Mercurial > hg > wm
annotate Meerwald-dir/wm_kund2_e.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/wm_kund2_e.c@ad1d224896c5 |
| 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:
15
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] [-v n] -s file 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-l n\t\tembedding level\n"); | |
| 15 fprintf(stderr, "\t-h\t\tprint usage\n"); | |
| 16 fprintf(stderr, "\t-o file\t\toutput (watermarked) file\n"); | |
| 17 fprintf(stderr, "\t-q n\t\tsignature strength (default 4)\n"); | |
| 18 fprintf(stderr, "\t-s file\t\tsignature to embed in input image\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 char output_name[MAXPATHLEN] = "(stdout)"; | |
| 30 char input_name[MAXPATHLEN] = "(stdin)"; | |
| 31 char signature_name[MAXPATHLEN]; | |
| 32 | |
| 33 char *binstr; | |
| 34 | |
| 35 int r, c, n; | |
| 36 int row, col; | |
| 37 | |
| 38 int quality = 0; | |
| 39 int blocksize = 0; | |
| 40 int filter = 0; | |
| 41 int method = -1; | |
| 42 int level = 0; | |
| 43 char filter_name[MAXPATHLEN] = ""; | |
| 44 | |
| 45 double alpha = 0.0; | |
| 46 int seed; | |
| 47 int verbose = 0; | |
| 48 | |
| 49 gray **image; | |
| 50 Image_tree dwts, p; | |
| 51 | |
| 52 gray maxval; | |
| 15 | 53 int rows, cols, format; |
| 3 | 54 |
| 55 progname = argv[0]; | |
| 56 | |
| 57 pgm_init(&argc, argv); | |
| 58 wm_init(); | |
| 59 | |
| 60 while ((c = getopt(argc, argv, "a:e:f:F:h?l:o:q:s:v:")) != EOF) { | |
| 61 switch (c) { | |
| 62 case 'a': | |
| 63 alpha = atof(optarg); | |
| 64 break; | |
| 65 case 'e': | |
| 66 method = atoi(optarg); | |
| 67 if (method < 0) { | |
| 68 fprintf(stderr, "%s: wavelet filtering method %d out of range\n", progname, method); | |
| 69 exit(1); | |
| 70 } | |
| 71 break; | |
| 72 case 'f': | |
| 73 filter = atoi(optarg); | |
| 74 if (filter <= 0) { | |
| 75 fprintf(stderr, "%s: filter number %d out of range\n", progname, filter); | |
| 76 exit(1); | |
| 77 } | |
| 78 break; | |
| 79 case 'F': | |
| 80 strcpy(filter_name, optarg); | |
| 81 break; | |
| 82 case 'h': | |
| 83 case '?': | |
| 84 usage(); | |
| 85 break; | |
| 86 case 'l': | |
| 87 level = atoi(optarg); | |
| 88 if (level < 1) { | |
| 89 fprintf(stderr, "%s: embedding level out of range\n", progname); | |
| 90 exit(1); | |
| 91 } | |
| 92 break; | |
| 93 case 'o': | |
| 94 if ((out = fopen(optarg, "wb")) == NULL) { | |
| 95 fprintf(stderr, "%s: unable to open output file %s\n", progname, optarg); | |
| 96 exit(1); | |
| 97 } | |
| 98 strcpy(output_name, optarg); | |
| 99 break; | |
| 100 case 'q': | |
| 101 quality = atoi(optarg); | |
| 102 if (quality < 1) { | |
| 103 fprintf(stderr, "%s: quality factor %d out of range\n", progname, quality); | |
| 104 exit(1); | |
| 105 } | |
| 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 'v': | |
| 115 verbose = atoi(optarg); | |
| 116 if (verbose < 0) { | |
| 117 fprintf(stderr, "%s: verbosity level %d out of range\n", progname, verbose); | |
| 118 exit(1); | |
| 119 } | |
| 120 break; | |
| 121 } | |
