1 |
greg |
3.1 |
#ifndef lint |
2 |
greg |
3.4 |
static const char RCSid[] = "$Id: falsecolor.c,v 3.3 2005/11/15 20:04:50 greg Exp $"; |
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greg |
3.1 |
#endif |
4 |
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/* |
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* False color mapping functions. |
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* See falsecolor.h for detailed function descriptions. |
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* |
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* Externals declared in falsecolor.h |
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*/ |
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#include "copyright.h" |
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#include <stdio.h> |
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#include <math.h> |
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greg |
3.2 |
#include <string.h> |
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greg |
3.1 |
#include "tmprivat.h" |
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#include "falsecolor.h" |
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/* Initialize new false color mapping */ |
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FCstruct * |
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fcInit(BYTE fcscale[256][3]) |
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{ |
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FCstruct *fcs = (FCstruct *)malloc(sizeof(FCstruct)); |
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if (fcs == NULL) |
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return(NULL); |
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fcs->mbrmin = 10; fcs->mbrmax = -10; |
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fcs->lumap = NULL; |
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if ((fcs->scale = fcscale) == NULL) |
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fcs->scale = fcDefaultScale; |
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return(fcs); |
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} |
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/* Assign fixed linear false color map */ |
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int |
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fcFixedLinear(FCstruct *fcs, double Lwmax) |
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{ |
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greg |
3.2 |
double mult; |
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greg |
3.1 |
int i; |
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if ((fcs == NULL) | (Lwmax <= MINLUM)) |
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return(TM_E_ILLEGAL); |
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if (fcs->lumap != NULL) |
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free((void *)fcs->lumap); |
45 |
greg |
3.2 |
fcs->mbrmin = tmCvLuminance(Lwmax/256.); |
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fcs->mbrmax = tmCvLuminance(Lwmax); |
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greg |
3.1 |
fcs->lumap = (BYTE *)malloc(sizeof(BYTE)*(fcs->mbrmax - fcs->mbrmin + 1)); |
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if (fcs->lumap == NULL) |
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return(TM_E_NOMEM); |
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greg |
3.2 |
mult = 255.999/tmLuminance(fcs->mbrmax); |
51 |
greg |
3.1 |
for (i = fcs->mbrmin; i <= fcs->mbrmax; i++) |
52 |
greg |
3.3 |
fcs->lumap[i - fcs->mbrmin] = (int)(mult * tmLuminance(i)); |
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greg |
3.1 |
returnOK; |
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} |
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/* Assign fixed logarithmic false color map */ |
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int |
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fcFixedLog(FCstruct *fcs, double Lwmin, double Lwmax) |
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{ |
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int i; |
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if ((fcs == NULL) | (Lwmin <= MINLUM) | (Lwmax <= Lwmin)) |
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return(TM_E_ILLEGAL); |
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if (fcs->lumap != NULL) |
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free((void *)fcs->lumap); |
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greg |
3.2 |
fcs->mbrmin = tmCvLuminance(Lwmin); |
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fcs->mbrmax = tmCvLuminance(Lwmax); |
68 |
greg |
3.4 |
if (fcs->mbrmin >= fcs->mbrmax) { |
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fcs->lumap = NULL; |
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return(TM_E_ILLEGAL); |
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} |
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greg |
3.1 |
fcs->lumap = (BYTE *)malloc(sizeof(BYTE)*(fcs->mbrmax - fcs->mbrmin + 1)); |
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if (fcs->lumap == NULL) |
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return(TM_E_NOMEM); |
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greg |
3.3 |
for (i = fcs->mbrmax - fcs->mbrmin; i >= 0; i--) |
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fcs->lumap[i] = 256L * i / (fcs->mbrmax - fcs->mbrmin + 1); |
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greg |
3.1 |
returnOK; |
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} |
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/* Compute linear false color map */ |
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int |
82 |
greg |
3.3 |
fcLinearMapping(FCstruct *fcs, TMstruct *tms, double pctile) |
83 |
greg |
3.1 |
{ |
84 |
greg |
3.4 |
int i, histlen; |
85 |
greg |
3.1 |
int32 histot, cnt; |
86 |
greg |
3.4 |
int brt0; |
87 |
greg |
3.1 |
|
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if ((fcs == NULL) | (tms == NULL) || (tms->histo == NULL) | |
89 |
greg |
3.3 |
(0 > pctile) | (pctile >= 50)) |
90 |
greg |
3.1 |
return(TM_E_ILLEGAL); |
91 |
greg |
3.4 |
i = (tms->hbrmin-MINBRT)/HISTEP; |
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brt0 = MINBRT + HISTEP/2 + i*HISTEP; |
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histlen = (tms->hbrmax-MINBRT)/HISTEP + 1 - i; |
94 |
greg |
3.1 |
histot = 0; |
95 |
greg |
3.4 |
for (i = histlen; i--; ) |
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histot += tms->histo[i]; |
97 |
greg |
3.1 |
cnt = histot * pctile / 100; |
