This function implements the Regular Value of the Differences method [1],
  only on a pixel-by time, with the normalization of the co-occurrence matrix (COM) 
  proposed by CARDOSO, R.R. et al. [2].

  Use as input data a 3D matrix created grouping NTIMES intensity matrices I(k)
  1<=k<=NTIMES

  I(k)=DATA(:,:,k)

  $GRVD=\frac{1}{NTIMES-1}\sum\limits_{k=1}^{NTIMES-1} (I(k)-I(k+1))$


  References:
  [1]  Pujaico Rivera Fernando. Paper coming soon.
  [2]  CARDOSO, R.R.; BRAGA R.A. Enhancement of the robustness on dynamic speckle 
       laser numerical analysis. Optics and Lasers in Engineering, 
       63(Complete):19-24, 2014.


  After starting the main routine just type the following command at the
  prompt:
  GRVD = graphrvd(DATA);
    
  Input:
  DATA is the speckle data pack. Where DATA is a 3D matrix created grouping NTIMES 
       intensity matrices with NLIN lines and NCOL columns. When N=size(DATA), then
       N(1,1) represents NLIN and
       N(1,2) represents NCOL and
       N(1,3) represents NTIMES.
  SHOW [Optional] If SHOW is equal to string 'off', then do not plot the result.

  Output:
  GRVD returns the GRVD matrix.


  For help, bug reports and feature suggestions, please visit:
  http://nongnu.org/bsltl

Package: bsltl