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.

CMTK 3.3.1p2                                       Feb 26 2025                                         filter(1)