Mercurial > hg > wm
annotate Meerwald/wm_frid2_e.c @ 22:d8551fb39a5e default tip
Added tag v0.6 for changeset 1c4ccd635a68
| author | Peter Meerwald-Stadler <pmeerw@pmeerw.net> |
|---|---|
| date | Sat, 28 Jan 2023 23:57:51 +0100 |
| parents | 4987db85cfae |
| children |
| rev | line source |
|---|---|
| 0 | 1 #include "wm.h" |
| 2 #include "dct.h" | |
| 3 #include "pgm.h" | |
| 4 #include "signature.h" | |
| 5 #include "frid2_common.h" | |
| 6 | |
| 7 char *progname; | |
| 8 | |
| 9 void usage(void) { | |
| 10 fprintf(stderr, "usage: %s [-a n] [-g n] [-n n] [-h] [-o file] [-v n] -s file file\n\n", progname); | |
| 11 fprintf(stderr, "\t-a n\t\talpha factor low freq. embedding strength\n"); | |
| 12 fprintf(stderr, "\t-g n\t\tgamma factor med freq. embedding strength\n"); | |
| 13 fprintf(stderr, "\t-h\t\tprint usage\n"); | |
| 14 fprintf(stderr, "\t-n n\t\tnormalisation factor (default 1024.0)\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-v n\t\tverbosity level\n"); | |
| 18 exit(0); | |
| 19 } | |
| 20 | |
| 21 int main(int argc, char *argv[]) { | |
| 22 | |
| 23 FILE *in = stdin; | |
| 24 FILE *out = stdout; | |
| 25 FILE *sig = NULL; | |
| 26 | |
| 27 char output_name[MAXPATHLEN] = "(stdout)"; | |
| 28 char input_name[MAXPATHLEN] = "(stdin)"; | |
| 29 char signature_name[MAXPATHLEN]; | |
| 30 | |
| 31 int c; | |
| 32 int row, col; | |
| 33 double normalization = 1024.0; | |
| 34 int seed, format; | |
| 35 | |
| 36 double alpha = 0.0; | |
| 37 double gamma = 0.0; | |
| 38 | |
| 39 gray **image; | |
| 40 double **coeffs; | |
| 41 | |
| 42 double mean, derivation; | |
| 43 double mult_factor; | |
| 44 | |
| 45 int rows, cols; | |
| 46 int verbose = 0; | |
| 47 gray maxval; | |
| 48 | |
| 49 progname = argv[0]; | |
| 50 | |
| 51 pgm_init(&argc, argv); wm_init(); | |
| 52 | |
| 53 while ((c = getopt(argc, argv, "a:g:n:h?o:s:v:")) != EOF) { | |
| 54 switch (c) { | |
| 55 case 'a': | |
| 56 alpha = atof(optarg); | |
| 57 if (alpha <= 0.0) { | |
| 58 fprintf(stderr, "%s: alpha factor %f out of range\n", progname, alpha); | |
| 59 exit(1); | |
| 60 } | |
| 61 break; | |
| 62 case 'g': | |
| 63 gamma = atof(optarg); | |
| 64 if (gamma <= 0.0) { | |
| 65 fprintf(stderr, "%s: gamma factor %f out of range\n", progname, alpha); | |
| 66 exit(1); | |
| 67 } | |
| 68 break; | |
| 69 case 'n': | |
| 70 normalization = atof(optarg); | |
| 71 if (normalization < 0) { | |
| 72 fprintf(stderr, "%s: normalisation factor %f out of range\n", progname, normalization); | |
| 73 exit(1); | |
| 74 } | |
| 75 break; | |
| 76 case 'h': | |
| 77 case '?': | |
| 78 usage(); | |
| 79 break; | |
| 80 case 'o': | |
| 81 if ((out = fopen(optarg, "wb")) == NULL) { | |
| 82 fprintf(stderr, "%s: unable to open output file %s\n", progname, optarg); | |
| 83 exit(1); | |
| 84 } | |
| 85 strcpy(output_name, optarg); | |
| 86 break; | |
| 87 case 's': | |
| 88 if ((sig = fopen(optarg, "r")) == NULL) { | |
| 89 fprintf(stderr, "%s: unable to open signature file %s\n", progname, optarg); | |
| 90 exit(1); | |
| 91 } | |
| 92 strcpy(signature_name, optarg); | |
| 93 break; | |
| 94 case 'v': | |
| 95 verbose = atoi(optarg); | |
| 96 if (verbose < 0) { | |
| 97 fprintf(stderr, "%s: verbosity level %d out of range\n", progname, verbose); | |
| 98 exit(1); | |
| 99 } | |
| 100 break; | |
| 101 } | |
| 102 } | |
| 103 | |
| 104 argc -= optind; | |
| 105 argv += optind; | |
| 106 | |
| 107 if (argc > 1) { | |
| 108 usage(); | |
| 109 exit(1); | |
| 110 } | |
| 111 | |
| 8 | 112 if (argc == 1 && *argv[0] != '-') { |
| 0 | 113 if ((in = fopen(argv[0], "rb")) == NULL) { |
