1 |
greg |
3.1 |
#ifndef lint |
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greg |
3.6 |
static const char RCSid[] = "$Id: falsecolor.c,v 3.5 2005/11/18 22:50:20 greg Exp $"; |
3 |
greg |
3.1 |
#endif |
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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); |
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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); |
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greg |
3.1 |
for (i = fcs->mbrmin; i <= fcs->mbrmax; i++) |
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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); |
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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) |
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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) | |
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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; |
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greg |
3.1 |
histot = 0; |
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greg |
3.4 |
for (i = histlen; i--; ) |
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histot += tms->histo[i]; |
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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) |
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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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/* 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 |
3.6 |
(.0 > pctile) | (pctile >= 50.)) |
116 |
greg |
3.1 |
return(TM_E_ILLEGAL); |
117 |
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; |
120 |
greg |
3.1 |
histot = 0; |
121 |
greg |
3.4 |
for (i = histlen; i--; ) |
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histot += tms->histo[i]; |
123 |
greg |
3.6 |
cnt = histot * pctile * .01; |
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 |
3.6 |
cnt = histot * pctile * .01; |
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]; |
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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 |
greg |
3.6 |
int miderr; |
169 |
greg |
3.2 |
|
170 |
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if (fcs == NULL || fcs->lumap == NULL) |
171 |
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return(-1); |
172 |
greg |
3.6 |
|
173 |
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miderr = fcs->lumap[(fcs->mbrmax - fcs->mbrmin)/2] - |
174 |
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128L * (fcs->mbrmax - fcs->mbrmin) / |
175 |
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(fcs->mbrmax - fcs->mbrmin + 1); |
176 |
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177 |
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return((-1 <= miderr) & (miderr <= 1)); |
178 |
greg |
3.2 |
} |
179 |
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180 |
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/* Duplicate a false color structure */ |
181 |
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FCstruct * |
182 |
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fcDup(FCstruct *fcs) |
183 |
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{ |
184 |
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FCstruct *fcnew; |
185 |
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186 |
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if (fcs == NULL) |
187 |
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return(NULL); |
188 |
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fcnew = fcInit(fcs->scale); |
189 |
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if (fcnew == NULL) |
190 |
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return(NULL); |
191 |
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if (fcs->lumap != NULL) { |
192 |
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fcnew->lumap = (BYTE *)malloc(sizeof(BYTE)*(fcs->mbrmax - |
193 |
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fcs->mbrmin + 1)); |
194 |
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if (fcnew->lumap == NULL) |
195 |
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return(fcnew); |
196 |
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fcnew->mbrmin = fcs->mbrmin; fcnew->mbrmax = fcs->mbrmax; |
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memcpy((void *)fcnew->lumap, (void *)fcs->lumap, |
198 |
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sizeof(BYTE)*(fcs->mbrmax - fcs->mbrmin + 1)); |
199 |
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} |
200 |
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return(fcnew); |
201 |
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} |
202 |
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203 |
greg |
3.1 |
/* Free data associated with the given false color mapping structure */ |
204 |
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void |
205 |
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fcDone(FCstruct *fcs) |
206 |
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{ |
207 |
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if (fcs == NULL) |
208 |
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return; |
209 |
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if (fcs->lumap != NULL) |
210 |
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free((void *)fcs->lumap); |
211 |
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free((void *)fcs); |
212 |
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} |
213 |
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214 |
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BYTE fcDefaultScale[256][3] = { /* default false color scale */ |
215 |
greg |
3.5 |
111,8,132, |
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108,7,133, |
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105,7,134, |
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102,6,136, |
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98,6,137, |
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93,5,139, |
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89,4,141, |
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84,3,143, |
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79,2,145, |
