Mercurial > hg > wm
annotate Meerwald/gen_zhu_sig.c @ 18:3bdb67e76858
mse opt.
| author | Peter Meerwald <pmeerw@cosy.sbg.ac.at> |
|---|---|
| date | Fri, 30 Jan 2009 12:46:49 +0100 |
| parents | 4987db85cfae |
| children |
| rev | line source |
|---|---|
| 0 | 1 #include "wm.h" |
| 2 | |
| 3 char *progname; | |
| 4 | |
| 5 void usage(void) { | |
| 6 fprintf(stderr, "usage: %s [-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 (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 level (default 7)\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\tuse signature file's embedding information\n"); | |
| 18 fprintf(stderr, "\t-S n\t\tseed\n"); | |
| 19 exit(0); | |
| 20 } | |
| 21 | |
| 22 int main(int argc, char *argv[]) { | |
| 23 FILE *out = stdout; | |
| 24 FILE *sig = NULL; | |
| 25 | |
| 26 char output_name[MAXPATHLEN] = "(stdout)"; | |
| 27 char signature_name[MAXPATHLEN]; | |
| 28 | |
| 29 int c; | |
| 30 int n = 1000; | |
| 31 int s = 0; | |
| 32 int e = 2; | |
| 33 int f = 1; | |
| 34 char F[MAXPATHLEN] = "filter.dat"; | |
| 35 double a = 0.2; | |
| 36 double m = 0.0; | |
| 37 double d = 1.0; | |
| 38 int l = 7; | |
| 39 | |
| 40 progname = argv[0]; | |
| 41 | |
| 42 while ((c = getopt(argc, argv, "a:d:e:f:F:h?l:m:n:o:s:S:")) != EOF) { | |
| 43 switch (c) { | |
| 44 case 'a': | |
| 45 a = atof(optarg); | |
| 46 if (a <= 0.0) { | |
| 47 fprintf(stderr, "%s: alpha factor %f out of range\n", progname, a); | |
| 48 exit(1); | |
| 49 } | |
| 50 break; | |
| 51 case 'l': | |
| 52 l = atoi(optarg); | |
| 53 if (l <= 0) { | |
| 54 fprintf(stderr, "%s: decomposition level %d out of range\n", progname, l); | |
| 55 exit(1); | |
| 56 } | |
| 57 break; | |
| 58 case 'd': | |
| 59 d = atof(optarg); | |
| 60 if (d <= 0.0) { | |
| 61 fprintf(stderr, "%s: deviation %f out of range\n", progname, d); | |
| 62 exit(1); | |
| 63 } | |
| 64 break; | |
| 65 case 'e': | |
| 66 e = atoi(optarg); | |
| 67 if (e < 0) { | |
| 68 fprintf(stderr, "%s: wavelet filtering method %d out of range\n", progname, e); | |
| 69 } | |
| 70 break; | |
| 71 case 'f': | |
| 72 f = atoi(optarg); | |
| 73 if (f <= 0) { | |
| 74 fprintf(stderr, "%s: filter number %d out of range\n", progname, f); | |
| 75 exit(1); | |
| 76 } | |
| 77 break; | |
| 78 case 'F': | |
| 79 strcpy(F, optarg); | |
| 80 break; | |
| 81 case 'h': | |
| 82 case '?': | |
| 83 usage(); | |
| 84 break; | |
| 85 case 'm': | |
| 86 m = atof(optarg); | |
| 87 break; | |
| 88 case 'n': | |
| 89 n = atoi(optarg); | |
| 90 if (n < 1 || n > 32000) { | |
| 91 fprintf(stderr, "%s: watermark length %d out of range\n", progname, n); | |
| 92 exit(1); | |
| 93 } | |
| 94 break; | |
| 95 case 'o': | |
| 96 if ((out = fopen(optarg, "w")) == NULL) { | |
| 97 fprintf(stderr, "%s: unable to open output file %s\n", progname, optarg); | |
