Mercurial > hg > wm
annotate Meerwald-dir/wm_dugad_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_dugad_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 |
| 5 char *progname; | |
| 6 | |
| 7 void usage(void) { | |
| 8 fprintf(stderr, "usage: %s [-a n] [-e n] [-f n] [-F file] [-h] [-l n] [-o file] [-t n] [-v n] -s file file\n\n", progname); | |
| 9 fprintf(stderr, "\t-a n\t\talpha factor/embedding strength\n"); | |
| 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\tdecomposition levels\n"); | |
| 15 fprintf(stderr, "\t-o file\t\toutput (watermarked) file\n"); | |
| 16 fprintf(stderr, "\t-s file\t\tsignature to embed in input image\n"); | |
| 17 fprintf(stderr, "\t-t n\t\tcasting threshold\n"); | |
| 18 fprintf(stderr, "\t-v n\t\tverbosity level\n"); | |
| 19 exit(0); | |
| 20 } | |
| 21 | |
| 22 // actual watermarking procedure: embeds a watermark of n normally | |
| 23 // distributed values into a coefficients > threshold t1 of a subband | |
| 24 void wm_subband(Image s, double *w, int n, double a, double t1) { | |
| 25 int i; | |
| 26 | |
| 27 for (i = 0; i < s->width * s->height; i++) | |
| 28 if (fabs(s->data[i]) > t1) | |
| 29 s->data[i] += (a * fabs(s->data[i]) * w[i % n]); | |
| 30 } | |
| 31 | |
| 32 int main(int argc, char *argv[]) { | |
| 33 | |
| 34 FILE *in = stdin; | |
| 35 FILE *out = stdout; | |
| 36 FILE *sig = NULL; | |
| 37 | |
| 38 char output_name[MAXPATHLEN] = "(stdout)"; | |
| 39 char input_name[MAXPATHLEN] = "(stdin)"; | |
| 40 char signature_name[MAXPATHLEN]; | |
| 41 | |
| 42 int i, c; | |
| 8 | 43 int row; |
| 0 | 44 |
| 45 int n; | |
| 46 | |
| 47 double alpha = 0.0; | |
| 48 double t1 = 0.0; | |
| 49 | |
| 3 | 50 int level = 0; |
| 0 | 51 int filter = 0; |
| 52 int method = -1; | |
| 53 char filter_name[MAXPATHLEN] = ""; | |
| 54 | |
| 55 int verbose = 0; | |
| 56 | |
| 57 gray **image; | |
| 58 Image_tree dwts, s; | |
| 59 | |
| 60 gray maxval; | |
| 8 | 61 int rows, cols, format; |
| 0 | 62 |
| 63 double *watermark; | |
| 64 | |
| 65 progname = argv[0]; | |
| 66 | |
| 67 pgm_init(&argc, argv); wm_init(); | |
| 68 | |
| 69 while ((c = getopt(argc, argv, "a:e:f:F:h?l:o:s:t:v:")) != EOF) { | |
| 70 switch (c) { | |
| 71 case 'a': | |
| 72 alpha = atof(optarg); | |
| 73 if (alpha <= 0.0) { | |
| 74 fprintf(stderr, "%s: alpha factor %f out of range\n", progname, alpha); | |
| 75 exit(1); | |
| 76 } | |
| 77 break; | |
| 78 case 'e': | |
| 79 method = atoi(optarg); | |
| 80 if (method < 0) { | |
| 81 fprintf(stderr, "%s: wavelet filtering method %d out of range\n", progname, method); | |
| 82 exit(1); | |
| 83 } | |
| 84 break; | |
| 85 case 'f': | |
| 86 filter = atoi(optarg); | |
| 87 if (filter <= 0) { | |
| 88 fprintf(stderr, "%s: filter number %d out of range\n", progname, filter); | |
| 89 exit(1); | |
| 90 } | |
| 91 break; | |
| 92 case 'F': | |
| 93 strcpy(filter_name, optarg); | |
| 94 break; | |
| 95 case 'h': | |
| 96 case '?': | |
| 97 usage(); | |
| 98 break; | |
| 99 case 'l': | |
| 3 | 100 level = atoi(optarg); |
| 101 if (level <= 0) { | |
| 8 | 102 fprintf(stderr, "%s: decomposition level %d out of range\n", progname, level); |
| 0 | 103 exit(1); |
| 104 } | |
| 105 break; | |
| 106 case 'o': | |
| 107 if ((out = fopen(optarg, "wb")) == NULL) { | |
| 108 fprintf(stderr, "%s: unable to open output file %s\n", progname, optarg); | |
| 109 exit(1); | |
| 110 } | |
| 111 strcpy(output_name, optarg); | |
| 112 break; | |
| 113 case 's': | |
| 114 if ((sig = fopen(optarg, "r")) == NULL) { | |
| 115 fprintf(stderr, "%s: unable to open signature file %s\n", progname, optarg); | |
| 116 exit(1); | |
| 117 } | |
| 118 strcpy(signature_name, optarg); | |
| 119 break; | |
| 120 case 't': | |
| 121 t1 = atof(optarg); | |
| 122 if (t1 <= 0.0) { | |
| 123 fprintf(stderr, "%s: casting threshold %f out of range\n", progname, t1); | |
