Mercurial > hg > wm
annotate Meerwald-dir/gen_kim_sig.c @ 24:9f20bce6184e v0.7
move directories, support netpbm 11
| author | Peter Meerwald-Stadler <pmeerw@pmeerw.net> |
|---|---|
| date | Fri, 20 Dec 2024 13:08:59 +0100 |
| parents | Meerwald/gen_kim_sig.c@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] [-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 n = 1000; | |
| 32 int s = 0; | |
| 33 int e = 2; | |
| 34 int f = 1; | |
| 35 char F[MAXPATHLEN] = "filter.dat"; | |
| 36 double a = 0.1; | |
| 37 double A = 0.02; | |
| 38 int l = 4; | |
| 39 double m = 0.0; | |
| 40 double d = 1.0; | |
| 41 | |
| 42 progname = argv[0]; | |
| 43 | |
| 44 while ((c = getopt(argc, argv, "a:A:l:d:e:f:F:h?m:n:o:s:S:")) != EOF) { | |
| 45 switch (c) { | |
| 46 case 'a': | |
| 47 a = atof(optarg); | |
| 48 if (a <= 0.0) { | |
| 49 fprintf(stderr, "%s: alpha factor %f out of range\n", progname, a); | |
| 50 exit(1); | |
| 51 } | |
| 52 break; | |
| 53 case 'A': | |
| 54 A = atof(optarg); | |
| 55 if (A <= 0.0) { | |
| 56 fprintf(stderr, "%s: alpha factor %f out of range\n", progname, a); | |
| 57 exit(1); | |
| 58 } | |
| 59 break; | |
| 60 case 'l': | |
| 61 l = atoi(optarg); | |
| 62 if (l <= 0) { | |
| 63 fprintf(stderr, "%s: decomposition level %d out of range\n", progname, l); | |
| 64 exit(1); | |
| 65 } | |
| 66 break; | |
| 67 case 'd': | |
| 68 d = atof(optarg); | |
| 69 if (d <= 0.0) { | |
| 70 fprintf(stderr, "%s: deviation %f out of range\n", progname, d); | |
| 71 exit(1); | |
| 72 } | |
| 73 break; | |
| 74 case 'e': | |
| 75 e = atoi(optarg); | |
| 76 if (e < 0) { | |
| 77 fprintf(stderr, "%s: wavelet filtering method %d out of range\n", progname, e); | |
| 78 } | |
| 79 break; | |
| 80 case 'f': | |
| 81 f = atoi(optarg); | |
| 82 if (f <= 0) { | |
| 83 fprintf(stderr, "%s: filter number %d out of range\n", progname, f); | |
| 84 exit(1); | |
| 85 } | |
| 86 break; | |
| 87 case 'F': | |
| 88 strcpy(F, optarg); | |
| 89 break; | |
| 90 case 'h': | |
| 91 case '?': | |
| 92 usage(); | |
| 93 break; | |
| 94 case 'm': | |
| 95 m = atof(optarg); | |
| 96 break; | |
| 97 case 'n': | |
| 98 n = atoi(optarg); | |
| 99 if (n < 1 || n > 32000) { | |
| 100 fprintf(stderr, "%s: watermark length %d out of range\n", progname, n); | |
| 101 exit(1); | |
| 102 } | |
| 103 break; | |
| 104 case 'o': | |
| 105 if ((out = fopen(optarg, "w")) == NULL) { | |
| 106 fprintf(stderr, "%s: unable to open output file %s\n", progname, optarg); | |
| 107 exit(1); | |
| 108 } | |
| 109 strcpy(output_name, optarg); | |
| 110 break; | |
| 111 case 's': | |
| 112 if ((sig = fopen(optarg, "r")) == NULL) { | |
| 113 fprintf(stderr, "%s: unable to open signature file %s\n", progname, optarg); | |
| 114 exit(1); | |
| 115 } | |
| 116 strcpy(signature_name, optarg); | |
