| 1 |
#ifndef lint |
| 2 |
static const char RCSid[] = "$Id: falsecolor.c,v 3.4 2005/11/16 08:30:15 greg Exp $"; |
| 3 |
#endif |
| 4 |
/* |
| 5 |
* False color mapping functions. |
| 6 |
* See falsecolor.h for detailed function descriptions. |
| 7 |
* |
| 8 |
* Externals declared in falsecolor.h |
| 9 |
*/ |
| 10 |
|
| 11 |
#include "copyright.h" |
| 12 |
|
| 13 |
#include <stdio.h> |
| 14 |
#include <math.h> |
| 15 |
#include <string.h> |
| 16 |
#include "tmprivat.h" |
| 17 |
#include "falsecolor.h" |
| 18 |
|
| 19 |
/* Initialize new false color mapping */ |
| 20 |
FCstruct * |
| 21 |
fcInit(BYTE fcscale[256][3]) |
| 22 |
{ |
| 23 |
FCstruct *fcs = (FCstruct *)malloc(sizeof(FCstruct)); |
| 24 |
|
| 25 |
if (fcs == NULL) |
| 26 |
return(NULL); |
| 27 |
fcs->mbrmin = 10; fcs->mbrmax = -10; |
| 28 |
fcs->lumap = NULL; |
| 29 |
if ((fcs->scale = fcscale) == NULL) |
| 30 |
fcs->scale = fcDefaultScale; |
| 31 |
return(fcs); |
| 32 |
} |
| 33 |
|
| 34 |
/* Assign fixed linear false color map */ |
| 35 |
int |
| 36 |
fcFixedLinear(FCstruct *fcs, double Lwmax) |
| 37 |
{ |
| 38 |
double mult; |
| 39 |
int i; |
| 40 |
|
| 41 |
if ((fcs == NULL) | (Lwmax <= MINLUM)) |
| 42 |
return(TM_E_ILLEGAL); |
| 43 |
if (fcs->lumap != NULL) |
| 44 |
free((void *)fcs->lumap); |
| 45 |
fcs->mbrmin = tmCvLuminance(Lwmax/256.); |
| 46 |
fcs->mbrmax = tmCvLuminance(Lwmax); |
| 47 |
fcs->lumap = (BYTE *)malloc(sizeof(BYTE)*(fcs->mbrmax - fcs->mbrmin + 1)); |
| 48 |
if (fcs->lumap == NULL) |
| 49 |
return(TM_E_NOMEM); |
| 50 |
mult = 255.999/tmLuminance(fcs->mbrmax); |
| 51 |
for (i = fcs->mbrmin; i <= fcs->mbrmax; i++) |
| 52 |
fcs->lumap[i - fcs->mbrmin] = (int)(mult * tmLuminance(i)); |
| 53 |
returnOK; |
| 54 |
} |
| 55 |
|
| 56 |
/* Assign fixed logarithmic false color map */ |
| 57 |
int |
| 58 |
fcFixedLog(FCstruct *fcs, double Lwmin, double Lwmax) |
| 59 |
{ |
| 60 |
int i; |
| 61 |
|
| 62 |
if ((fcs == NULL) | (Lwmin <= MINLUM) | (Lwmax <= Lwmin)) |
| 63 |
return(TM_E_ILLEGAL); |
| 64 |
if (fcs->lumap != NULL) |
| 65 |
free((void *)fcs->lumap); |
| 66 |
fcs->mbrmin = tmCvLuminance(Lwmin); |
| 67 |
fcs->mbrmax = tmCvLuminance(Lwmax); |
| 68 |
if (fcs->mbrmin >= fcs->mbrmax) { |
| 69 |
fcs->lumap = NULL; |
| 70 |
return(TM_E_ILLEGAL); |
| 71 |
} |
| 72 |
fcs->lumap = (BYTE *)malloc(sizeof(BYTE)*(fcs->mbrmax - fcs->mbrmin + 1)); |
| 73 |
if (fcs->lumap == NULL) |
| 74 |
return(TM_E_NOMEM); |
| 75 |
