1im_dE_fromLab(3)           Library Functions Manual           im_dE_fromLab(3)
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NAME

6       im_dE_fromLab,  im_dECMC_fromLab,  im_dE00_fromLab  -  calculate colour
7       differences
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SYNOPSIS

10       #include <vips/vips.h>
11       #include <vips/colour.h>
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13       int im_dE_fromLab(in1, in2, out)
14       IMAGE *in1, *in2, *out;
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16       int im_dECMC_fromLab(in1, in2, out)
17       IMAGE *in1, *in2, *out;
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19       int im_dE00_fromLab(in1, in2, out)
20       IMAGE *in1, *in2, *out;
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DESCRIPTION

24       Given a pair of images in Lab format, these functions calculate  CIE76,
25       CMC(1:1)  and  CIEDE2000 colour difference images.  These are the basic
26       colour difference calculators in VIPS --- other colour difference func‐
27       tions,  such  as im_dE_fromXYZ(3), are provided as a convenience to the
28       programmer.
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30       See im_Lab2XYZ(3) for an explanation of the various colour spaces  VIPS
31       supports and how to convert between them.
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RETURN VALUE

35       The functions return 0 on success and -1 on error.
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SEE ALSO

38       im_col_XYZ2rgb(3), im_XYZ2rgb(3), im_dE_fromXYZ(3).
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41       National Gallery, 1990 - 1993
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AUTHOR

44       J.Ph. Laurent - 2/12/1992
45       J. Cupitt - 21/7/93
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50                                2 December 1992               im_dE_fromLab(3)
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