## 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.