Mercurial > hg > wm
annotate Meerwald-dir/wm_kim_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 |
|---|---|
| 0 | 1 #include "wm.h" |
| 2 #include "dwt.h" | |
|
24
9f20bce6184e
move directories, support netpbm 11
Peter Meerwald-Stadler <pmeerw@pmeerw.net>
parents:
16
diff
changeset
|
3 #include "netpbm/pgm.h" |
| 0 | 4 #include "dwt_util.h" |
| 5 #include "kim_common.h" | |
| 6 | |
| 7 char *progname; | |
| 8 | |
| 9 void usage(void) { | |
| 10 fprintf(stderr, "usage: %s [-a n] [-A n] [-e n] [-f n] [-F file] [-h] [-l n] [-o file] [-v n] -s file -i file file\n\n", progname); | |
| 11 fprintf(stderr, "\t-a n\t\talpha factor for detail subband\n"); | |
| 12 fprintf(stderr, "\t-A n\t\talpha factor for approximation image\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-i file\t\toriginal image file\n"); | |
| 18 fprintf(stderr, "\t-l n\t\tdecomposition level\n"); | |
| 19 fprintf(stderr, "\t-o file\t\tfile for extracted watermark\n"); | |
| 20 fprintf(stderr, "\t-s file\t\toriginal signature file\n"); | |
| 21 fprintf(stderr, "\t-v n\t\tverbosity level\n"); | |
| 22 exit(0); | |
| 23 } | |
| 24 | |
| 25 int extract_subband(Image_tree s, Image_tree t, int name, double alpha, double watermark[], double threshold, int w, int n, int verbose) { | |
| 26 int i, j; | |
| 27 | |
| 28 for (i = 5; i < s->image->height-5; i++) | |
| 29 for (j = 5; j < s->image->width-5; j++) { | |
| 30 double orig_coeff, input_coeff; | |
| 31 | |
| 32 orig_coeff = get_pixel(s->image, i, j); | |
| 33 input_coeff = get_pixel(t->image, i, j); | |
| 34 if (fabs(orig_coeff) > threshold) { | |
| 35 watermark[w++] = (input_coeff - orig_coeff) / (alpha * orig_coeff); | |
| 36 } | |
| 37 } | |
| 38 | |
| 39 if (verbose > 5) | |
| 40 fprintf(stderr, "%s: extracted %s%d, size %d x %d; %d coeffs. total\n", | |
| 41 progname, subband_name(name), s->level, s->image->width, s->image->height, w); | |
| 42 | |
| 43 return w; | |
| 44 } | |
| 45 | |
| 46 void write_mark(FILE *out, double watermark[], int n) { | |
| 47 int i; | |
| 48 | |
| 49 fprintf(out, "%d\n", n); | |
| 50 for (i = 0; i < n; i++) | |
| 51 fprintf(out, "%f\n", watermark[i]); | |
| 52 } | |
| 53 | |
| 54 int main(int argc, char *argv[]) { | |
| 55 | |
| 56 FILE *in = stdin; | |
| 57 FILE *out = stdout; | |
| 58 FILE *orig = NULL; | |
| 59 FILE *sig = NULL; | |
| 60 | |
| 61 gray **input_image; | |
| 62 gray **orig_image; | |
| 63 | |
| 64 char signature_name[MAXPATHLEN]; | |
| 65 char output_name[MAXPATHLEN] = "(stdout)"; | |
| 66 char input_name[MAXPATHLEN] = "(stdin)"; | |
| 67 char orig_name[MAXPATHLEN]; | |
| 68 | |
| 69 int c, w; | |
| 70 int n = 0; | |
| 71 int method = -1; | |
| 72 int filter = 0; | |
| 73 char filter_name[MAXPATHLEN] = ""; | |
| 74 | |
| 75 int level = 0, levels; | |
| 76 double alpha_detail = 0.0; | |
| 77 double alpha_approx = 0.0; | |
| 78 | |
| 79 int in_rows, in_cols, in_format; | |
| 80 gray in_maxval; | |
| 81 int orig_rows, orig_cols, orig_format; | |
| 82 gray orig_maxval; | |
| 83 int rows, cols; | |
| 8 | 84 int row; |
| 0 | 85 |
| 86 double *watermark; | |
| 87 | |
| 88 Image_tree input_dwts, orig_dwts, p, q; | |
| 89 | |
| 90 int verbose = 0; | |
| 91 | |
| 92 progname = argv[0]; | |
| 93 | |
| 94 pgm_init(&argc, argv); wm_init2(); | |
| 95 | |
| 96 while ((c = getopt(argc, argv, "a:A:e:f:F:h?i:l:o:s:v:")) != EOF) { | |
| 97 switch (c) { | |
| 98 case 'a': | |
| 99 alpha_detail = atof(optarg); | |
| 100 if (alpha_detail <= 0.0) { | |
| 101 fprintf(stderr, "%s: alpha factor %f out of range\n", progname, alpha_detail); | |
| 102 exit(1); | |
| 103 } | |
| 104 break; | |
| 105 case 'A': | |
| 106 alpha_approx = atof(optarg); | |
| 107 if (alpha_approx <= 0.0) { | |
| 108 fprintf(stderr, "%s: alpha factor %f out of range\n", progname, alpha_approx); | |
| 109 exit(1); | |
| 110 } | |
