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comparison Meerwald/gen_dugad_sig.c @ 0:be303a3f5ea8

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import
author Peter Meerwald <pmeerw@cosy.sbg.ac.at>
date Sun, 12 Aug 2007 13:14:34 +0200
parents
children f83ef905a63d
comparison
equal deleted inserted replaced
-1:000000000000 0:be303a3f5ea8
1 #include "wm.h"
2
3 char *progname;
4
5 void usage(void) {
6 fprintf(stderr, "usage: %s [-a n] [-e n] [-f n] [-F file] [-l n] [-n n] [-o file] [-s file] [-S n] [-t n] [-T n]\n\n", progname);
7 fprintf(stderr, "\t-a n\t\talpha factor (default 0.2)\n");
8 fprintf(stderr, "\t-d n\t\tdeviation (default 1.0)\n");
9 fprintf(stderr, "\t-e n\t\twavelet filtering method (default 2)\n");
10 fprintf(stderr, "\t-f n\t\tfilter number (default 1)\n");
11 fprintf(stderr, "\t-F file\t\tfilter definition file (default 'filter.dat')\n");
12 fprintf(stderr, "\t-h\t\tprint usage\n");
13 fprintf(stderr, "\t-l n\t\tdecomposition levels (default 3)\n");
14 fprintf(stderr, "\t-m n \t\tmean value (default 0.0)\n");
15 fprintf(stderr, "\t-n n\t\twatermark length (default 1000)\n");
16 fprintf(stderr, "\t-o file\t\toutput file\n");
17 fprintf(stderr, "\t-s file\t\tsignature to embed in input image\n");
18 fprintf(stderr, "\t-S n\t\tseed\n");
19 fprintf(stderr, "\t-t n\t\tcasting threshold (default 40.0)\n");
20 fprintf(stderr, "\t-T n\t\tdetection threshold (default 50.0)\n");
21 exit(0);
22 }
23
24 int main(int argc, char *argv[]) {
25 FILE *out = stdout;
26 FILE *sig = NULL;
27
28 char output_name[MAXPATHLEN] = "(stdout)";
29 char signature_name[MAXPATHLEN];
30
31 int c;
32 int i;
33 int n = 1000;
34 int s = 0;
35 int e = 2;
36 int f = 1;
37 int l = 3;
38 char F[MAXPATHLEN] = "filter.dat";
39 double a = 0.2;
40 double t1 = 40.0;
41 double t2 = 50.0;
42 double m = 0.0;
43 double d = 1.0;
44
45 progname = argv[0];
46
47 while ((c = getopt(argc, argv, "a:b:d:e:f:F:h?l:m:n:o:s:S:t:T:")) != EOF) {
48 switch (c) {
49 case 'a':
50 a = atof(optarg);
51 if (a <= 0.0) {
52 fprintf(stderr, "%s: alpha factor %f out of range\n", progname, a);
53 exit(1);
54 }
55 break;
56 case 'd':
57 d = atof(optarg);
58 if (d <= 0.0) {
59 fprintf(stderr, "%s: deviation %f out of range\n", progname, d);
60 exit(1);
61 }
62 break;
63
64 case 'e':
65 e = atoi(optarg);
66 if (e < 0) {
67 fprintf(stderr, "%s: wavelet filtering method %d out of range\n", progname, e);
68 }
69 break;
70 case 'f':
71 f = atoi(optarg);
72 if (f <= 0) {
73 fprintf(stderr, "%s: filter number %d out of range\n", progname, f);
74 exit(1);
75 }
76 break;
77 case 'F':
78 strcpy(F, optarg);
79 break;
80 case 'h':
81 case '?':
82 usage();
83 break;
84 case 'l':
85 l = atoi(optarg);
86 if (l <= 0) {
87 fprintf(stderr, "%s: decomposition level %d out of range\n", l);
88 exit(1);
89 }
90 break;
91 case 'm':
92 m = atof(optarg);
93 break;
94 case 'n':
95 n = atoi(optarg);
96 if (n < 1 || n > 32000) {
