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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.

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

Table of contents

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.

SEE ALSO

r.hants, i.lmf

AUTHOR

Yann Chemin, International Water Management Institute

SOURCE CODE

Available at: i.wavelet source code (history)

Latest change: Monday Jan 30 19:52:26 2023 in commit: cac8d9d848299297977d1315b7e90cc3f7698730

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.

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