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/* Copyright (c) 1995 Regents of the University of California */ |
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/* Copyright (c) 1997 Regents of the University of California */ |
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#ifndef lint |
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static char SCCSid[] = "$SunId$ LBL"; |
18 |
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#include "resolu.h" |
19 |
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#include "pmap.h" |
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|
21 |
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/* MacBeth colors (CIE 1931, absolute white) */ |
22 |
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/* computed from spectral measurements */ |
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/* MacBeth colors */ |
22 |
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#define DarkSkin 0 |
23 |
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#define LightSkin 1 |
24 |
> |
#define BlueSky 2 |
25 |
> |
#define Foliage 3 |
26 |
> |
#define BlueFlower 4 |
27 |
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#define BluishGreen 5 |
28 |
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#define Orange 6 |
29 |
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#define PurplishBlue 7 |
30 |
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#define ModerateRed 8 |
31 |
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#define Purple 9 |
32 |
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#define YellowGreen 10 |
33 |
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#define OrangeYellow 11 |
34 |
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#define Blue 12 |
35 |
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#define Green 13 |
36 |
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#define Red 14 |
37 |
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#define Yellow 15 |
38 |
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#define Magenta 16 |
39 |
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#define Cyan 17 |
40 |
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#define White 18 |
41 |
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#define Neutral8 19 |
42 |
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#define Neutral65 20 |
43 |
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#define Neutral5 21 |
44 |
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#define Neutral35 22 |
45 |
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#define Black 23 |
46 |
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/* computed from 5nm spectral measurements */ |
47 |
> |
/* CIE 1931 2 degree obs, equal-energy white */ |
48 |
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float mbxyY[24][3] = { |
49 |
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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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COLOR mbRGB[24]; /* MacBeth RGB values */ |
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|
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#define NMBNEU 6 /* Number of MacBeth neutral colors */ |
78 |
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short mbneu[NMBNEU] = {23,22,21,20,19,18}; |
54 |
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#define NMBMOD 3 /* Number of MacBeth moderate colors */ |
55 |
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short mbmod[NMBMOD] = {1,2,21}; |
56 |
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#define NMBSAT 6 /* Number of MacBeth saturated colors */ |
57 |
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short mbsat[NMBSAT] = {14,12,13,15,16,17}; |
78 |
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short mbneu[NMBNEU] = {Black,Neutral35,Neutral5,Neutral65,Neutral8,White}; |
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|
80 |
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#define NEUFLGS (1L<<White|1L<<Neutral8|1L<<Neutral65| \ |
81 |
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1L<<Neutral5|1L<<Neutral35|1L<<Black) |
82 |
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|
