NAME

       i.cca  - Canonical components analysis (CCA) program for image processing.

KEYWORDS

       imagery, statistics, CCA, canonical components analysis

SYNOPSIS

       i.cca
       i.cca --help
       i.cca   group=name   subgroup=name   signature=name  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:
       group=name [required]
           Name of input imagery group

       subgroup=name [required]
           Name of input imagery subgroup

       signature=name [required]
           File containing spectral signatures

       output=name [required]
           Output raster map prefix name

DESCRIPTION

       i.cca is an image processing program that takes from two to eight (raster) band  files  and  a  signature
       file, and outputs the same number of raster band files transformed to provide maximum separability of the
       categories  indicated  by the signatures.  This implementation of the canonical components transformation
       is based on the algorithm contained in the LAS image processing system. CCA is also known  as  "Canonical
       components transformation".

       Typically  the  user will use the g.gui.iclass program to collect a set of signatures and then pass those
       signatures along with the raster band files to i.cca.  The raster band file names are  specified  on  the
       command line by giving the group and subgroup that were used to collect the signatures.

       The  output  raster  map  names  are  built by appending a ".1", ".2", etc. to the output raster map name
       specified on the command line.

   Parameters:
       group=name
           Name of the imagery group to which the 2 to 8 raster band files used belong.

       subgroup=name
           Name of the imagery subgroup to which the 2 to 8 raster band files used belong.

       signature=name
           Name of an ASCII file containing spectral signatures.

       output=name
           Output raster map prefix name.  The output raster map layer names are  built  by  appending  a  ".1",
           ".2", etc. onto the output name specified by the user.

NOTES

       i.cca respects the current geographic region definition and the current mask setting while performing the
       transformation.

SEE ALSO

        g.gui.iclass, i.pca, r.covar, r.mapcalc

REFERENCES

       Schowengerdt,  Robert A.  Techniques for Image Processing and Classification in Remote Sensing,  Academic
       Press, 1983.

AUTHORS

       David Satnik, GIS Laboratory, Central Washington University
       Ali R. Vali, University of Texas

       Last changed: $Date: 2014-12-03 09:40:27 +0100 (Wed, 03 Dec 2014) $

       Main index | Imagery index | Topics index | Keywords index | Full index

       © 2003-2016 GRASS Development Team, GRASS GIS 7.0.3 Reference Manual

GRASS 7.0.3                                                                                        i.cca(1grass)