| .TH im_dE_fromLab 3 "2 December 1992" |
| .SH NAME |
| im_dE_fromLab, im_dECMC_fromLab, im_dE00_fromLab \- calculate colour differences |
| .SH SYNOPSIS |
| #include <vips/vips.h> |
| |
| int im_dE_fromLab(in1, in2, out) |
| .br |
| IMAGE *in1, *in2, *out; |
| |
| int im_dECMC_fromLab(in1, in2, out) |
| .br |
| IMAGE *in1, *in2, *out; |
| |
| int im_dE00_fromLab(in1, in2, out) |
| .br |
| IMAGE *in1, *in2, *out; |
| |
| .SH 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 |
| .B im_dE_fromXYZ(3), |
| are provided as a convenience to the programmer. |
| |
| See |
| .B im_Lab2XYZ(3) |
| for an explanation of the various colour spaces VIPS |
| supports and how to convert between them. |
| |
| .SH RETURN VALUE |
| The functions return 0 on success and -1 on error. |
| .SH SEE ALSO |
| im_col_XYZ2rgb(3), im_XYZ2rgb(3), im_dE_fromXYZ(3). |
| .SH COPYRIGHT |
| National Gallery, 1990 - 1993 |
| .SH AUTHOR |
| J.Ph. Laurent \- 2/12/1992 |
| .br |
| J. Cupitt \- 21/7/93 |
| |
