1 |
/* Copyright (c) 1995 Regents of the University of California */ |
2 |
|
3 |
#ifndef lint |
4 |
static char SCCSid[] = "$SunId$ LBL"; |
5 |
#endif |
6 |
|
7 |
/* |
8 |
* Calibrate a scanned MacBeth Color Checker Chart |
9 |
* |
10 |
* Produce a .cal file suitable for use with pcomb. |
11 |
*/ |
12 |
|
13 |
#include <stdio.h> |
14 |
#ifdef MSDOS |
15 |
#include <fcntl.h> |
16 |
#endif |
17 |
#include "color.h" |
18 |
#include "resolu.h" |
19 |
#include "pmap.h" |
20 |
|
21 |
/* MacBeth colors */ |
22 |
#define DarkSkin 0 |
23 |
#define LightSkin 1 |
24 |
#define BlueSky 2 |
25 |
#define Foliage 3 |
26 |
#define BlueFlower 4 |
27 |
#define BluishGreen 5 |
28 |
#define Orange 6 |
29 |
#define PurplishBlue 7 |
30 |
#define ModerateRed 8 |
31 |
#define Purple 9 |
32 |
#define YellowGreen 10 |
33 |
#define OrangeYellow 11 |
34 |
#define Blue 12 |
35 |
#define Green 13 |
36 |
#define Red 14 |
37 |
#define Yellow 15 |
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#define Magenta 16 |
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#define Cyan 17 |
40 |
#define White 18 |
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#define Neutral8 19 |
42 |
#define Neutral65 20 |
43 |
#define Neutral5 21 |
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#define Neutral35 22 |
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#define Black 23 |
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/* computed from 5nm spectral measurements */ |
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/* CIE 1931 2 degree obs, equal-energy white */ |
48 |
float mbxyY[24][3] = { |
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{0.462, 0.3769, 0.0932961}, /* DarkSkin */ |
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{0.4108, 0.3542, 0.410348}, /* LightSkin */ |
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{0.2626, 0.267, 0.181554}, /* BlueSky */ |
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{0.36, 0.4689, 0.108447}, /* Foliage */ |
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{0.2977, 0.2602, 0.248407}, /* BlueFlower */ |
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{0.2719, 0.3485, 0.401156}, /* BluishGreen */ |
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{0.52, 0.4197, 0.357899}, /* Orange */ |
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{0.229, 0.1866, 0.103911}, /* PurplishBlue */ |
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{0.4909, 0.3262, 0.242615}, /* ModerateRed */ |
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{0.3361, 0.2249, 0.0600102}, /* Purple */ |
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{0.3855, 0.4874, 0.42963}, /* YellowGreen */ |
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{0.4853, 0.4457, 0.476343}, /* OrangeYellow */ |
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{0.2026, 0.1369, 0.0529249}, /* Blue */ |
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{0.3007, 0.4822, 0.221226}, /* Green */ |
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{0.5805, 0.3238, 0.162167}, /* Red */ |
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{0.4617, 0.472, 0.64909}, /* Yellow */ |
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{0.4178, 0.2625, 0.233662}, /* Magenta */ |
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{0.2038, 0.2508, 0.167275}, /* Cyan */ |
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{0.3358, 0.337, 0.916877}, /* White */ |
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{0.3338, 0.3348, 0.604678}, /* Neutral.8 */ |
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{0.3333, 0.3349, 0.364566}, /* Neutral.65 */ |
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{0.3353, 0.3359, 0.200238}, /* Neutral.5 */ |
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{0.3363, 0.336, 0.0878721}, /* Neutral.35 */ |
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{0.3346, 0.3349, 0.0308383} /* Black */ |
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}; |
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|
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COLOR mbRGB[24]; /* MacBeth RGB values */ |
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|
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#define NMBNEU 6 /* Number of MacBeth neutral colors */ |
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short mbneu[NMBNEU] = {Black,Neutral35,Neutral5,Neutral65,Neutral8,White}; |
