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im_dE_fromLab

im_dE_fromLab

Section: C Library Functions (3) Updated: 2 December 1992
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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 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.

 

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


 

Index

NAME
SYNOPSIS
DESCRIPTION
RETURN VALUE
SEE ALSO
COPYRIGHT
AUTHOR

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