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#define SATFLGS (1L<<Red|1L<<Green|1L<<Blue|1L<<Magenta|1L<<Yellow| \ |
84 |
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1L<<Cyan|1L<<Orange|1L<<Purple|1L<<PurplishBlue| \ |
85 |
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1L<<YellowGreen|1<<OrangeYellow|1L<<BlueFlower) |
86 |
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|
87 |
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#define UNSFLGS (1L<<DarkSkin|1L<<LightSkin|1L<<BlueSky|1L<<Foliage| \ |
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1L<<BluishGreen|1L<<ModerateRed) |
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|
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#define REQFLGS NEUFLGS /* need these colors */ |
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#define MODFLGS (NEUFLGS|UNSFLGS) /* should be in gamut */ |
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|
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#define RG_BORD 0 /* patch border */ |
94 |
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#define RG_CENT 01 /* central region of patch */ |
95 |
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#define RG_ORIG 02 /* original color region */ |
96 |
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#define RG_CORR 04 /* corrected color region */ |
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|
98 |
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int scanning = 1; /* scanned input (or recorded output)? */ |
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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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|
104 |
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COLOR picRGB[24]; /* picture colors */ |
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COLOR inpRGB[24]; /* measured or scanned input colors */ |
105 |
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long inpflags = 0; /* flags of which colors were input */ |
106 |
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long gmtflags = 0; /* flags of out-of-gamut colors */ |
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|
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COLOR bramp[NMBNEU][2]; /* brightness ramp (per primary) */ |
109 |
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double solmat[3][3]; /* color mapping matrix */ |
109 |
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COLORMAT solmat; /* color mapping matrix */ |
110 |
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COLOR colmin, colmax; /* gamut limits */ |
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|
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FILE *debugfp = NULL; |
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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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int i; |
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|
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progname = argv[0]; |
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if (argc > 2 && !strcmp(argv[1], "-d")) { /* debug output */ |
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if ((debugfp = fopen(argv[2], "w")) == NULL) { |
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perror(argv[2]); |
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exit(1); |
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} |
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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; |
131 |
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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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setmode(fileno(debugfp), O_BINARY); |
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#endif |
138 |
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newheader("RADIANCE", debugfp); |
139 |
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printargs(argc, argv, debugfp); |
140 |
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argv += 2; |
141 |
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argc -= 2; |
142 |
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} |
143 |
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if (argc != 3 && argc != 11) |
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goto userr; |