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|
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#define NMBMOD 16 /* Number of MacBeth unsaturated colors */ |
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short mbmod[NMBMOD] = { |
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DarkSkin,LightSkin,BlueSky,Foliage,BlueFlower,BluishGreen, |
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PurplishBlue,ModerateRed,YellowGreen,OrangeYellow, |
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Black,Neutral35,Neutral5,Neutral65,Neutral8,White |
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}; |
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|
87 |
#define NMBSAT 8 /* Number of MacBeth saturated colors */ |
88 |
short mbsat[NMBSAT] = { |
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Red,Green,Blue,Magenta,Yellow,Cyan, |
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Orange,Purple |
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}; |
92 |
|
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#define REQFLGS (1L<<White|1L<<Neutral8|1L<<Neutral65| \ |
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1L<<Neutral5|1L<<Neutral35|1L<<Black) |
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|
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#define CENTCVG 0.3 /* measured coverage of square sample */ |
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#define FULLCVG 0.9 /* coverage of entire square */ |
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|
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int xmax, ymax; /* input image dimensions */ |
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int bounds[4][2]; /* image coordinates of chart corners */ |
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double imgxfm[3][3]; /* coordinate transformation matrix */ |
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|
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COLOR inpRGB[24]; /* measured or scanned input colors */ |
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long inpflags = 0; /* flags of which colors were input */ |
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|
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COLOR bramp[NMBNEU][2]; /* brightness ramp (per primary) */ |
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double solmat[3][3]; /* color mapping matrix */ |
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|
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FILE *debugfp = NULL; /* debug output picture */ |
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char *progname; |
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|
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extern char *malloc(); |
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|
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|
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main(argc, argv) |
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int argc; |
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char **argv; |
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{ |
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int inpispic = 1; |
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int i; |
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|
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progname = argv[0]; |
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for (i = 1; i < argc && argv[i][0] == '-'; i++) |
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switch (argv[i][1]) { |
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case 'd': /* debug output */ |
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i++; |
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if (badarg(argc-i, argv+i, "s")) |
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goto userr; |
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if ((debugfp = fopen(argv[i], "w")) == NULL) { |
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perror(argv[i]); |
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exit(1); |
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} |
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#ifdef MSDOS |
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setmode(fileno(debugfp), O_BINARY); |