for (i = fcs->mbrmax - fcs->mbrmin; i >= 0; i--) |
| 76 |
fcs->lumap[i] = 256L * i / (fcs->mbrmax - fcs->mbrmin + 1); |
| 77 |
returnOK; |
| 78 |
} |
| 79 |
|
| 80 |
/* Compute linear false color map */ |
| 81 |
int |
| 82 |
fcLinearMapping(FCstruct *fcs, TMstruct *tms, double pctile) |
| 83 |
{ |
| 84 |
int i, histlen; |
| 85 |
int32 histot, cnt; |
| 86 |
int brt0; |
| 87 |
|
| 88 |
if ((fcs == NULL) | (tms == NULL) || (tms->histo == NULL) | |
| 89 |
(0 > pctile) | (pctile >= 50)) |
| 90 |
return(TM_E_ILLEGAL); |
| 91 |
i = (tms->hbrmin-MINBRT)/HISTEP; |
| 92 |
brt0 = MINBRT + HISTEP/2 + i*HISTEP; |
| 93 |
histlen = (tms->hbrmax-MINBRT)/HISTEP + 1 - i; |
| 94 |
histot = 0; |
| 95 |
for (i = histlen; i--; ) |
| 96 |
histot += tms->histo[i]; |
| 97 |
cnt = histot * pctile / 100; |
| 98 |
for (i = histlen; i--; ) |
| 99 |
if ((cnt -= tms->histo[i]) < 0) |
| 100 |
break; |
| 101 |
if (i <= 0) |
| 102 |
return(TM_E_TMFAIL); |
| 103 |
return(fcFixedLinear(fcs, tmLuminance(brt0 + i*HISTEP))); |
| 104 |
} |
| 105 |
|
| 106 |
/* Compute logarithmic false color map */ |
| 107 |
int |
| 108 |
fcLogMapping(FCstruct *fcs, TMstruct *tms, double pctile) |
| 109 |
{ |
| 110 |
int i, histlen; |
| 111 |
int32 histot, cnt; |
| 112 |
int brt0, wbrmin, wbrmax; |
| 113 |
|
| 114 |
if ((fcs == NULL) | (tms == NULL) || (tms->histo == NULL) | |
| 115 |
(0 > pctile) | (pctile >= 50)) |
| 116 |
return(TM_E_ILLEGAL); |
| 117 |
i = (tms->hbrmin-MINBRT)/HISTEP; |
| 118 |
brt0 = MINBRT + HISTEP/2 + i*HISTEP; |
| 119 |
histlen = (tms->hbrmax-MINBRT)/HISTEP + 1 - i; |
| 120 |
histot = 0; |
| 121 |
for (i = histlen; i--; ) |
| 122 |
histot += tms->histo[i]; |
| 123 |
cnt = histot * pctile / 100; |
| 124 |
for (i = 0; i < histlen; i++) |
| 125 |
if ((cnt -= tms->histo[i]) < 0) |
| 126 |
break; |
| 127 |
if (i >= histlen) |
| 128 |
return(TM_E_TMFAIL); |
| 129 |
wbrmin = brt0 + i*HISTEP; |
| 130 |
cnt = histot * pctile / 100; |
| 131 |
for (i = histlen; i--; ) |
| 132 |
if ((cnt -= tms->histo[i]) < 0) |
| 133 |
break; |
| 134 |
wbrmax = brt0 + i*HISTEP; |
| 135 |
if (wbrmax <= wbrmin) |
| 136 |
return(TM_E_TMFAIL); |
| 137 |
return(fcFixedLog(fcs, tmLuminance(wbrmin), tmLuminance(wbrmax))); |
| 138 |
} |
| 139 |
|
| 140 |
/* Apply false color mapping to pixel values */ |
| 141 |
int |
| 142 |
fcMapPixels(FCstruct *fcs, BYTE *ps, TMbright *ls, int len) |
| 143 |
{ |
| 144 |
int li; |
| 145 |
|
| 146 |
if (fcs == NULL || (fcs->lumap == NULL) | (fcs->scale == NULL)) |