145 |
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if (strcmp(argv[1], "-") && freopen(argv[1], "r", stdin) == NULL) { |
146 |
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perror(argv[1]); |
138 |
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newheader("RADIANCE", debugfp); /* start */ |
139 |
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printargs(argc, argv, debugfp); /* header */ |
140 |
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break; |
141 |
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case 'p': /* picture position */ |
142 |
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if (badarg(argc-i-1, argv+i+1, "iiiiiiii")) |
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goto userr; |
144 |
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bounds[0][0] = atoi(argv[++i]); |
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bounds[0][1] = atoi(argv[++i]); |
146 |
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bounds[1][0] = atoi(argv[++i]); |
147 |
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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]); |
150 |
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bounds[3][0] = atoi(argv[++i]); |
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bounds[3][1] = atoi(argv[++i]); |
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scanning = 2; |
153 |
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break; |
154 |
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case 'c': /* color input */ |
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scanning = 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 */ |
161 |
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if (i < argc && freopen(argv[i], "r", stdin) == NULL) { |
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perror(argv[i]); |
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exit(1); |
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} |
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if (strcmp(argv[2], "-") && freopen(argv[2], "w", stdout) == NULL) { |
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perror(argv[2]); |
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if (i+1 < argc && freopen(argv[i+1], "w", stdout) == NULL) { |
166 |
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perror(argv[i+1]); |
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exit(1); |
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} |
169 |
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if (scanning) { /* load input picture header */ |
170 |
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#ifdef MSDOS |
171 |
< |
setmode(fileno(stdin), O_BINARY); |
171 |
> |
setmode(fileno(stdin), O_BINARY); |
172 |
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#endif |
173 |
< |
if (checkheader(stdin, COLRFMT, NULL) < 0 || |
174 |
< |
fgetresolu(&xmax, &ymax, stdin) < 0) { |
175 |
< |
fprintf(stderr, "%s: bad input picture\n", progname); |
176 |
< |
exit(1); |
111 |
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} |
112 |
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/* get chart boundaries */ |
113 |
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if (argc == 11) { |
114 |
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for (i = 0; i < 4; i++) { |
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if (!isint(argv[2*i+3]) | !isint(argv[2*i+4])) |
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goto userr; |
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bounds[i][0] = atoi(argv[2*i+3]); |
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bounds[i][1] = atoi(argv[2*i+4]); |
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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 { |
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} else { /* else set default xmax and ymax */ |
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xmax = 512; |
180 |
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ymax = 2*512/3; |
181 |
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} |
182 |
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if (scanning != 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 */ |
189 |
< |
getcolors(); /* get picture colors */ |
189 |