| 114 fprintf(stderr, "%s: unable to open input file %s\n", progname, argv[0]); | |
| 115 exit(1); | |
| 116 } | |
| 117 else | |
| 118 strcpy(input_name, argv[0]); | |
| 8 | 119 } |
| 120 | |
| 0 | 121 if (sig) { |
| 122 char line[32]; | |
| 123 fgets(line, sizeof(line), sig); | |
| 124 if (strspn(line, "FR2SG") >= 5) { | |
| 125 fscanf(sig, "%d\n", &nbit_signature); | |
| 126 if (alpha == 0.0) | |
| 127 fscanf(sig, "%lf\n", &alpha); | |
| 128 else | |
|
16
4987db85cfae
fix another scanf() warning
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
8
diff
changeset
|
129 fscanf(sig, "%*f\n"); |
| 0 | 130 if (gamma == 0.0) |
| 131 fscanf(sig, "%lf\n", &gamma); | |
| 132 else | |
|
16
4987db85cfae
fix another scanf() warning
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
8
diff
changeset
|
133 fscanf(sig, "%*f\n"); |
| 0 | 134 |
| 135 fscanf(sig, "%d\n", &seed); | |
| 136 n_signature = NBITSTOBYTES(nbit_signature); | |
| 137 fread(signature, sizeof(char), n_signature, sig); | |
| 138 fscanf(sig, "\n"); | |
| 139 srandom(seed); | |
| 140 } | |
| 141 else { | |
| 142 fprintf(stderr, "%s: invalid signature file %s\n", progname, signature_name); | |
| 143 exit(1); | |
| 144 } | |
| 145 fclose(sig); | |
| 146 } | |
| 147 else { | |
| 148 fprintf(stderr, "%s: signature file not specified, use -s file option\n", progname); | |
| 149 exit(1); | |
| 150 } | |
| 151 | |
| 152 pgm_readpgminit(in, &cols, &rows, &maxval, &format); | |
| 153 | |
| 154 if (rows == cols) | |
| 155 init_dct_NxN(cols, rows); | |
| 156 else | |
| 157 init_dct_NxM(cols, rows); | |
| 158 | |
| 159 image = pgm_allocarray(cols, rows); | |
| 160 for (row = 0; row < rows; row++) | |
| 161 pgm_readpgmrow(in, image[row], cols, maxval, format); | |
| 162 fclose(in); | |
| 163 | |
| 164 // calculate mean value | |
| 165 mean = 0.0; | |
| 166 for (row = 0; row < rows; row++) | |
| 167 for (col = 0; col < cols; col++) | |
| 168 mean += image[row][col]; | |
| 169 | |
| 170 mean /= cols * rows; | |
| 171 | |
| 172 // calculate derivation | |
| 173 derivation = 0.0; | |
| 174 for (row = 0; row < rows; row++) | |
| 175 for (col = 0; col < cols; col++) | |
| 176 derivation += sqr(image[row][col] - mean); | |
| 177 | |
| 178 derivation = sqrt(derivation / (cols * rows - 1)); | |
| 179 mult_factor = normalization / (sqrt(cols * rows) * derivation); | |
| 180 | |
| 181 if (verbose > 5) | |
| 182 fprintf(stderr, "%s: mean %f, derivation %f, mult_factor %f\n", progname, mean, derivation, mult_factor); | |
| 183 | |
| 184 // normalize image | |
| 185 coeffs = alloc_coeffs(cols, rows); | |
| 186 for (row = 0; row < rows; row++) | |
| 187 for (col = 0; col < cols; col++) | |
| 188 coeffs[row][col] = (image[row][col] - mean) * mult_factor; | |
| 189 | |
| 190 if (cols == rows) | |
| 191 fdct_inplace_NxN(coeffs); | |
| 192 // else | |
| 193 // fdct_NxM(image, dcts); | |
| 194 | |
| 195 embed_low_freq(coeffs, cols, rows, alpha, verbose); | |
| 196 embed_med_freq(coeffs, cols, rows, gamma, seed, verbose); | |
| 197 | |
| 198 if (cols == rows) | |
| 199 idct_inplace_NxN(coeffs); | |
| 200 // else | |
| 201 // idct_NxM(dcts, image); | |
| 202 | |
| 203 for (row = 0; row < rows; row++) | |
| 204 for (col = 0; col < cols; col++) | |
| 205 image[row][col] = PIXELRANGE(coeffs[row][col] / mult_factor + mean + 0.5); | |
| 206 | |
| 207 free_coeffs(coeffs); | |
| 208 | |
| 209 pgm_writepgminit(out, cols, rows, maxval, 0); | |
| 210 for (row = 0; row < rows; row++) | |
| 211 pgm_writepgmrow(out, image[row], cols, maxval, 0); | |
| 212 | |
| 213 fclose(out); | |
| 214 | |
| 215 pgm_freearray(image, rows); | |
| 216 | |
| 217 exit(0); | |
| 218 } |