libvips/man/im_Lab2UCS.3

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.TH IM_LAB2UCS 3 "2 December 1992"
.SH NAME
im_Lab2UCS, im_LabQ2XYZ, im_UCS2Lab, im_Lab2disp, im_disp2Lab, im_UCS2XYZ,
im_XYZ2UCS \- derived colour space conversion functions
.SH SYNOPSIS
#include <vips/vips.h>
int im_Lab2UCS(in, out)
.br
IMAGE *in, *out;
int im_LabQ2XYZ(in, out)
.br
IMAGE *in, *out;
int im_UCS2Lab(in, out)
.br
IMAGE *in, *out;
int im_Lab2disp(in, out, display)
.br
IMAGE *in, *out;
.br
struct im_col_display *display;
int im_disp2Lab(in, out, display)
.br
IMAGE *in, *out;
.br
struct im_col_display *display;
int im_UCS2XYZ(in, out)
.br
IMAGE *in, *out;
int im_XYZ2UCS(in, out)
.br
IMAGE *in, *out;
.SH DESCRIPTION
These functions are built on the basic VIPS colour space transformations as a
convenience for the programmer. See im_Lab2XYZ(3) for an explanation of the
colour spaces and the basic conversion functions.
im_Lab2UCS(3), for example, is defined as:
int
im_Lab2UCS( IMAGE *in, IMAGE *out )
{
IMAGE *t1 = im_open_local( out,
"im_Lab2UCS intermediate", "p" );
if( !t1 ||
im_Lab2LCh( in, t1 ) ||
im_LCh2UCS( t1, out ) )
return( -1 );
return( 0 );
}
.SH RETURN VALUE
The functions return 0 on success and -1 on error.
.SH SEE ALSO
im_col_XYZ2rgb(3), im_dE_fromLab(3), im_LabQ2Lab(3), im_Lab2disp(3).
.SH COPYRIGHT
National Gallery and Birkbeck College, 1990 - 1993
.SH AUTHOR
K. Martinez \- 2/12/1992
.br
J. Cupitt \- 21/7/93