sh2power

Synopsis

Compute the total power of a spherical harmonics image

Usage

sh2power [ options ]  SH power
  • SH: the input spherical harmonics coefficients image.
  • power: the output power image.

Description

This command computes the sum of squared SH coefficients, which equals the mean-squared amplitude of the spherical function it represents.

The spherical harmonic coefficients are stored according the conventions described the main documentation, which can be found at the following link: https://mrtrix.readthedocs.io/en/3.0_RC3/concepts/spherical_harmonics.html

Options

  • -spectrum output the power spectrum, i.e., the power contained within each harmonic degree (l=0, 2, 4, …) as a 4-D image.

Standard options

  • -info display information messages.
  • -quiet do not display information messages or progress status; alternatively, this can be achieved by setting the MRTRIX_QUIET environment variable to a non-empty string.
  • -debug display debugging messages.
  • -force force overwrite of output files (caution: using the same file as input and output might cause unexpected behaviour).
  • -nthreads number use this number of threads in multi-threaded applications (set to 0 to disable multi-threading).
  • -config key value (multiple uses permitted) temporarily set the value of an MRtrix config file entry.
  • -help display this information page and exit.
  • -version display version information and exit.

Author: J-Donald Tournier (jdtournier@gmail.com)

Copyright: Copyright (c) 2008-2019 the MRtrix3 contributors.

This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0. If a copy of the MPL was not distributed with this file, You can obtain one at http://mozilla.org/MPL/2.0/.

Covered Software is provided under this License on an “as is” basis, without warranty of any kind, either expressed, implied, or statutory, including, without limitation, warranties that the Covered Software is free of defects, merchantable, fit for a particular purpose or non-infringing. See the Mozilla Public License v. 2.0 for more details.

For more details, see http://www.mrtrix.org/.