7 |
|
* 8/13/86 |
8 |
|
*/ |
9 |
|
|
10 |
< |
#include "standard.h" |
10 |
> |
#include "pfilt.h" |
11 |
|
|
12 |
– |
#include <string.h> |
13 |
– |
|
14 |
– |
#include "color.h" |
15 |
– |
|
12 |
|
#define RSCA 1.13 /* square-radius multiplier: sqrt(4/PI) */ |
13 |
|
#define TEPS 0.2 /* threshold proximity goal */ |
14 |
|
#define REPS 0.1 /* radius proximity goal */ |
15 |
|
|
20 |
– |
extern double CHECKRAD; /* radius over which gaussian is summed */ |
21 |
– |
|
22 |
– |
extern double rad; /* output pixel radius for filtering */ |
23 |
– |
|
24 |
– |
extern double thresh; /* maximum contribution for subpixel */ |
25 |
– |
|
26 |
– |
extern int nrows; /* number of rows for output */ |
27 |
– |
extern int ncols; /* number of columns for output */ |
28 |
– |
|
29 |
– |
extern int xres, yres; /* resolution of input */ |
30 |
– |
|
31 |
– |
extern double x_c, y_r; /* conversion factors */ |
32 |
– |
|
33 |
– |
extern int xrad; /* x search radius */ |
34 |
– |
extern int yrad; /* y search radius */ |
35 |
– |
extern int xbrad; /* x box size */ |
36 |
– |
extern int ybrad; /* y box size */ |
37 |
– |
|
38 |
– |
extern int barsize; /* size of input scan bar */ |
39 |
– |
extern COLOR **scanin; /* input scan bar */ |
40 |
– |
extern COLOR *scanout; /* output scan line */ |
41 |
– |
extern COLOR **scoutbar; /* output scan bar (if thresh > 0) */ |
42 |
– |
extern float **greybar; /* grey-averaged input values */ |
43 |
– |
extern int obarsize; /* size of output scan bar */ |
44 |
– |
extern int orad; /* output window radius */ |
45 |
– |
|
46 |
– |
extern int wrapfilt; /* wrap filter horizontally? */ |
47 |
– |
|
48 |
– |
extern char *progname; |
49 |
– |
|
16 |
|
float *gausstable; /* gauss lookup table */ |
17 |
|
|
18 |
|
float *ringsum; /* sum of ring values */ |
20 |
|
short *ringndx; /* ring index table */ |
21 |
|
float *warr; /* array of pixel weights */ |
22 |
|
|
23 |
< |
extern double (*ourbright)(); /* brightness computation function */ |
23 |
> |
#define lookgauss(x) gausstable[(int)(20.*(x)+.5)] |
24 |
|
|
25 |
< |
double pickfilt(); |
25 |
> |
static double pickfilt(double p0); |
26 |
> |
static void sumans(int px, int py, int rcent, int ccent, double m); |
27 |
|
|
61 |
– |
#define lookgauss(x) gausstable[(int)(10.*(x)+.5)] |
28 |
|
|
29 |
< |
|
30 |
< |
initmask() /* initialize gaussian lookup table */ |
29 |
> |
void |
30 |
> |
initmask(void) /* initialize gaussian lookup table */ |
31 |
|
{ |
32 |
|
int gtabsiz; |
33 |
|
double gaussN; |
34 |
|
double d; |
35 |
< |
register int x; |
35 |
> |
int x; |
36 |
|
|
37 |
< |
gtabsiz = 111*CHECKRAD*CHECKRAD; |
37 |
> |
gtabsiz = 444*CHECKRAD*CHECKRAD; |
38 |
|
gausstable = (float *)malloc(gtabsiz*sizeof(float)); |
39 |
|
if (gausstable == NULL) |
40 |
|
goto memerr; |
41 |
|
d = x_c*y_r*0.25/(rad*rad); |
42 |
|
gausstable[0] = exp(-d); |
43 |
|
for (x = 1; x < gtabsiz; x++) |
44 |
< |
if (x*0.1 <= d) |
44 |
> |
if (x*0.05 <= d) |
45 |
|
gausstable[x] = gausstable[0]; |
46 |
|
else |
47 |
< |
gausstable[x] = exp(-x*0.1); |
47 |
> |
gausstable[x] = exp(-x*0.05); |
