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]

Name of raster maps to be analyzed

suffix=string

Suffix for output maps

Default: match

output=name

Name for mosaic output map

database=name

Name of database

Default: $GISDBASE/$LOCATION_NAME/$MAPSET/histo.db

max=integer

Number of the maximum value for raster maps

Default: 255

# create the output with histogram matching
i.histo.match input=lsat5_1987_10,lsat7_2000_10

# set grey color to the new maps
r.colors map=lsat5_1987_10.match color=grey
r.colors map=lsat7_2000_10.match color=grey

# visualize and compare the results