NAME

     Lab_inv_xform - L*a*b* inverse transform

SYNOPSIS

     void Lab_inv_xform(float **cvecP, unsigned long vdim,  float
     Xo, float Yo, float Zo)

      <cvecP> - pointer to an array of normalized band vectors
      <vdim> - dimension of each vector (number of pixels)
      <Xo> - reference white for red
      <Yo> - reference white for green
      <Zo> - reference white for blue

PATH

     $CVIPHOME/COLOR/cxform.c

DESCRIPTION

     This function  performs  LAB  to  RGB  color  transformation
     according to the following equations:

      For X(r): X = pow(((a / 500) + (L + 16)/116), 3) * Xo
      For Y(g): Y = pow(((L + 16)/116), 3) * Yo
      For Z(b): Z = pow(((L + 16)/116 - (b / 200)), 3) * Zo

TYPES AND CONSTANTS

     None

RETURN VALUES

     None

HISTORY

     History information recorded: None

SEE ALSO

     libcolor

AUTHOR

     Copyright (C) 1996 SIUE - by Scott E. Umbaugh and Wenxng Li.