Mercurial > hg > wm
annotate Meerwald/wm_wang_e.c @ 21:1c4ccd635a68 v0.6
ignore *.swp
| author | Peter Meerwald-Stadler <pmeerw@pmeerw.net> |
|---|---|
| date | Sat, 28 Jan 2023 23:57:40 +0100 |
| parents | 4987db85cfae |
| children |
| rev | line source |
|---|---|
| 0 | 1 #include "wm.h" |
| 2 #include "dwt.h" | |
| 3 #include "wang_common.h" | |
| 4 #include "dwt_util.h" | |
| 5 #include "pgm.h" | |
| 6 | |
| 7 char *progname; | |
| 8 | |
| 9 void usage(void) { | |
| 10 fprintf(stderr, "usage: %s [-a n] [-b n] [-e n] [-f n] [-F n] [-h] [-o file] [-v n] -s file file\n\n", progname); | |
| 11 fprintf(stderr, "\t-a n\t\talpha factor/embedding strength\n"); | |
| 12 fprintf(stderr, "\t-b n\t\tsubband weighting factor\n"); | |
| 13 fprintf(stderr, "\t-e n\t\twavelet filtering method\n"); | |
| 14 fprintf(stderr, "\t-f n\t\tfilter number\n"); | |
| 15 fprintf(stderr, "\t-F file\t\tfilter definition file\n"); | |
| 16 fprintf(stderr, "\t-h\t\tprint usage\n"); | |
| 17 fprintf(stderr, "\t-o file\t\toutput (watermarked) file\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 int i, c, w; | |
| 8 | 34 int row; |
| 0 | 35 |
| 36 int n; | |
| 37 | |
| 38 double alpha = 0.0; | |
| 39 double beta = 0.0; | |
| 40 | |
| 41 int filter = 0; | |
| 42 int method = -1; | |
| 3 | 43 int level = 0; |
| 0 | 44 char filter_name[MAXPATHLEN] = ""; |
| 45 | |
| 46 int verbose = 0; | |
| 47 | |
| 48 gray **image; | |
| 49 Image_tree dwts; | |
| 50 | |
| 51 gray maxval; | |
| 8 | 52 int rows, cols, format; |
| 0 | 53 |
| 54 double *watermark; | |
| 55 | |
| 56 progname = argv[0]; | |
| 57 | |
| 58 pgm_init(&argc, argv); wm_init(); | |
| 59 | |
| 60 while ((c = getopt(argc, argv, "a:b:e:f:F:h?o:s:v:")) != EOF) { | |
| 61 switch (c) { | |
| 62 case 'a': | |
| 63 alpha = atof(optarg); | |
| 64 if (alpha <= 0.0) { | |
| 65 fprintf(stderr, "%s: alpha factor %f out of range\n", progname, alpha); | |
| 66 exit(1); | |
| 67 } | |
| 68 break; | |
| 69 case 'b': | |
| 70 beta = atof(optarg); | |
| 71 if (beta <= 0.0) { | |
| 72 fprintf(stderr, "%s: beta factor %f out of range\n", progname, beta); | |
| 73 exit(1); | |
| 74 } | |
| 75 break; | |
| 76 case 'e': | |
| 77 method = atoi(optarg); | |
| 78 if (method < 0) { | |
| 79 fprintf(stderr, "%s: wavelet filtering method %d out of range\n", progname, method); | |
| 80 exit(1); | |
| 81 } | |
| 82 break; | |
| 83 case 'f': | |
| 84 filter = atoi(optarg); | |
| 85 if (filter <= 0) { | |
| 86 fprintf(stderr, "%s: filter number %d out of range\n", progname, filter); | |
| 87 exit(1); | |
| 88 } | |
| 89 break; | |
| 90 case 'F': | |
| 91 strcpy(filter_name, optarg); | |
| 92 break; | |
| 93 case 'h': | |
| 94 case '?': | |
| 95 usage(); | |
| 96 break; | |
| 97 case 'o': | |
| 98 if ((out = fopen(optarg, "wb")) == NULL) { | |
| 99 fprintf(stderr, "%s: unable to open output file %s\n", progname, optarg); | |
| 100 exit(1); | |
| 101 } | |
| 102 strcpy(output_name, optarg); | |
| 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] != '-') { |
| 0 | 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 | |
| 0 | 138 if (sig) { |
| 139 char line[32]; | |
| 140 fgets(line, sizeof(line), sig); | |
| 141 if (strspn(line, "WGSG") >= 4) { | |
| 142 fscanf(sig, "%d\n", &n); | |
| 143 if (alpha == 0.0) | |
| 144 fscanf(sig, "%lf\n", &alpha); | |
| 145 else | |
|
16
4987db85cfae
fix another scanf() warning
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
15
diff
changeset
|
146 fscanf(sig, "%*f\n"); |
| 0 | 147 if (beta == 0.0) |
| 148 fscanf(sig, "%lf\n", &beta); | |
| 149 else | |
|
16
4987db85cfae
fix another scanf() warning
