im_lab2ucs(3)

NAME

im_Lab2UCS, im_LabQ2XYZ, im_UCS2Lab, im_Lab2disp, im_disp2Lab, im_UCS2XYZ, im_XYZ2UCS - derived colour space conversion functions

SYNOPSIS

#include <vips/vips.h>
int im_Lab2UCS(in, out)
IMAGE *in, *out;
int im_LabQ2XYZ(in, out)
IMAGE *in, *out;
int im_UCS2Lab(in, out)
IMAGE *in, *out;
int im_Lab2disp(in, out, display)
IMAGE *in, *out;
struct im_col_display *display;
int im_disp2Lab(in, out, display)
IMAGE *in, *out;
struct im_col_display *display;
int im_UCS2XYZ(in, out)
IMAGE *in, *out;
int im_XYZ2UCS(in, out)
IMAGE *in, *out;

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 );

}

RETURN VALUE

The functions return 0 on success and -1 on error.

SEE ALSO

im_col_XYZ2rgb(3), im_dE_fromLab(3), im_LabQ2Lab(3), im_Lab2disp(3).

COPYRIGHT

National Gallery and Birkbeck College, 1990 - 1993

AUTHOR

K. Martinez - 2/12/1992
J. Cupitt - 21/7/93

2 December 1992 IM_LAB2UCS(3)