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#endif |
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newheader("RADIANCE", debugfp); /* start */ |
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printargs(argc, argv, debugfp); /* header */ |
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break; |
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case 'p': /* picture position */ |
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if (badarg(argc-i-1, argv+i+1, "iiiiiiii")) |
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goto userr; |
142 |
bounds[0][0] = atoi(argv[++i]); |
143 |
bounds[0][1] = atoi(argv[++i]); |
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bounds[1][0] = atoi(argv[++i]); |
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bounds[1][1] = atoi(argv[++i]); |
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bounds[2][0] = atoi(argv[++i]); |
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bounds[2][1] = atoi(argv[++i]); |
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bounds[3][0] = atoi(argv[++i]); |
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bounds[3][1] = atoi(argv[++i]); |
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inpispic = 2; |
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break; |
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case 'c': /* color input */ |
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inpispic = 0; |
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break; |
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default: |
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goto userr; |
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} |
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/* open files */ |
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if (i < argc && freopen(argv[i], "r", stdin) == NULL) { |
160 |
perror(argv[1]); |
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exit(1); |
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} |
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if (i+1 < argc && freopen(argv[i+1], "w", stdout) == NULL) { |
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perror(argv[2]); |
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exit(1); |
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} |
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if (inpispic) { /* load input picture header */ |
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#ifdef MSDOS |
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setmode(fileno(stdin), O_BINARY); |
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#endif |
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if (checkheader(stdin, COLRFMT, NULL) < 0 || |
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fgetresolu(&xmax, &ymax, stdin) < 0) { |
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fprintf(stderr, "%s: bad input picture\n", progname); |
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exit(1); |
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} |
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} else { /* else set default xmax and ymax */ |
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xmax = 512; |
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ymax = 2*512/3; |
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} |
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if (inpispic != 2) { /* use default boundaries */ |
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bounds[0][0] = bounds[2][0] = .029*xmax + .5; |
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bounds[0][1] = bounds[1][1] = .956*ymax + .5; |
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bounds[1][0] = bounds[3][0] = .971*xmax + .5; |
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bounds[2][1] = bounds[3][1] = .056*ymax + .5; |
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} |
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init(); /* initialize */ |
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if (inpispic) /* get picture colors */ |
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getpicture(); |
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else |
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getcolors(); |
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compute(); /* compute color mapping */ |