> |
if (scanning) /* get picture colors */ |
190 |
> |
getpicture(); |
191 |
> |
else |
192 |
> |
getcolors(); |
193 |
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compute(); /* compute color mapping */ |
194 |
+ |
/* print comment */ |
195 |
+ |
printf("{\n\tColor correction file computed by:\n\t\t"); |
196 |
+ |
printargs(argc, argv, stdout); |
197 |
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printf("\n\tUsage: pcomb -f %s uncorrected.pic > corrected.pic\n", |
198 |
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i+1 < argc ? argv[i+1] : "{this_file}"); |
199 |
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if (!scanning) |
200 |
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printf("\t Or: pcond [options] -f %s orig.pic > output.pic\n", |
201 |
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i+1 < argc ? argv[i+1] : "{this_file}"); |
202 |
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printf("}\n"); |
203 |
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putmapping(); /* put out color mapping */ |
204 |
< |
putdebug(); /* put out debug picture */ |
204 |
> |
if (debugfp != NULL) /* put out debug picture */ |
205 |
> |
if (scanning) |
206 |
> |
picdebug(); |
207 |
> |
else |
208 |
> |
clrdebug(); |
209 |
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exit(0); |
210 |
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userr: |
211 |
< |
fprintf(stderr, "Usage: %s [-d dbg.pic] input.pic output.cal [xul yul xur yur xll yll xlr ylr]\n", |
211 |
> |
fprintf(stderr, |
212 |
> |
"Usage: %s [-d dbg.pic][-p xul yul xur yur xll yll xlr ylr] input.pic [output.cal]\n", |
213 |
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progname); |
214 |
+ |
fprintf(stderr, " or: %s [-d dbg.pic] -c [xyY.dat [output.cal]]\n", |
215 |
+ |
progname); |
216 |
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exit(1); |
217 |
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} |
218 |
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|
220 |
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init() /* initialize */ |
221 |
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{ |
222 |
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double quad[4][2]; |
223 |
+ |
register int i; |
224 |
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/* make coordinate transformation */ |
225 |
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quad[0][0] = bounds[0][0]; |
226 |
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quad[0][1] = bounds[0][1]; |
235 |
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fprintf(stderr, "%s: bad chart boundaries\n", progname); |
236 |
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exit(1); |
237 |
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} |
238 |
+ |
/* map MacBeth colors to RGB space */ |
239 |
+ |
for (i = 0; i < 24; i++) |
240 |
+ |
xyY2RGB(mbRGB[i], mbxyY[i]); |
241 |
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} |
242 |
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|
243 |
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|
244 |
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int |
245 |
< |
chartndx(x, y) /* find color number for position */ |
245 |
> |
chartndx(x, y, np) /* find color number for position */ |
246 |
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int x, y; |
247 |
+ |
int *np; |
248 |
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{ |
249 |
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double ipos[3], cpos[3]; |
250 |
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int ix, iy; |
257 |
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cpos[0] /= cpos[2]; |
258 |
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cpos[1] /= cpos[2]; |
259 |
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if (cpos[0] < 0. || cpos[0] >= 6. || cpos[1] < 0. || cpos[1] >= 4.) |
260 |
< |
return(-1); |
260 |
> |
return(RG_BORD); |
261 |
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ix = cpos[0]; |
262 |
|
iy = cpos[1]; |
263 |
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fx = cpos[0] - ix; |
264 |
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fy = cpos[1] - iy; |
265 |
< |
if (fx < .35 || fx >= .65 || fy < .35 || fy >= .65) |
266 |
< |
return(-1); |
267 |
< |
