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g.gui.iclass(1)		    GRASS GIS User's Manual	       g.gui.iclass(1)

NAME
       g.gui.iclass  - Tool for	supervised classification of imagery data.
       Generates spectral signatures for an image by allowing the user to out-
       line regions of interest.

KEYWORDS
       general,	GUI, classification, supervised	classification,	signatures

SYNOPSIS
       g.gui.iclass
       g.gui.iclass --help
       g.gui.iclass   [-m]    [group=name]     [subgroup=name]	    [map=name]
       [trainingmap=name]   [--help]  [--verbose]  [--quiet]  [--ui]

   Flags:
       -m
	   Maximize window

       --help
	   Print usage summary

       --verbose
	   Verbose module output

       --quiet
	   Quiet module	output

       --ui
	   Force launching GUI dialog

   Parameters:
       group=name
	   Name	of input imagery group

       subgroup=name
	   Name	of input imagery subgroup

       map=name
	   Name	of raster map to load

       trainingmap=name
	   Ground truth	training map to	load

KEYWORDS
       display,	GUI, imagery, classification, supervised classification

DESCRIPTION
       Supervised  Classification  Tool	 (wxIClass) is a wxGUI compoment which
       allows the user to create training areas	and generate  spectral	signa-
       tures.	The resulting signature	file can be used as input for i.maxlik
       or as a seed signature file for i.cluster.  WxIClass  can  be  launched
       from  the Layer Manager menu Imagery _a Classify image _a Interactive in-
       put for supervised classification or via	command	line as	g.gui.iclass.

       wxIClass	currently allows you to:

	   o   create training areas (using customized vector digitizer)

	   o   show histograms for each	band and class (category)

	   o   show coincidence	plots for each band

	   o   show raster cells that match training areas (within the	number
	       of standard deviations specified)

	   o   specify color of	class

	   o   write signature file

	   o   import vector map

	   o   export vector map with attribute	table

       wxIClass	performs the first pass	in the GRASS two-pass supervised image
       classification process; the GRASS module	i.maxlik executes  the	second
       pass.   Both programs must be run to generate a classified map in GRASS
       raster format.

       wxIClass	is an interactive program that allows the user to create  mul-
       tiple  training	areas  for multiple classes and	calculate the spectral
       signatures based	on the cells that are within the training areas.  Dur-
       ing this	process	the user will be shown histograms for each image band.
       The user	can also display the cells  of	the  image  bands  which  fall
       within a	user-specified number of standard deviations from the means in
       the spectral signature.	By doing this, the user	can see	 how  much  of
       the image is likely to be put into the class associated with the	signa-
       ture.

       The spectral signatures are composed of region means and	covariance ma-
       trices.	 These	region	means  and covariance matrices are used	in the
       second pass (i.maxlik) to classify the image.

       Alternatively, the spectral signatures generated	 by  wxIClass  can  be
       used for	seed means for the clusters in i.cluster.

SEE ALSO
	wxGUI
       wxGUI components, Interactive Scatter Plot Tool

       See also	user wiki page and development page.

AUTHOR
       Anna  Kratochvilova, Czech Technical University in Prague, Czech	Repub-
       lic
       Vaclav Petras, Czech Technical University in Prague, Czech Republic

SOURCE CODE
       Available at: wxGUI Supervised Classification Tool  source  code	 (his-
       tory)

       Main  index | GUI index | Topics	index |	Keywords index | Graphical in-
       dex | Full index

       A(C) 2003-2020 GRASS Development	Team, GRASS GIS	7.8.4 Reference	Manual

GRASS 7.8.4						       g.gui.iclass(1)

NAME | KEYWORDS | SYNOPSIS | KEYWORDS | DESCRIPTION | SEE ALSO | AUTHOR | SOURCE CODE

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