.TH i.rgb.his 1grass "" "GRASS 7.8.5" "GRASS GIS User's Manual"
.SH NAME
\fI\fBi.rgb.his\fR\fR  \- Transforms raster maps from RGB (Red\-Green\-Blue) color space to HIS (Hue\-Intensity\-Saturation) color space.
.SH KEYWORDS
imagery, color transformation, RGB, HIS, IHS
.SH SYNOPSIS
\fBi.rgb.his\fR
.br
\fBi.rgb.his \-\-help\fR
.br
\fBi.rgb.his\fR \fBred\fR=\fIname\fR \fBgreen\fR=\fIname\fR \fBblue\fR=\fIname\fR \fBhue\fR=\fIname\fR \fBintensity\fR=\fIname\fR \fBsaturation\fR=\fIname\fR  [\-\-\fBoverwrite\fR]  [\-\-\fBhelp\fR]  [\-\-\fBverbose\fR]  [\-\-\fBquiet\fR]  [\-\-\fBui\fR]
.SS Flags:
.IP "\fB\-\-overwrite\fR" 4m
.br
Allow output files to overwrite existing files
.IP "\fB\-\-help\fR" 4m
.br
Print usage summary
.IP "\fB\-\-verbose\fR" 4m
.br
Verbose module output
.IP "\fB\-\-quiet\fR" 4m
.br
Quiet module output
.IP "\fB\-\-ui\fR" 4m
.br
Force launching GUI dialog
.SS Parameters:
.IP "\fBred\fR=\fIname\fR \fB[required]\fR" 4m
.br
Name of input raster map (red)
.IP "\fBgreen\fR=\fIname\fR \fB[required]\fR" 4m
.br
Name of input raster map (green)
.IP "\fBblue\fR=\fIname\fR \fB[required]\fR" 4m
.br
Name of input raster map (blue)
.IP "\fBhue\fR=\fIname\fR \fB[required]\fR" 4m
.br
Name for output raster map (hue)
.IP "\fBintensity\fR=\fIname\fR \fB[required]\fR" 4m
.br
Name for output raster map (intensity)
.IP "\fBsaturation\fR=\fIname\fR \fB[required]\fR" 4m
.br
Name for output raster map (saturation)
.SH DESCRIPTION
\fIi.rgb.his\fR is an image processing program that
processes three input raster map layers as red, green, and
blue components and produces three output raster map layers
representing the hue, intensity, and saturation of the
data.  The output raster map layers are created by a
standard red\-green\-blue (RGB) to hue\-intensity\-saturation
(HIS) color transformation.  Each output raster map layer
is given a linear gray scale color table.  The current
geographic region definition and mask settings are
respected.
.SH SEE ALSO
\fIi.his.rgb\fR
.SH AUTHOR
David Satnik, GIS Laboratory,
Central Washington University,
.br
with acknowledgements to Ali Vali, Space Research
Center, for the core routine.
.SH SOURCE CODE
.PP
Available at: i.rgb.his source code (history)
.PP
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© 2003\-2020
GRASS Development Team,
GRASS GIS 7.8.5 Reference Manual