return(iy*6 + ix); |
265 |
> |
*np = iy*6 + ix; |
266 |
> |
if (fx >= 0.35 && fx < 0.65 && fy >= 0.35 && fy < 0.65) |
267 |
> |
return(RG_CENT); |
268 |
> |
if (fx < 0.05 || fx >= 0.95 || fy < 0.05 || fy >= 0.95) |
269 |
> |
return(RG_BORD); |
270 |
> |
if (fx >= 0.5) /* right side is corrected */ |
271 |
> |
return(RG_CORR); |
272 |
> |
return(RG_ORIG); /* left side is original */ |
273 |
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} |
274 |
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|
275 |
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|
276 |
< |
getcolors() /* load in picture colors */ |
276 |
> |
getpicture() /* load in picture colors */ |
277 |
|
{ |
278 |
|
COLR *scanln; |
279 |
|
COLOR pval; |
280 |
|
int ccount[24]; |
281 |
|
double d; |
282 |
< |
int y; |
283 |
< |
register int x, i; |
282 |
> |
int y, i; |
283 |
> |
register int x; |
284 |
|
|
285 |
|
scanln = (COLR *)malloc(xmax*sizeof(COLR)); |
286 |
|
if (scanln == NULL) { |
288 |
|
exit(1); |
289 |
|
} |
290 |
|
for (i = 0; i < 24; i++) { |
291 |
< |
setcolor(picRGB[i], 0., 0., 0.); |
291 |
> |
setcolor(inpRGB[i], 0., 0., 0.); |
292 |
|
ccount[i] = 0; |
293 |
|
} |
294 |
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for (y = ymax-1; y >= 0; y--) { |
297 |
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progname); |
298 |
|
exit(1); |
299 |
|
} |
300 |
< |
for (x = 0; x < xmax; x++) { |
301 |
< |
i = chartndx(x, y); |
211 |
< |
if (i >= 0) { |
300 |
> |
for (x = 0; x < xmax; x++) |
301 |
> |
if (chartndx(x, y, &i) == RG_CENT) { |
302 |
|
colr_color(pval, scanln[x]); |
303 |
< |
addcolor(picRGB[i], pval); |
303 |
> |
addcolor(inpRGB[i], pval); |
304 |
|
ccount[i]++; |
305 |
|
} |
306 |
+ |
} |
307 |
+ |
for (i = 0; i < 24; i++) { /* compute averages */ |
308 |
+ |
if (ccount[i] == 0) |
309 |
+ |
continue; |
310 |
+ |
d = 1./ccount[i]; |
311 |
+ |
scalecolor(inpRGB[i], d); |
312 |
+ |
inpflags |= 1L<<i; |
313 |
+ |
} |
314 |
+ |
free((char *)scanln); |
315 |
+ |
} |
316 |
+ |
|
317 |
+ |
|
318 |
+ |
getcolors() /* get xyY colors from standard input */ |
319 |
+ |
{ |
320 |
+ |
int gotwhite = 0; |
321 |
+ |
COLOR whiteclr; |
322 |
+ |
int n; |
323 |
+ |
float xyYin[3]; |
324 |
+ |
|
325 |
+ |
while (fgetval(stdin, 'i', &n) == 1) { /* read colors */ |
326 |
+ |
if (n < 0 | n > 24 || |
327 |
+ |
fgetval(stdin, 'f', &xyYin[0]) != 1 || |
328 |
+ |
fgetval(stdin, 'f', &xyYin[1]) != 1 || |
329 |
+ |
fgetval(stdin, 'f', &xyYin[2]) != 1 || |
330 |
+ |
xyYin[0] < 0. | xyYin[1] < 0. || |
331 |
+ |
xyYin[0] + xyYin[1] > 1.) { |
332 |
+ |
fprintf(stderr, "%s: bad color input data\n", |
333 |
+ |
progname); |
334 |
+ |
exit(1); |
335 |
|
} |
336 |
+ |
if (n == 0) { /* calibration white */ |
337 |
+ |
xyY2RGB(whiteclr, xyYin); |
338 |
+ |
gotwhite++; |
339 |
+ |
} else { /* standard color */ |
340 |
+ |
n--; |
341 |
+ |
xyY2RGB(inpRGB[n], xyYin); |
342 |
+ |
inpflags |= 1L<<n; |
343 |
+ |
} |
344 |
|
} |
345 |
< |
for (i = 0; i < 24; i++) { |
346 |
< |
if (ccount[i] == 0) { |
347 |
< |
fprintf(stderr, "%s: bad chart boundaries\n", |
345 |
> |
/* normalize colors */ |
346 |
> |
if (!gotwhite) { |
347 |
> |
if (!(inpflags & 1L<<White)) { |
348 |
> |
fprintf(stderr, "%s: missing input for White\n", |
349 |
|
progname); |
350 |
|
exit(1); |
351 |
|
} |
352 |
< |
d = 1.0/ccount[i]; |
353 |
< |
scalecolor(picRGB[i], d); |
352 |
> |
setcolor(whiteclr, |
353 |
> |
colval(inpRGB[White],RED)/colval(mbRGB[White],RED), |
354 |
> |
colval(inpRGB[White],GRN)/colval(mbRGB[White],GRN), |
355 |
> |
colval(inpRGB[White],BLU)/colval(mbRGB[White],BLU)); |
356 |
|
} |
357 |
< |
free((char *)scanln); |
357 |
> |
for (n = 0; n < 24; n++) |
358 |
> |
if (inpflags & 1L<<n) |
359 |
> |
setcolor(inpRGB[n], |
360 |
> |
colval(inpRGB[n],RED)/colval(whiteclr,RED), |
361 |
> |
colval(inpRGB[n],GRN)/colval(whiteclr,GRN), |
362 |
> |
colval(inpRGB[n],BLU)/colval(whiteclr,BLU)); |
363 |
|
} |
364 |
|
|
365 |
|
|
369 |
|
register int i, n; |
370 |
|
|
371 |
|
for (i = 0; i < 3; i++) { |
372 |
< |
n = NMBNEU; |
373 |
< |
while (n > 0 && colval(x,i) < colval(bramp[--n][0],i)) |
374 |
< |
; |
372 |
> |
for (n = 0; n < NMBNEU-2; n++) |
373 |
> |
if (colval(x,i) < colval(bramp[n+1][0],i)) |
374 |
> |
break; |
375 |
|
colval(y,i) = ((colval(bramp[n+1][0],i) - colval(x,i)) * |
376 |
|
colval(bramp[n][1],i) + |
