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 |
}; |