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/* print comment */ |
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printf("{ Color correction file computed by:\n\t"); |
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printargs(argc, argv, stdout); |
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printf("}\n"); |
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putmapping(); /* put out color mapping */ |
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if (debugfp != NULL) /* put out debug picture */ |
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if (inpispic) |
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picdebug(); |
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else |
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clrdebug(); |
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exit(0); |
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userr: |
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fprintf(stderr, |
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"Usage: %s [-d dbg.pic][-p xul yul xur yur xll yll xlr ylr] input.pic [output.cal]\n", |
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progname); |
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fprintf(stderr, " or: %s [-d dbg.pic] -c [xyY.dat [output.cal]]\n", |
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progname); |
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exit(1); |
210 |
} |
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|
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|
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init() /* initialize */ |
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{ |
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double quad[4][2]; |
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register int i; |
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/* make coordinate transformation */ |
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quad[0][0] = bounds[0][0]; |
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quad[0][1] = bounds[0][1]; |
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quad[1][0] = bounds[1][0]; |
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quad[1][1] = bounds[1][1]; |
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quad[2][0] = bounds[3][0]; |
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quad[2][1] = bounds[3][1]; |
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quad[3][0] = bounds[2][0]; |
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quad[3][1] = bounds[2][1]; |
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|
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if (pmap_quad_rect(0., 0., 6., 4., quad, imgxfm) == PMAP_BAD) { |
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fprintf(stderr, "%s: bad chart boundaries\n", progname); |
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exit(1); |
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} |
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/* map MacBeth colors to RGB space */ |
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for (i = 0; i < 24; i++) |
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xyY2RGB(mbRGB[i], mbxyY[i]); |
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} |
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|
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|
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int |
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chartndx(x, y, cvg) /* find color number for position */ |
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int x, y; |
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double cvg; |
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{ |
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double ipos[3], cpos[3]; |
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int ix, iy; |
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double fx, fy; |
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double cmin, cmax; |
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|
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ipos[0] = x; |
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ipos[1] = y; |
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ipos[2] = 1; |
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mx3d_transform(ipos, imgxfm, cpos); |
