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annotate Fotopoulos-dir/test-sub.c @ 24:9f20bce6184e v0.7
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| author | Peter Meerwald-Stadler <pmeerw@pmeerw.net> |
|---|---|
| date | Fri, 20 Dec 2024 13:08:59 +0100 |
| parents | Fotopoulos/test-sub.c@cbecc570129d |
| children |
| rev | line source |
|---|---|
| 0 | 1 /* Watermarking program - Subband DCT Transform based */ |
| 2 /* Module : Testing */ | |
| 3 /* Author : Vassilis Fotopoulos */ | |
| 4 /* Date : 25/4/2000 */ | |
| 5 /* Revision : 6.0 */ | |
| 6 /* Developed at : ELLAB */ | |
| 7 /* Electronics Laboratory */ | |
| 8 /* Department of Physics */ | |
| 9 /* University of Patras - GREECE */ | |
| 10 /* Copyleft (c) 1999 */ | |
| 11 /*------------------------------------------------------*/ | |
| 12 /* pseudorandom noise generator's code is */ | |
| 13 /* taken from "Numerical Recipes in C" */ | |
| 14 /* FCT implementation from University of Bath */ | |
| 15 /*------------------------------------------------------*/ | |
| 16 #include <stdio.h> | |
| 17 #include <stdlib.h> | |
| 18 #include <string.h> | |
| 19 #include <math.h> | |
| 20 #include <float.h> | |
| 21 #include <getopt.h> | |
| 22 #include "common.h" | |
|
24
9f20bce6184e
move directories, support netpbm 11
Peter Meerwald-Stadler <pmeerw@pmeerw.net>
parents:
13
diff
changeset
|
23 #include "netpbm/pgm.h" |
| 0 | 24 |
| 25 //-------------------------------------------------------- | |
| 26 void add_hor_add_ver(double **in, int N, double **out); | |
| 27 void add_hor_sub_ver(double **in, int N, double **out); | |
| 28 void sub_hor_add_ver(double **in, int N, double **out); | |
| 29 void sub_hor_sub_ver(double **in, int N, double **out); | |
| 30 double detect_mark(double *i, int N, long key, long int L, long int M, double a); | |
| 31 | |
| 32 //-------------------------------------------------------- | |
| 33 double cu[1024]; | |
| 34 double cv[1024]; | |
| 35 int height, width; | |
| 36 //-------------------------------------------------------- | |
| 37 void add_hor_add_ver(double **in, int N, double **out) | |
| 38 { | |
| 39 double **temp; | |
| 40 int r, c; | |
| 41 temp = dmatrix(N, N); | |
| 42 for (r = 0; r < N; r++) | |
| 43 for (c = 0; c < N / 2; c++) | |
| 44 temp[r][c] = (in[r][2 * c] + in[r][2 * c + 1]) / 2; | |
| 45 for (c = 0; c < N / 2; c++) | |
| 46 for (r = 0; r < N / 2; r++) | |
| 47 out[r][c] = (temp[2 * r][c] + temp[2 * r + 1][c]) / 2; | |
| 48 freematrix_d(temp, N); | |
| 49 } | |
| 50 //-------------------------------------------------------- | |
| 51 void add_hor_sub_ver(double **in, int N, double **out) | |
| 52 { | |
| 53 double **temp; | |
| 54 int r, c; | |
| 55 temp = dmatrix(N, N); | |
| 56 for (r = 0; r < N; r++) | |
| 57 for (c = 0; c < N / 2; c++) | |
| 58 temp[r][c] = (in[r][2 * c] + in[r][2 * c + 1]) / 2; | |
| 59 for (c = 0; c < N / 2; c++) | |
| 60 for (r = 0; r < N / 2; r++) | |
| 61 out[r][c] = (temp[2 * r][c] - temp[2 * r + 1][c]) / 2; | |
| 62 freematrix_d(temp, N); | |
| 63 } | |
| 64 //-------------------------------------------------------- | |
| 65 void sub_hor_add_ver(double **in, int N, double **out) | |
| 66 { | |
| 67 double **temp; | |
| 68 int r, c; | |
| 69 temp = dmatrix(N, N); | |
| 70 for (r = 0; r < N; r++) | |
| 71 for (c = 0; c < N / 2; c++) | |
| 72 temp[r][c] = (in[r][2 * c] - in[r][2 * c + 1]) / 2; | |
| 73 for (c = 0; c < N / 2; c++) | |
| 74 for (r = 0; r < N / 2; r++) | |
| 75 out[r][c] = (temp[2 * r][c] + temp[2 * r + 1][c]) / 2; | |
| 76 freematrix_d(temp, N); | |
| 77 } | |
| 78 //-------------------------------------------------------- | |
| 79 void sub_hor_sub_ver(double **in, int N, double **out) | |
| 80 { | |
| 81 double **temp; | |
| 82 int r, c; | |
