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