Mercurial > hg > wm
annotate Meerwald-dir/wm_zhu_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_zhu_e.c@4987db85cfae |
| 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 "sort.h" |
| 5 | |
| 6 char *progname; | |
| 7 | |
| 8 void usage(void) { | |
| 9 fprintf(stderr, "usage: %s [-a n] [-e n] [-f n] [-F n] [-h] [-l n] [-o file] [-v n] -s file file\n\n", progname); | |
| 10 fprintf(stderr, "\t-a n\t\talpha factor/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-h\t\tprint usage\n"); | |
| 15 fprintf(stderr, "\t-l n\t\tdecomposition level\n"); | |
| 16 fprintf(stderr, "\t-o file\t\toutput (watermarked) file\n"); | |
| 17 fprintf(stderr, "\t-s file\t\tsignature to embed in input image\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 char output_name[MAXPATHLEN] = "(stdout)"; | |
| 29 char input_name[MAXPATHLEN] = "(stdin)"; | |
| 30 char signature_name[MAXPATHLEN]; | |
| 31 | |
| 32 int i, c, w; | |
| 8 | 33 int row; |
| 0 | 34 |
| 35 int n; | |
| 36 | |
| 37 double alpha = 0.0; | |
| 38 int level = 0; | |
| 39 | |
| 40 int filter = 0; | |
| 41 int method = -1; | |
| 42 int levels; | |
| 43 char filter_name[MAXPATHLEN] = ""; | |
| 44 | |
| 45 int verbose = 0; | |
| 46 | |
| 47 gray **image; | |
| 48 Image_tree p, dwts; | |
| 49 | |
| 50 gray maxval; | |
| 8 | 51 int rows, cols, format; |
| 0 | 52 |
| 53 double *watermark; | |
| 54 | |
| 55 progname = argv[0]; | |
| 56 | |
| 57 pgm_init(&argc, argv); wm_init(); | |
| 58 | |
| 59 while ((c = getopt(argc, argv, "a:e:f:F:h?o:l:s:v:")) != EOF) { | |
| 60 switch (c) { | |
| 61 case 'a': | |
| 62 alpha = atof(optarg); | |
| 63 if (alpha <= 0.0) { | |
| 64 fprintf(stderr, "%s: alpha factor %f out of range\n", progname, alpha); | |
| 65 exit(1); | |
| 66 } | |
| 67 break; | |
| 68 case 'l': | |
| 69 level = atoi(optarg); | |
| 70 if (level <= 0) { | |
| 71 fprintf(stderr, "%s: decomposition level %d out of range\n", progname, level); | |
| 72 exit(1); | |
| 73 } | |
| 74 break; | |
| 75 case 'e': | |
| 76 method = atoi(optarg); | |
| 77 if (method < 0) { | |
| 78 fprintf(stderr, "%s: wavelet filtering method %d out of range\n", progname, method); | |
| 79 exit(1); | |
| 80 } | |
| 81 break; | |
| 82 case 'f': | |
| 83 filter = atoi(optarg); | |
| 84 if (filter <= 0) { | |
| 85 fprintf(stderr, "%s: filter number %d out of range\n", progname, filter); | |
| 86 exit(1); | |
| 87 } | |
| 88 break; | |
| 89 case 'F': | |
| 90 strcpy(filter_name, optarg); | |
| 91 break; | |
| 92 case 'h': | |
| 93 case '?': | |
| 94 usage(); | |
| 95 break; | |
| 96 case 'o': | |
| 97 if ((out = fopen(optarg, "wb")) == NULL) { | |
| 98 fprintf(stderr, "%s: unable to open output file %s\n", progname, optarg); | |
| 99 exit(1); | |
| 100 } | |
| 101 strcpy(output_name, optarg); | |
| 102 break; | |
| 103 case 's': | |
| 104 if ((sig = fopen(optarg, "r")) == NULL) { | |
| 105 fprintf(stderr, "%s: unable to open signature file %s\n", progname, optarg); | |
| 106 exit(1); | |
| 107 } | |
| 108 strcpy(signature_name, optarg); | |
| 109 break; | |
| 110 case 'v': | |
| 111 verbose = atoi(optarg); | |
| 112 if (verbose < 0) { | |
| 113 fprintf(stderr, "%s: verbosity level %d out of range\n", progname, verbose); | |
| 114 exit(1); | |
| 115 } | |
| 116 break; | |
| 117 } | |
| 118 } | |
| 119 | |
| 120 argc -= optind; | |
| 121 argv += optind; | |
| 122 | |
| 123 if (argc > 1) { | |
| 124 usage(); | |
| 125 exit(1); | |
| 126 } | |
| 127 | |
| 8 | 128 if (argc == 1 && *argv[0] != '-') { |
| 0 | 129 if ((in = fopen(argv[0], "rb")) == NULL) { |
| 130 fprintf(stderr, "%s: unable to open input file %s\n", progname, argv[0]); | |
| 131 exit(1); | |
| 132 } | |
| 133 else | |
| 134 strcpy(input_name, argv[0]); | |
| 8 | 135 } |
| 136 | |
| 0 | 137 if (sig) { |
| 138 char line[32]; | |
| 139 fgets(line, sizeof(line), sig); | |
| 140 if (strspn(line, "ZHSG") >= 4) { | |
| 141 fscanf(sig, "%d\n", &n); | |
| 142 if (alpha == 0.0) | |
| 143 fscanf(sig, "%lf\n", &alpha); | |
| 144 else | |
|
16
4987db85cfae
fix another scanf() warning
