Mercurial > hg > wm
annotate Meerwald-dir/wm_kund3_d.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_kund3_d.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] [-s file] [-v n] file\n\n", progname); | |
| 10 fprintf(stderr, "\t-e n\t\twavelet filtering method\n"); | |
| 11 fprintf(stderr, "\t-f n\t\tfilter number\n"); | |
| 12 fprintf(stderr, "\t-F file\t\tfilter definition file\n"); | |
| 13 fprintf(stderr, "\t-h\t\tprint usage\n"); | |
| 14 fprintf(stderr, "\t-l n\t\tembedding level\n"); | |
| 15 fprintf(stderr, "\t-o file\t\textracted signature file\n"); | |
| 16 fprintf(stderr, "\t-q n\t\tsignature strength\n"); | |
| 17 fprintf(stderr, "\t-s file\t\toriginal signature file\n"); | |
| 18 fprintf(stderr, "\t-v n\t\tverbosity level\n"); | |
| 19 exit(0); | |
| 20 } | |
| 21 | |
| 22 int main(int argc, char *argv[]) { | |
| 23 | |
| 24 FILE *in = stdin; | |
| 25 FILE *out = stdout; | |
| 26 FILE *sig = NULL; | |
| 27 | |
| 28 gray **input_image; | |
| 29 | |
| 30 char signature_name[MAXPATHLEN]; | |
| 31 char output_name[MAXPATHLEN] = "(stdout)"; | |
| 32 char input_name[MAXPATHLEN] = "(stdin)"; | |
| 33 | |
| 34 int r, c; | |
| 35 int quality = 0; | |
| 36 int seed = 0; | |
| 37 int n = 0; | |
| 38 int method = -1; | |
| 39 int filter = 0; | |
| 40 char filter_name[MAXPATHLEN] = ""; | |
| 41 | |
| 42 char *binstr; | |
| 43 | |
| 44 int level = 0; | |
| 45 | |
| 46 int in_rows, in_cols, in_format; | |
| 47 gray in_maxval; | |
| 48 int rows, cols; | |
| 49 int row, col; | |
| 50 | |
| 51 Image_tree dwts, p; | |
| 52 | |
| 53 int verbose = 0; | |
| 54 | |
| 55 progname = argv[0]; | |
| 56 | |
| 57 pgm_init(&argc, argv); | |
| 58 wm_init(); | |
| 59 | |
| 60 while ((c = getopt(argc, argv, "e:f:F:h?l:o:q:s:v:")) != EOF) { | |
| 61 switch (c) { | |
| 62 case 'e': | |
| 63 method = atoi(optarg); | |
| 64 if (method < 0) { | |
| 65 fprintf(stderr, "%s: wavelet filtering method %d out of range\n", progname, method); | |
| 66 exit(1); | |
| 67 } | |
| 68 break; | |
| 69 case 'f': | |
| 70 filter = atoi(optarg); | |
| 71 if (filter <= 0) { | |
| 72 fprintf(stderr, "%s: filter number %d out of range\n", progname, filter); | |
| 73 exit(1); | |
| 74 } | |
| 75 break; | |
| 76 case 'F': | |
| 77 strcpy(filter_name, optarg); | |
| 78 break; | |
| 79 case 'h': | |
| 80 case '?': | |
| 81 usage(); | |
| 82 break; | |
| 83 case 'l': | |
| 84 level = atoi(optarg); | |
| 85 if (level < 1) { | |
| 86 fprintf(stderr, "%s: embedding level out of range\n", progname); | |
| 87 exit(1); | |
| 88 } | |
| 89 break; | |
| 90 case 'o': | |
| 91 if ((out = fopen(optarg, "w")) == NULL) { | |
| 92 fprintf(stderr, "%s: unable to open output file %s\n", progname, optarg); | |
| 93 exit(1); | |
| 94 } | |
| 95 strcpy(output_name, optarg); | |
| 96 break; | |
| 97 case 'q': | |
| 98 quality = atoi(optarg); | |
| 99 if (quality < 1) { | |
| 100 fprintf(stderr, "%s: quality level %d out of range\n", progname, quality); | |
| 101 exit(1); | |
| 102 } | |
| 103 break; | |
| 104 case 's': | |
| 105 if ((sig = fopen(optarg, "r")) == NULL) { | |