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
15
diff
changeset
|
150 fscanf(sig, "%*f\n"); |
| 0 | 151 if (method < 0) |
| 152 fscanf(sig, "%d\n", &method); | |
| 153 else | |
| 154 fscanf(sig, "%*d\n"); | |
| 155 if (filter == 0) | |
| 156 fscanf(sig, "%d\n", &filter); | |
| 157 else | |
| 158 fscanf(sig, "%*d\n"); | |
| 159 if (!strcmp(filter_name, "")) | |
| 15 | 160 fscanf(sig, "%[^\n\r]\n", filter_name); |
| 0 | 161 else |
| 162 fscanf(sig, "%*[^\n\r]\n"); | |
| 163 } | |
| 164 else { | |
| 165 fprintf(stderr, "%s: invalid signature file %s\n", progname, signature_name); | |
| 166 exit(1); | |
| 167 } | |
| 168 } | |
| 169 else { | |
| 170 fprintf(stderr, "%s: signature file not specified, use -s file option\n", progname); | |
| 171 exit(1); | |
| 172 } | |
| 173 | |
| 174 watermark = malloc(n * sizeof(double)); | |
| 175 for (i = 0; i < n; i++) | |
| 176 fscanf(sig, "%lf\n", &watermark[i]); | |
| 177 fclose(sig); | |
| 178 | |
| 179 pgm_readpgminit(in, &cols, &rows, &maxval, &format); | |
| 180 | |
| 181 image = pgm_allocarray(cols, rows); | |
| 182 | |
| 183 for (row = 0; row < rows; row++) | |
| 184 pgm_readpgmrow(in, image[row], cols, maxval, format); | |
| 185 | |
| 186 fclose(in); | |
| 187 | |
| 188 // complete decomposition | |
| 3 | 189 level = find_deepest_level(cols, rows) - 1; |
| 0 | 190 |
| 191 // wavelet transform | |
| 3 | 192 init_dwt(cols, rows, filter_name, filter, level, method); |
| 0 | 193 #ifdef POLLEN_STUFF |
| 3 | 194 #include "pollen_stuff.c" |
| 0 | 195 #endif |
| 196 #ifdef PARAM_STUFF | |
| 3 | 197 #include "param_stuff.c" |
| 0 | 198 #endif |
| 199 | |
| 200 dwts = fdwt(image); | |
| 201 | |
| 202 // build tree for subband selection, calculate subband thresholds | |
| 203 init_subbands(dwts); | |
| 204 set_subbands_type_beta(HORIZONTAL, beta); | |
| 205 set_subbands_type_beta(VERTICAL, beta); | |
| 206 calc_subbands_threshold(); | |
| 207 | |
| 208 w = 0; | |
| 209 while (w < n) { | |
| 210 Subband_data s; | |
| 211 | |
| 212 // select subband with max. threshold | |
| 213 s = select_subband(); | |
| 214 if (verbose > 1) | |
| 215 fprintf(stderr, "%s: selected subband %s%d, T=%lf, beta=%lf\n", progname, subband_name(s->type), s->level, s->T, s->beta); | |
| 216 | |
| 217 // watermark significant coefficients and set them selected | |
| 218 // check is entire signature has been embedded | |
| 219 c = select_subband_coeff(s); | |
| 220 do { | |
| 221 double p; | |
| 222 if (c < 0) | |
| 223 // no more significant coefficients in subband | |
| 224 break; | |
| 225 | |
| 226 p = get_subband_coeff(s, c); | |
| 227 if (p < s->Cmax) { | |
| 228 if (verbose > 2) | |
| 229 fprintf(stderr, "%s: embedding sig. coeff. #%d (= %lf)\n into %s%d coeff. #%d\n", | |
| 230 progname, w, watermark[w], subband_name(s->type), s->level, c); | |
| 231 | |
| 232 p = p + alpha * s->beta * s->T * watermark[w]; | |
| 233 set_subband_coeff(s, c, p); | |
| 234 w++; | |
| 235 } | |
| 236 mark_subband_coeff(s, c); | |
| 237 | |
| 238 // select next significant coefficient | |
| 239 c = select_subband_coeff_from(s, c); | |
| 240 } while (w < n); | |
| 241 | |
| 242 // update subband threshold | |
| 243 s->T /= 2.0; | |
| 244 | |
| 245 } | |
| 246 | |
| 247 free_subbands(); | |
| 248 | |
| 249 free(watermark); | |
| 250 | |
| 251 idwt(dwts, image); | |
| 252 | |
| 253 pgm_writepgminit(out, cols, rows, maxval, 0); | |
| 254 | |
| 255 for (row = 0; row < rows; row++) | |
| 256 pgm_writepgmrow(out, image[row], cols, maxval, 0); | |
| 257 | |
| 258 fclose(out); | |
| 259 | |
| 260 pgm_freearray(image, rows); | |
| 261 | |
| 262 exit(0); | |
| 263 } |