377 |
|
(colval(x,i) - colval(bramp[n][0],i)) * |
383 |
|
|
384 |
|
compute() /* compute color mapping */ |
385 |
|
{ |
386 |
< |
COLOR clrin[NMBMOD], clrout[NMBMOD]; |
386 |
> |
COLOR clrin[24], clrout[24]; |
387 |
> |
long cflags; |
388 |
|
COLOR ctmp; |
389 |
< |
double d; |
390 |
< |
register int i; |
391 |
< |
/* map MacBeth colors to RGB space */ |
392 |
< |
for (i = 0; i < 24; i++) { |
393 |
< |
d = mbxyY[i][2] / mbxyY[i][1]; |
394 |
< |
ctmp[0] = mbxyY[i][0] * d; |
259 |
< |
ctmp[1] = mbxyY[i][2]; |
260 |
< |
ctmp[2] = (1. - mbxyY[i][0] - mbxyY[i][1]) * d; |
261 |
< |
cie_rgb(mbRGB[i], ctmp); |
389 |
> |
register int i, n; |
390 |
> |
/* did we get what we need? */ |
391 |
> |
if ((inpflags & REQFLGS) != REQFLGS) { |
392 |
> |
fprintf(stderr, "%s: missing required input colors\n", |
393 |
> |
progname); |
394 |
> |
exit(1); |
395 |
|
} |
396 |
|
/* compute piecewise luminance curve */ |
397 |
|
for (i = 0; i < NMBNEU; i++) { |
398 |
< |
copycolor(bramp[i][0], picRGB[mbneu[i]]); |
398 |
> |
copycolor(bramp[i][0], inpRGB[mbneu[i]]); |
399 |
|
copycolor(bramp[i][1], mbRGB[mbneu[i]]); |
400 |
|
} |
401 |
< |
/* compute color matrix */ |
402 |
< |
for (i = 0; i < NMBMOD; i++) { |
403 |
< |
bresp(clrin[i], picRGB[mbmod[i]]); |
404 |
< |
copycolor(clrout[i], mbRGB[mbmod[i]]); |
405 |
< |
} |
406 |
< |
compsoln(clrin, clrout, NMBMOD); |
401 |
> |
/* compute color space gamut */ |
402 |
> |
if (scanning) { |
403 |
> |
copycolor(colmin, cblack); |
404 |
> |
copycolor(colmax, cwhite); |
405 |
> |
} else |
406 |
> |
for (i = 0; i < 3; i++) { |
407 |
> |
colval(colmin,i) = colval(bramp[0][0],i) - |
408 |
> |
colval(bramp[0][1],i) * |
409 |
> |
(colval(bramp[1][0],i)-colval(bramp[0][0],i)) / |
410 |
> |
(colval(bramp[1][1],i)-colval(bramp[1][0],i)); |
411 |
> |
colval(colmax,i) = colval(bramp[NMBNEU-2][0],i) + |
412 |
> |
(1.-colval(bramp[NMBNEU-2][1],i)) * |
413 |
> |
(colval(bramp[NMBNEU-1][0],i) - |
414 |
> |
colval(bramp[NMBNEU-2][0],i)) / |
415 |
> |
(colval(bramp[NMBNEU-1][1],i) - |
416 |
> |
colval(bramp[NMBNEU-2][1],i)); |
417 |
> |
} |
418 |
> |
/* compute color mapping */ |
419 |
> |
do { |
420 |
> |
cflags = inpflags & ~gmtflags; |
421 |
> |
n = 0; /* compute transform matrix */ |
422 |
> |
for (i = 0; i < 24; i++) |
423 |
> |
if (cflags & 1L<<i) { |
424 |
> |
bresp(clrin[n], inpRGB[i]); |
425 |
> |
copycolor(clrout[n], mbRGB[i]); |
426 |
> |
n++; |
427 |
> |
} |
428 |
> |
compsoln(clrin, clrout, n); |
429 |
> |
/* check out-of-gamut colors */ |
430 |
> |
for (i = 0; i < 24; i++) |
431 |
> |
if (cflags & 1L<<i && cvtcolor(ctmp, mbRGB[i])) |
432 |
> |
gmtflags |= 1L<<i; |
433 |
> |
} while (cflags & gmtflags); |
434 |
> |
if (gmtflags & MODFLGS) |
435 |
> |
fprintf(stderr, |
436 |
> |
"%s: warning - some moderate colors are out of gamut\n", |
437 |
> |
progname); |
438 |
|
} |
439 |
|
|
440 |
|
|
452 |
|
for (i = 0; i < NMBNEU; i++) |
453 |
|
printf(",%g", colval(bramp[i][1],j)); |
454 |
|
printf(");\n"); |
291 |
– |
printf("%c = %ci(1);\n", cchar[j], cchar[j]); |
455 |
|
printf("%cfi(n) = if(n-%g, %d, if(%cxa(n+1)-%c, n, %cfi(n+1)));\n", |
456 |
|
cchar[j], NMBNEU-1.5, NMBNEU-1, cchar[j], |
457 |
|
cchar[j], cchar[j]); |
458 |
|
printf("%cndx = %cfi(1);\n", cchar[j], cchar[j]); |
459 |
< |
printf("%cn = ((%cxa(%cndx+1)-%c)*%cya(%cndx) + ", |
460 |
< |
cchar[j], cchar[j], cchar[j], |
461 |
< |
cchar[j], cchar[j], cchar[j]); |
459 |
> |
printf("%c%c = ((%cxa(%cndx+1)-%c)*%cya(%cndx) + ", |
460 |
> |
cchar[j], scanning?'n':'o', cchar[j], |
461 |
> |
cchar[j], cchar[j], cchar[j], cchar[j]); |
462 |
|
printf("(%c-%cxa(%cndx))*%cya(%cndx+1)) /\n", |
463 |
|
cchar[j], cchar[j], cchar[j], |
464 |
|
cchar[j], cchar[j]); |
466 |
|
cchar[j], cchar[j], cchar[j], cchar[j]); |
467 |
|
} |
468 |
|
/* print color mapping */ |
469 |
< |
printf("ro = %g*rn + %g*gn + %g*bn ;\n", |
470 |
< |
solmat[0][0], solmat[1][0], solmat[2][0]); |
471 |
< |
printf("go = %g*rn + %g*gn + %g*bn ;\n", |
472 |
< |
solmat[0][1], solmat[1][1], solmat[2][1]); |
473 |
< |
printf("bo = %g*rn + %g*gn + %g*bn ;\n", |
474 |
< |
solmat[0][2], solmat[1][2], solmat[2][2]); |
469 |
> |
if (scanning) { |
470 |
> |
printf("r = ri(1); g = gi(1); b = bi(1);\n"); |
471 |
> |
printf("ro = %g*rn + %g*gn + %g*bn ;\n", |
472 |
> |
solmat[0][0], solmat[0][1], solmat[0][2]); |
473 |
> |
