Mercurial > hg > wm
comparison Meerwald-dir/wm_kim_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_kim_e.c@4987db85cfae |
| children |
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| 23:71dd4b96221b | 24:9f20bce6184e |
|---|---|
| 1 #include "wm.h" | |
| 2 #include "dwt.h" | |
| 3 #include "netpbm/pgm.h" | |
| 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 n] [-h] [-l n] [-o file] [-v n] -s file file\n\n", progname); | |
| 11 fprintf(stderr, "\t-a n\t\talpha factor/embedding strength for detail subbands\n"); | |
| 12 fprintf(stderr, "\t-a n\t\talpha factor/embedding strength for approximation subband\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-l n\t\tdecomposition level\n"); | |
| 18 fprintf(stderr, "\t-o file\t\toutput (watermarked) file\n"); | |
| 19 fprintf(stderr, "\t-s file\t\tsignature to embed in input image\n"); | |
| 20 fprintf(stderr, "\t-v n\t\tverbosity level\n"); | |
| 21 exit(0); | |
| 22 } | |
| 23 | |
| 24 int mark_subband(Image_tree s, int name, double alpha, double watermark[], double threshold, int w, int n, int verbose) { | |
| 25 int i, j; | |
| 26 | |
| 27 for (i = 5; i < s->image->height-5; i++) | |
| 28 for (j = 5; j < s->image->width-5; j++) { | |
| 29 double coeff, newcoeff; | |
| 30 | |
| 31 coeff = get_pixel(s->image, i, j); | |
| 32 if (fabs(coeff) > threshold) { | |
| 33 newcoeff = coeff + alpha * coeff * watermark[w % n]; | |
| 34 set_pixel(s->image, i, j, newcoeff); | |
| 35 | |
| 36 if (verbose >= 9) | |
| 37 fprintf(stderr, "%s: (%d/%d) %f: %f -> %f\n", progname, j, i, watermark[w % n], coeff, newcoeff); | |
| 38 | |
| 39 w++; | |
| 40 } | |
| 41 } | |
| 42 | |
| 43 if (verbose > 5) | |
| 44 fprintf(stderr, "%s: watermarking %s%d, size %d x %d; embedded %d coeffs. total\n", | |
| 45 progname, subband_name(name), s->level, s->image->width, s->image->height, w); | |
| 46 | |
| 47 return w; | |
| 48 } | |
| 49 | |
| 50 int main(int argc, char *argv[]) { | |
| 51 | |
| 52 FILE *in = stdin; | |
| 53 FILE *out = stdout; | |
| 54 FILE *sig = NULL; | |
| 55 | |
| 56 char output_name[MAXPATHLEN] = "(stdout)"; | |
| 57 char input_name[MAXPATHLEN] = "(stdin)"; | |
| 58 char signature_name[MAXPATHLEN]; | |
| 59 | |
| 60 int i, c, w; | |
| 61 int row; | |
| 62 | |
| 63 int n; | |
| 64 | |
| 65 double alpha_detail = 0.0; | |
| 66 double alpha_approx = 0.0; | |
| 67 int level = 0; | |
| 68 | |
| 69 int filter = 0; | |
| 70 int method = -1; | |
| 71 int levels; | |
| 72 char filter_name[MAXPATHLEN] = ""; | |
| 73 | |
| 74 int verbose = 0; | |
| 75 | |
| 76 gray **image; | |
| 77 Image_tree p, dwts; | |
| 78 | |
| 79 gray maxval; | |
| 80 int rows, cols, format; | |
| 81 | |
| 82 double *watermark; | |
| 83 | |
| 84 progname = argv[0]; | |
| 85 | |
| 86 pgm_init(&argc, argv); wm_init(); | |
| 87 | |
| 88 while ((c = getopt(argc, argv, "a:A:e:f:F:h?o:l:s:v:")) != EOF) { | |
| 89 switch (c) { | |
| 90 case 'a': | |
| 91 alpha_detail = atof(optarg); | |
| 92 if (alpha_detail <= 0.0) { | |
| 93 fprintf(stderr, "%s: alpha factor %f out of range\n", progname, alpha_detail); | |
| 94 exit(1); | |
| 95 } | |
| 96 break; | |
| 97 case 'A': | |
| 98 alpha_approx = atof(optarg); | |
| 99 if (alpha_approx <= 0.0) { | |