| 122 } | |
| 123 | |
| 124 argc -= optind; | |
| 125 argv += optind; | |
| 126 | |
| 127 if (argc > 1) { | |
| 128 usage(); | |
| 129 exit(1); | |
| 130 } | |
| 131 | |
| 8 | 132 if (argc == 1 && *argv[0] != '-') { |
| 3 | 133 if ((in = fopen(argv[0], "rb")) == NULL) { |
| 134 fprintf(stderr, "%s: unable to open input file %s\n", progname, argv[0]); | |
| 135 exit(1); | |
| 136 } | |
| 137 else | |
| 138 strcpy(input_name, argv[0]); | |
| 8 | 139 } |
| 140 | |
| 3 | 141 if (sig) { |
| 142 char line[1024]; | |
| 143 fgets(line, sizeof(line), sig); | |
| 144 if (strspn(line, "KD2SG") >= 5) { | |
| 145 fscanf(sig, "%d\n", &nbit_signature); | |
| 146 if (quality == 0) | |
| 147 fscanf(sig, "%d\n", &quality); | |
| 148 else | |
| 149 fscanf(sig, "%*d\n"); | |
| 150 if (blocksize == 0) | |
| 151 fscanf(sig, "%d\n", &blocksize); | |
| 152 else | |
| 153 fscanf(sig, "%*d\n"); | |
| 154 if (method < 0) | |
| 155 fscanf(sig, "%d\n", &method); | |
| 156 else | |
| 157 fscanf(sig, "%*d\n"); | |
| 158 if (filter == 0) | |
| 159 fscanf(sig, "%d\n", &filter); | |
| 160 else | |
| 161 fscanf(sig, "%*d\n"); | |
| 162 if (!strcmp(filter_name, "")) | |
| 15 | 163 fscanf(sig, "%[^\n\r]\n", filter_name); |
| 3 | 164 else |
| 165 fscanf(sig, "%*[^\n\r]\n"); | |
| 166 if (level == 0) | |
| 167 fscanf(sig, "%d\n", &level); | |
| 168 else | |
| 169 fscanf(sig, "%*d\n"); | |
| 170 fscanf(sig, "%d\n", &seed); | |
| 171 srandom(seed); | |
| 172 n_signature = NBITSTOBYTES(nbit_signature); | |
| 173 binstr = malloc((nbit_signature + 1) * sizeof(char)); | |
| 174 fscanf(sig, "%[01]\n", binstr); | |
| 175 binstr_to_sig(binstr); | |
| 176 free(binstr); | |
| 177 } | |
| 178 else { | |
| 179 fprintf(stderr, "%s: invalid signature file %s\n", progname, signature_name); | |
| 180 exit(1); | |
| 181 } | |
| 182 fclose(sig); | |
| 183 } | |
| 184 else { | |
| 185 fprintf(stderr, "%s: signature file not specified, use -s file option\n", progname); | |
| 186 exit(1); | |
| 187 } | |
| 188 | |
| 189 pgm_readpgminit(in, &cols, &rows, &maxval, &format); | |
| 190 | |
| 191 if (verbose > 0) | |
| 192 fprintf(stderr, "%s: embedding %d bits with quality %d in\n" | |
| 193 " %d x %d host image, up to decomposition level %d\n", | |
| 194 progname, nbit_signature, quality, cols, rows, level); | |
| 195 | |
| 196 image = pgm_allocarray(cols, rows); | |
| 197 | |
| 198 for (row = 0; row < rows; row++) | |
| 199 pgm_readpgmrow(in, image[row], cols, maxval, format); | |
| 200 | |
| 201 fclose(in); | |
| 202 | |
| 203 // decomposition of image | |
| 204 init_dwt(cols, rows, filter_name, filter, level, method); | |
| 205 #ifdef POLLEN_STUFF | |
| 206 #include "pollen_stuff.c" | |
| 207 #endif | |
| 208 #ifdef PARAM_STUFF | |
| 209 #include "param_stuff.c" | |
| 210 #endif | |
| 211 | |
| 212 dwts = fdwt(image); | |
| 213 | |
| 214 p = dwts; | |
| 215 | |
| 216 // consider each resolution level | |
| 217 while (p->coarse->level < level) { | |
| 218 int lwidth = p->vertical->image->width; | |
| 219 int lheight = p->vertical->image->height; | |