98 |
greg |
3.4 |
for (i = histlen; i--; ) |
99 |
greg |
3.1 |
if ((cnt -= tms->histo[i]) < 0) |
100 |
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break; |
101 |
greg |
3.4 |
if (i <= 0) |
102 |
greg |
3.1 |
return(TM_E_TMFAIL); |
103 |
greg |
3.4 |
return(fcFixedLinear(fcs, tmLuminance(brt0 + i*HISTEP))); |
104 |
greg |
3.1 |
} |
105 |
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106 |
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/* Compute logarithmic false color map */ |
107 |
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int |
108 |
greg |
3.3 |
fcLogMapping(FCstruct *fcs, TMstruct *tms, double pctile) |
109 |
greg |
3.1 |
{ |
110 |
greg |
3.4 |
int i, histlen; |
111 |
greg |
3.1 |
int32 histot, cnt; |
112 |
greg |
3.4 |
int brt0, wbrmin, wbrmax; |
113 |
greg |
3.1 |
|
114 |
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if ((fcs == NULL) | (tms == NULL) || (tms->histo == NULL) | |
115 |
greg |
3.3 |
(0 > pctile) | (pctile >= 50)) |
116 |
greg |
3.1 |
return(TM_E_ILLEGAL); |
117 |
greg |
3.4 |
i = (tms->hbrmin-MINBRT)/HISTEP; |
118 |
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brt0 = MINBRT + HISTEP/2 + i*HISTEP; |
119 |
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histlen = (tms->hbrmax-MINBRT)/HISTEP + 1 - i; |
120 |
greg |
3.1 |
histot = 0; |
121 |
greg |
3.4 |
for (i = histlen; i--; ) |
122 |
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histot += tms->histo[i]; |
123 |
greg |
3.1 |
cnt = histot * pctile / 100; |
124 |
greg |
3.4 |
for (i = 0; i < histlen; i++) |
125 |
greg |
3.1 |
if ((cnt -= tms->histo[i]) < 0) |
126 |
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break; |
127 |
greg |
3.4 |
if (i >= histlen) |
128 |
greg |
3.1 |
return(TM_E_TMFAIL); |
129 |
greg |
3.4 |
wbrmin = brt0 + i*HISTEP; |
130 |
greg |
3.1 |
cnt = histot * pctile / 100; |
131 |
greg |
3.4 |
for (i = histlen; i--; ) |
132 |
greg |
3.1 |
if ((cnt -= tms->histo[i]) < 0) |
133 |
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break; |
134 |
greg |
3.4 |
wbrmax = brt0 + i*HISTEP; |
135 |
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if (wbrmax <= wbrmin) |
136 |
greg |
3.1 |
return(TM_E_TMFAIL); |
137 |
greg |
3.2 |
return(fcFixedLog(fcs, tmLuminance(wbrmin), tmLuminance(wbrmax))); |
138 |
greg |
3.1 |
} |
139 |
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140 |
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/* Apply false color mapping to pixel values */ |
141 |
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int |
142 |
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fcMapPixels(FCstruct *fcs, BYTE *ps, TMbright *ls, int len) |
143 |
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{ |
144 |
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int li; |
145 |
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146 |
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if (fcs == NULL || (fcs->lumap == NULL) | (fcs->scale == NULL)) |
147 |
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return(TM_E_ILLEGAL); |
148 |
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if ((ps == NULL) | (ls == NULL) | (len < 0)) |
149 |
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return(TM_E_ILLEGAL); |
150 |
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while (len--) { |
151 |
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if ((li = *ls++) < fcs->mbrmin) |
152 |
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li = 0; |
153 |
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else if (li > fcs->mbrmax) |
154 |
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li = 255; |
155 |
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else |
156 |
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li = fcs->lumap[li - fcs->mbrmin]; |
157 |
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*ps++ = fcs->scale[li][RED]; |
158 |
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*ps++ = fcs->scale[li][GRN]; |
159 |
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*ps++ = fcs->scale[li][BLU]; |
160 |
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} |
161 |
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returnOK; |
162 |
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} |
163 |
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164 |
greg |
3.2 |
/* Determine if false color mapping is logarithmic */ |
165 |
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int |
166 |
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fcIsLogMap(FCstruct *fcs) |
167 |
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{ |
168 |
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int midval; |
169 |
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170 |
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if (fcs == NULL || fcs->lumap == NULL) |
171 |
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return(-1); |
172 |
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midval = fcs->lumap[(fcs->mbrmax - fcs->mbrmin)/2]; |
173 |
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return((127 <= midval) & (midval <= 129)); |
174 |
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} |
175 |
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176 |
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/* Duplicate a false color structure */ |
177 |
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FCstruct * |
178 |
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fcDup(FCstruct *fcs) |
179 |
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{ |
180 |
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FCstruct *fcnew; |
181 |
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182 |
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if (fcs == NULL) |
183 |
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return(NULL); |
184 |
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fcnew = fcInit(fcs->scale); |
185 |
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if (fcnew == NULL) |
186 |
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return(NULL); |
187 |
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if (fcs->lumap != NULL) { |
188 |
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fcnew->lumap = (BYTE *)malloc(sizeof(BYTE)*(fcs->mbrmax - |
189 |
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fcs->mbrmin + 1)); |
190 |
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if (fcnew->lumap == NULL) |
191 |
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return(fcnew); |
192 |
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fcnew->mbrmin = fcs->mbrmin; fcnew->mbrmax = fcs->mbrmax; |
193 |
