Mercurial > hg > wm
annotate Meerwald-dir/wm_kund2_d.c @ 25:5a57a145bccb default tip
Added tag v0.7 for changeset 9f20bce6184e
| author | Peter Meerwald-Stadler <pmeerw@pmeerw.net> |
|---|---|
| date | Fri, 20 Dec 2024 13:32:15 +0100 |
| parents | 9f20bce6184e |
| children |
| rev | line source |
|---|---|
| 3 | 1 #include "wm.h" |
| 2 #include "signature.h" | |
| 3 #include "dwt.h" | |
|
24
9f20bce6184e
move directories, support netpbm 11
Peter Meerwald-Stadler <pmeerw@pmeerw.net>
parents:
20
diff
changeset
|
4 #include "netpbm/pgm.h" |
| 3 | 5 |
| 6 char *progname; | |
| 7 | |
| 8 void usage(void) { | |
| 9 fprintf(stderr, "usage: %s [-e n] [-f n] [-F n] [-h] [-l n] [-o file] [-q n] [-s file] [-v n] file\n\n", progname); | |
| 10 fprintf(stderr, "\t-a n\t\toverall embedding strength\n"); | |
| 11 fprintf(stderr, "\t-e n\t\twavelet filtering method\n"); | |
| 12 fprintf(stderr, "\t-f n\t\tfilter number\n"); | |
| 13 fprintf(stderr, "\t-F file\t\tfilter definition file\n"); | |
| 14 fprintf(stderr, "\t-h\t\tprint usage\n"); | |
| 15 fprintf(stderr, "\t-l n\t\tembedding level\n"); | |
| 16 fprintf(stderr, "\t-o file\t\textracted signature file\n"); | |
| 17 fprintf(stderr, "\t-q n\t\tsignature strength\n"); | |
| 18 fprintf(stderr, "\t-s file\t\toriginal signature file\n"); | |
| 19 fprintf(stderr, "\t-v n\t\tverbosity level\n"); | |
| 20 exit(0); | |
| 21 } | |
| 22 | |
| 23 int main(int argc, char *argv[]) { | |
| 24 | |
| 25 FILE *in = stdin; | |
| 26 FILE *out = stdout; | |
| 27 FILE *sig = NULL; | |
| 28 | |
| 29 gray **input_image; | |
| 30 | |
| 31 char signature_name[MAXPATHLEN]; | |
| 32 char output_name[MAXPATHLEN] = "(stdout)"; | |
| 33 char input_name[MAXPATHLEN] = "(stdin)"; | |
| 34 | |
| 35 int r, c; | |
| 36 int quality = 0; | |
| 37 int blocksize = 0; | |
| 38 int seed = 0; | |
| 39 int n = 0; | |
| 40 int method = -1; | |
| 41 int filter = 0; | |
| 42 char filter_name[MAXPATHLEN] = ""; | |
| 43 char *binstr; | |
| 44 | |
| 45 int level = 0; | |
| 46 double alpha = 0.0; | |
| 47 | |
| 48 int in_rows, in_cols, in_format; | |
| 49 gray in_maxval; | |
| 50 int rows, cols; | |
| 51 int row, col; | |
| 52 | |
| 53 Image_tree dwts, p; | |
| 54 | |
| 55 int verbose = 0; | |
| 56 | |
| 57 progname = argv[0]; | |
| 58 | |
| 59 pgm_init(&argc, argv); | |
| 60 wm_init(); | |
| 61 | |
| 62 while ((c = getopt(argc, argv, "a:e:f:F:h?l:o:q:s:v:")) != EOF) { | |
| 63 switch (c) { | |
| 64 case 'a': | |
| 65 alpha = atof(optarg); | |
| 66 break; | |
| 67 case 'e': | |
| 68 method = atoi(optarg); | |
| 69 if (method < 0) { | |
| 70 fprintf(stderr, "%s: wavelet filtering method %d out of range\n", progname, method); | |
| 71 exit(1); | |
| 72 } | |
| 73 break; | |
| 74 case 'f': | |
| 75 filter = atoi(optarg); | |
| 76 if (filter <= 0) { | |
| 77 fprintf(stderr, "%s: filter number %d out of range\n", progname, filter); | |
| 78 exit(1); | |
| 79 } | |
| 80 break; | |
| 81 case 'F': | |
| 82 strcpy(filter_name, optarg); | |
| 83 break; | |
| 84 case 'h': | |
| 85 case '?': | |
| 86 usage(); | |
| 87 break; | |
| 88 case 'l': | |
| 89 level = atoi(optarg); | |
| 90 if (level < 1) { | |
| 91 fprintf(stderr, "%s: embedding level out of range\n", progname); | |
| 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 'q': | |
| 103 quality = atoi(optarg); | |
| 104 if (quality < 1) { | |
| 105 fprintf(stderr, "%s: quality level %d out of range\n", progname, quality); | |
| 106 exit(1); | |
| 107 } | |
