SHCoefficientsToGFA
===================

.. code-block:: none

  
  USAGE: 
  
     SHCoefficientsToGFA  [--returnparameterfile <std::string>]
                          [--processinformationaddress <std::string>] [--xml]
                          [--echo] [--debug] [--power <double>] [--]
                          [--version] [-h] <std::string> <std::string>
  
  
  Where: 
  
     --returnparameterfile <std::string>
       Filename in which to write simple return parameters (int, float,
       int-vector, etc.) as opposed to bulk return parameters (image,
       geometry, transform, measurement, table).
  
     --processinformationaddress <std::string>
       Address of a structure to store process information (progress, abort,
       etc.). (value: 0)
  
     --xml
       Produce xml description of command line arguments (value: 0)
  
     --echo
       Echo the command line arguments (value: 0)
  
     --debug
       debug (value: 0)
  
     --power <double>
       Power argument. If the power is 2, we have closed form. For other
       power number, we use a numerical fitting of the powered spherical
       function. (value: 1)
  
     --,  --ignore_rest
       Ignores the rest of the labeled arguments following this flag.
  
     --version
       Displays version information and exits.
  
     -h,  --help
       Displays usage information and exits.
  
     <std::string>
       (required)  Input image file where each voxel contains a vector of SH
       coefficients.
  
     <std::string>
       (required)  Output image file where each voxel contains a scalar GFA.
  
  
     Description: calculate GFA from SH coefficients.
  
     Examples: 
  
     SHCoefficientsToGFA eap_r0.015.nii.gz eap_r0.015_gfa.nii.gz 
  
     Reference: 
  
     Tuch, David S. 'Q‐ball imaging.' Magnetic resonance in medicine 52.6
     (2004): 1358-1372. 
  
     Descoteaux, Maxime, Elaine Angelino, Shaun Fitzgibbons, and Rachid
     Deriche. 'Regularized, fast, and robust analytical Q‐ball imaging',
     Magnetic resonance in medicine 58, no. 3 (2007): 497-510.
  
     Author(s): Jian Cheng (jian.cheng.1983@gmail.com)
  
     Acknowledgements: Thank you everyone.