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memcpy((void *)fcnew->lumap, (void *)fcs->lumap, |
194 |
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sizeof(BYTE)*(fcs->mbrmax - fcs->mbrmin + 1)); |
195 |
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} |
196 |
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return(fcnew); |
197 |
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} |
198 |
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199 |
greg |
3.1 |
/* Free data associated with the given false color mapping structure */ |
200 |
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void |
201 |
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fcDone(FCstruct *fcs) |
202 |
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{ |
203 |
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if (fcs == NULL) |
204 |
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return; |
205 |
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if (fcs->lumap != NULL) |
206 |
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free((void *)fcs->lumap); |
207 |
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free((void *)fcs); |
208 |
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} |
209 |
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210 |
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BYTE fcDefaultScale[256][3] = { /* default false color scale */ |
211 |
greg |
3.3 |
119,10,140, |
212 |
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116,10,142, |
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112,10,144, |
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109,9,146, |
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105,9,148, |
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101,8,150, |
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97,7,151, |
218 |
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92,7,153, |
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88,6,155, |
220 |
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83,5,157, |
221 |
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77,4,158, |
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72,2,160, |
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67,2,162, |
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64,4,164, |
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61,5,166, |
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58,6,168, |
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55,6,170, |
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51,7,171, |
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47,8,173, |
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43,8,175, |
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38,9,177, |
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33,9,179, |
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25,10,180, |
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14,10,182, |
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10,17,183, |
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10,22,183, |
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9,27,184, |
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9,30,184, |
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8,33,185, |
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8,36,185, |
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7,39,186, |
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6,41,187, |
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5,43,187, |
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4,45,188, |
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3,47,188, |
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0,50,189, |
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0,57,189, |
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0,62,189, |
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0,67,190, |
250 |
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0,72,190, |
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0,77,190, |
252 |
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0,81,191, |
253 |
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0,84,191, |
254 |
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1,88,191, |
255 |
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1,92,192, |
256 |
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1,95,192, |
257 |
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1,98,192, |
258 |
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2,102,192, |
259 |
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3,107,192, |
260 |
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3,112,192, |
261 |
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4,116,191, |
262 |
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5,120,191, |
263 |
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5,124,191, |
264 |
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5,128,191, |
265 |
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6,131,191, |
266 |
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6,135,190, |
267 |
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7,138,190, |
268 |
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7,141,190, |
269 |
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7,145,189, |
270 |
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8,147,188, |
271 |
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8,150,186, |
272 |
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9,153,185, |
273 |
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9,155,183, |
274 |
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10,158,181, |
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10,160,180, |
276 |
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11,163,178, |
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11,165,176, |
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11,167,175, |
279 |
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12,170,173, |
280 |
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12,172,171, |
281 |
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13,173,168, |
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13,174,164, |
283 |
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14,175,160, |
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14,176,156, |
285 |
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15,177,152, |
286 |
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15,178,147, |
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16,178,143, |
288 |
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16,179,138, |