| 108 break; | |
| 109 case 's': | |
| 110 if ((sig = fopen(optarg, "r")) == NULL) { | |
| 111 fprintf(stderr, "%s: unable to open signature file %s\n", progname, optarg); | |
| 112 exit(1); | |
| 113 } | |
| 114 strcpy(signature_name, optarg); | |
| 115 break; | |
| 116 case 'v': | |
| 117 verbose = atoi(optarg); | |
| 118 if (verbose < 0) { | |
| 119 fprintf(stderr, "%s: verbosity level %d out of range\n", progname, verbose); | |
| 120 exit(1); | |
| 121 } | |
| 122 break; | |
| 123 } | |
| 124 } | |
| 125 | |
| 126 argc -= optind; | |
| 127 argv += optind; | |
| 128 | |
| 129 if (argc > 1) { | |
| 130 usage(); | |
| 131 exit(1); | |
| 132 } | |
| 133 | |
| 8 | 134 if (argc == 1 && *argv[0] != '-') { |
| 3 | 135 if ((in = fopen(argv[0], "rb")) == NULL) { |
| 136 fprintf(stderr, "%s: unable to open input file %s\n", progname, argv[0]); | |
| 137 exit(1); | |
| 138 } | |
| 139 else | |
| 140 strcpy(input_name, argv[0]); | |
| 8 | 141 } |
| 142 | |
| 3 | 143 if (sig) { |
| 144 char line[1024]; | |
| 145 fgets(line, sizeof(line), sig); | |
| 146 if (strspn(line, "KD2SG") >= 5) { | |
| 147 fscanf(sig, "%d\n", &nbit_signature); | |
| 148 if (quality == 0) | |
| 149 fscanf(sig, "%d\n", &quality); | |
| 150 else | |
| 151 fscanf(sig, "%*d\n"); | |
| 152 if (blocksize == 0) | |
| 153 fscanf(sig, "%d\n", &blocksize); | |
| 154 else | |
| 155 fscanf(sig, "%*d\n"); | |
| 156 if (method < 0) | |
| 157 fscanf(sig, "%d\n", &method); | |
| 158 else | |
| 159 fscanf(sig, "%*d\n"); | |
| 160 if (filter == 0) | |
| 161 fscanf(sig, "%d\n", &filter); | |
| 162 else | |
| 163 fscanf(sig, "%*d\n"); | |
| 164 if (!strcmp(filter_name, "")) | |
| 15 | 165 fscanf(sig, "%[^\n\r]\n", filter_name); |
| 3 | 166 else |
| 167 fscanf(sig, "%*[^\n\r]\n"); | |
| 168 if (level == 0) | |
| 169 fscanf(sig, "%d\n", &level); | |
| 170 else | |
| 171 fscanf(sig, "%*d\n"); | |
| 172 fscanf(sig, "%d\n", &seed); | |
| 173 srandom(seed); | |
| 174 nbit_signature2 = nbit_signature; | |
| 175 n_signature = n_signature2 = NBITSTOBYTES(nbit_signature2); | |
| 176 binstr = malloc((nbit_signature2 + 1) * sizeof(char)); | |
| 177 fscanf(sig, "%[01]\n", binstr); | |
| 178 binstr_to_sig2(binstr); | |
| 179 free(binstr); | |
| 180 init_signature_bits(); | |
| 181 } | |
| 182 else { | |
| 183 fprintf(stderr, "%s: invalid signature file %s\n", progname, signature_name); | |
| 184 exit(1); | |
| 185 } | |
| 186 fclose(sig); | |
| 187 } | |
| 188 else { | |
| 189 fprintf(stderr, "%s: signature file not specified, use -s file option\n", progname); | |
| 190 exit(1); | |
| 191 } | |
| 192 | |
| 193 pgm_readpgminit(in, &in_cols, &in_rows, &in_maxval, &in_format); | |
| 194 | |
| 195 cols = in_cols; | |
| 196 rows = in_rows; | |
| 197 | |
| 198 if (verbose > 0) | |
| 199 fprintf(stderr, "%s: extracting %d bits with quality %d from\n" | |
| 200 " %d x %d host image, decomposition level %d\n", | |
| 201 progname, nbit_signature, quality, cols, rows, level); | |
| 202 | |
| 203 input_image = pgm_allocarray(in_cols, in_rows); | |
| 204 | |
| 205 for (row = 0; row < in_rows; row++) | |
| 206 pgm_readpgmrow(in, input_image[row], in_cols, in_maxval, in_format); | |
| 207 | |
| 208 fclose(in); | |
| 209 | |
| 210 init_dwt(cols, rows, filter_name, filter, level, method); | |
| 211 #ifdef POLLEN_STUFF | |
| 212 #include "pollen_stuff.c" | |
| 213 #endif | |
| 214 #ifdef PARAM_STUFF | |
| 215 #include "param_stuff.c" | |
| 216 #endif | |
| 217 | |