| 147 |
return(TM_E_ILLEGAL); |
| 148 |
if ((ps == NULL) | (ls == NULL) | (len < 0)) |
| 149 |
return(TM_E_ILLEGAL); |
| 150 |
while (len--) { |
| 151 |
if ((li = *ls++) < fcs->mbrmin) |
| 152 |
li = 0; |
| 153 |
else if (li > fcs->mbrmax) |
| 154 |
li = 255; |
| 155 |
else |
| 156 |
li = fcs->lumap[li - fcs->mbrmin]; |
| 157 |
*ps++ = fcs->scale[li][RED]; |
| 158 |
*ps++ = fcs->scale[li][GRN]; |
| 159 |
*ps++ = fcs->scale[li][BLU]; |
| 160 |
} |
| 161 |
returnOK; |
| 162 |
} |
| 163 |
|
| 164 |
/* Determine if false color mapping is logarithmic */ |
| 165 |
int |
| 166 |
fcIsLogMap(FCstruct *fcs) |
| 167 |
{ |
| 168 |
int midval; |
| 169 |
|
| 170 |
if (fcs == NULL || fcs->lumap == NULL) |
| 171 |
return(-1); |
| 172 |
midval = fcs->lumap[(fcs->mbrmax - fcs->mbrmin)/2]; |
| 173 |
return((127 <= midval) & (midval <= 129)); |
| 174 |
} |
| 175 |
|
| 176 |
/* Duplicate a false color structure */ |
| 177 |
FCstruct * |
| 178 |
fcDup(FCstruct *fcs) |
| 179 |
{ |
| 180 |
FCstruct *fcnew; |
| 181 |
|
| 182 |
if (fcs == NULL) |
| 183 |
return(NULL); |
| 184 |
fcnew = fcInit(fcs->scale); |
| 185 |
if (fcnew == NULL) |
| 186 |
return(NULL); |
| 187 |
if (fcs->lumap != NULL) { |
| 188 |
fcnew->lumap = (BYTE *)malloc(sizeof(BYTE)*(fcs->mbrmax - |
| 189 |
fcs->mbrmin + 1)); |
| 190 |
if (fcnew->lumap == NULL) |
| 191 |
return(fcnew); |
| 192 |
fcnew->mbrmin = fcs->mbrmin; fcnew->mbrmax = fcs->mbrmax; |
| 193 |
memcpy((void *)fcnew->lumap, (void *)fcs->lumap, |
| 194 |
sizeof(BYTE)*(fcs->mbrmax - fcs->mbrmin + 1)); |
| 195 |
} |
| 196 |
return(fcnew); |
| 197 |
} |
| 198 |
|
| 199 |
/* Free data associated with the given false color mapping structure */ |
| 200 |
void |
| 201 |
fcDone(FCstruct *fcs) |
| 202 |
{ |
| 203 |
if (fcs == NULL) |
| 204 |
return; |
| 205 |
if (fcs->lumap != NULL) |
| 206 |
free((void *)fcs->lumap); |
| 207 |
free((void *)fcs); |
| 208 |
} |
| 209 |
|
| 210 |
BYTE fcDefaultScale[256][3] = { /* default false color scale */ |
| 211 |
111,8,132, |
| 212 |
108,7,133, |
| 213 |
105,7,134, |
| 214 |
102,6,136, |
| 215 |
98,6,137, |
| 216 |
93,5,139, |
| 217 |
89,4,141, |
| 218 |
84,3,143, |
| 219 |
79,2,145, |
| 220 |
74,1,148, |
| 221 |
68,0,150, |
| 222 |
63,0,153, |
| 223 |
57,0,155, |
| 224 |
52,0,157, |
| 225 |
46,0,160, |
| 226 |
41,0,162, |
| 227 |
36,0,164, |
| 228 |
31,0,166, |
| 229 |
26,0,168, |
| 230 |
22,0,170, |
| 231 |
18,0,172, |
| 232 |
14,2,174, |
| 233 |
11,4,175, |
| 234 |
