NAME

       average_images - Average images

SYNOPSIS

       average_images [options] image0 ...

DESCRIPTION

       This  tool  computes pixelwiase average, variance, standard deviation, z-score, or entropy
       images from a list of user-provided intensity images.

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
       --mode
            Mode of averaging  operation  Supported  values:  "avg",  "var",  "stdev",  "zscore",
            "entropy", where the default is "avg", or use one of the following:

            --avg
                 Compute average (i.e., mean) image [This is the default]

            --var
                 Compute variance image

            --stdev
                 Compute standard deviation image

            --zscore
                 Compute z-score image

            --entropy
                 Compute pixel-by-pixel population entropy image

   Data Preprocessing
       --log, -l
            Apply log to input data

       --abs, -a
            Use absolute input values

       --normalize-mean-stdev, -n
            Normalize image intensities using means and standard deviations

       --set-padding-value <double>
            Define padding value in input images [Default: disabled]

   Output Options
       --outfile-name <string>, -o <string>
            Output file name [Default: average.nii ]

       --type
            Scalar  data  type  of  output image.  Supported values: "float", "double", where the
            default is "float", or use one of the following:

            --float
                 Single-precision float.  [This is the default]

            --double
                 Double-precision float.

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.