| 218 fprintf(out, "KD2WM\n"); | |
| 219 fprintf(out, "%d\n", nbit_signature); | |
| 220 | |
| 221 dwts = fdwt(input_image); | |
| 222 | |
| 223 | |
| 224 p = dwts; | |
| 225 | |
| 226 // consider each resolution level | |
| 227 while (p->coarse->level < level) { | |
| 228 int lwidth = p->vertical->image->width; | |
| 229 int lheight = p->vertical->image->height; | |
| 230 int bx, by; | |
| 231 | |
| 232 for (bx = 0; bx < lwidth; bx += blocksize) { | |
| 233 for (by = 0; by < lheight; by += blocksize) { | |
| 234 int bw = MIN(bx + blocksize, lwidth); | |
| 235 int bh = MIN(by + blocksize, lheight); | |
| 236 int STEP; | |
| 237 | |
| 238 // start to extracting watermark from beginning at each level | |
| 239 // get width and height of detail images at current level | |
|
20
bd669312f068
suppress warnings, fix link errors
Peter Meerwald-Stadler <pmeerw@pmeerw.net>
parents:
15
diff
changeset
|
240 |
| 3 | 241 if (verbose > 1) |
| 242 fprintf(stderr, "%s: extracting at level %d now, size %d x %d\n", | |
| 243 progname, p->coarse->level, lwidth, lheight); | |
| 244 | |
| 245 STEP = ROUND(alpha * (-15.555) + 10.777); | |
| 246 n = 0; | |
| 247 // consider each coefficient at resolution level | |
| 248 for (row = by; row < bh - STEP; row += STEP) | |
| 249 for (col = bx; col < bw - STEP; col += STEP) { | |
| 250 double h, v, d; | |
| 251 double *f1 = &h, *f2 = &v, *f3 = &d; | |
| 252 double delta; | |
| 253 | |
| 254 // key-dependant coefficient selection | |
| 255 r = row + 1 + random() % (STEP-2); | |
| 256 c = col + 1 + random() % (STEP-2); | |
| 257 | |
| 258 // get coefficient values, one from each detail image | |
| 259 h = get_pixel(p->horizontal->image, c, r); | |
| 260 v = get_pixel(p->vertical->image, c, r); | |
| 261 d = get_pixel(p->diagonal->image, c, r); | |
| 262 | |
| 263 // order pointer to coefficient values such that f1 <= f2 <= f3 | |
| 264 #define SWAP(A, B) {double *t = A; A = B; B = t;} | |
| 265 if (*f1 > *f2) SWAP(f1, f2); | |
| 266 if (*f2 > *f3) SWAP(f2, f3); | |
| 267 if (*f1 > *f2) SWAP(f1, f2); | |
| 268 | |
| 269 // calculate delta, the width of the bins | |
| 270 delta = (*f3 - *f1) / (double) (2 * quality - 1); | |
| 271 | |
| 272 // set middle coefficient to closest appropriate bin, | |
| 273 // according to watermark bit | |
| 274 if (quality == 1) | |
| 275 set_signature_bit(n, (*f3 - *f2) < (*f2 - *f1)); | |
| 276 else { | |
| 277 double l = *f1; | |
| 278 int i = 0; | |
| 279 while ((l + delta) < *f2) { | |
| 280 l += delta; | |
| 281 i++; | |
| 282 } | |
| 283 if (i % 2) | |
| 284 set_signature_bit(n, (l + delta - *f2) > (*f2 - l)); | |
| 285 else | |
| 286 set_signature_bit(n, (l + delta - *f2) < (*f2 - l)); | |
| 287 } | |
| 288 | |
| 289 if (verbose > 2) | |
| 290 fprintf(stderr, "%s: extracted bit #%d (= %d =? %d) at (%d/%d),\n" | |
| 291 " f1=%lf, f2=%lf, f3=%lf\n", progname, n, | |
| 292 get_signature_bit(n), get_signature2_bit(n), | |
| 293 c, r, *f1, *f2, *f3); | |
| 294 n++; | |
| 295 } | |
| 296 | |
| 297 nbit_signature = n; | |
| 298 binstr = malloc(sizeof(char) * (nbit_signature + 1)); | |
| 299 sig_to_binstr(binstr); | |
| 300 fprintf(out, "%d\n", nbit_signature); | |
| 301 fprintf(out, "%s\n", binstr); | |
| 302 free(binstr); | |
| 303 | |
| 304 } | |
| 305 } | |
| 306 // descend one level | |
| 307 p = p->coarse; | |
| 308 } | |
| 309 | |
| 310 fclose(out); | |
| 311 | |
| 312 pgm_freearray(input_image, rows); | |
| 313 | |
| 314 exit(0); | |
| 315 } |