| .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 |