| 106 fprintf(stderr, "%s: unable to open signature file %s\n", progname, optarg); | |
| 107 exit(1); | |
| 108 } | |
| 109 strcpy(signature_name, optarg); | |
| 110 break; | |
| 111 case 'v': | |
| 112 verbose = atoi(optarg); | |
| 113 if (verbose < 0) { | |
| 114 fprintf(stderr, "%s: verbosity level %d out of range\n", progname, verbose); | |
| 115 exit(1); | |
| 116 } | |
| 117 break; | |
| 118 } | |
| 119 } | |
| 120 | |
| 121 argc -= optind; | |
| 122 argv += optind; | |
| 123 | |
| 124 if (argc > 1) { | |
| 125 usage(); | |
| 126 exit(1); | |
| 127 } | |
| 128 | |
| 8 | 129 if (argc == 1 && *argv[0] != '-') { |
| 3 | 130 if ((in = fopen(argv[0], "rb")) == NULL) { |
| 131 fprintf(stderr, "%s: unable to open input file %s\n", progname, argv[0]); | |
| 132 exit(1); | |
| 133 } | |
| 134 else | |
| 135 strcpy(input_name, argv[0]); | |
| 8 | 136 } |
| 137 | |
| 3 | 138 if (sig) { |
| 139 char line[32]; | |
| 140 fgets(line, sizeof(line), sig); | |
| 141 if (strspn(line, "KD3SG") >= 5) { | |
| 142 fscanf(sig, "%d\n", &nbit_signature); | |
| 143 if (quality == 0) | |
| 144 fscanf(sig, "%d\n", &quality); | |
| 145 else | |
| 146 fscanf(sig, "%*d\n"); | |
| 147 if (method < 0) | |
| 148 fscanf(sig, "%d\n", &method); | |
| 149 else | |
| 150 fscanf(sig, "%*d\n"); | |
| 151 if (filter == 0) | |
| 152 fscanf(sig, "%d\n", &filter); | |
| 153 else | |
| 154 fscanf(sig, "%*d\n"); | |
| 155 if (!strcmp(filter_name, "")) | |
| 15 | 156 fscanf(sig, "%[^\n\r]\n", filter_name); |
| 3 | 157 else |
| 158 fscanf(sig, "%*[^\n\r]\n"); | |
| 159 if (level == 0) | |
| 160 fscanf(sig, "%d\n", &level); | |
| 161 else | |
| 162 fscanf(sig, "%*d\n"); | |
| 163 fscanf(sig, "%d\n", &seed); | |
| 164 srandom(seed); | |
| 165 nbit_signature2 = nbit_signature; | |
| 166 n_signature = n_signature2 = NBITSTOBYTES(nbit_signature2); | |
| 167 binstr = malloc((nbit_signature2 + 1) * sizeof(char)); | |
| 168 fscanf(sig, "%[01]\n", binstr); | |
| 169 binstr_to_sig2(binstr); | |
| 170 free(binstr); | |
| 171 init_signature_bits(); | |
| 172 } | |
| 173 else { | |
| 174 fprintf(stderr, "%s: invalid signature file %s\n", progname, signature_name); | |
| 175 exit(1); | |
| 176 } | |
| 177 fclose(sig); | |
| 178 } | |
| 179 else { | |
| 180 fprintf(stderr, "%s: signature file not specified, use -s file option\n", progname); | |
| 181 exit(1); | |
| 182 } | |
| 183 | |
| 184 pgm_readpgminit(in, &in_cols, &in_rows, &in_maxval, &in_format); | |
| 185 | |
| 186 cols = in_cols; | |
| 187 rows = in_rows; | |
| 188 | |
| 189 if (verbose > 0) | |
| 190 fprintf(stderr, "%s: extracting %d bits with quality %d from\n" | |
| 191 " %d x %d host image, decomposition level %d\n", | |
| 192 progname, nbit_signature, quality, cols, rows, level); | |
| 193 | |
| 194 input_image = pgm_allocarray(in_cols, in_rows); | |
| 195 | |
| 196 for (row = 0; row < in_rows; row++) | |
| 197 pgm_readpgmrow(in, input_image[row], in_cols, in_maxval, in_format); | |
| 198 | |
| 199 fclose(in); | |
| 200 | |
| 201 init_dwt(cols, rows, filter_name, filter, level, method); | |
| 202 /*#ifdef POLLEN_STUFF | |