8,7,176, |
| 235 |
7,9,177, |
| 236 |
6,11,177, |
| 237 |
5,13,178, |
| 238 |
4,16,178, |
| 239 |
3,18,179, |
| 240 |
2,21,180, |
| 241 |
1,24,180, |
| 242 |
1,28,181, |
| 243 |
0,31,181, |
| 244 |
0,35,182, |
| 245 |
0,38,182, |
| 246 |
0,42,183, |
| 247 |
0,46,184, |
| 248 |
0,50,184, |
| 249 |
0,54,184, |
| 250 |
0,58,185, |
| 251 |
0,63,185, |
| 252 |
0,67,186, |
| 253 |
0,71,186, |
| 254 |
0,76,186, |
| 255 |
0,80,187, |
| 256 |
0,84,187, |
| 257 |
0,89,187, |
| 258 |
0,93,187, |
| 259 |
1,97,187, |
| 260 |
1,102,187, |
| 261 |
1,106,187, |
| 262 |
2,110,187, |
| 263 |
2,114,187, |
| 264 |
3,118,186, |
| 265 |
3,122,186, |
| 266 |
4,126,186, |
| 267 |
4,130,185, |
| 268 |
4,133,185, |
| 269 |
5,137,184, |
| 270 |
5,140,183, |
| 271 |
6,143,182, |
| 272 |
6,146,181, |
| 273 |
6,149,180, |
| 274 |
7,151,179, |
| 275 |
7,154,178, |
| 276 |
7,156,177, |
| 277 |
8,158,175, |
| 278 |
8,161,172, |
| 279 |
9,163,169, |
| 280 |
9,165,165, |
| 281 |
9,167,161, |
| 282 |
9,169,157, |
| 283 |
10,170,153, |
| 284 |
10,172,148, |
| 285 |
10,173,143, |
| 286 |
11,174,138, |
| 287 |
11,174,133, |
| 288 |
11,175,127, |
| 289 |
12,175,122, |
| 290 |
12,176,117, |
| 291 |
13,176,111, |
| 292 |
14,176,106, |
| 293 |
14,176,101, |
| 294 |
15,175,95, |
| 295 |
16,175,90, |
| 296 |
17,175,86, |
| 297 |
18,174,81, |
| 298 |
20,174,77, |
| 299 |
21,173,73, |
| 300 |
22,172,69, |
| 301 |
24,172,66, |
| 302 |
26,171,63, |
| 303 |
28,170,60, |
| 304 |
30,169,58, |
| 305 |
32,168,57, |
| 306 |
34,167,56, |
| 307 |
37,166,55, |
| 308 |
40,165,54, |
| 309 |
42,164,54, |
| 310 |
45,163,54, |
| 311 |
48,162,55, |
| 312 |
52,160,55, |
| 313 |
55,158,56, |
| 314 |
58,157,57, |
| 315 |
62,155,57, |
| 316 |
66,153,59, |
| 317 |
69,152,60, |
| 318 |
73,150,61, |
| 319 |
77,148,63, |
| 320 |
81,146,64, |
| 321 |
84,144,66, |
| 322 |
88,142,67, |
| 323 |
92,139,69, |
| 324 |
96,137,70, |
| 325 |
99,135,72, |
| 326 |
103,133,73, |
| 327 |
107,131,75, |
| 328 |
110,128,76, |
| 329 |
113,126,77, |
| 330 |
117,124,78, |
| 331 |
120,121,79, |
| 332 |
123,119,80, |
| 333 |
126,117,80, |
| 334 |
128,114,81, |
| 335 |
131,112,81, |
| 336 |
133,110,81, |
| 337 |
135,108,80, |
| 338 |
136,106,80, |
| 339 |
137,105,80, |
| 340 |
138,104,79, |
| 341 |
139,102,79, |
| 342 |
140,101,79, |
| 343 |
141,100,78, |
| 344 |
142,98,78, |
| 345 |
143,96,77, |
| 346 |
144,95,76, |
| 347 |
144,93,76, |
| 348 |
145,92,75, |
| 349 |
146,90,74, |
| 350 |