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
15
diff
changeset
|
145 fscanf(sig, "%*f\n"); |
| 0 | 146 if (level == 0) |
| 147 fscanf(sig, "%d\n", &level); | |
| 148 else | |
| 149 fscanf(sig, "%*d\n"); | |
| 150 if (method < 0) | |
| 151 fscanf(sig, "%d\n", &method); | |
| 152 else | |
| 153 fscanf(sig, "%*d\n"); | |
| 154 if (filter == 0) | |
| 155 fscanf(sig, "%d\n", &filter); | |
| 156 else | |
| 157 fscanf(sig, "%*d\n"); | |
| 158 if (!strcmp(filter_name, "")) | |
| 15 | 159 fscanf(sig, "%[^\n\r]\n", filter_name); |
| 0 | 160 else |
| 161 fscanf(sig, "%*[^\n\r]\n"); | |
| 162 } | |
| 163 else { | |
| 164 fprintf(stderr, "%s: invalid signature file %s\n", progname, signature_name); | |
| 165 exit(1); | |
| 166 } | |
| 167 } | |
| 168 else { | |
| 169 fprintf(stderr, "%s: signature file not specified, use -s file option\n", progname); | |
| 170 exit(1); | |
| 171 } | |
| 172 | |
| 173 watermark = malloc(n * sizeof(double)); | |
| 174 for (i = 0; i < n; i++) | |
| 175 fscanf(sig, "%lf\n", &watermark[i]); | |
| 176 fclose(sig); | |
| 177 | |
| 178 pgm_readpgminit(in, &cols, &rows, &maxval, &format); | |
| 179 image = pgm_allocarray(cols, rows); | |
| 180 for (row = 0; row < rows; row++) | |
| 181 pgm_readpgmrow(in, image[row], cols, maxval, format); | |
| 182 fclose(in); | |
| 183 | |
| 184 // complete decomposition | |
| 185 levels = find_deepest_level(cols, rows) - 1; | |
| 186 if (level > levels) { | |
| 187 fprintf(stderr, "%s: decomposition level %d not possible (max. %d), image size is %d x %d\n", progname, level, levels, cols, rows); | |
| 188 exit(1); | |
| 189 } | |
| 190 | |
| 191 // wavelet transform | |
| 192 init_dwt(cols, rows, filter_name, filter, level, method); | |
| 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 p = dwts; | |
| 203 while (p->coarse) { | |
| 204 double *collected_coeffs, *largest; | |
| 205 int subband_size = p->horizontal->image->size; | |
| 206 int maxselect = MIN(3 * subband_size, n + 1); | |
| 207 double threshold; | |
| 208 | |
| 209 // allocate memory for coefficient vector | |
| 210 collected_coeffs = malloc(3 * subband_size * sizeof(double)); | |
| 211 if (!collected_coeffs) { | |
| 212 fprintf(stderr, "%s: malloc() failed\n", progname); | |
| 213 exit(1); | |
| 214 } | |
| 215 | |
| 216 // collect coefficients from all subbands of one level into one vector | |
| 217 for (i = 0; i < subband_size; i++) { | |
| 218 collected_coeffs[3 * i + 0] = p->horizontal->image->data[i]; | |
| 219 collected_coeffs[3 * i + 1] = p->vertical->image->data[i]; | |
| 220 collected_coeffs[3 * i + 2] = p->diagonal->image->data[i]; | |
| 221 } | |
| 222 | |
| 223 // allocate memory for largest coefficients | |
| 224 largest = malloc(maxselect * sizeof(double)); | |
| 225 if (!largest) { | |
| 226 fprintf(stderr, "%s: malloc() failed\n", progname); | |
| 227 exit(1); | |
| 228 } | |
| 229 | |
| 230 // select largest coefficients (involves sorting) | |
| 231 select_largest_coeffs(collected_coeffs, 3 * subband_size, maxselect, largest); | |
| 232 // threshold is the smallest of the largest coefficients | |
| 233 threshold = largest[0]; | |
| 234 free(largest); | |
| 235 free(collected_coeffs); | |
| 236 | |
| 237 w = 0; | |
| 238 for (i = 0; i < subband_size && w < n; i++) { | |
| 239 if (p->horizontal->image->data[i] > threshold) | |
| 240 p->horizontal->image->data[i] *= (1.0 + alpha * watermark[w++]); | |
| 241 if (p->vertical->image->data[i] > threshold) | |
| 242 p->vertical->image->data[i] *= (1.0 + alpha * watermark[w++]); | |
| 243 if (p->diagonal->image->data[i] > threshold) | |
| 244 p->diagonal->image->data[i] *= (1.0 + alpha * watermark[w++]); | |
| 245 } | |
| 246 | |
| 247 p = p->coarse; | |
| 248 } | |
| 249 | |
| 250 free(watermark); | |
| 251 idwt(dwts, image); | |
| 252 | |
| 253 pgm_writepgminit(out, cols, rows, maxval, 0); | |
| 254 for (row = 0; row < rows; row++) | |
| 255 pgm_writepgmrow(out, image[row], cols, maxval, 0); | |
| 256 fclose(out); | |
| 257 | |
| 258 pgm_freearray(image, rows); | |
| 259 | |
| 260 exit(0); | |
| 261 } |