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74,1,148, |
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68,0,150, |
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63,0,153, |
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57,0,155, |
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52,0,157, |
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46,0,160, |
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41,0,162, |
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36,0,164, |
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31,0,166, |
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26,0,168, |
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22,0,170, |
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18,0,172, |
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14,2,174, |
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11,4,175, |
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8,7,176, |
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7,9,177, |
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6,11,177, |
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5,13,178, |
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4,16,178, |
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3,18,179, |
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2,21,180, |
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1,24,180, |
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1,28,181, |
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0,31,181, |
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0,35,182, |
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0,38,182, |
250 |
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0,42,183, |
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0,46,184, |
252 |
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0,50,184, |
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0,54,184, |
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0,58,185, |
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0,63,185, |
256 |
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0,67,186, |
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0,71,186, |
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0,76,186, |
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0,80,187, |
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0,84,187, |
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0,89,187, |
262 |
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0,93,187, |
263 |
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1,97,187, |
264 |
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1,102,187, |
265 |
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1,106,187, |
266 |
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2,110,187, |
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2,114,187, |
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3,118,186, |
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3,122,186, |
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4,126,186, |
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4,130,185, |
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4,133,185, |
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5,137,184, |
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5,140,183, |
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6,143,182, |
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6,146,181, |
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6,149,180, |
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7,151,179, |
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7,154,178, |
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7,156,177, |
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8,158,175, |
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8,161,172, |
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9,163,169, |
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9,165,165, |
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9,167,161, |
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9,169,157, |
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10,170,153, |
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10,172,148, |
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10,173,143, |
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11,174,138, |
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11,174,133, |
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11,175,127, |
293 |
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12,175,122, |
294 |
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12,176,117, |
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13,176,111, |
296 |
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14,176,106, |
297 |
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14,176,101, |
298 |
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15,175,95, |
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16,175,90, |
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17,175,86, |
301 |
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18,174,81, |
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20,174,77, |
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21,173,73, |
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22,172,69, |
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24,172,66, |
306 |
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26,171,63, |
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28,170,60, |
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30,169,58, |
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32,168,57, |
310 |
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34,167,56, |
311 |
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37,166,55, |
312 |
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40,165,54, |
313 |
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42,164,54, |
314 |
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45,163,54, |
315 |
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48,162,55, |
316 |
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52,160,55, |
317 |
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55,158,56, |
318 |
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58,157,57, |
319 |
