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im_dE_fromLab, im_dECMC_fromLab, im_dE00_fromLab - calculate colour
differences
#include <vips/vips.h>
#include <vips/colour.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;
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 functions, 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.
The functions return 0 on success and -1 on error.
im_col_XYZ2rgb(3)
,
im_XYZ2rgb(3)
, im_dE_fromXYZ(3)
.
National Gallery, 1990 - 1993
J.Ph.
Laurent - 2/12/1992
J. Cupitt - 21/7/93
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