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comparison Meerwald/gen_kim_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] [-A n] [-d n] [-e n] [-f n] [-F file] [-l n] [-m n] [-n n] [-o file] [-s file] [-S n]\n\n", progname);
7 fprintf(stderr, "\t-a n\t\talpha factor for detail subbands (default 0.1)\n");
8 fprintf(stderr, "\t-A n\t\talpha factor for approximation subband (default 0.02)\n");
9 fprintf(stderr, "\t-d n\t\tdeviation (default 1.0)\n");
10 fprintf(stderr, "\t-e n\t\twavelet filtering method (default 2)\n");
11 fprintf(stderr, "\t-f n\t\tfilter number (default 1)\n");
12 fprintf(stderr, "\t-F file\t\tfilter definition file (default 'filter.dat')\n");
13 fprintf(stderr, "\t-h\t\tprint usage\n");
14 fprintf(stderr, "\t-l n\t\tdecomposition level (default 4)\n");
15 fprintf(stderr, "\t-m n \t\tmean value (default 0.0)\n");
16 fprintf(stderr, "\t-n n\t\twatermark length (default 1000)\n");
17 fprintf(stderr, "\t-o file\t\toutput file\n");
18 fprintf(stderr, "\t-s file\t\tuse signature file's embedding information\n");
19 fprintf(stderr, "\t-S n\t\tseed\n");
20 exit(0);
21 }
22
23 int main(int argc, char *argv[]) {
24 FILE *out = stdout;
25 FILE *sig = NULL;
26
27 char output_name[MAXPATHLEN] = "(stdout)";
28 char signature_name[MAXPATHLEN];
29
30 int c;
31 int i;
32 int n = 1000;
33 int s = 0;
34 int e = 2;
35 int f = 1;
36 char F[MAXPATHLEN] = "filter.dat";
37 double a = 0.1;
38 double A = 0.02;
39 int l = 4;
40 double m = 0.0;
41 double d = 1.0;
42
43 progname = argv[0];
44
45 while ((c = getopt(argc, argv, "a:A:l:d:e:f:F:h?m:n:o:s:S:")) != EOF) {
46 switch (c) {
47 case 'a':
48 a = atof(optarg);
49 if (a <= 0.0) {
50 fprintf(stderr, "%s: alpha factor %f out of range\n", progname, a);
51 exit(1);
52 }
53 break;
54 case 'A':
55 A = atof(optarg);
56 if (A <= 0.0) {
57 fprintf(stderr, "%s: alpha factor %f out of range\n", progname, a);
58 exit(1);
59 }
60 break;
61 case 'l':
62 l = atoi(optarg);
63 if (l <= 0) {
64 fprintf(stderr, "%s: decomposition level %d out of range\n", progname, l);
65 exit(1);
66 }
67 break;
68 case 'd':
69 d = atof(optarg);
70 if (d <= 0.0) {
71 fprintf(stderr, "%s: deviation %f out of range\n", progname, d);
72 exit(1);
73 }
74 break;
75 case 'e':
76 e = atoi(optarg);
77 if (e < 0) {
78 fprintf(stderr, "%s: wavelet filtering method %d out of range\n", progname, e);
79 }
80 break;
81 case 'f':
82 f = atoi(optarg);
83 if (f <= 0) {
84 fprintf(stderr, "%s: filter number %d out of range\n", progname, f);
85 exit(1);
86 }
87 break;
88 case 'F':
89 strcpy(F, optarg);
90 break;
91 case 'h':
92 case '?':
93 usage();
94 break;
95 case 'm':
96 m = atof(optarg);
97 break;
98 case 'n':
99 n = atoi(optarg);
100 if (n < 1 || n > 32000) {
101 fprintf(stderr, "%s: watermark length %d out of range\n", progname, n);
102 exit(1);
103 }
104 break;
105 case 'o':
106 if ((out = fopen(optarg, "w")) == NULL) {
107 fprintf(stderr, "%s: unable to open output file %s\n", progname, optarg);
108 exit(1);
109 }
110 strcpy(output_name, optarg);
111 break;
112 case 's':
113 if ((sig = fopen(optarg, "r")) == NULL) {
114 fprintf(stderr, "%s: unable to open signature file %s\n", progname, optarg);
115 exit(1);
116 }
117 strcpy(signature_name, optarg);
118 break;
119 case 'S':
120 s = atoi(optarg);
121 break;
122 }
123 }
124
125 argc -= optind;
126 argv += optind;
127
128 if (argc > 0) {
129 usage();
130 exit(1);
131 }
132
133 if (sig) {
134 char line[32];
135 fgets(line, sizeof(line), sig);
136 if (strspn(line, "KISG") >= 4) {
137 if (n == 0)
138 fscanf(sig, "%d\n", &n);
139 else
140 fscanf(sig, "%*d\n");
141 if (a == 0.0)
142 fscanf(sig, "%lf\n", &a);
143 else
144 fscanf(sig, "%*lf\n");
145 if (A == 0.0)
146 fscanf(sig, "%lf\n", &A);
147 else
148 fscanf(sig, "%*lf\n");
149 if (l == 0)
150 fscanf(sig, "%d\n", &l);
151 else
152 fscanf(sig, "%*d\n");
153 if (e < 0)
154 fscanf(sig, "%d\n", &e);
155 else
156 fscanf(sig, "%*d\n");
157 if (f == 0)
158 fscanf(sig, "%d\n", &f);
159 else
160 fscanf(sig, "%*d\n");
161 if (!strcmp(F, ""))
162 fscanf(sig, "%[^\n\r]\n", &F);
163 else
164 fscanf(sig, "%*[^\n\r]\n");
165 }
166 else {
167 fprintf(stderr, "%s: invalid signature file %s\n", progname, signature_name);
168 exit(1);
169 }
170 }
171
172 if (s)
173 srandom(s);
174 else
175 srandom(time(NULL) * getpid());
176
177 fprintf(out, "KISG\n");
178 fprintf(out, "%d\n", n);
179 fprintf(out, "%f\n", a);
180 fprintf(out, "%f\n", A);
181 fprintf(out, "%d\n", l);
182 fprintf(out, "%d\n", e);
183 fprintf(out, "%d\n", f);
184 fprintf(out, "%s\n", F);
185
186 n >>= 1;
187 while (n > 0) {
188 double x;
189 double x1, x2;
190
191 /*
192 * Algorithm P (Polar method for normal deviates),
193 * Knuth, D., "The Art of Computer Programming", Vol. 2, 3rd Edition, p. 122
194 */
195 do {
196 x1 = 2.0 * ((random() & RAND_MAX) / ((double) RAND_MAX + 1.0)) - 1.0;
197 x2 = 2.0 * ((random() & RAND_MAX) / ((double) RAND_MAX + 1.0)) - 1.0;
198 x = x1 * x1 + x2 * x2;
199 } while (x >= 1.0);
200 x1 *= sqrt((-2.0) * log(x) / x);
201 x2 *= sqrt((-2.0) * log(x) / x);
202
203 fprintf(out, "%f\n", m + d * x1);
204 fprintf(out, "%f\n", m + d * x2);
205
206 n--;
207 }
208
209 fclose(out);
210
211 exit(0);
212 }

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