48 |
|
if (obarsize == 0) |
49 |
|
return; |
50 |
|
/* compute integral of filter */ |
67 |
|
ringsum = (float *)malloc((orad+1)*sizeof(float)); |
68 |
|
ringwt = (short *)malloc((orad+1)*sizeof(short)); |
69 |
|
warr = (float *)malloc(obarsize*obarsize*sizeof(float)); |
70 |
< |
if (ringsum == NULL | ringwt == 0 | warr == NULL) |
70 |
> |
if ((ringsum == NULL) | (ringwt == 0) | (warr == NULL)) |
71 |
|
goto memerr; |
72 |
|
return; |
73 |
|
memerr: |
76 |
|
} |
77 |
|
|
78 |
|
|
79 |
< |
dobox(csum, xcent, ycent, c, r) /* simple box filter */ |
80 |
< |
COLOR csum; |
81 |
< |
int xcent, ycent; |
82 |
< |
int c, r; |
79 |
> |
void |
80 |
> |
dobox( /* simple box filter */ |
81 |
> |
SCOLOR csum, |
82 |
> |
int xcent, |
83 |
> |
int ycent, |
84 |
> |
int c, |
85 |
> |
int r |
86 |
> |
) |
87 |
|
{ |
88 |
|
int wsum; |
89 |
|
double d; |
90 |
|
int y; |
91 |
< |
register int x, offs; |
92 |
< |
register COLOR *scan; |
91 |
> |
int x, offs; |
92 |
> |
COLORV *scan, *scp; |
93 |
|
|
94 |
|
wsum = 0; |
95 |
< |
setcolor(csum, 0.0, 0.0, 0.0); |
95 |
> |
scolorblack(csum); |
96 |
|
for (y = ycent+1-ybrad; y <= ycent+ybrad; y++) { |
97 |
|
if (y < 0) continue; |
98 |
|
if (y >= yres) break; |
108 |
|
if (d < -0.5) continue; |
109 |
|
if (d >= 0.5) break; |
110 |
|
wsum++; |
111 |
< |
addcolor(csum, scan[x+offs]); |
111 |
> |
scp = scan + (x+offs)*NCSAMP; |
112 |
> |
saddscolor(csum, scp); |
113 |
|
} |
114 |
|
} |
115 |
|
if (wsum > 1) { |
116 |
|
d = 1.0/wsum; |
117 |
< |
scalecolor(csum, d); |
117 |
> |
scalescolor(csum, d); |
118 |
|
} |
119 |
|
} |
120 |
|
|
121 |
|
|
122 |
< |
dogauss(csum, xcent, ycent, c, r) /* gaussian filter */ |
123 |
< |
COLOR csum; |
124 |
< |
int xcent, ycent; |
125 |
< |
int c, r; |
122 |
> |
void |
123 |
> |
dogauss( /* gaussian filter */ |
124 |
> |
SCOLOR csum, |
125 |
> |
int xcent, |
126 |
> |
int ycent, |
127 |
> |
int c, |
128 |
> |
int r |
129 |
> |
) |
130 |
|
{ |
131 |
|
double dy, dx, weight, wsum; |
132 |
< |
COLOR ctmp; |
132 |
> |
SCOLOR ctmp; |
133 |
|
int y; |
134 |
< |
register int x, offs; |
135 |
< |
register COLOR *scan; |
134 |
> |
int x, offs; |
135 |
> |
COLORV *scan; |
136 |
|
|
137 |
|
wsum = FTINY; |
138 |
< |
setcolor(csum, 0.0, 0.0, 0.0); |
138 |
> |
scolorblack(csum); |
139 |
|
for (y = ycent-yrad; y <= ycent+yrad; y++) { |
140 |
|
if (y < 0) continue; |
141 |
|
if (y >= yres) break; |
148 |
|
dx = (x_c*(x+.5) - (c+.5))/rad; |
149 |
|
weight = lookgauss(dx*dx + dy*dy); |
150 |
|
wsum += weight; |
151 |
< |
copycolor(ctmp, scan[x+offs]); |
152 |
< |
scalecolor(ctmp, weight); |
153 |
< |
addcolor(csum, ctmp); |
151 |
> |
copyscolor(ctmp, scan+(x+offs)*NCSAMP); |
152 |
> |
scalescolor(ctmp, weight); |
153 |
> |
saddscolor(csum, ctmp); |
154 |
|
} |
155 |
|
} |
156 |
|
weight = 1.0/wsum; |
157 |
< |
scalecolor(csum, weight); |
157 |
> |
scalescolor(csum, weight); |
158 |
|
} |
159 |
|
|
160 |
|
|
161 |
< |
dothresh(xcent, ycent, ccent, rcent) /* gaussian threshold filter */ |
162 |
< |
int xcent, ycent; |
163 |
< |
int ccent, rcent; |
161 |
> |
void |
