Scroll to navigation

sbai(1) The Computational Morphometry Toolkit sbai(1)


sbai - Shape-Based Averaging and interpolation of label images


sbai InputImageVector


Average segmentations (label fields) using the Euclidean Distance Transform. This tool performs joint interpolation and averaging by interpolating from the EDT. This requires that the inputs are transformations from the same fixed to (not necessarily) different moving images. EDT computation is done in the space of each moving image. See for details of the underlying algorithm.


Global Toolkit Options (these are shared by all CMTK tools)

Write list of basic command line options to standard output.
Write complete list of basic and advanced command line options to standard output.
Write list of command line options to standard output in MediaWiki markup.
Write man page source in 'nroff' markup to standard output.
Write toolkit version to standard output.
Write the current command line to standard output.
Set verbosity level.
Increment verbosity level by 1 (deprecated; supported for backward compatibility).
Set maximum number of parallel threads (for POSIX threads and OpenMP).

Input Options

Number of labels. It is assumed that only values [0..num] occur in the images [Default: 0]
Padding value in input image [Default: disabled]
Replace from pattern
Replace to pattern

Output Options

File name for output segmentation file. [Default: sbai.nii ]


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



Report bugs at


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.

Jun 6 2022 CMTK 3.3.1p2