| 1 |
#ifndef lint |
| 2 |
static const char RCSid[] = "$Id: falsecolor.c,v 3.3 2005/11/15 20:04:50 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 |
119,10,140, |
| 212 |
116,10,142, |
| 213 |
112,10,144, |
| 214 |
109,9,146, |
| 215 |
105,9,148, |
| 216 |
101,8,150, |
| 217 |
97,7,151, |
| 218 |
92,7,153, |
| 219 |
88,6,155, |
| 220 |
83,5,157, |
| 221 |
77,4,158, |
| 222 |
72,2,160, |
| 223 |
67,2,162, |
| 224 |
64,4,164, |
| 225 |
61,5,166, |
| 226 |
58,6,168, |
| 227 |
55,6,170, |
| 228 |
51,7,171, |
| 229 |
47,8,173, |
| 230 |
43,8,175, |
| 231 |
38,9,177, |
| 232 |
33,9,179, |
| 233 |
25,10,180, |
| 234 |
14,10,182, |
| 235 |
10,17,183, |
| 236 |
10,22,183, |
| 237 |
9,27,184, |
| 238 |
9,30,184, |
| 239 |
8,33,185, |
| 240 |
8,36,185, |
| 241 |
7,39,186, |
| 242 |
6,41,187, |
| 243 |
5,43,187, |
| 244 |
4,45,188, |
| 245 |
3,47,188, |
| 246 |
0,50,189, |
| 247 |
0,57,189, |
| 248 |
0,62,189, |
| 249 |
0,67,190, |
| 250 |
0,72,190, |
| 251 |
0,77,190, |
| 252 |
0,81,191, |
| 253 |
0,84,191, |
| 254 |
1,88,191, |
| 255 |
1,92,192, |
| 256 |
1,95,192, |
| 257 |
1,98,192, |
| 258 |
2,102,192, |
| 259 |
3,107,192, |
| 260 |
3,112,192, |
| 261 |
4,116,191, |
| 262 |
5,120,191, |
| 263 |
5,124,191, |
| 264 |
5,128,191, |
| 265 |
6,131,191, |
| 266 |
6,135,190, |
| 267 |
7,138,190, |
| 268 |
7,141,190, |
| 269 |
7,145,189, |
| 270 |
8,147,188, |
| 271 |
8,150,186, |
| 272 |
9,153,185, |
| 273 |
9,155,183, |
| 274 |
10,158,181, |
| 275 |
10,160,180, |
| 276 |
11,163,178, |
| 277 |
11,165,176, |
| 278 |
11,167,175, |
| 279 |
12,170,173, |
| 280 |
12,172,171, |
| 281 |
13,173,168, |
| 282 |
13,174,164, |
| 283 |
14,175,160, |
| 284 |
14,176,156, |
| 285 |
15,177,152, |
| 286 |
15,178,147, |
| 287 |
16,178,143, |
| 288 |
16,179,138, |
| 289 |
17,180,133, |
| 290 |
17,181,127, |
| 291 |
18,182,122, |
| 292 |
18,182,116, |
| 293 |
20,182,112, |
| 294 |
22,181,109, |
| 295 |
24,181,105, |
| 296 |
26,180,102, |
| 297 |
27,180,98, |
| 298 |
29,179,94, |
| 299 |
30,179,90, |
| 300 |
32,178,86, |
| 301 |
33,177,81, |
| 302 |
34,177,77, |
| 303 |
35,176,71, |
| 304 |
37,176,67, |
| 305 |
42,174,67, |
| 306 |
46,173,66, |
| 307 |
49,171,66, |
| 308 |
52,170,65, |
| 309 |
55,169,65, |
| 310 |
58,167,65, |
| 311 |
61,166,64, |
| 312 |
64,164,64, |
| 313 |
66,163,63, |
| 314 |
68,161,63, |
| 315 |
71,160,63, |
| 316 |
75,158,63, |
| 317 |
79,156,64, |
| 318 |
84,154,65, |
| 319 |
88,151,66, |
| 320 |
92,149,68, |
| 321 |
95,147,69, |
| 322 |
99,145,70, |
| 323 |
102,142,71, |
| 324 |
105,140,71, |
| 325 |
109,137,72, |
| 326 |
112,135,73, |
| 327 |
115,132,74, |
| 328 |
118,130,74, |
| 329 |
121,128,74, |
| 330 |
123,126,74, |
| 331 |
126,124,74, |
| 332 |
129,121,75, |
| 333 |
132,119,75, |
| 334 |
134,117,75, |
| 335 |
137,114,75, |