| 111 break; | |
| 112 case 'e': | |
| 113 method = atoi(optarg); | |
| 114 if (method < 0) { | |
| 115 fprintf(stderr, "%s: wavelet filtering method %d out of range\n", progname, method); | |
| 116 exit(1); | |
| 117 } | |
| 118 break; | |
| 119 case 'f': | |
| 120 filter = atoi(optarg); | |
| 121 if (filter <= 0) { | |
| 122 fprintf(stderr, "%s: filter number %d out of range\n", progname, filter); | |
| 123 exit(1); | |
| 124 } | |
| 125 break; | |
| 126 case 'F': | |
| 127 strcpy(filter_name, optarg); | |
| 128 break; | |
| 129 case 'h': | |
| 130 case '?': | |
| 131 usage(); | |
| 132 break; | |
| 133 case 'i': | |
| 134 if ((orig = fopen(optarg, "rb")) == NULL) { | |
| 135 fprintf(stderr, "%s: unable to open original image file %s\n", progname, optarg); | |
| 136 exit(1); | |
| 137 } | |
| 138 strcpy(orig_name, optarg); | |
| 139 break; | |
| 140 case 'l': | |
| 141 level = atoi(optarg); | |
| 142 if (level <= 0) { | |
| 143 fprintf(stderr, "%s: decomposition level %d out of range\n", progname, level); | |
| 144 exit(1); | |
| 145 } | |
| 146 break; | |
| 147 case 'o': | |
| 148 if ((out = fopen(optarg, "w")) == NULL) { | |
| 149 fprintf(stderr, "%s: unable to open output file %s\n", progname, optarg); | |
| 150 exit(1); | |
| 151 } | |
| 152 strcpy(output_name, optarg); | |
| 153 break; | |
| 154 case 's': | |
| 155 if ((sig = fopen(optarg, "r")) == NULL) { | |
| 156 fprintf(stderr, "%s: unable to open signature file %s\n", progname, optarg); | |
| 157 exit(1); | |
| 158 } | |
| 159 strcpy(signature_name, optarg); | |
| 160 break; | |
| 161 case 'v': | |
| 162 verbose = atoi(optarg); | |
| 163 if (verbose < 0) { | |
| 164 fprintf(stderr, "%s: verbosity level %d out of range\n", progname, verbose); | |
| 165 exit(1); | |
| 166 } | |
| 167 break; | |
| 168 } | |
| 169 } | |
| 170 | |
| 171 argc -= optind; | |
| 172 argv += optind; | |
| 173 | |
| 174 if (argc > 1) { | |
| 175 usage(); | |
| 176 exit(1); | |
| 177 } | |
| 178 | |
| 8 | 179 if (argc == 1 && *argv[0] != '-') { |
| 0 | 180 if ((in = fopen(argv[0], "rb")) == NULL) { |
| 181 fprintf(stderr, "%s: unable to open input file %s\n", progname, argv[0]); | |
| 182 exit(1); | |
| 183 } | |
| 184 else | |
| 185 strcpy(input_name, argv[0]); | |
| 8 | 186 } |
| 187 | |
| 0 | 188 if (!orig) { |
| 189 fprintf(stderr, "%s: original image file not specified, use -i file option\n", progname); | |
| 190 exit(1); | |
| 191 } | |
| 192 | |
| 193 if (sig) { | |
| 194 char line[32]; | |
| 195 fgets(line, sizeof(line), sig); | |
| 196 if (strspn(line, "KISG") >= 4) { | |
| 197 fscanf(sig, "%d\n", &n); | |
| 198 if (alpha_detail == 0.0) | |
| 199 fscanf(sig, "%lf\n", &alpha_detail); | |
| 200 else | |
|
16
4987db85cfae
fix another scanf() warning
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
15
diff
changeset
|
201 fscanf(sig, "%*f\n"); |
| 0 | 202 if (alpha_approx == 0.0) |
| 203 fscanf(sig, "%lf\n", &alpha_approx); | |
| 204 else | |
|
16
4987db85cfae
fix another scanf() warning
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
15
diff
changeset
|
205 fscanf(sig, "%*f\n"); |
| 0 | 206 if (level == 0) |
| 207 fscanf(sig, "%d\n", &level); | |
| 208 else | |
| 209 fscanf(sig, "%*d\n"); | |
| 210 if (method < 0) | |
| 211 fscanf(sig, "%d\n", &method); | |
| 212 else | |
| 213 fscanf(sig, "%*d\n"); | |
| 214 if (filter == 0) | |
| 215 fscanf(sig, "%d\n", &filter); | |
| 216 else | |
| 217 fscanf(sig, "%*d\n"); | |
| 218 if (!strcmp(filter_name, "")) | |
| 15 | 219 fscanf(sig, "%[^\n\r]\n", filter_name); |
| 0 | 220 else |
| 221 fscanf(sig, "%*[^\n\r]\n"); | |
| 222 } | |
| 223 else { | |
| 224 fprintf(stderr, "%s: invalid signature file %s\n", progname, signature_name); | |
| 225 exit(1); | |
| 226 } | |
| 227 fclose(sig); | |
| 228 } | |
| 229 else { | |