| 117 break; | |
| 118 case 'S': | |
| 119 s = atoi(optarg); | |
| 120 break; | |
| 121 } | |
| 122 } | |
| 123 | |
| 124 argc -= optind; | |
| 125 argv += optind; | |
| 126 | |
| 127 if (argc > 0) { | |
| 128 usage(); | |
| 129 exit(1); | |
| 130 } | |
| 131 | |
| 132 if (sig) { | |
| 133 char line[32]; | |
| 134 fgets(line, sizeof(line), sig); | |
| 135 if (strspn(line, "KISG") >= 4) { | |
| 136 if (n == 0) | |
| 137 fscanf(sig, "%d\n", &n); | |
| 138 else | |
| 139 fscanf(sig, "%*d\n"); | |
| 140 if (a == 0.0) | |
| 141 fscanf(sig, "%lf\n", &a); | |
| 142 else | |
|
16
4987db85cfae
fix another scanf() warning
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
15
diff
changeset
|
143 fscanf(sig, "%*f\n"); |
| 0 | 144 if (A == 0.0) |
| 145 fscanf(sig, "%lf\n", &A); | |
| 146 else | |
|
16
4987db85cfae
fix another scanf() warning
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
15
diff
changeset
|
147 fscanf(sig, "%*f\n"); |
| 0 | 148 if (l == 0) |
| 149 fscanf(sig, "%d\n", &l); | |
| 150 else | |
| 151 fscanf(sig, "%*d\n"); | |
| 152 if (e < 0) | |
| 153 fscanf(sig, "%d\n", &e); | |
| 154 else | |
| 155 fscanf(sig, "%*d\n"); | |
| 156 if (f == 0) | |
| 157 fscanf(sig, "%d\n", &f); | |
| 158 else | |
| 159 fscanf(sig, "%*d\n"); | |
| 160 if (!strcmp(F, "")) | |
| 15 | 161 fscanf(sig, "%[^\n\r]\n", F); |
| 0 | 162 else |
| 163 fscanf(sig, "%*[^\n\r]\n"); | |
| 164 } | |
| 165 else { | |
| 166 fprintf(stderr, "%s: invalid signature file %s\n", progname, signature_name); | |
| 167 exit(1); | |
| 168 } | |
| 169 } | |
| 170 | |
| 171 if (s) | |
| 172 srandom(s); | |
| 173 else | |
| 174 srandom(time(NULL) * getpid()); | |
| 175 | |
| 176 fprintf(out, "KISG\n"); | |
| 177 fprintf(out, "%d\n", n); | |
| 178 fprintf(out, "%f\n", a); | |
| 179 fprintf(out, "%f\n", A); | |
| 180 fprintf(out, "%d\n", l); | |
| 181 fprintf(out, "%d\n", e); | |
| 182 fprintf(out, "%d\n", f); | |
| 183 fprintf(out, "%s\n", F); | |
| 184 | |
| 185 n >>= 1; | |
| 186 while (n > 0) { | |
| 187 double x; | |
| 188 double x1, x2; | |
| 189 | |
| 190 /* | |
| 191 * Algorithm P (Polar method for normal deviates), | |
| 192 * Knuth, D., "The Art of Computer Programming", Vol. 2, 3rd Edition, p. 122 | |
| 193 */ | |
| 194 do { | |
| 195 x1 = 2.0 * ((random() & RAND_MAX) / ((double) RAND_MAX + 1.0)) - 1.0; | |
| 196 x2 = 2.0 * ((random() & RAND_MAX) / ((double) RAND_MAX + 1.0)) - 1.0; | |
| 197 x = x1 * x1 + x2 * x2; | |
| 198 } while (x >= 1.0); | |
| 199 x1 *= sqrt((-2.0) * log(x) / x); | |
| 200 x2 *= sqrt((-2.0) * log(x) / x); | |
| 201 | |
| 202 fprintf(out, "%f\n", m + d * x1); | |
| 203 fprintf(out, "%f\n", m + d * x2); | |
| 204 | |
| 205 n--; | |
| 206 } | |
| 207 | |
| 208 fclose(out); | |
| 209 | |
| 210 exit(0); | |
| 211 } |