| 336 |
139,112,75, |
| 337 |
142,109,75, |
| 338 |
144,106,75, |
| 339 |
146,104,75, |
| 340 |
147,103,74, |
| 341 |
148,101,73, |
| 342 |
149,100,72, |
| 343 |
150,98,71, |
| 344 |
151,96,70, |
| 345 |
152,95,70, |
| 346 |
152,93,69, |
| 347 |
153,91,68, |
| 348 |
154,90,67, |
| 349 |
155,88,66, |
| 350 |
156,86,65, |
| 351 |
157,84,64, |
| 352 |
158,83,63, |
| 353 |
158,81,62, |
| 354 |
159,79,60, |
| 355 |
160,77,59, |
| 356 |
161,75,58, |
| 357 |
161,73,57, |
| 358 |
162,71,55, |
| 359 |
163,69,54, |
| 360 |
163,67,52, |
| 361 |
164,65,51, |
| 362 |
165,63,49, |
| 363 |
165,61,48, |
| 364 |
166,60,47, |
| 365 |
166,58,46, |
| 366 |
167,56,44, |
| 367 |
167,55,43, |
| 368 |
168,53,42, |
| 369 |
169,51,40, |
| 370 |
169,49,39, |
| 371 |
170,46,37, |
| 372 |
170,44,35, |
| 373 |
171,42,33, |
| 374 |
171,40,32, |
| 375 |
172,39,31, |
| 376 |
172,37,30, |
| 377 |
173,36,29, |
| 378 |
173,34,28, |
| 379 |
174,33,27, |
| 380 |
174,31,25, |
| 381 |
175,29,24, |
| 382 |
175,27,22, |
| 383 |
176,25,21, |
| 384 |
176,23,19, |
| 385 |
177,21,17, |
| 386 |
178,20,16, |
| 387 |
179,19,16, |
| 388 |
179,18,15, |
| 389 |
180,17,14, |
| 390 |
181,16,13, |
| 391 |
182,15,13, |
| 392 |
182,13,12, |
| 393 |
183,12,11, |
| 394 |
184,10,9, |
| 395 |
185,8,8, |
| 396 |
185,5,6, |
| 397 |
187,3,5, |
| 398 |
189,3,5, |
| 399 |
191,3,5, |
| 400 |
193,3,6, |
| 401 |
195,3,6, |
| 402 |
197,2,6, |
| 403 |
198,2,6, |
| 404 |
200,2,6, |
| 405 |
202,2,6, |
| 406 |
204,1,6, |
| 407 |
206,1,6, |
| 408 |
208,0,6, |
| 409 |
209,9,7, |
| 410 |
211,13,7, |
| 411 |
213,15,8, |
| 412 |
214,18,8, |
| 413 |
216,20,9, |
| 414 |
218,21,9, |
| 415 |
219,23,9, |
| 416 |
221,24,10, |
| 417 |
223,26,10, |
| 418 |
224,27,10, |
| 419 |
226,28,11, |
| 420 |
228,33,11, |
| 421 |
229,43,11, |
| 422 |
231,50,11, |
| 423 |
232,56,11, |
| 424 |
234,61,11, |
| 425 |
235,66,11, |
| 426 |
237,71,11, |
| 427 |
238,75,11, |
| 428 |
239,79,11, |
| 429 |
241,83,11, |
| 430 |
242,86,11, |
| 431 |
244,90,11, |
| 432 |
245,96,11, |
| 433 |
246,102,12, |
| 434 |
247,108,12, |
| 435 |
248,114,13, |
| 436 |
249,119,13, |
| 437 |
250,124,13, |
| 438 |
251,129,14, |
| 439 |
252,134,14, |
| 440 |
253,138,15, |
| 441 |
254,143,15, |
| 442 |
255,147,15, |
| 443 |
255,151,16, |
| 444 |
255,157,18, |
| 445 |
255,163,20, |
| 446 |
255,169,22, |
| 447 |
255,174,24, |
| 448 |
255,179,25, |
| 449 |
255,184,26, |
| 450 |
255,189,28, |
| 451 |
255,194,29, |
| 452 |
255,199,30, |
| 453 |
255,203,31, |
| 454 |
255,207,32, |
| 455 |
255,212,34, |
| 456 |
255,216,35, |
| 457 |
255,220,37, |
| 458 |
255,224,38, |
| 459 |
255,227,40, |
| 460 |
255,231,41, |
| 461 |
255,235,42, |
| 462 |
254,238,43, |
| 463 |
254,242,44, |
| 464 |
254,245,46, |
| 465 |
254,249,47, |
| 466 |
254,252,48, |
| 467 |
}; |