| 124 exit(1); | |
| 125 } | |
| 126 break; | |
| 127 case 'v': | |
| 128 verbose = atoi(optarg); | |
| 129 if (verbose < 0) { | |
| 130 fprintf(stderr, "%s: verbosity level %d out of range\n", progname, verbose); | |
| 131 exit(1); | |
| 132 } | |
| 133 break; | |
| 134 } | |
| 135 } | |
| 136 | |
| 137 argc -= optind; | |
| 138 argv += optind; | |
| 139 | |
| 140 if (argc > 1) { | |
| 141 usage(); | |
| 142 exit(1); | |
| 143 } | |
| 144 | |
| 8 | 145 if (argc == 1 && *argv[0] != '-') { |
| 0 | 146 if ((in = fopen(argv[0], "rb")) == NULL) { |
| 147 fprintf(stderr, "%s: unable to open input file %s\n", progname, argv[0]); | |
| 148 exit(1); | |
| 149 } | |
| 150 else | |
| 151 strcpy(input_name, argv[0]); | |
| 8 | 152 } |
| 153 | |
| 0 | 154 if (sig) { |
| 155 char line[32]; | |
| 156 fgets(line, sizeof(line), sig); | |
| 157 if (strspn(line, "DGSG") >= 4) { | |
| 158 fscanf(sig, "%d\n", &n); | |
| 3 | 159 if (level == 0) |
| 160 fscanf(sig, "%d\n", &level); | |
| 0 | 161 else |
| 162 fscanf(sig, "%*d\n"); | |
| 163 if (alpha == 0.0) | |
| 164 fscanf(sig, "%lf\n", &alpha); | |
| 165 else | |
|
16
4987db85cfae
fix another scanf() warning
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
15
diff
changeset
|
166 fscanf(sig, "%*f\n"); |
| 0 | 167 if (t1 == 0.0) |
| 168 fscanf(sig, "%lf\n", &t1); | |
| 169 else | |
|
16
4987db85cfae
fix another scanf() warning
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
15
diff
changeset
|
170 fscanf(sig, "%*f\n"); |
|
4987db85cfae
fix another scanf() warning
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
15
diff
changeset
|
171 fscanf(sig, "%*f\n"); |
| 0 | 172 if (method < 0) |
| 173 fscanf(sig, "%d\n", &method); | |
| 174 else | |
| 175 fscanf(sig, "%*d\n"); | |
| 176 if (filter == 0) | |
| 177 fscanf(sig, "%d\n", &filter); | |
| 178 else | |
| 179 fscanf(sig, "%*d\n"); | |
| 180 if (!strcmp(filter_name, "")) | |
| 15 | 181 fscanf(sig, "%[^\n\r]\n", filter_name); |
| 0 | 182 else |
| 183 fscanf(sig, "%*[^\n\r]\n"); | |
| 184 } | |
| 185 else { | |
| 186 fprintf(stderr, "%s: invalid signature file %s\n", progname, signature_name); | |
| 187 exit(1); | |
| 188 } | |
| 189 } | |
| 190 else { | |
| 191 fprintf(stderr, "%s: signature file not specified, use -s file option\n", progname); | |
| 192 exit(1); | |
| 193 } | |
| 194 | |
| 195 watermark = malloc(n * sizeof(double)); | |
| 196 for (i = 0; i < n; i++) | |
| 197 fscanf(sig, "%lf\n", &watermark[i]); | |
| 198 fclose(sig); | |
| 199 | |
| 200 pgm_readpgminit(in, &cols, &rows, &maxval, &format); | |
| 201 | |
| 202 image = pgm_allocarray(cols, rows); | |
| 203 | |
| 204 for (row = 0; row < rows; row++) | |
| 205 pgm_readpgmrow(in, image[row], cols, maxval, format); | |
| 206 | |
| 207 fclose(in); | |
| 208 | |
| 209 // wavelet transform | |
| 3 | 210 init_dwt(cols, rows, filter_name, filter, level, method); |
| 0 | 211 #ifdef POLLEN_STUFF |
| 3 | 212 #include "pollen_stuff.c" |
| 0 | 213 #endif |
| 214 #ifdef PARAM_STUFF | |
| 3 | 215 #include "param_stuff.c" |
| 0 | 216 #endif |
| 217 | |
| 218 dwts = fdwt(image); | |
| 219 | |
| 220 // embed watermark in all subbands of a decomposition level | |
| 221 for (i = 0, s = dwts; i < 3; i++, s = s->coarse) { | |
| 222 wm_subband(s->horizontal->image, watermark, n, alpha, t1); | |
| 223 wm_subband(s->vertical->image, watermark, n, alpha, t1); | |
| 224 wm_subband(s->diagonal->image, watermark, n, alpha, t1); | |
| 225 } | |
| 226 | |
| 227 free(watermark); | |
| 228 | |
| 229 idwt(dwts, image); | |
| 230 | |
| 231 pgm_writepgminit(out, cols, rows, maxval, 0); | |
| 232 | |
| 233 for (row = 0; row < rows; row++) | |
| 234 pgm_writepgmrow(out, image[row], cols, maxval, 0); | |
| 235 | |
| 236 fclose(out); | |
| 237 | |
| 238 pgm_freearray(image, rows); | |
| 239 | |
| 240 exit(0); | |
| 241 } |