97 fprintf(stderr, "%s: watermark length %d out of range\n", progname, n);
98 exit(1);
99 }
100 break;
101 case 'o':
102 if ((out = fopen(optarg, "w")) == NULL) {
103 fprintf(stderr, "%s: unable to open output file %s\n", progname, optarg);
104 exit(1);
105 }
106 strcpy(output_name, optarg);
107 break;
108 case 's':
109 if ((sig = fopen(optarg, "r")) == NULL) {
110 fprintf(stderr, "%s: unable to open signature file %s\n", progname, optarg);
111 exit(1);
112 }
113 strcpy(signature_name, optarg);
114 break;
115 case 'S':
116 s = atoi(optarg);
117 break;
118 case 't':
119 t1 = atof(optarg);
120 if (t1 <= 0.0) {
121 fprintf(stderr, "%s: casting threshold %f out of range\n", progname, t1);
122 exit(1);
123 }
124 break;
125 case 'T':
126 t2 = atof(optarg);
127 if (t2 <= 0.0) {
128 fprintf(stderr, "%s: detection threshold %f out of range\n", progname, t2);
129 exit(1);
130 }
131 break;
132 }
133 }
134
135 argc -= optind;
136 argv += optind;
137
138 if (argc > 0) {
139 usage();
140 exit(1);
141 }
142
143 if (sig) {
144 char line[32];
145 fgets(line, sizeof(line), sig);
146 if (strspn(line, "DGSG") >= 4) {
147 if (n == 0)
148 fscanf(sig, "%d\n", &n);
149 else
150 fscanf(sig, "%*d\n");
151 if (l == 0)
152 fscanf(sig, "%d\n", &l);
153 else
154 fscanf(sig, "%*d\n");
155 if (a == 0.0)
156 fscanf(sig, "%lf\n", &a);
157 else
158 fscanf(sig, "%*lf\n");
159 if (t1 == 0.0)
160 fscanf(sig, "%lf\n", &t1);
161 else
162 fscanf(sig, "%*lf\n");
163 if (t2 == 0.0)
164 fscanf(sig, "%lf\n", &t2);
165 else
166 fscanf(sig, "%*lf\n");
167 if (e < 0)
168 fscanf(sig, "%d\n", &e);
169 else
170 fscanf(sig, "%*d\n");
171 if (f == 0)
172 fscanf(sig, "%d\n", &f);
173 else
174 fscanf(sig, "%*d\n");
175 if (!strcmp(F, ""))
176 fscanf(sig, "%[^\n\r]\n", &F);
177 else
178 fscanf(sig, "%*[^\n\r]\n");
179 }
180 else {
181 fprintf(stderr, "%s: invalid signature file %s\n", progname, signature_name);
182 exit(1);
183 }
184 }
185
186 if (s)
187 srandom(s);
188 else
189 srandom(time(NULL) * getpid());
190
191 fprintf(out, "DGSG\n");
192 fprintf(out, "%d\n", n);
193 fprintf(out, "%d\n", l);
194 fprintf(out, "%f\n", a);
195 fprintf(out, "%f\n", t1);
196 fprintf(out, "%f\n", t2);
197 fprintf(out, "%d\n", e);
198 fprintf(out, "%d\n", f);
199 fprintf(out, "%s\n", F);
200
201 n >>= 1;
202 while (n > 0) {
203 double x;
204 double x1, x2;
205
206 /*
207 * Algorithm P (Polar method for normal deviates),
208 * Knuth, D., "The Art of Computer Programming", Vol. 2, 3rd Edition, p. 122
209 */
210 do {
211 x1 = 2.0 * ((random() & RAND_MAX) / ((double) RAND_MAX + 1.0)) - 1.0;
212 x2 = 2.0 * ((random() & RAND_MAX) / ((double) RAND_MAX + 1.0)) - 1.0;
213 x = x1 * x1 + x2 * x2;
214 } while (x >= 1.0);
215 x1 *= sqrt((-2.0) * log(x) / x);
216 x2 *= sqrt((-2.0) * log(x) / x);
217
218 fprintf(out, "%f\n", m + d * x1);
219 fprintf(out, "%f\n", m + d * x2);
220
221 n--;
222 }
223
224 fclose(out);
225
226 exit(0);
227 }

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