| 98 exit(1); | |
| 99 } | |
| 100 strcpy(output_name, optarg); | |
| 101 break; | |
| 102 case 's': | |
| 103 if ((sig = fopen(optarg, "r")) == NULL) { | |
| 104 fprintf(stderr, "%s: unable to open signature file %s\n", progname, optarg); | |
| 105 exit(1); | |
| 106 } | |
| 107 strcpy(signature_name, optarg); | |
| 108 break; | |
| 109 case 'S': | |
| 110 s = atoi(optarg); | |
| 111 break; | |
| 112 } | |
| 113 } | |
| 114 | |
| 115 argc -= optind; | |
| 116 argv += optind; | |
| 117 | |
| 118 if (argc > 0) { | |
| 119 usage(); | |
| 120 exit(1); | |
| 121 } | |
| 122 | |
| 123 if (sig) { | |
| 124 char line[32]; | |
| 125 fgets(line, sizeof(line), sig); | |
| 126 if (strspn(line, "ZHSG") >= 4) { | |
| 127 if (n == 0) | |
| 128 fscanf(sig, "%d\n", &n); | |
| 129 else | |
| 130 fscanf(sig, "%*d\n"); | |
| 131 if (a == 0.0) | |
| 132 fscanf(sig, "%lf\n", &a); | |
| 133 else | |
|
16
4987db85cfae
fix another scanf() warning
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
15
diff
changeset
|
134 fscanf(sig, "%*f\n"); |
| 0 | 135 if (l == 0) |
| 136 fscanf(sig, "%d\n", &l); | |
| 137 else | |
| 138 fscanf(sig, "%*d\n"); | |
| 139 if (e < 0) | |
| 140 fscanf(sig, "%d\n", &e); | |
| 141 else | |
| 142 fscanf(sig, "%*d\n"); | |
| 143 if (f == 0) | |
| 144 fscanf(sig, "%d\n", &f); | |
| 145 else | |
| 146 fscanf(sig, "%*d\n"); | |
| 147 if (!strcmp(F, "")) | |
| 15 | 148 fscanf(sig, "%[^\n\r]\n", F); |
| 0 | 149 else |
| 150 fscanf(sig, "%*[^\n\r]\n"); | |
| 151 } | |
| 152 else { | |
| 153 fprintf(stderr, "%s: invalid signature file %s\n", progname, signature_name); | |
| 154 exit(1); | |
| 155 } | |
| 156 } | |
| 157 | |
| 158 if (s) | |
| 159 srandom(s); | |
| 160 else | |
| 161 srandom(time(NULL) * getpid()); | |
| 162 | |
| 163 fprintf(out, "ZHSG\n"); | |
| 164 fprintf(out, "%d\n", n); | |
| 165 fprintf(out, "%f\n", a); | |
| 166 fprintf(out, "%d\n", l); | |
| 167 fprintf(out, "%d\n", e); | |
| 168 fprintf(out, "%d\n", f); | |
| 169 fprintf(out, "%s\n", F); | |
| 170 | |
| 171 n >>= 1; | |
| 172 while (n > 0) { | |
| 173 double x; | |
| 174 double x1, x2; | |
| 175 | |
| 176 /* | |
| 177 * Algorithm P (Polar method for normal deviates), | |
| 178 * Knuth, D., "The Art of Computer Programming", Vol. 2, 3rd Edition, p. 122 | |
| 179 */ | |
| 180 do { | |
| 181 x1 = 2.0 * ((random() & RAND_MAX) / ((double) RAND_MAX + 1.0)) - 1.0; | |
| 182 x2 = 2.0 * ((random() & RAND_MAX) / ((double) RAND_MAX + 1.0)) - 1.0; | |
| 183 x = x1 * x1 + x2 * x2; | |
| 184 } while (x >= 1.0); | |
| 185 x1 *= sqrt((-2.0) * log(x) / x); | |
| 186 x2 *= sqrt((-2.0) * log(x) / x); | |
| 187 | |
| 188 fprintf(out, "%f\n", m + d * x1); | |
| 189 fprintf(out, "%f\n", m + d * x2); | |
| 190 | |
| 191 n--; | |
| 192 } | |
| 193 | |
| 194 fclose(out); | |
| 195 | |
| 196 exit(0); | |
| 197 } |