NAME

       filter - Filter a volume image

SYNOPSIS

       filter  [options]  input  output  filter  [options]  [-s,--studholme] input output average
       subject img0 [img1...]  filter [options] [-R,--rohlfing] input output subject

DESCRIPTION

       This tool applies spatial filtering  operators,  including  cnotent-sensitive  opersators,
       based on selective Gaussian kernels.

OPTIONS

   Global Toolkit Options (these are shared by all CMTK tools)
       --help
            Write list of basic command line options to standard output.

       --help-all
            Write complete list of basic and advanced command line options to standard output.

       --wiki
            Write list of command line options to standard output in MediaWiki markup.

       --man
            Write man page source in 'nroff' markup to standard output.

       --version
            Write toolkit version to standard output.

       --echo
            Write the current command line to standard output.

       --verbose-level <integer>
            Set verbosity level.

       --verbose, -v
            Increment verbosity level by 1 (deprecated; supported for backward compatibility).

       --threads <integer>
            Set maximum number of parallel threads (for POSIX threads and OpenMP).

   Main Options
       --gaussian <float>, -g <float>
            Gaussian filter width (sigma) [Default: disabled]

       --radius <float>, -r <float>
            Filter radius (truncated outside) [Default: 2]

       --mask <string>, -m <string>
            Binary mask file name [Default: NONE]

       --studholme, -s
            Use Studholme's consistent filtering

       --bin-width <float>, -b <float>
            Intensity bin width for consistent filtering [Default: 10]

       --rohlfing, -R
            Use Rohlfing's single-image consistent filtering

       --intensity-gaussian <float>, -G <float>
            Intensity gaussian sigma for consistent filtering [Default: 0]

   Image/Transformation Database
       --db <string>
            Path  to  image/transformation database that should be updated with the newly created
            image.  [Default: NONE]

AUTHORS

       Torsten Rohlfing, with contributions from Michael  P.  Hasak,  Greg  Jefferis,  Calvin  R.
       Maurer, Daniel B. Russakoff, and Yaroslav Halchenko

LICENSE

       http://www.fsf.org/licensing/licenses/gpl.html

BUGS

       Report bugs at http://nitrc.org/projects/cmtk/

ACKNOWLEDGMENTS

       CMTK is developed with support from the NIAAA under Grant AA021697, National Consortium on
       Alcohol and Neurodevelopment in Adolescence (N-CANDA): Data  Integration  Component.  From
       April  2009  through September 2011, CMTK development and maintenance was supported by the
       NIBIB under Grant EB008381.