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cpos[0] /= cpos[2]; |
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cpos[1] /= cpos[2]; |
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if (cpos[0] < 0. || cpos[0] >= 6. || cpos[1] < 0. || cpos[1] >= 4.) |
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return(-1); |
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ix = cpos[0]; |
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iy = cpos[1]; |
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fx = cpos[0] - ix; |
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fy = cpos[1] - iy; |
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cmin = .5*(1.-cvg); |
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cmax = 1. - cmin; |
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if (fx < cmin || fx >= cmax || fy < cmin || fy >= cmax) |
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return(-1); |
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return(iy*6 + ix); |
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} |
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|
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|
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getpicture() /* load in picture colors */ |
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{ |
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COLR *scanln; |
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COLOR pval; |
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int ccount[24]; |
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double d; |
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int y; |
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register int x, i; |
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|
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scanln = (COLR *)malloc(xmax*sizeof(COLR)); |
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if (scanln == NULL) { |
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perror(progname); |
279 |
exit(1); |
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} |
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for (i = 0; i < 24; i++) { |
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setcolor(inpRGB[i], 0., 0., 0.); |
283 |
ccount[i] = 0; |
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} |
285 |
for (y = ymax-1; y >= 0; y--) { |
286 |
if (freadcolrs(scanln, xmax, stdin) < 0) { |
287 |
fprintf(stderr, "%s: error reading input picture\n", |
288 |
progname); |
289 |
exit(1); |
290 |
} |
291 |
for (x = 0; x < xmax; x++) { |
292 |
i = chartndx(x, y, CENTCVG); |
293 |
if (i >= 0) { |
294 |
colr_color(pval, scanln[x]); |
295 |
addcolor(inpRGB[i], pval); |
296 |
ccount[i]++; |
297 |
} |
298 |
} |
299 |
} |
300 |
for (i = 0; i < 24; i++) { /* compute averages */ |
301 |
if (ccount[i] == 0) |
302 |
continue; |
303 |
d = 1./ccount[i]; |
304 |
scalecolor(inpRGB[i], d); |
305 |
inpflags |= 1L<<i; |
306 |
} |
307 |
free((char *)scanln); |
308 |
} |
309 |
|
310 |
|
311 |
getcolors() /* get xyY colors from standard input */ |
312 |
{ |
313 |
int gotwhite = 0; |
314 |
COLOR whiteclr; |
315 |
int n; |
316 |
float xyYin[3]; |
317 |
|
318 |
while (fgetval(stdin, 'i', &n) == 1) { /* read colors */ |
319 |
if (n < 0 | n > 24 || |
320 |
fgetval(stdin, 'f', &xyYin[0]) != 1 || |
321 |
fgetval(stdin, 'f', &xyYin[1]) != 1 || |
322 |
fgetval(stdin, 'f', &xyYin[2]) != 1 || |
323 |
xyYin[0] < 0. | xyYin[0] > 1. | |
324 |
xyYin[1] < 0. | xyYin[1] > 1.) { |
325 |
fprintf(stderr, "%s: bad color input data\n", |
326 |
progname); |
327 |
exit(1); |
328 |
} |
329 |
if (n == 0) { /* calibration white */ |
330 |
xyY2RGB(whiteclr, xyYin); |
331 |
gotwhite++; |
332 |
} else { /* standard color */ |
333 |
n--; |
334 |
xyY2RGB(inpRGB[n], xyYin); |
335 |
inpflags |= 1L<<n; |
336 |
} |
337 |
} |
338 |
/* normalize colors */ |
339 |
if (!gotwhite) { |
340 |
if (!(inpflags & 1L<<White)) { |
341 |
fprintf(stderr, "%s: missing input for White\n", |
342 |
progname); |
343 |
exit(1); |
344 |
} |
345 |
setcolor(whiteclr, |
346 |
colval(inpRGB[White],RED)/colval(mbRGB[White],RED), |
347 |
colval(inpRGB[White],GRN)/colval(mbRGB[White],GRN), |
348 |
colval(inpRGB[White],BLU)/colval(mbRGB[White],BLU)); |
349 |
} |
350 |
for (n = 0; n < 24; n++) |
351 |
if (inpflags & 1L<<n) |
352 |
setcolor(inpRGB[n], |
353 |