| 220 int l = p->vertical->level; | |
| 221 int bx, by; | |
| 222 int nblock; | |
| 223 int bits_per_level; | |
| 224 | |
| 225 nblock = 0; | |
| 226 bits_per_level = 0; | |
| 227 for (bx = 0; bx < lwidth; bx += blocksize) { | |
| 228 for (by = 0; by < lheight; by += blocksize) { | |
| 229 int bw = MIN(bx + blocksize, lwidth); | |
| 230 int bh = MIN(by + blocksize, lheight); | |
| 231 int STEP; | |
| 232 float MIN_DIFF; | |
| 233 | |
| 234 // start to embed signature from beginning at each level | |
| 235 // get width and height of detail images at current level | |
| 236 | |
| 237 | |
| 238 if (verbose > 1) | |
| 239 fprintf(stderr, "%s: embedding at level %d now, block %d, size %d x %d at %d, %d\n", | |
| 240 progname, l, nblock, bw, bh, bx, by); | |
| 241 | |
| 242 MIN_DIFF = ROUND(120.0 * alpha); | |
| 243 STEP = ROUND(alpha * (-15.555) + 10.777); | |
| 244 // fprintf(stderr, "XXX %d %f\n", STEP, MIN_DIFF); | |
| 245 | |
| 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 if (verbose > 2) | |
| 270 fprintf(stderr, "%s: embedding bit #%d (= %d) at (%d/%d),\n", | |
| 271 progname, n, get_signature_bit(n % nbit_signature), c, r); | |
| 272 if (verbose > 5) | |
| 273 fprintf(stderr, " h=%lf, v=%lf, d=%lf\n", h, v, d); | |
| 274 if (verbose > 2) | |
| 275 fprintf(stderr, " f1=%lf, f2=%lf", *f1, *f2); | |
| 276 | |
| 277 if ((*f3 - *f1) < MIN_DIFF) { | |
| 278 double adj = (MIN_DIFF - (*f3 - *f1)) / 2.0; | |
| 279 *f1 -= adj; | |
| 280 *f3 += adj; | |
| 281 } | |
| 282 | |
| 283 // calculate delta, the width of the bins | |
| 284 delta = (*f3 - *f1) / (double) (2 * quality - 1); | |
| 285 | |
| 286 // set middle coefficient to closest appropriate bin, | |
| 287 // according to watermark bit | |
| 288 bits_per_level++; | |
| 289 if (quality == 1) | |
| 290 *f2 = get_signature_bit(n % nbit_signature) ? *f3 : *f1; | |
| 291 else { | |
| 292 double l = get_signature_bit(n % nbit_signature) ? *f1 + delta : *f1; | |
| 293 while ((l + 2 * delta) < *f2) l += 2 * delta; | |
| 294 *f2 = (*f2 - l) < (l + 2 * delta - *f2) ? l : l + 2 * delta; | |
| 295 } | |
| 296 | |
| 297 if (verbose > 2) | |
| 298 fprintf(stderr, " -> %lf, f3=%lf\n", *f2, *f3); | |
| 299 | |
| 300 // write pixels, one of them modified | |
| 301 set_pixel(p->horizontal->image, c, r, h); | |
| 302 set_pixel(p->vertical->image, c, r, v); | |
| 303 set_pixel(p->diagonal->image, c, r, d); | |
| 304 | |
| 305 n++; | |
| 306 | |
| 307 } | |
| 308 } | |
| 309 } | |
| 310 | |
| 311 if (verbose > 1) | |
| 312 fprintf(stderr, "%s: embedded %d bits at level %d\n", | |
| 313 progname, bits_per_level, l); | |
| 314 | |
| 315 // descend one level | |
| 316 p = p->coarse; | |
| 317 } | |
| 318 | |
| 319 idwt(dwts, image); | |
| 320 | |
| 321 pgm_writepgminit(out, cols, rows, maxval, 0); | |
| 322 | |
| 323 for (row = 0; row < rows; row++) | |
| 324 pgm_writepgmrow(out, image[row], cols, maxval, 0); | |
| 325 | |
| 326 fclose(out); | |
| 327 | |
| 328 pgm_freearray(image, rows); | |
| 329 | |
| 330 exit(0); | |
| 331 } |