162 |
> |
dothresh( /* gaussian threshold filter */ |
163 |
> |
int xcent, |
164 |
> |
int ycent, |
165 |
> |
int ccent, |
166 |
> |
int rcent |
167 |
> |
) |
168 |
|
{ |
169 |
|
double d; |
170 |
|
int r, y, offs; |
171 |
< |
register int c, x; |
172 |
< |
register float *gscan; |
171 |
> |
int c, x; |
172 |
> |
float *gscan; |
173 |
|
/* compute ring sums */ |
174 |
|
memset((char *)ringsum, '\0', (orad+1)*sizeof(float)); |
175 |
|
memset((char *)ringwt, '\0', (orad+1)*sizeof(short)); |
203 |
|
if (d < -0.5) continue; |
204 |
|
if (d >= 0.5) break; |
205 |
|
sumans(x, y, rcent, ccent, |
206 |
< |
pickfilt((*ourbright)(scanin[y%barsize][x+offs]))); |
206 |
> |
pickfilt((*ourbright)(scanin[y%barsize]+(x+offs)*NCSAMP))); |
207 |
|
} |
208 |
|
} |
209 |
|
} |
210 |
|
|
211 |
|
|
212 |
< |
double |
213 |
< |
pickfilt(p0) /* find filter multiplier for p0 */ |
214 |
< |
double p0; |
212 |
> |
static double |
213 |
> |
pickfilt( /* find filter multiplier for p0 */ |
214 |
> |
double p0 |
215 |
> |
) |
216 |
|
{ |
217 |
|
double m = 1.0; |
218 |
|
double t, num, denom, avg, wsum; |
219 |
|
double mlimit[2]; |
220 |
|
int ilimit = 4.0/TEPS; |
221 |
< |
register int i; |
221 |
> |
int i; |
222 |
|
/* iterative search for m */ |
223 |
|
mlimit[0] = 1.0; mlimit[1] = orad/rad/CHECKRAD; |
224 |
|
do { |
270 |
|
} |
271 |
|
|
272 |
|
|
273 |
< |
sumans(px, py, rcent, ccent, m) /* sum input pixel to output */ |
274 |
< |
int px, py; |
275 |
< |
int rcent, ccent; |
276 |
< |
double m; |
273 |
> |
static void |
274 |
> |
sumans( /* sum input pixel to output */ |
275 |
> |
int px, |
276 |
> |
int py, |
277 |
> |
int rcent, |
278 |
> |
int ccent, |
279 |
> |
double m |
280 |
> |
) |
281 |
|
{ |
282 |
|
double dy2, dx; |
283 |
< |
COLOR pval, ctmp; |
283 |
> |
SCOLOR pval, ctmp; |
284 |
|
int ksiz, r, offs; |
285 |
|
double pc, pr, norm; |
286 |
< |
register int i, c; |
287 |
< |
register COLOR *scan; |
286 |
> |
int i, c; |
287 |
> |
COLORV *scan, *scp; |
288 |
|
/* |
289 |
|
* This normalization method fails at the picture borders because |
290 |
|
* a different number of input pixels contribute there. |
291 |
|
*/ |
292 |
< |
scan = scanin[py%barsize] + (px < 0 ? xres : px >= xres ? -xres : 0); |
293 |
< |
copycolor(pval, scan[px]); |
292 |
> |
scan = scanin[py%barsize] + (px < 0 ? xres : px >= xres ? -xres : 0)*NCSAMP; |
293 |
> |
copyscolor(pval, scan+px*NCSAMP); |
294 |
|
pc = x_c*(px+.5); |
295 |
|
pr = y_r*(py+.5); |
296 |
|
ksiz = CHECKRAD*m*rad + 1; |
323 |
|
scan = scoutbar[r%obarsize]; |
324 |
|
for (c = ccent-ksiz; c <= ccent+ksiz; c++) { |
325 |
|
offs = c < 0 ? ncols : c >= ncols ? -ncols : 0; |
326 |
< |
if (offs && !wrapfilt) |
326 |
> |
if ((offs != 0) & !wrapfilt) |
327 |
|
continue; |
328 |
< |
copycolor(ctmp, pval); |
328 |
> |
copyscolor(ctmp, pval); |
329 |
|
dx = norm*warr[i++]; |
330 |
< |
scalecolor(ctmp, dx); |
331 |
< |
addcolor(scan[c+offs], ctmp); |
330 |
> |
scalescolor(ctmp, dx); |
331 |
> |
scp = scan + (c+offs)*NCSAMP; |
332 |
> |
saddscolor(scp, ctmp); |
333 |
|
} |
334 |
|
} |
335 |
|
} |