Help for RGB2ISH

PURPOSE

     RGB2ISH converts between RGB and ISH.

  1) Reads byte, half or full word VICAR image
  2) Writes same, with RGB/ISH conversion
  3) Conversion direction depends on "reverse" parm
  4) Negative values can be set to zero

TAE COMMAND LINE FORMAT

     rgb2ish INP=(I1,I2,I3) OUT=(O1,O2,O3) PARMS
     
     where

     I1,I2,I3   are VICAR input images
     O1,O2,O3   are VICAR output images

       reverse if 0 (default), converts rgb to ish else ish to rgb
       noneg if non-zero (default), replaces negative values with zero

     Examples

     rgb2ish INP=(r,g,b) OUT=(i,s,h)

     rgb2ish INP=(i,s,h) OUT=(r,g,b) reverse=1

OPERATION

     RGB2ISH converts between RGB and ISH, performing the conversion
     in double values. Negative input values are not allowed.
     Input images must be either all byte or all half word.
   

RESTRICTIONS

     None known.

WRITTEN BY:            W. L. Bunch

COGNIZANT PROGRAMMER:  W. L. Bunch, R. Nathan

REVISIONS: 
  2002-03-25 WLB Initial version.
  2008-11-05 WLB Updated to ANSI-C.
  2016-09-12 WLB Migrated to MIPL, removed format parm, rewrote algorithm.

PARAMETERS: