NAME

     combine2d - Combines multiple disparity  files  for  texture
     analysis

SYNOPSIS

     combine2d [ -N file_in_1  ]  [  [-N  file_in_2...]  ]  [  -O
     file_out  ]  [  -coarse  coarse  ] [ -halfwin halfwin ] [ [-
     sum|-max] ] [ -? ]

DESCRIPTION

     combine2d This utility reads  in  several  files  containing
     disparity  values  which  were  calculated from several dif-
     ferent data files.  The data files could, for instance, have
     been  a set frequencies from the spectral decomposition of a
     horizon.  Each disparity file was produced using the program
     disparity.   Each  disparity  file contains disparity values
     for each neighboring pair of label  sites.   The  output  of
     this utility is one disparity file which is the same size as
     the input files, i.e. it contains one value for each pair of
     neighbors  in the label lattice.  The value for each pair is
     either the  maximum  disparity  value  over  all  the  input
     disparity  values  for  the  pair  or  the  sum of the input
     disparity values for the pair.  NOTE:  At the present  time,
     a maximum of 60 input files can be processed by combine2d.

     combine2d gets all its parameters from  command  line  argu-
     ments.  These arguments specify the input, output, etc.

COMMAND LINE ARGUMENTS

     -N file_in_1 [-N file_in_2 ...]
          input files containing the disparity values  calculated
          from  the  first  data file.  This file was produced by
          the program disparity.

     -O file_out
          the output file which contains one disparity value  for
          each neighboring pair of labels (Default: stdout)

GENERAL OPTIONS

     -coarse coarseness
          inverse of the resolution at which the segmentation  is
          performed.   That  is,  the  ratio  of  the  number  of
          samples/traces in the data lattice  to  the  number  of
          samples/traces  in the label lattice.  The data lattice
          is the input to the program texture, and the label lat-
          tice  is  the  output  from any segmentation optimizer,
          such as bethe.  For highest resolution set the  coarse-
          ness to 1.  (Default: 9)

     -halfwin half_win_size
          half window width used to determine the  width  of  the
          texture  analysis  window  over  which  the  cdf's  are
          computed in the program disparity.  The  width  of  the
          texture analysis window is given by 2 * half_win_size +
          1.  (Default: 7)

     [-sum | -max]
          if the command line  switch  -sum  is  set  the  output
          disparity value for a pair of neighboring labels is the
          sum of the input disparity values for  that  pair.   If
          the  command line switch -max is set the output dispar-
          ity value for a pair of neighboring labels is the  max-
          imum  of  the  input  disparity  values  for that pair.
          NOTE:  both of these switches cannot be set on the same
          command  line.   If  neither  switch  is set the output
          value will be the sum of the input values.

     -h -? -help
          Help.

See Also

     texture2d, bethe2d,  cogeom2d,  disparity2d,  randomgraph2d,
     texstat2d, brightsizing

REFERENCES

     Crawford,  Kelly,  and  Marfurt,  Kurt,  1997.   2D  Texture
     Analysis:   A  User's  Guide, Amoco Geoscience Research Bul-
     letin F97-G-14.

     Hoelting, Cory and Kelly, Ken, 1996.   Texture  Analysis  of
     Spectral  Decomposition Data Using a Segmentation Algorithm,
     Amoco Geoscience Research Bulletin F96-G-21.

     Matheney, Mike and Kelly, Ken, 1995.  Texture-Based  Segmen-
     tation  of  3-D Seismic Data, Amoco Geoscience Research Bul-
     letin F95-G-29.

CONTRACT AGREEMENT

     This product is brought to you by  Research  Agreement  #548
     (The Seismic Coherency Cube). Thank you for your support!

AUTHOR

     Cory Hoelting and Ken Kelly (E&PTG, Tulsa, OK, USA).

COPYRIGHT

     copyright 2001, Amoco Production Company
               All Rights Reserved
          an affiliate of BP America Inc.