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.