NAME
i.lmf - Performs Temporal Local Maximum Fitting of vegetation indices, works also for surface reflectance data.
KEYWORDS
imagery,
LMF,
Vegetation Indices,
Atmospheric correction,
Temporal
SYNOPSIS
i.lmf
i.lmf --help
i.lmf input=name[,name,...] ndate=integer output=name [--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[,name,...] [required]
- Names of input layers
- ndate=integer [required]
- Number of map layers per year
- output=name [required]
- Name of the output layer
i.lmf calculates the Local maximum fitting of a temporal image series,
intially for vegetation indices, it also works for surface reflectance.
This is a first level port, only a fast fitting is done, see TODO.
The number of bands is potentially several years, nfiles and ndates
are respectively the number of pixels and the number of pixels in a year.
Original links are found here
SAWADA, 2001:
http://www.affrc.go.jp/ANDES/sawady/index.html
NAGATANI et al., 2002:
http://www.gisdevelopment.net/aars/acrs/2002/pos2/184.pdf
Yann Chemin and Kiyoshi Honda repaired it and ported it from SGI/OpenMP to Linux.
http://www.rsgis.ait.ac.th/~honda/lmf/lmf.html
Port the full detailed algorithm from Fortran, and vastly unemcomber/clean it.
It will make the algorithm must slower though, gaining only a marginal fitting
strength, for my actual experience with VIs curves.
r.series
Yann Chemin, International Rice Research Institute, The Philippines
SOURCE CODE
Available at:
i.lmf source code
(history)
Latest change: Monday Jan 30 19:49:11 2023 in commit: 5fb6b1a969e72db28df78483d3360b15a17f0c68
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GRASS Development Team,
GRASS GIS 8.4.1dev Reference Manual