printf("go = %g*rn + %g*gn + %g*bn ;\n", |
474 |
> |
solmat[1][0], solmat[1][1], solmat[1][2]); |
475 |
> |
printf("bo = %g*rn + %g*gn + %g*bn ;\n", |
476 |
> |
solmat[2][0], solmat[2][1], solmat[2][2]); |
477 |
> |
} else { |
478 |
> |
printf("r1 = ri(1); g1 = gi(1); b1 = bi(1);\n"); |
479 |
> |
printf("r = %g*r1 + %g*g1 + %g*b1 ;\n", |
480 |
> |
solmat[0][0], solmat[0][1], solmat[0][2]); |
481 |
> |
printf("g = %g*r1 + %g*g1 + %g*b1 ;\n", |
482 |
> |
solmat[1][0], solmat[1][1], solmat[1][2]); |
483 |
> |
printf("b = %g*r1 + %g*g1 + %g*b1 ;\n", |
484 |
> |
solmat[2][0], solmat[2][1], solmat[2][2]); |
485 |
> |
} |
486 |
|
} |
487 |
|
|
488 |
|
|
489 |
< |
compsoln(cin, cout, n) /* solve 3x3 system */ |
489 |
> |
compsoln(cin, cout, n) /* solve 3xN system using least-squares */ |
490 |
|
COLOR cin[], cout[]; |
491 |
|
int n; |
492 |
|
{ |
494 |
|
double mat[3][3], invmat[3][3]; |
495 |
|
double det; |
496 |
|
double colv[3], rowv[3]; |
497 |
< |
register int i, j; |
497 |
> |
register int i, j, k; |
498 |
|
|
499 |
< |
if (n != 3) { |
500 |
< |
fprintf(stderr, "%s: inconsistent code!\n", progname); |
499 |
> |
if (n < 3) { |
500 |
> |
fprintf(stderr, "%s: too few colors to match!\n", progname); |
501 |
|
exit(1); |
502 |
|
} |
503 |
< |
for (i = 0; i < 3; i++) |
504 |
< |
for (j = 0; j < 3; j++) |
505 |
< |
mat[i][j] = colval(cin[j],i); |
503 |
> |
if (n == 3) |
504 |
> |
for (i = 0; i < 3; i++) |
505 |
> |
for (j = 0; j < 3; j++) |
506 |
> |
mat[i][j] = colval(cin[j],i); |
507 |
> |
else { /* compute A^t A */ |
508 |
> |
for (i = 0; i < 3; i++) |
509 |
> |
for (j = i; j < 3; j++) { |
510 |
> |
mat[i][j] = 0.; |
511 |
> |
for (k = 0; k < n; k++) |
512 |
> |
mat[i][j] += colval(cin[k],i) * |
513 |
> |
colval(cin[k],j); |
514 |
> |
} |
515 |
> |
for (i = 1; i < 3; i++) /* using symmetry */ |
516 |
> |
for (j = 0; j < i; j++) |
517 |
> |
mat[i][j] = mat[j][i]; |
518 |
> |
} |
519 |
|
det = mx3d_adjoint(mat, invmat); |
520 |
|
if (fabs(det) < 1e-4) { |
521 |
|
fprintf(stderr, "%s: cannot compute color mapping\n", |
529 |
|
for (j = 0; j < 3; j++) |
530 |
|
invmat[i][j] /= det; |
531 |
|
for (i = 0; i < 3; i++) { |
532 |
+ |
if (n == 3) |
533 |
+ |
for (j = 0; j < 3; j++) |
534 |
+ |
colv[j] = colval(cout[j],i); |
535 |
+ |
else |
536 |
+ |
for (j = 0; j < 3; j++) { |
537 |
+ |
colv[j] = 0.; |
538 |
+ |
for (k = 0; k < n; k++) |
539 |
+ |
colv[j] += colval(cout[k],i) * |
540 |
+ |
colval(cin[k],j); |
541 |
+ |
} |
542 |
+ |
mx3d_transform(colv, invmat, rowv); |
543 |
|
for (j = 0; j < 3; j++) |
544 |
< |
rowv[j] = colval(cout[j],i); |
347 |
< |
mx3d_transform(rowv, invmat, colv); |
348 |
< |
for (j = 0; j < 3; j++) |
349 |
< |
solmat[j][i] = colv[j]; |
544 |
> |
solmat[i][j] = rowv[j]; |
545 |
|
} |
546 |
|
} |
547 |
|
|
548 |
|
|
549 |
+ |
int |
550 |
|
cvtcolor(cout, cin) /* convert color according to our mapping */ |
551 |
|
COLOR cout, cin; |
552 |
|
{ |
553 |
< |
double r, g, b; |
553 |
> |
COLOR ctmp; |
554 |
> |
int clipped; |
555 |
|
|
556 |
< |
bresp(cout, cin); |
557 |
< |
r = colval(cout,0)*solmat[0][0] + colval(cout,1)*solmat[1][0] |
558 |
< |
+ colval(cout,2)*solmat[2][0]; |
559 |
< |
if (r < 0) r = 0; |
560 |
< |
g = colval(cout,0)*solmat[0][1] + colval(cout,1)*solmat[1][1] |
561 |
< |
+ colval(cout,2)*solmat[2][1]; |
562 |
< |
if (g < 0) g = 0; |
563 |
< |
b = colval(cout,0)*solmat[0][2] + colval(cout,1)*solmat[1][2] |
367 |
< |
+ colval(cout,2)*solmat[2][2]; |
368 |
< |
if (b < 0) b = 0; |
369 |
< |
setcolor(cout, r, g, b); |
556 |
> |
if (scanning) { |
557 |
> |
bresp(ctmp, cin); |
558 |
> |
clipped = cresp(cout, ctmp); |
559 |
> |
} else { |
560 |
> |
clipped = cresp(ctmp, cin); |
561 |
> |
bresp(cout, ctmp); |
562 |
> |
} |
563 |
> |
return(clipped); |
564 |
|
} |
565 |
|
|
566 |
|
|
567 |
< |
putdebug() /* put out debugging picture */ |
567 |
> |
int |
568 |
> |
cresp(cout, cin) /* transform color according to matrix */ |
569 |
> |
COLOR cout, cin; |
570 |
|
{ |
571 |
+ |
colortrans(cout, solmat, cin); |
572 |
+ |
return(clipgamut(cout, bright(cout), CGAMUT, colmin, colmax)); |
573 |
+ |
} |
574 |
+ |
|
575 |
+ |
|
576 |
+ |
xyY2RGB(rgbout, xyYin) /* convert xyY to RGB */ |
577 |
+ |
COLOR rgbout; |
578 |
+ |
register float xyYin[3]; |
579 |
+ |
{ |
580 |
+ |
COLOR ctmp; |
581 |
+ |
double d; |
582 |
+ |
|
583 |
+ |
d = xyYin[2] / xyYin[1]; |