colval(inpRGB[n],RED)/colval(whiteclr,RED), |
354 |
colval(inpRGB[n],GRN)/colval(whiteclr,GRN), |
355 |
colval(inpRGB[n],BLU)/colval(whiteclr,BLU)); |
356 |
} |
357 |
|
358 |
|
359 |
bresp(y, x) /* piecewise linear interpolation of primaries */ |
360 |
COLOR y, x; |
361 |
{ |
362 |
double cv[3]; |
363 |
register int i, n; |
364 |
|
365 |
for (i = 0; i < 3; i++) { |
366 |
for (n = 0; n < NMBNEU-2; n++) |
367 |
if (colval(x,i) < colval(bramp[n+1][0],i)) |
368 |
break; |
369 |
cv[i] = ((colval(bramp[n+1][0],i) - colval(x,i)) * |
370 |
colval(bramp[n][1],i) + |
371 |
(colval(x,i) - colval(bramp[n][0],i)) * |
372 |
colval(bramp[n+1][1],i)) / |
373 |
(colval(bramp[n+1][0],i) - colval(bramp[n][0],i)); |
374 |
if (cv[i] < 0.) cv[i] = 0.; |
375 |
} |
376 |
setcolor(y, cv[0], cv[1], cv[2]); |
377 |
} |
378 |
|
379 |
|
380 |
compute() /* compute color mapping */ |
381 |
{ |
382 |
COLOR clrin[NMBMOD], clrout[NMBMOD]; |
383 |
register int i, n; |
384 |
/* did we get what we need? */ |
385 |
if ((inpflags & REQFLGS) != REQFLGS) { |
386 |
fprintf(stderr, "%s: missing required input colors\n", |
387 |
progname); |
388 |
exit(1); |
389 |
} |
390 |
/* compute piecewise luminance curve */ |
391 |
for (i = 0; i < NMBNEU; i++) { |
392 |
copycolor(bramp[i][0], inpRGB[mbneu[i]]); |
393 |
copycolor(bramp[i][1], mbRGB[mbneu[i]]); |
394 |
} |
395 |
/* compute color matrix */ |
396 |
for (n = 0, i = 0; i < NMBMOD; i++) |
397 |
if (inpflags & 1L<<mbmod[i]) { |
398 |
bresp(clrin[n], inpRGB[mbmod[i]]); |
399 |
copycolor(clrout[n], mbRGB[mbmod[i]]); |
400 |
n++; |
401 |
} |
402 |
compsoln(clrin, clrout, n); |
403 |
} |
404 |
|
405 |
|
406 |
putmapping() /* put out color mapping for pcomb -f */ |
407 |
{ |
408 |
static char cchar[3] = {'r', 'g', 'b'}; |
409 |
register int i, j; |
410 |
/* print brightness mapping */ |
411 |
for (j = 0; j < 3; j++) { |
412 |
printf("%cxa(i) : select(i", cchar[j]); |
413 |
for (i = 0; i < NMBNEU; i++) |
414 |
printf(",%g", colval(bramp[i][0],j)); |
415 |
printf(");\n"); |
416 |
printf("%cya(i) : select(i", cchar[j]); |
417 |
for (i = 0; i < NMBNEU; i++) |
418 |
printf(",%g", colval(bramp[i][1],j)); |
419 |
printf(");\n"); |
420 |
printf("%c = %ci(1);\n", cchar[j], cchar[j]); |
421 |
printf("%cfi(n) = if(n-%g, %d, if(%cxa(n+1)-%c, n, %cfi(n+1)));\n", |
422 |
cchar[j], NMBNEU-1.5, NMBNEU-1, cchar[j], |
423 |
cchar[j], cchar[j]); |
424 |
printf("%cndx = %cfi(1);\n", cchar[j], cchar[j]); |
425 |
printf("%cn = ((%cxa(%cndx+1)-%c)*%cya(%cndx) + ", |
426 |
cchar[j], cchar[j], cchar[j], |
427 |
cchar[j], cchar[j], cchar[j]); |
428 |
printf("(%c-%cxa(%cndx))*%cya(%cndx+1)) /\n", |
429 |
cchar[j], cchar[j], cchar[j], |
430 |
cchar[j], cchar[j]); |
431 |
printf("\t\t(%cxa(%cndx+1) - %cxa(%cndx)) ;\n", |
432 |
cchar[j], cchar[j], cchar[j], cchar[j]); |
433 |
} |
434 |
/* print color mapping */ |
435 |
printf("ro = %g*rn + %g*gn + %g*bn ;\n", |
436 |
solmat[0][0], solmat[0][1], solmat[0][2]); |
437 |
printf("go = %g*rn + %g*gn + %g*bn ;\n", |
438 |
solmat[1][0], solmat[1][1], solmat[1][2]); |
439 |
printf("bo = %g*rn + %g*gn + %g*bn ;\n", |
440 |
solmat[2][0], solmat[2][1], solmat[2][2]); |
441 |
} |
442 |
|
443 |
|
444 |
compsoln(cin, cout, n) /* solve 3xN system using least-squares */ |
445 |
COLOR cin[], cout[]; |
446 |
int n; |
447 |
{ |
448 |
extern double mx3d_adjoint(), fabs(); |
449 |
double mat[3][3], invmat[3][3]; |
450 |
double det; |
451 |
double colv[3], rowv[3]; |
452 |
register int i, j, k; |
453 |
|
454 |
if (n < 3 | n > NMBMOD) { |
455 |
fprintf(stderr, "%s: bad number of colors to match\n", progname); |
456 |
exit(1); |
457 |
} |
458 |
if (n == 3) |
459 |
for (i = 0; i < 3; i++) |
460 |
for (j = 0; j < 3; j++) |
461 |
mat[i][j] = colval(cin[j],i); |
462 |
else { /* compute A^t A */ |
463 |
for (i = 0; i < 3; i++) |
464 |
for (j = i; j < 3; j++) { |
465 |
mat[i][j] = 0.; |
466 |
for (k = 0; k < n; k++) |
467 |
mat[i][j] += colval(cin[k],i) * |
468 |
colval(cin[k],j); |
469 |
} |
470 |
for (i = 1; i < 3; i++) /* using symmetry */ |
471 |
for (j = 0; j < i; j++) |
472 |
mat[i][j] = mat[j][i]; |
473 |
} |
474 |
det = mx3d_adjoint(mat, invmat); |
475 |
if (fabs(det) < 1e-4) { |
476 |
fprintf(stderr, "%s: cannot compute color mapping\n", |
477 |
progname); |
478 |
solmat[0][0] = solmat[1][1] = solmat[2][2] = 1.; |
479 |
solmat[0][1] = solmat[0][2] = solmat[1][0] = |
480 |
solmat[1][2] = solmat[2][0] = solmat[2][1] = 0.; |
481 |
return; |