| 203 #include "pollen_stuff.c" | |
| 204 #endif | |
| 205 #ifdef PARAM_STUFF | |
| 206 #include "param_stuff.c" | |
| 207 #endif*/ | |
| 208 | |
| 209 dwts = fdwt(input_image); | |
| 210 | |
| 211 p = dwts; | |
| 212 | |
| 213 #define STEP 3 | |
| 214 | |
| 215 // consider each resolution level | |
| 216 while (p->coarse->level < level) | |
| 217 // descend one level | |
| 218 p = p->coarse; | |
| 219 | |
| 220 // start to extracting watermark from beginning at each level | |
| 221 { | |
| 222 // get width and height of detail images at current level | |
| 223 int lwidth = p->vertical->image->width; | |
| 224 int lheight = p->vertical->image->height; | |
| 225 | |
| 226 if (verbose > 1) | |
| 227 fprintf(stderr, "%s: extracting at level %d now, size %d x %d\n", | |
| 228 progname, p->coarse->level, lwidth, lheight); | |
| 229 | |
| 230 // consider each coefficient at resolution level | |
| 231 for (row = 0; row < lwidth - STEP; row += STEP) | |
| 232 for (col = 0; col < lheight - STEP; col += STEP) { | |
| 233 double h, v, d; | |
| 234 double *f1 = &h, *f2 = &v, *f3 = &d; | |
| 235 double delta; | |
| 236 | |
| 237 // key-dependant coefficient selection | |
| 238 r = row + 1 + random() % (STEP-2); | |
| 239 c = col + 1 + random() % (STEP-2); | |
| 240 | |
| 241 // get coefficient values, one from each detail image | |
| 242 h = get_pixel(p->horizontal->image, c, r); | |
| 243 v = get_pixel(p->vertical->image, c, r); | |
| 244 d = get_pixel(p->diagonal->image, c, r); | |
| 245 | |
| 246 // order pointer to coefficient values such that f1 <= f2 <= f3 | |
| 247 #define SWAP(A, B) {double *t = A; A = B; B = t;} | |
| 248 if (*f1 > *f2) SWAP(f1, f2); | |
| 249 if (*f2 > *f3) SWAP(f2, f3); | |
| 250 if (*f1 > *f2) SWAP(f1, f2); | |
| 251 | |
| 252 // calculate delta, the width of the bins | |
| 253 delta = (*f3 - *f1) / (double) (2 * quality - 1); | |
| 254 | |
| 255 // set middle coefficient to closest appropriate bin, | |
| 256 // according to watermark bit | |
| 257 if (quality == 1) | |
| 258 set_signature_bit(n, (*f3 - *f2) < (*f2 - *f1)); | |
| 259 else { | |
| 260 double l = *f1; | |
| 261 int i = 0; | |
| 262 while ((l + delta) < *f2) { | |
| 263 l += delta; | |
| 264 i++; | |
| 265 } | |
| 266 if (i % 2) | |
| 267 set_signature_bit(n, (l + delta - *f2) > (*f2 - l)); | |
| 268 else | |
| 269 set_signature_bit(n, (l + delta - *f2) < (*f2 - l)); | |
| 270 } | |
| 271 | |
| 272 if (verbose > 2) | |
| 273 fprintf(stderr, "%s: extracted bit #%d (= %d =? %d) at (%d/%d),\n" | |
| 274 " f1=%lf, f2=%lf, f3=%lf\n", progname, n, | |
| 275 get_signature_bit(n), get_signature2_bit(n), | |
| 276 c, r, *f1, *f2, *f3); | |
| 277 n++; | |
| 278 } | |
| 279 } | |
| 280 | |
| 281 fprintf(out, "KD3WM\n"); | |
| 282 fprintf(out, "%d\n", n); | |
| 283 nbit_signature = n; | |
| 284 binstr = malloc(sizeof(char) * (nbit_signature + 1)); | |
| 285 sig_to_binstr(binstr); | |
| 286 fprintf(out, "%s\n", binstr); | |
| 287 free(binstr); | |
| 288 fclose(out); | |
| 289 | |
| 290 pgm_freearray(input_image, rows); | |
| 291 | |
| 292 exit(0); | |
| 293 } |