584 |
+ |
ctmp[0] = xyYin[0] * d; |
585 |
+ |
ctmp[1] = xyYin[2]; |
586 |
+ |
ctmp[2] = (1. - xyYin[0] - xyYin[1]) * d; |
587 |
+ |
/* allow negative values */ |
588 |
+ |
colortrans(rgbout, xyz2rgbmat, ctmp); |
589 |
+ |
} |
590 |
+ |
|
591 |
+ |
|
592 |
+ |
picdebug() /* put out debugging picture */ |
593 |
+ |
{ |
594 |
+ |
static COLOR blkcol = BLKCOLOR; |
595 |
|
COLOR *scan; |
596 |
< |
int y; |
597 |
< |
register int x, i; |
596 |
> |
int y, i; |
597 |
> |
register int x, rg; |
598 |
|
|
379 |
– |
if (debugfp == NULL) |
380 |
– |
return; |
599 |
|
if (fseek(stdin, 0L, 0) == EOF) { |
600 |
|
fprintf(stderr, "%s: cannot seek on input picture\n", progname); |
601 |
|
exit(1); |
609 |
|
exit(1); |
610 |
|
} |
611 |
|
/* finish debug header */ |
612 |
+ |
fputformat(COLRFMT, debugfp); |
613 |
|
putc('\n', debugfp); |
614 |
|
fprtresolu(xmax, ymax, debugfp); |
615 |
+ |
/* write debug picture */ |
616 |
|
for (y = ymax-1; y >= 0; y--) { |
617 |
|
if (freadscan(scan, xmax, stdin) < 0) { |
618 |
|
fprintf(stderr, "%s: error rereading input picture\n", |
620 |
|
exit(1); |
621 |
|
} |
622 |
|
for (x = 0; x < xmax; x++) { |
623 |
< |
i = chartndx(x, y); |
624 |
< |
if (i < 0) |
623 |
> |
rg = chartndx(x, y, &i); |
624 |
> |
if (rg == RG_CENT) { |
625 |
> |
if (!(1L<<i & gmtflags) || (x+y)&07) { |
626 |
> |
copycolor(scan[x], mbRGB[i]); |
627 |
> |
clipgamut(scan[x], bright(scan[x]), |
628 |
> |
CGAMUT, cblack, cwhite); |
629 |
> |
} else |
630 |
> |
copycolor(scan[x], blkcol); |
631 |
> |
} else if (rg == RG_CORR) |
632 |
|
cvtcolor(scan[x], scan[x]); |
633 |
< |
else |
634 |
< |
copycolor(scan[x], mbRGB[i]); |
633 |
> |
else if (rg != RG_ORIG) |
634 |
> |
copycolor(scan[x], blkcol); |
635 |
|
} |
636 |
|
if (fwritescan(scan, xmax, debugfp) < 0) { |
637 |
|
fprintf(stderr, "%s: error writing debugging picture\n", |
639 |
|
exit(1); |
640 |
|
} |
641 |
|
} |
642 |
+ |
/* clean up */ |
643 |
+ |
fclose(debugfp); |
644 |
+ |
free((char *)scan); |
645 |
+ |
} |
646 |
+ |
|
647 |
+ |
|
648 |
+ |
clrdebug() /* put out debug picture from color input */ |
649 |
+ |
{ |
650 |
+ |
static COLR blkclr = BLKCOLR; |
651 |
+ |
COLR mbclr[24], cvclr[24], orclr[24]; |
652 |
+ |
COLR *scan; |
653 |
+ |
COLOR ctmp, ct2; |
654 |
+ |
int y, i; |
655 |
+ |
register int x, rg; |
656 |
+ |
/* convert colors */ |
657 |
+ |
for (i = 0; i < 24; i++) { |
658 |
+ |
copycolor(ctmp, mbRGB[i]); |
659 |
+ |
clipgamut(ctmp, bright(ctmp), CGAMUT, cblack, cwhite); |
660 |
+ |
setcolr(mbclr[i], colval(ctmp,RED), |
661 |
+ |
colval(ctmp,GRN), colval(ctmp,BLU)); |
662 |
+ |
if (inpflags & 1L<<i) { |
663 |
+ |
copycolor(ctmp, inpRGB[i]); |
664 |
+ |
clipgamut(ctmp, bright(ctmp), CGAMUT, cblack, cwhite); |
665 |
+ |
setcolr(orclr[i], colval(ctmp,RED), |
666 |
+ |
colval(ctmp,GRN), colval(ctmp,BLU)); |
667 |
+ |
bresp(ctmp, inpRGB[i]); |
668 |
+ |
colortrans(ct2, solmat, ctmp); |
669 |
+ |
clipgamut(ct2, bright(ct2), CGAMUT, cblack, cwhite); |
670 |
+ |
setcolr(cvclr[i], colval(ct2,RED), |
671 |
+ |
colval(ct2,GRN), colval(ct2,BLU)); |
672 |
+ |
} |
673 |
+ |
} |
674 |
+ |
/* allocate scanline */ |
675 |
+ |
scan = (COLR *)malloc(xmax*sizeof(COLR)); |
676 |
+ |
if (scan == NULL) { |
677 |
+ |
perror(progname); |
678 |
+ |
exit(1); |
679 |
+ |
} |
680 |
+ |
/* finish debug header */ |
681 |
+ |
fputformat(COLRFMT, debugfp); |
682 |
+ |
putc('\n', debugfp); |
683 |
+ |
fprtresolu(xmax, ymax, debugfp); |
684 |
+ |
/* write debug picture */ |
685 |
+ |
for (y = ymax-1; y >= 0; y--) { |
686 |
+ |
for (x = 0; x < xmax; x++) { |
687 |
+ |
rg = chartndx(x, y, &i); |
688 |
+ |
if (rg == RG_CENT) { |
689 |
+ |
if (!(1L<<i & gmtflags) || (x+y)&07) |
690 |
+ |
copycolr(scan[x], mbclr[i]); |
691 |
+ |
else |
692 |
+ |
copycolr(scan[x], blkclr); |
693 |
+ |
} else if (rg == RG_BORD || !(1L<<i & inpflags)) |
694 |
+ |
copycolr(scan[x], blkclr); |
695 |
+ |
else if (rg == RG_ORIG) |
696 |
+ |
copycolr(scan[x], orclr[i]); |
697 |
+ |
else /* rg == RG_CORR */ |
698 |
+ |
copycolr(scan[x], cvclr[i]); |
699 |
+ |
} |
700 |
+ |
if (fwritecolrs(scan, xmax, debugfp) < 0) { |
701 |
+ |
fprintf(stderr, "%s: error writing debugging picture\n", |
702 |
+ |
progname); |
703 |
+ |
exit(1); |
704 |
+ |
} |
705 |
+ |
} |
706 |
+ |
/* clean up */ |
707 |
+ |
fclose(debugfp); |
708 |
|
free((char *)scan); |
709 |
|
} |