| 100 fprintf(stderr, "%s: alpha factor %f out of range\n", progname, alpha_approx); | |
| 101 exit(1); | |
| 102 } | |
| 103 break; | |
| 104 case 'l': | |
| 105 level = atoi(optarg); | |
| 106 if (level <= 0) { | |
| 107 fprintf(stderr, "%s: decomposition level %d out of range\n", progname, level); | |
| 108 exit(1); | |
| 109 } | |
| 110 break; | |
| 111 case 'e': | |
| 112 method = atoi(optarg); | |
| 113 if (method < 0) { | |
| 114 fprintf(stderr, "%s: wavelet filtering method %d out of range\n", progname, method); | |
| 115 exit(1); | |
| 116 } | |
| 117 break; | |
| 118 case 'f': | |
| 119 filter = atoi(optarg); | |
| 120 if (filter <= 0) { | |
| 121 fprintf(stderr, "%s: filter number %d out of range\n", progname, filter); | |
| 122 exit(1); | |
| 123 } | |
| 124 break; | |
| 125 case 'F': | |
| 126 strcpy(filter_name, optarg); | |
| 127 break; | |
| 128 case 'h': | |
| 129 case '?': | |
| 130 usage(); | |
| 131 break; | |
| 132 case 'o': | |
| 133 if ((out = fopen(optarg, "wb")) == NULL) { | |
| 134 fprintf(stderr, "%s: unable to open output file %s\n", progname, optarg); | |
| 135 exit(1); | |
| 136 } | |
| 137 strcpy(output_name, optarg); | |
| 138 break; | |
| 139 case 's': | |
| 140 if ((sig = fopen(optarg, "r")) == NULL) { | |
| 141 fprintf(stderr, "%s: unable to open signature file %s\n", progname, optarg); | |
| 142 exit(1); | |
| 143 } | |
| 144 strcpy(signature_name, optarg); | |
| 145 break; | |
| 146 case 'v': | |
| 147 verbose = atoi(optarg); | |
| 148 if (verbose < 0) { | |
| 149 fprintf(stderr, "%s: verbosity level %d out of range\n", progname, verbose); | |
| 150 exit(1); | |
| 151 } | |
| 152 break; | |
| 153 } | |
| 154 } | |
| 155 | |
| 156 argc -= optind; | |
| 157 argv += optind; | |
| 158 | |
| 159 if (argc > 1) { | |
| 160 usage(); | |
| 161 exit(1); | |
| 162 } | |
| 163 | |
| 164 if (argc == 1 && *argv[0] != '-') { | |
| 165 if ((in = fopen(argv[0], "rb")) == NULL) { | |
| 166 fprintf(stderr, "%s: unable to open input file %s\n", progname, argv[0]); | |
| 167 exit(1); | |
| 168 } | |
| 169 else | |
| 170 strcpy(input_name, argv[0]); | |
| 171 } | |
| 172 | |
| 173 if (sig) { | |
| 174 char line[32]; | |
| 175 fgets(line, sizeof(line), sig); | |
| 176 if (strspn(line, "KISG") >= 4) { | |
| 177 fscanf(sig, "%d\n", &n); | |
| 178 if (alpha_detail == 0.0) | |
| 179 fscanf(sig, "%lf\n", &alpha_detail); | |
| 180 else | |
| 181 fscanf(sig, "%*f\n"); | |
| 182 if (alpha_approx == 0.0) | |
| 183 fscanf(sig, "%lf\n", &alpha_approx); | |
| 184 else | |
| 185 fscanf(sig, "%*f\n"); | |
| 186 if (level == 0) | |
| 187 fscanf(sig, "%d\n", &level); | |
| 188 else | |
| 189 fscanf(sig, "%*d\n"); | |
| 190 if (method < 0) | |
| 191 fscanf(sig, "%d\n", &method); | |
| 192 else | |
| 193 fscanf(sig, "%*d\n"); | |
| 194 if (filter == 0) | |
| 195 fscanf(sig, "%d\n", &filter); | |
| 196 else | |
| 197 fscanf(sig, "%*d\n"); | |
| 198 if (!strcmp(filter_name, "")) | |
| 199 fscanf(sig, "%[^\n\r]\n", filter_name); | |
| 200 else | |
| 201 fscanf(sig, "%*[^\n\r]\n"); | |
| 202 } | |
| 203 else { | |
| 204 fprintf(stderr, "%s: invalid signature file %s\n", progname, signature_name); | |
| 205 exit(1); | |
| 206 } | |
| 207 } | |
| 208 else { | |
