im_dE_fromLab(3) im_dE_fromLab(3)
NAME
im_dE_fromLab, im_dECMC_fromLab, im_dE00_fromLab - calculate colour
differences
SYNOPSIS
#include <vips/vips.h>
int im_dE_fromLab(in1, in2, out)
IMAGE *in1, *in2, *out;
int im_dECMC_fromLab(in1, in2, out)
IMAGE *in1, *in2, *out;
int im_dE00_fromLab(in1, in2, out)
IMAGE *in1, *in2, *out;
DESCRIPTION
Given a pair of images in Lab format, these functions calculate CIE76,
CMC(1:1) and CIEDE2000 colour difference images. These are the basic
colour difference calculators in VIPS --- other colour difference func-
tions, such as im_dE_fromXYZ(3), are provided as a convenience to the
programmer.
See im_Lab2XYZ(3) for an explanation of the various colour spaces VIPS
supports and how to convert between them.
RETURN VALUE
The functions return 0 on success and -1 on error.
SEE ALSO
im_col_XYZ2rgb(3), im_XYZ2rgb(3), im_dE_fromXYZ(3).
COPYRIGHT
National Gallery, 1990 - 1993
AUTHOR
J.Ph. Laurent - 2/12/1992
J. Cupitt - 21/7/93
2 December 1992 im_dE_fromLab(3)
im_dE_fromLab 7.14.5 - Generated Sat Sep 6 19:54:39 CDT 2008