482 |
} |
483 |
for (i = 0; i < 3; i++) |
484 |
for (j = 0; j < 3; j++) |
485 |
invmat[i][j] /= det; |
486 |
for (i = 0; i < 3; i++) { |
487 |
if (n == 3) |
488 |
for (j = 0; j < 3; j++) |
489 |
colv[j] = colval(cout[j],i); |
490 |
else |
491 |
for (j = 0; j < 3; j++) { |
492 |
colv[j] = 0.; |
493 |
for (k = 0; k < n; k++) |
494 |
colv[j] += colval(cout[k],i) * |
495 |
colval(cin[k],j); |
496 |
} |
497 |
mx3d_transform(colv, invmat, rowv); |
498 |
for (j = 0; j < 3; j++) |
499 |
solmat[i][j] = rowv[j]; |
500 |
} |
501 |
} |
502 |
|
503 |
|
504 |
cvtcolor(cout, cin) /* convert color according to our mapping */ |
505 |
COLOR cout, cin; |
506 |
{ |
507 |
double r, g, b; |
508 |
|
509 |
bresp(cout, cin); |
510 |
r = colval(cout,0)*solmat[0][0] + colval(cout,1)*solmat[0][1] |
511 |
+ colval(cout,2)*solmat[0][2]; |
512 |
if (r < 0) r = 0; |
513 |
g = colval(cout,0)*solmat[1][0] + colval(cout,1)*solmat[1][1] |
514 |
+ colval(cout,2)*solmat[1][2]; |
515 |
if (g < 0) g = 0; |
516 |
b = colval(cout,0)*solmat[2][0] + colval(cout,1)*solmat[2][1] |
517 |
+ colval(cout,2)*solmat[2][2]; |
518 |
if (b < 0) b = 0; |
519 |
setcolor(cout, r, g, b); |
520 |
} |
521 |
|
522 |
|
523 |
xyY2RGB(rgbout, xyYin) /* convert xyY to RGB */ |
524 |
COLOR rgbout; |
525 |
register float xyYin[3]; |
526 |
{ |
527 |
COLOR ctmp; |
528 |
double d; |
529 |
|
530 |
d = xyYin[2] / xyYin[1]; |
531 |
ctmp[0] = xyYin[0] * d; |
532 |
ctmp[1] = xyYin[2]; |
533 |
ctmp[2] = (1. - xyYin[0] - xyYin[1]) * d; |
534 |
cie_rgb(rgbout, ctmp); |
535 |
} |
536 |
|
537 |
|
538 |
picdebug() /* put out debugging picture */ |
539 |
{ |
540 |
COLOR *scan; |
541 |
int y; |
542 |
register int x, i; |
543 |
|
544 |
if (fseek(stdin, 0L, 0) == EOF) { |
545 |
fprintf(stderr, "%s: cannot seek on input picture\n", progname); |
546 |
exit(1); |
547 |
} |
548 |
getheader(stdin, NULL, NULL); /* skip input header */ |
549 |
fgetresolu(&xmax, &ymax, stdin); |
550 |
/* allocate scanline */ |
551 |
scan = (COLOR *)malloc(xmax*sizeof(COLOR)); |
552 |
if (scan == NULL) { |
553 |
perror(progname); |
554 |
exit(1); |
555 |
} |
556 |
/* finish debug header */ |
557 |
fputformat(COLRFMT, debugfp); |
558 |
putc('\n', debugfp); |
559 |
fprtresolu(xmax, ymax, debugfp); |
560 |
/* write debug picture */ |
561 |
for (y = ymax-1; y >= 0; y--) { |
562 |
if (freadscan(scan, xmax, stdin) < 0) { |
563 |
fprintf(stderr, "%s: error rereading input picture\n", |
564 |
progname); |
565 |
exit(1); |
566 |
} |
567 |
for (x = 0; x < xmax; x++) { |
568 |
i = chartndx(x, y, CENTCVG); |
569 |
if (i < 0) |
570 |
cvtcolor(scan[x], scan[x]); |
571 |
else |
572 |
copycolor(scan[x], mbRGB[i]); |
573 |
} |
574 |
if (fwritescan(scan, xmax, debugfp) < 0) { |
575 |
fprintf(stderr, "%s: error writing debugging picture\n", |
576 |
progname); |
577 |
exit(1); |
578 |
} |
579 |
} |
580 |
/* clean up */ |
581 |
fclose(debugfp); |
582 |
free((char *)scan); |
583 |
} |
584 |
|
585 |
|
586 |
clrdebug() /* put out debug picture from color input */ |
587 |
{ |
588 |
static COLR blkclr = BLKCOLR; |
589 |
COLR mbclr[24], cvclr[24]; |
590 |
COLR *scan; |
591 |
COLOR ctmp; |
592 |
int y; |
593 |
register int i, x; |
594 |
/* convert colors */ |
595 |
for (i = 0; i < 24; i++) { |
596 |
setcolr(mbclr[i], colval(mbRGB[i],RED), |
597 |
colval(mbRGB[i],GRN), colval(mbRGB[i],BLU)); |
598 |
if (inpflags & 1L<<i) { |
599 |
cvtcolor(ctmp, inpRGB[i]); |
600 |
setcolr(cvclr[i], colval(ctmp,RED), |
601 |
colval(ctmp,GRN), colval(ctmp,BLU)); |
602 |
} |
603 |
} |
604 |
/* allocate scanline */ |
605 |
scan = (COLR *)malloc(xmax*sizeof(COLR)); |
606 |
if (scan == NULL) { |
607 |
perror(progname); |
608 |
exit(1); |
609 |
} |
610 |
/* finish debug header */ |
611 |
fputformat(COLRFMT, debugfp); |
612 |
putc('\n', debugfp); |
613 |
fprtresolu(xmax, ymax, debugfp); |
614 |
/* write debug picture */ |
615 |
for (y = ymax-1; y >= 0; y--) { |
616 |
for (x = 0; x < xmax; x++) |
617 |
if ((i = chartndx(x, y, CENTCVG)) >= 0) |
618 |
copycolr(scan[x], mbclr[i]); |
619 |
else if ((i = chartndx(x, y, FULLCVG)) >= 0 && |
620 |
inpflags & 1L<<i) |
621 |
copycolr(scan[x], cvclr[i]); |
622 |
else |
623 |
copycolr(scan[x], blkclr); |
624 |
if (fwritecolrs(scan, xmax, debugfp) < 0) { |
625 |
fprintf(stderr, "%s: error writing debugging picture\n", |
626 |
progname); |
627 |
exit(1); |
628 |
} |
629 |
} |
630 |
/* clean up */ |
631 |
fclose(debugfp); |
632 |
free((char *)scan); |
633 |
} |