average_images(1) 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

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.