| 209 fprintf(stderr, "%s: signature file not specified, use -s file option\n", progname); | |
| 210 exit(1); | |
| 211 } | |
| 212 | |
| 213 watermark = malloc(n * sizeof(double)); | |
| 214 for (i = 0; i < n; i++) | |
| 215 fscanf(sig, "%lf\n", &watermark[i]); | |
| 216 fclose(sig); | |
| 217 | |
| 218 pgm_readpgminit(in, &cols, &rows, &maxval, &format); | |
| 219 image = pgm_allocarray(cols, rows); | |
| 220 for (row = 0; row < rows; row++) | |
| 221 pgm_readpgmrow(in, image[row], cols, maxval, format); | |
| 222 fclose(in); | |
| 223 | |
| 224 // complete decomposition | |
| 225 levels = find_deepest_level(cols, rows) - 1; | |
| 226 if (level > levels) { | |
| 227 fprintf(stderr, "%s: decomposition level %d not possible (max. %d), image size is %d x %d\n", progname, level, levels, cols, rows); | |
| 228 exit(1); | |
| 229 } | |
| 230 | |
| 231 // wavelet transform | |
| 232 init_dwt(cols, rows, filter_name, filter, level, method); | |
| 233 #ifdef POLLEN_STUFF | |
| 234 #include "pollen_stuff.c" | |
| 235 #endif | |
| 236 #ifdef PARAM_STUFF | |
| 237 #include "param_stuff.c" | |
| 238 #endif | |
| 239 | |
| 240 dwts = fdwt(image); | |
| 241 | |
| 242 p = dwts; | |
| 243 w = 0; | |
| 244 | |
| 245 // process each decomposition level | |
| 246 while (p->coarse) { | |
| 247 int current_level; | |
| 248 double threshold; | |
| 249 double max_coeff; | |
| 250 double alpha; | |
| 251 | |
| 252 // get current decomposition level number | |
| 253 current_level = p->horizontal->level; | |
| 254 | |
| 255 // find largest absolute coefficient in detail subbands of current decomposition level | |
| 256 max_coeff = find_level_largest_coeff(p, verbose); | |
| 257 | |
| 258 // calculate significance threshold for current decomposition level | |
| 259 threshold = calc_level_threshold(max_coeff, verbose); | |
| 260 | |
| 261 // calculate embedding strength alpha for current decomposition level | |
| 262 alpha = calc_level_alpha_detail(alpha_detail, level, current_level, verbose); | |
| 263 | |
| 264 if (verbose > 1) | |
| 265 fprintf(stderr, "%s: level %d, threshold %f, alpha %f\n", progname, current_level, threshold, alpha); | |
| 266 | |
| 267 // embed watermark sequence into detail subbands of current decomposition level | |
| 268 w = mark_subband(p->horizontal, HORIZONTAL, alpha, watermark, threshold, w, n, verbose); | |
| 269 w = mark_subband(p->vertical, VERTICAL, alpha, watermark, threshold, w, n, verbose); | |
| 270 w = mark_subband(p->diagonal, DIAGONAL, alpha, watermark, threshold, w, n, verbose); | |
| 271 | |
| 272 p = p->coarse; | |
| 273 } | |
| 274 | |
| 275 // mark approximation image using calculated significance threshold and embedding strength | |
| 276 w = mark_subband(p, COARSE, alpha_approx, watermark, calc_level_threshold(find_subband_largest_coeff(p, COARSE, verbose), verbose), w, n, verbose); | |
| 277 | |
| 278 free(watermark); | |
| 279 idwt(dwts, image); | |
| 280 | |
| 281 pgm_writepgminit(out, cols, rows, maxval, 0); | |
| 282 for (row = 0; row < rows; row++) | |
| 283 pgm_writepgmrow(out, image[row], cols, maxval, 0); | |
| 284 fclose(out); | |
| 285 | |
| 286 pgm_freearray(image, rows); | |
| 287 | |
| 288 exit(0); | |
| 289 } |