289 |
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17,180,133, |
290 |
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17,181,127, |
291 |
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18,182,122, |
292 |
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18,182,116, |
293 |
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20,182,112, |
294 |
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22,181,109, |
295 |
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24,181,105, |
296 |
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26,180,102, |
297 |
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27,180,98, |
298 |
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29,179,94, |
299 |
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30,179,90, |
300 |
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32,178,86, |
301 |
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33,177,81, |
302 |
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34,177,77, |
303 |
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35,176,71, |
304 |
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37,176,67, |
305 |
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42,174,67, |
306 |
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46,173,66, |
307 |
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49,171,66, |
308 |
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52,170,65, |
309 |
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55,169,65, |
310 |
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58,167,65, |
311 |
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61,166,64, |
312 |
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64,164,64, |
313 |
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66,163,63, |
314 |
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68,161,63, |
315 |
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71,160,63, |
316 |
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75,158,63, |
317 |
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79,156,64, |
318 |
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84,154,65, |
319 |
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88,151,66, |
320 |
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92,149,68, |
321 |
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95,147,69, |
322 |
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99,145,70, |
323 |
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102,142,71, |
324 |
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105,140,71, |
325 |
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109,137,72, |
326 |
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112,135,73, |
327 |
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115,132,74, |
328 |
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118,130,74, |
329 |
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121,128,74, |
330 |
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123,126,74, |
331 |
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126,124,74, |
332 |
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129,121,75, |
333 |
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132,119,75, |
334 |
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134,117,75, |
335 |
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137,114,75, |
336 |
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139,112,75, |
337 |
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142,109,75, |
338 |
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144,106,75, |
339 |
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146,104,75, |
340 |
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147,103,74, |
341 |
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148,101,73, |
342 |
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149,100,72, |
343 |
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150,98,71, |
344 |
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151,96,70, |
345 |
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152,95,70, |
346 |
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152,93,69, |
347 |
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153,91,68, |
348 |
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154,90,67, |
349 |
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155,88,66, |
350 |
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156,86,65, |
351 |
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157,84,64, |
352 |
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158,83,63, |
353 |
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158,81,62, |
354 |
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159,79,60, |
355 |
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160,77,59, |
356 |
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161,75,58, |
357 |
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161,73,57, |
358 |
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162,71,55, |
359 |
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163,69,54, |
360 |
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163,67,52, |
361 |
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164,65,51, |
362 |
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165,63,49, |
363 |
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165,61,48, |
364 |
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166,60,47, |
365 |
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166,58,46, |
366 |
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167,56,44, |
367 |
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167,55,43, |
368 |
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168,53,42, |
369 |
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169,51,40, |
370 |
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169,49,39, |
371 |
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170,46,37, |
372 |
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170,44,35, |
373 |
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171,42,33, |
374 |
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171,40,32, |
375 |
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172,39,31, |
376 |
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172,37,30, |
377 |
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173,36,29, |
378 |
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173,34,28, |
379 |
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174,33,27, |
380 |
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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 |
greg |
3.1 |
}; |