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62,155,57, |
320 |
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66,153,59, |
321 |
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69,152,60, |
322 |
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73,150,61, |
323 |
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77,148,63, |
324 |
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81,146,64, |
325 |
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84,144,66, |
326 |
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88,142,67, |
327 |
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92,139,69, |
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96,137,70, |
329 |
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99,135,72, |
330 |
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103,133,73, |
331 |
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107,131,75, |
332 |
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110,128,76, |
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113,126,77, |
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117,124,78, |
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120,121,79, |
336 |
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123,119,80, |
337 |
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126,117,80, |
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128,114,81, |
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131,112,81, |
340 |
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133,110,81, |
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135,108,80, |
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136,106,80, |
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137,105,80, |
344 |
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138,104,79, |
345 |
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139,102,79, |
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140,101,79, |
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141,100,78, |
348 |
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142,98,78, |
349 |
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143,96,77, |
350 |
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144,95,76, |
351 |
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144,93,76, |
352 |
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145,92,75, |
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146,90,74, |
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146,89,73, |
355 |
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147,87,73, |
356 |
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148,85,72, |
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148,84,71, |
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149,82,70, |
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149,80,69, |
360 |
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150,79,68, |
361 |
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150,77,67, |
362 |
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151,75,66, |
363 |
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151,73,65, |
364 |
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151,72,64, |
365 |
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152,70,63, |
366 |
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152,68,62, |
367 |
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153,66,61, |
368 |
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153,65,60, |
369 |
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153,63,59, |
370 |
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154,61,58, |
371 |
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154,60,57, |
372 |
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154,58,56, |
373 |
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154,56,55, |
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155,55,54, |
375 |
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155,53,53, |
376 |
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155,51,51, |
377 |
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156,50,50, |
378 |
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156,48,49, |
379 |
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156,46,48, |
380 |
|
|
157,45,47, |
381 |
|
|
157,43,46, |
382 |
|
|
157,42,45, |
383 |
|
|
158,40,44, |
384 |
|
|
158,39,43, |
385 |
|
|
158,37,42, |
386 |
|
|
159,36,41, |
387 |
|
|
159,34,40, |
388 |
|
|
159,33,39, |
389 |
|
|
160,32,38, |
390 |
|
|
160,31,37, |
391 |
|
|
161,29,37, |
392 |
|
|
161,28,36, |
393 |
|
|
162,27,35, |
394 |
|
|
162,26,34, |
395 |
|
|
163,25,33, |
396 |
|
|
163,24,33, |
397 |
|
|
164,23,32, |
398 |
|
|
165,22,31, |
399 |
|
|
165,21,31, |
400 |
|
|
168,18,29, |
401 |
|
|
170,16,28, |
402 |
|
|
172,13,26, |
403 |
|
|
175,11,25, |
404 |
|
|
177,9,24, |
405 |
|
|
180,7,23, |
406 |
|
|
183,5,22, |
407 |
|
|
185,3,21, |
408 |
|
|
188,2,21, |
409 |
|
|
191,1,20, |
410 |
|
|
194,0,19, |
411 |
|
|
197,0,19, |
412 |
|
|
199,0,18, |
413 |
|
|
202,0,17, |
414 |
|
|
205,0,17, |
415 |
|
|
207,0,16, |
416 |
|
|
210,2,16, |
417 |
|
|
213,3,15, |
418 |
|
|
215,6,14, |
419 |
|
|
217,8,13, |
420 |
|
|
219,11,13, |
421 |
|
|
220,13,12, |
422 |
|
|
222,17,11, |
423 |
|
|
224,20,11, |
424 |
|
|
226,24,10, |
425 |
|
|
227,28,9, |
426 |
|
|
229,32,8, |
427 |
|
|
231,37,7, |
428 |
|
|
232,42,6, |
429 |
|
|
234,47,5, |
430 |
|
|
236,52,5, |
431 |
|
|
237,57,4, |
432 |
|
|
239,63,3, |
433 |
|
|
240,68,2, |
434 |
|
|
242,74,2, |
435 |
|
|
243,79,1, |
436 |
|
|
245,85,0, |
437 |
|
|
246,91,0, |
438 |
|
|
247,96,0, |
439 |
|
|
248,102,0, |
440 |
|
|
250,108,0, |
441 |
|
|
251,113,0, |
442 |
|
|
252,118,0, |
443 |
|
|
253,123,0, |
444 |
|
|
254,128,0, |
445 |
|
|
254,133,0, |
446 |
|
|
255,138,0, |
447 |
|
|
255,143,1, |
448 |
|
|
255,148,2, |
449 |
|
|
255,154,3, |
450 |
|
|
255,159,4, |
451 |
|
|
255,165,6, |
452 |
|
|
255,170,7, |
453 |
|
|
255,176,9, |
454 |
|
|
255,181,11, |
455 |
|
|
255,187,13, |
456 |
|
|
255,192,15, |
457 |
|
|
255,198,17, |
458 |
|
|
255,203,20, |
459 |
|
|
255,208,22, |
460 |
|
|
255,213,24, |
461 |
|
|
255,218,26, |
462 |
|
|
255,223,28, |
463 |
|
|
255,227,30, |
464 |
|
|
255,232,32, |
465 |
|
|
255,236,34, |
466 |
|
|
254,240,35, |
467 |
|
|
254,243,37, |
468 |
|
|
254,246,38, |
469 |
|
|
254,249,39, |
470 |
|
|
254,252,40, |
471 |
greg |
3.1 |
}; |