Help for ZRELAX

PURPOSE

   "zrelax" adjusts the brightness of images in a path-row arrangement
so that brightness differences with neighbors are minimized.


EXECUTION

     zrelax ibisfile cols=(c1,c2,c3,c4,c5,c6,c7,c8,c9,c10)

   the ibisfile must contain ten columns with the following data:

c1.  frame index (usually path*100+row)
c2.  average z value for the c1 frame vs a neighbor frame
c3.  path of neighbor
c4.  row of neighbor
c5.  average z value of neighbor vs the c1 frame
c6.  delta z from the c1 frame to the neighbor frame
c7.  weighted average z value of the c1 frame to all neighbors
c8.  (output) the c7 value after the relaxation adjustment
c9.  (output) the c2 value after the relaxation adjustment
c10  (output) the c5 value after the relaxation adjustment


RESTRICTIONS

The file must be sorted on column 1.  There are several entries in column 1
for each neighbor of a frame.

Original Programmer: A. L. Zobrist, 05 Aug, 2003
Current Cognizant Programmer: A. L. Zobrist
Revisions:
  Fri Dec 28 2007 wlb switched to USES_ANSI_C AND LIB_CARTO; misc cleanup
  2022-07-27 B. Crocco afids to opensource (untested)
  

PARAMETERS: