Mercurial > hg > wm
annotate Meerwald-dir/gen_dugad_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_dugad_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] [-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 n = 1000; | |
| 33 int s = 0; | |
| 34 int e = 2; | |
| 35 int f = 1; | |
| 36 int l = 3; | |
| 37 char F[MAXPATHLEN] = "filter.dat"; | |
| 38 double a = 0.2; | |
| 39 double t1 = 40.0; | |
| 40 double t2 = 50.0; | |
| 41 double m = 0.0; | |
| 42 double d = 1.0; | |
| 43 | |
| 44 progname = argv[0]; | |
| 45 | |
| 46 while ((c = getopt(argc, argv, "a:b:d:e:f:F:h?l:m:n:o:s:S:t:T:")) != EOF) { | |
| 47 switch (c) { | |
| 48 case 'a': | |
| 49 a = atof(optarg); | |
| 50 if (a <= 0.0) { | |
| 51 fprintf(stderr, "%s: alpha factor %f out of range\n", progname, a); | |
| 52 exit(1); | |
| 53 } | |
| 54 break; | |
| 55 case 'd': | |
| 56 d = atof(optarg); | |
| 57 if (d <= 0.0) { | |
| 58 fprintf(stderr, "%s: deviation %f out of range\n", progname, d); | |
| 59 exit(1); | |
| 60 } | |
| 61 break; | |
| 62 | |
| 63 case 'e': | |
| 64 e = atoi(optarg); | |
| 65 if (e < 0) { | |
| 66 fprintf(stderr, "%s: wavelet filtering method %d out of range\n", progname, e); | |
| 67 } | |
| 68 break; | |
| 69 case 'f': | |
| 70 f = atoi(optarg); | |
| 71 if (f <= 0) { | |
| 72 fprintf(stderr, "%s: filter number %d out of range\n", progname, f); | |
| 73 exit(1); | |
| 74 } | |
| 75 break; | |
| 76 case 'F': | |
| 77 strcpy(F, optarg); | |
| 78 break; | |
| 79 case 'h': | |
| 80 case '?': | |
| 81 usage(); | |
| 82 break; | |
| 83 case 'l': | |
| 84 l = atoi(optarg); | |
| 85 if (l <= 0) { | |
| 8 | 86 fprintf(stderr, "%s: decomposition level %d out of range\n", progname, l); |
| 0 | 87 exit(1); |
| 88 } | |
| 89 break; | |
| 90 case 'm': | |
| 91 m = atof(optarg); | |
| 92 break; | |
| 93 case 'n': | |
| 94 n = atoi(optarg); | |
| 95 if (n < 1 || n > 32000) { | |
| 96 fprintf(stderr, "%s: watermark length %d out of range\n", progname, n); | |
| 97 exit(1); | |
| 98 } | |
| 99 break; | |
| 100 case 'o': | |
| 101 if ((out = fopen(optarg, "w")) == NULL) { | |
| 102 fprintf(stderr, "%s: unable to open output file %s\n", progname, optarg); | |
| 103 exit(1); | |
| 104 } | |
| 105 strcpy(output_name, optarg); | |
| 106 break; | |
| 107 case 's': | |
| 108 if ((sig = fopen(optarg, "r")) == NULL) { | |
| 109 fprintf(stderr, "%s: unable to open signature file %s\n", progname, optarg); | |
| 110 exit(1); | |
| 111 } | |
| 112 strcpy(signature_name, optarg); | |
| 113 break; | |
| 114 case 'S': | |
| 115 s = atoi(optarg); | |
| 116 break; | |
| 117 case 't': | |
| 118 t1 = atof(optarg); | |
| 119 if (t1 <= 0.0) { | |
| 120 fprintf(stderr, "%s: casting threshold %f out of range\n", progname, t1); | |
| 121 exit(1); | |
| 122 } | |
| 123 break; | |
| 124 case 'T': | |
| 125 t2 = atof(optarg); | |
| 126 if (t2 <= 0.0) { | |
| 127 fprintf(stderr, "%s: detection threshold %f out of range\n", progname, t2); | |
| 128 exit(1); | |
| 129 } | |
| 130 break; | |
| 131 } | |
| 132 } | |
| 133 | |
| 134 argc -= optind; | |
| 135 argv += optind; | |
| 136 | |
| 137 if (argc > 0) { | |
| 138 usage(); | |
| 139 exit(1); | |
| 140 } | |
| 141 | |
| 142 if (sig) { | |
| 143 char line[32]; | |
| 144 fgets(line, sizeof(line), sig); | |
| 145 if (strspn(line, "DGSG") >= 4) { | |
| 146 if (n == 0) | |
| 147 fscanf(sig, "%d\n", &n); | |
| 148 else | |
| 149 fscanf(sig, "%*d\n"); | |
| 150 if (l == 0) | |
| 151 fscanf(sig, "%d\n", &l); | |
| 152 else | |
| 153 fscanf(sig, "%*d\n"); | |
| 154 if (a == 0.0) | |
| 155 fscanf(sig, "%lf\n", &a); | |
| 156 else | |
|
16
4987db85cfae
fix another scanf() warning
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
15
diff
changeset
|
157 fscanf(sig, "%*f\n"); |
| 0 | 158 if (t1 == 0.0) |
| 159 fscanf(sig, "%lf\n", &t1); | |
| 160 else | |
|
16
4987db85cfae
fix another scanf() warning
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
15
diff
changeset
|
161 fscanf(sig, "%*f\n"); |
| 0 | 162 if (t2 == 0.0) |
| 163 fscanf(sig, "%lf\n", &t2); | |
| 164 else | |
|
16
4987db85cfae
fix another scanf() warning
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
15
diff
changeset
|
165 fscanf(sig, "%*f\n"); |
| 0 | 166 if (e < 0) |
| 167 fscanf(sig, "%d\n", &e); | |
| 168 else | |
| 169 fscanf(sig, "%*d\n"); | |
| 170 if (f == 0) | |
| 171 fscanf(sig, "%d\n", &f); | |
| 172 else | |
| 173 fscanf(sig, "%*d\n"); | |
| 174 if (!strcmp(F, "")) | |
| 15 | 175 fscanf(sig, "%[^\n\r]\n", F); |
| 0 | 176 else |
| 177 fscanf(sig, "%*[^\n\r]\n"); | |
| 178 } | |
| 179 else { | |
| 180 fprintf(stderr, "%s: invalid signature file %s\n", progname, signature_name); | |
| 181 exit(1); | |
| 182 } | |
| 183 } | |
| 184 | |
| 185 if (s) | |
| 186 srandom(s); | |
| 187 else | |
| 188 srandom(time(NULL) * getpid()); | |
| 189 | |
| 190 fprintf(out, "DGSG\n"); | |
| 191 fprintf(out, "%d\n", n); | |
| 192 fprintf(out, "%d\n", l); | |
| 193 fprintf(out, "%f\n", a); | |
| 194 fprintf(out, "%f\n", t1); | |
| 195 fprintf(out, "%f\n", t2); | |
| 196 fprintf(out, "%d\n", e); | |
| 197 fprintf(out, "%d\n", f); | |
| 198 fprintf(out, "%s\n", F); | |
| 199 | |
| 200 n >>= 1; | |
| 201 while (n > 0) { | |
| 202 double x; | |
| 203 double x1, x2; | |
| 204 | |
| 205 /* | |
| 206 * Algorithm P (Polar method for normal deviates), | |
| 207 * Knuth, D., "The Art of Computer Programming", Vol. 2, 3rd Edition, p. 122 | |
| 208 */ | |
| 209 do { | |
| 210 x1 = 2.0 * ((random() & RAND_MAX) / ((double) RAND_MAX + 1.0)) - 1.0; | |
| 211 x2 = 2.0 * ((random() & RAND_MAX) / ((double) RAND_MAX + 1.0)) - 1.0; | |
| 212 x = x1 * x1 + x2 * x2; | |
| 213 } while (x >= 1.0); | |
| 214 x1 *= sqrt((-2.0) * log(x) / x); | |
| 215 x2 *= sqrt((-2.0) * log(x) / x); | |
| 216 | |
| 217 fprintf(out, "%f\n", m + d * x1); | |
| 218 fprintf(out, "%f\n", m + d * x2); | |
| 219 | |
| 220 n--; | |
| 221 } | |
| 222 | |
| 223 fclose(out); | |
| 224 | |
| 225 exit(0); | |
| 226 } |