146,89,73, |
| 351 |
147,87,73, |
| 352 |
148,85,72, |
| 353 |
148,84,71, |
| 354 |
149,82,70, |
| 355 |
149,80,69, |
| 356 |
150,79,68, |
| 357 |
150,77,67, |
| 358 |
151,75,66, |
| 359 |
151,73,65, |
| 360 |
151,72,64, |
| 361 |
152,70,63, |
| 362 |
152,68,62, |
| 363 |
153,66,61, |
| 364 |
153,65,60, |
| 365 |
153,63,59, |
| 366 |
154,61,58, |
| 367 |
154,60,57, |
| 368 |
154,58,56, |
| 369 |
154,56,55, |
| 370 |
155,55,54, |
| 371 |
155,53,53, |
| 372 |
155,51,51, |
| 373 |
156,50,50, |
| 374 |
156,48,49, |
| 375 |
156,46,48, |
| 376 |
157,45,47, |
| 377 |
157,43,46, |
| 378 |
157,42,45, |
| 379 |
158,40,44, |
| 380 |
158,39,43, |
| 381 |
158,37,42, |
| 382 |
159,36,41, |
| 383 |
159,34,40, |
| 384 |
159,33,39, |
| 385 |
160,32,38, |
| 386 |
160,31,37, |
| 387 |
161,29,37, |
| 388 |
161,28,36, |
| 389 |
162,27,35, |
| 390 |
162,26,34, |
| 391 |
163,25,33, |
| 392 |
163,24,33, |
| 393 |
164,23,32, |
| 394 |
165,22,31, |
| 395 |
165,21,31, |
| 396 |
168,18,29, |
| 397 |
170,16,28, |
| 398 |
172,13,26, |
| 399 |
175,11,25, |
| 400 |
177,9,24, |
| 401 |
180,7,23, |
| 402 |
183,5,22, |
| 403 |
185,3,21, |
| 404 |
188,2,21, |
| 405 |
191,1,20, |
| 406 |
194,0,19, |
| 407 |
197,0,19, |
| 408 |
199,0,18, |
| 409 |
202,0,17, |
| 410 |
205,0,17, |
| 411 |
207,0,16, |
| 412 |
210,2,16, |
| 413 |
213,3,15, |
| 414 |
215,6,14, |
| 415 |
217,8,13, |
| 416 |
219,11,13, |
| 417 |
220,13,12, |
| 418 |
222,17,11, |
| 419 |
224,20,11, |
| 420 |
226,24,10, |
| 421 |
227,28,9, |
| 422 |
229,32,8, |
| 423 |
231,37,7, |
| 424 |
232,42,6, |
| 425 |
234,47,5, |
| 426 |
236,52,5, |
| 427 |
237,57,4, |
| 428 |
239,63,3, |
| 429 |
240,68,2, |
| 430 |
242,74,2, |
| 431 |
243,79,1, |
| 432 |
245,85,0, |
| 433 |
246,91,0, |
| 434 |
247,96,0, |
| 435 |
248,102,0, |
| 436 |
250,108,0, |
| 437 |
251,113,0, |
| 438 |
252,118,0, |
| 439 |
253,123,0, |
| 440 |
254,128,0, |
| 441 |
254,133,0, |
| 442 |
255,138,0, |
| 443 |
255,143,1, |
| 444 |
255,148,2, |
| 445 |
255,154,3, |
| 446 |
255,159,4, |
| 447 |
255,165,6, |
| 448 |
255,170,7, |
| 449 |
255,176,9, |
| 450 |
255,181,11, |
| 451 |
255,187,13, |
| 452 |
255,192,15, |
| 453 |
255,198,17, |
| 454 |
255,203,20, |
| 455 |
255,208,22, |
| 456 |
255,213,24, |
| 457 |
255,218,26, |
| 458 |
255,223,28, |
| 459 |
255,227,30, |
| 460 |
255,232,32, |
| 461 |
255,236,34, |
| 462 |
254,240,35, |
| 463 |
254,243,37, |
| 464 |
254,246,38, |
| 465 |
254,249,39, |
| 466 |
254,252,40, |
| 467 |
}; |