| 230 fprintf(stderr, "%s: signature file not specified, use -s file option\n", progname); | |
| 231 exit(1); | |
| 232 } | |
| 233 | |
| 234 pgm_readpgminit(in, &in_cols, &in_rows, &in_maxval, &in_format); | |
| 235 pgm_readpgminit(orig, &orig_cols, &orig_rows, &orig_maxval, &orig_format); | |
| 236 | |
| 237 if (in_cols != orig_cols || in_rows != orig_rows) { | |
| 238 fprintf(stderr, "%s: input image %s does not match dimensions of original image %s\n", progname, input_name, orig_name); | |
| 239 exit(1); | |
| 240 } | |
| 241 | |
| 242 cols = in_cols; | |
| 243 rows = in_rows; | |
| 244 | |
| 245 input_image = pgm_allocarray(in_cols, in_rows); | |
| 246 orig_image = pgm_allocarray(orig_cols, orig_rows); | |
| 247 | |
| 248 for (row = 0; row < in_rows; row++) { | |
| 249 pgm_readpgmrow(in, input_image[row], in_cols, in_maxval, in_format); | |
| 250 pgm_readpgmrow(orig, orig_image[row], orig_cols, orig_maxval, orig_format); | |
| 251 } | |
| 252 | |
| 253 fclose(in); | |
| 254 fclose(orig); | |
| 255 | |
| 256 // complete decomposition | |
| 257 levels = find_deepest_level(cols, rows) - 1; | |
| 258 if (level > levels) { | |
| 259 fprintf(stderr, "%s: decomposition level %d not possible (max. %d), image size is %d x %d\n", progname, level, levels, cols, rows); | |
| 260 exit(1); | |
| 261 } | |
| 262 | |
| 263 init_dwt(cols, rows, filter_name, filter, level, method); | |
| 264 #ifdef POLLEN_STUFF | |
| 3 | 265 #include "pollen_stuff.c" |
| 0 | 266 #endif |
| 267 #ifdef PARAM_STUFF | |
| 3 | 268 #include "param_stuff.c" |
| 0 | 269 #endif |
| 270 | |
| 271 input_dwts = fdwt(input_image); | |
| 272 orig_dwts = fdwt(orig_image); | |
| 273 | |
| 274 watermark = malloc((rows * cols) * sizeof(double)); | |
| 275 if (!watermark) { | |
| 276 fprintf(stderr, "%s: malloc() failed\n\n", progname); | |
| 277 exit(1); | |
| 278 } | |
| 279 | |
| 280 p = input_dwts; | |
| 281 q = orig_dwts; | |
| 282 w = 0; | |
| 283 while (p->coarse && q->coarse) { | |
| 284 int current_level; | |
| 285 double threshold; | |
| 286 double max_coeff; | |
| 287 double alpha; | |
| 288 | |
| 289 // get current decomposition level number | |
| 290 current_level = q->horizontal->level; | |
| 291 | |
| 292 // find largest absolute coefficient in detail subbands of current decomposition level | |
| 293 max_coeff = find_level_largest_coeff(q, verbose); | |
| 294 | |
| 295 // calculate significance threshold for current decomposition level | |
| 296 threshold = calc_level_threshold(max_coeff, verbose); | |
| 297 | |
| 298 // calculate embedding strength alpha for current decomposition level | |
| 299 alpha = calc_level_alpha_detail(alpha_detail, level, current_level, verbose); | |
| 300 | |
| 301 if (verbose > 1) | |
| 302 fprintf(stderr, "%s: level %d, threshold %f, alpha %f\n", progname, current_level, threshold, alpha); | |
| 303 | |
| 304 w = extract_subband(q->horizontal, p->horizontal, HORIZONTAL, alpha, watermark, threshold, w, n, verbose); | |
| 305 w = extract_subband(q->vertical, p->vertical, VERTICAL, alpha, watermark, threshold, w, n, verbose); | |
| 306 w = extract_subband(q->diagonal, p->diagonal, DIAGONAL, alpha, watermark, threshold, w, n, verbose); | |
| 307 | |
| 308 p = p->coarse; | |
| 309 q = q->coarse; | |
| 310 } | |
| 311 | |
| 312 // extract watermark from approximation image using calculated significance threshold and embedding strength | |
| 313 w = extract_subband(q, p, COARSE, alpha_approx, watermark, calc_level_threshold(find_subband_largest_coeff(q, COARSE, verbose), verbose), w, n, verbose); | |
| 314 | |
| 315 fprintf(out, "KIWM\n"); | |
| 316 write_mark(out, watermark, w); | |
| 317 | |
| 318 fclose(out); | |
| 319 | |
| 320 free(watermark); | |
| 321 | |
| 322 pgm_freearray(input_image, rows); | |
| 323 pgm_freearray(orig_image, rows); | |
| 324 | |
| 325 exit(0); | |
| 326 } |