| /* Derived colour space functions. |
| * |
| * 14/9/95 JC |
| * - horrible error killed im_dE_fromXYZ() and im_dE_fromdisp() |
| * 4/3/98 JC |
| * - sRGB added |
| * 17/6/99 JC |
| * - minor reformatting |
| * 30/10/09 |
| * - gtkdoc comments |
| * - minor cleanups |
| */ |
| |
| /* |
| |
| This file is part of VIPS. |
| |
| VIPS is free software; you can redistribute it and/or modify |
| it under the terms of the GNU Lesser General Public License as published by |
| the Free Software Foundation; either version 2 of the License, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public License |
| along with this program; if not, write to the Free Software |
| Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| |
| */ |
| |
| /* |
| |
| These files are distributed with VIPS - http://www.vips.ecs.soton.ac.uk |
| |
| */ |
| |
| #ifdef HAVE_CONFIG_H |
| #include <config.h> |
| #endif /*HAVE_CONFIG_H*/ |
| #include <vips/intl.h> |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| |
| #include <vips/vips.h> |
| |
| #ifdef WITH_DMALLOC |
| #include <dmalloc.h> |
| #endif /*WITH_DMALLOC*/ |
| |
| /** |
| * im_LabQ2XYZ: |
| * @in: input image |
| * @out: output image |
| * |
| * Convert an image from LabQ (Coding == IM_CODING_LABQ) to XYZ. |
| * |
| * Returns: 0 on success, -1 on error. |
| */ |
| int |
| im_LabQ2XYZ( IMAGE *in, IMAGE *out ) |
| { |
| IMAGE *t[1]; |
| |
| if( im_open_local_array( out, t, 1, "im_LabQ2XYZ:1", "p" ) || |
| im_LabQ2Lab( in, t[0] ) || |
| im_Lab2XYZ( t[0], out ) ) |
| return( -1 ); |
| |
| return( 0 ); |
| } |
| |
| /** |
| * im_Lab2UCS: |
| * @in: input image |
| * @out: output image |
| * |
| * Convert an image from Lab to UCS. |
| * |
| * Returns: 0 on success, -1 on error. |
| */ |
| int |
| im_Lab2UCS( IMAGE *in, IMAGE *out ) |
| { |
| IMAGE *t[1]; |
| |
| if( im_open_local_array( out, t, 1, "im_Lab2UCS:1", "p" ) || |
| im_Lab2LCh( in, t[0] ) || |
| im_LCh2UCS( t[0], out ) ) |
| return( -1 ); |
| |
| return( 0 ); |
| } |
| |
| /** |
| * im_UCS2Lab: |
| * @in: input image |
| * @out: output image |
| * |
| * Convert an image from UCS to Lab. |
| * |
| * Returns: 0 on success, -1 on error. |
| */ |
| int |
| im_UCS2Lab( IMAGE *in, IMAGE *out ) |
| { |
| IMAGE *t[1]; |
| |
| if( im_open_local_array( out, t, 1, "im_UCS2Lab:1", "p" ) || |
| im_UCS2LCh( in, t[0] ) || |
| im_LCh2Lab( t[0], out ) ) |
| return( -1 ); |
| |
| return( 0 ); |
| } |
| |
| /** |
| * im_UCS2XYZ: |
| * @in: input image |
| * @out: output image |
| * |
| * Convert an image from UCS to XYZ. |
| * |
| * Returns: 0 on success, -1 on error. |
| */ |
| int |
| im_UCS2XYZ( IMAGE *in, IMAGE *out ) |
| { |
| IMAGE *t[1]; |
| |
| if( im_open_local_array( out, t, 1, "im_UCS2XYZ:1", "p" ) || |
| im_UCS2Lab( in, t[0] ) || |
| im_Lab2XYZ( t[0], out ) ) |
| return( -1 ); |
| |
| return( 0 ); |
| } |
| |
| |
| /** |
| * im_XY2UCS: |
| * @in: input image |
| * @out: output image |
| * |
| * Convert an image from XYZ to UCS. |
| * |
| * Returns: 0 on success, -1 on error. |
| */ |
| int |
| im_XYZ2UCS( IMAGE *in, IMAGE *out ) |
| { |
| IMAGE *t[1]; |
| |
| if( im_open_local_array( out, t, 1, "im_XYZ2UCS:1", "p" ) || |
| im_XYZ2Lab( in, t[0] ) || |
| im_Lab2UCS( t[0], out ) ) |
| return( -1 ); |
| |
| return( 0 ); |
| } |
| |
| /** |
| * im_XYZ2sRGB: |
| * @in: input image |
| * @out: output image |
| * |
| * Convert an image from XYZ to sRGB. The conversion is supposed to be quick |
| * rather than accurate. Use an ICC profile with im_icc_transform() for more |
| * precision. |
| * |
| * See also: im_icc_transform. |
| * |
| * Returns: 0 on success, -1 on error. |
| */ |
| int |
| im_XYZ2sRGB( IMAGE *in, IMAGE *out ) |
| { |
| if( im_XYZ2disp( in, out, im_col_displays( 7 ) ) ) |
| return( -1 ); |
| |
| out->Type = IM_TYPE_sRGB; |
| |
| return( 0 ); |
| } |
| |
| /** |
| * im_sRGB2XYZ: |
| * @in: input image |
| * @out: output image |
| * |
| * Convert an image from sRGB to XYZ. |
| * The conversion is supposed to be quick |
| * rather than accurate. Use an ICC profile with im_icc_transform() for more |
| * precision. |
| * |
| * See also: im_icc_transform. |
| * |
| * Returns: 0 on success, -1 on error. |
| */ |
| int |
| im_sRGB2XYZ( IMAGE *in, IMAGE *out ) |
| { |
| if( im_disp2XYZ( in, out, im_col_displays( 7 ) ) ) |
| return( -1 ); |
| |
| return( 0 ); |
| } |
| |
| /** |
| * im_dE_fromXYZ: |
| * @in1: first input image |
| * @in2: second input image |
| * @out: output image |
| * |
| * Calculate CIELAB dE 1976 from a pair of XYZ images. |
| * |
| * Returns: 0 on success, -1 on error. |
| */ |
| int |
| im_dE_fromXYZ( IMAGE *in1, IMAGE *in2, IMAGE *out ) |
| { |
| IMAGE *t[2]; |
| |
| if( im_open_local_array( out, t, 2, "im_dE_fromXYZ:1", "p" ) || |
| im_XYZ2Lab( in1, t[0] ) || |
| im_XYZ2Lab( in2, t[1] ) || |
| im_dE_fromLab( t[0], t[1], out ) ) |
| return( -1 ); |
| |
| return( 0 ); |
| } |