASS GIS manual

Note: This document is for an older version of GRASS GIS that has been discontinued. You should upgrade, and read the current manual page.

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

DESCRIPTION
REFERENCES
SEE ALSO
AUTHOR

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.

AUTHOR

Margherita Di Leo

SOURCE CODE

Available at: i.sar.speckle source code (history)

Latest change: Thursday Feb 20 13:02:26 2025 in commit: 53de8196a10ba5a8a9121898ce87861d227137e3