i.wavelet - GRASS GIS manual

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

Note: This addon document is for an older version of GRASS GIS that will be discontinued soon. You should upgrade your GRASS GIS installation, and read the current addon manual page.

NAME

i.wavelet - Decompostion/Recomposition in temporal dimension using wavelets

KEYWORDS

imagery, wavelet, fusion

SYNOPSIS

i.wavelet

i.wavelet --help

i.wavelet [-iHD] [input_group_to_decompose=name] [output_lp1_from_decomposition=name] [output_lp2_from_decomposition=name] [output_hp1_from_decomposition=name] [output_hp2_from_decomposition=name] [input_lp2_group_for_recomposition=name] [input_hp1_group_for_recomposition=name] [input_hp2_group_for_recomposition=name] [output_from_recomposition=name] [wavelet_sample_rate=integer] [--overwrite] [--help] [--verbose] [--quiet] [--ui]

Flags:

-i: Recomposition (Default: Decomposition)
-H: Use Haar wavelets
-D: Use Daubechies wavelets (specify resolution=4,6,8,10,12,14,16,18,20
--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_group_to_decompose=name: Name of input imagery group
output_lp1_from_decomposition=name: Name for output raster map
output_lp2_from_decomposition=name: Name for output raster map
output_hp1_from_decomposition=name: Name for output raster map
output_hp2_from_decomposition=name: Name for output raster map
input_lp2_group_for_recomposition=name: Name of input imagery group
input_hp1_group_for_recomposition=name: Name of input imagery group
input_hp2_group_for_recomposition=name: Name of input imagery group
output_from_recomposition=name: Name of input raster map
wavelet_sample_rate=integer: 4,6,8,10,12,14,16,18,20

DESCRIPTION
NOTES
TODO
SEE ALSO
AUTHORS

DESCRIPTION

i.wavelet Decomposes the time-series with the requested wavelet. The output will have 4 components, High-Pass Level 1 and 2, Low-Pass Level 1 and 2. Low Pass Level 1 can be recomposed using HP2 and LP2 using the recomposition mode.
This module is designed to make a temporal fusion from multi-sources.

NOTES

TODO

More wavelet families to be included.

AUTHORS

Yann Chemin, International Water Management Institute

SOURCE CODE

Available at: i.wavelet source code (history)

Latest change: Monday Jun 28 07:54:09 2021 in commit: 1cfc0af029a35a5d6c7dae5ca7204d0eb85dbc55