| 83 temp = dmatrix(N, N); | |
| 84 for (r = 0; r < N; r++) | |
| 85 for (c = 0; c < N / 2; c++) | |
| 86 temp[r][c] = (in[r][2 * c] - in[r][2 * c + 1]) / 2; | |
| 87 for (c = 0; c < N / 2; c++) | |
| 88 for (r = 0; r < N / 2; r++) | |
| 89 out[r][c] = (temp[2 * r][c] - temp[2 * r + 1][c]) / 2; | |
| 90 freematrix_d(temp, N); | |
| 91 } | |
| 92 | |
| 93 //--------------------------------------------------------- | |
| 94 double detect_mark(double *i, int N, long key, long int L, long int M, double a) | |
| 95 { | |
| 96 int row, col, count; | |
| 97 long int elem, temp, seed; | |
| 98 double z; | |
| 99 | |
| 100 | |
| 101 seed = key; | |
| 102 z = 0.0; | |
| 103 count = 0; | |
| 104 elem = 0; | |
| 105 row = 2; | |
| 106 col = -1; | |
| 107 do { | |
| 108 do { | |
| 109 row--; | |
| 110 col++; | |
| 111 elem++; | |
| 112 if (col < N) { | |
| 113 if (elem > M) { | |
| 114 temp = row * N + col; | |
| 115 z += i[temp] * gasdev(&seed); | |
| 116 count++; | |
| 117 } | |
| 118 } | |
| 119 } while (row > 0); | |
| 120 row = 2 + col; | |
| 121 col = -1; | |
| 122 } while (count < L); | |
| 123 | |
| 124 return (z / L); | |
| 125 } | |
| 126 | |
| 127 int main(int argc, char* argv[]) | |
| 128 { | |
| 129 double **i; | |
| 130 FILE *in; | |
| 131 int N; | |
| 132 long int key, M1, L1, M2, L2; | |
| 133 double **ll, **lh, **hl, **hh; | |
| 134 double *v1, *v2, *v3, *v99; | |
| 135 double m1, m2, m3, detect_value, m99; | |
| 136 int ** image_i; | |
| 137 int c; | |
| 138 int wm_length_1 = 10000, wm_length_ll = 10000, coeff_start_1 = 3000, coeff_start_ll = 3000; | |
| 139 double a_ll = 0.1, a_other = 0.2; | |
| 140 | |
| 141 pgm_init(&argc, argv); wm_init2(); | |
| 142 | |
| 143 while ((c = getopt(argc, argv, "a:b:t:m:s:l:")) != EOF) { | |
| 144 switch (c) { | |
| 145 case 'a': | |
| 146 a_ll = atof(optarg); | |
| 147 break; | |
| 148 case 'b': | |
| 149 a_other = atof(optarg); | |
| 150 break; | |
| 151 case 't': | |
| 152 coeff_start_1 = atoi(optarg); | |
| 153 break; | |
| 154 case 'm': | |
| 155 wm_length_1 = atoi(optarg); | |
| 156 break; | |
| 157 case 's': | |
| 158 coeff_start_ll = atoi(optarg); | |
| 159 break; | |
| 160 case 'l': | |
| 161 wm_length_ll = atoi(optarg); | |
| 162 break; | |
| 163 } | |
| 164 } | |
| 165 argc -= optind; | |
| 166 argv += optind; | |
| 167 | |
| 168 in = stdin; | |
| 169 open_image(in, &width, &height); | |
| 170 image_i = imatrix(height, width); | |
| 171 load_image(image_i, in, width, height); | |
| 172 | |
| 173 if (height == width) | |
| 174 N = height; | |
| 175 else { | |
| 176 fprintf(stderr, "Cannot Proccess non-square images!\n"); | |
| 177 exit( -11); | |
| 178 } | |
| 179 // starting coeff. for 1st level decomp. | |
| 180 M1 = coeff_start_1; | |
| 181 // number of coeffs to alter | |
| 182 L1 = wm_length_1; | |
| 183 // alpha parameter | |
| 184 | |
| 185 // now the LL band | |
| 186 M2 = coeff_start_ll; | |
| 187 L2 = wm_length_ll; | |
| 188 | |
| 189 | |
| 190 i = dmatrix(N, N); | |
| 191 ll = dmatrix(N / 2, N / 2); | |
| 192 lh = dmatrix(N / 2, N / 2); | |
| 193 hl = dmatrix(N / 2, N / 2); | |
| 194 hh = dmatrix(N / 2, N / 2); | |
| 195 v1 = dvector(N * N / 4); | |
| 196 v2 = dvector(N * N / 4); | |
| 197 v3 = dvector(N * N / 4); | |
| 198 v99 = dvector(N * N / 4); | |
| 199 | |
| 200 matrix_i2d(image_i, i, N); | |
| 201 | |
| 202 //---------------------1o decomposition------------------- | |
| 203 add_hor_add_ver(i, N, ll); | |
| 204 add_hor_sub_ver(i, N, lh); | |
| 205 sub_hor_add_ver(i, N, hl); | |
| 206 sub_hor_sub_ver(i, N, hh); | |
| 207 //---------------------Detect Watermark from all bands---- | |
| 208 put_matrix_2_vector(lh, v1, N / 2); | |
| 209 put_matrix_2_vector(hl, v2, N / 2); | |
| 210 put_matrix_2_vector(hh, v3, N / 2); | |
| 211 put_matrix_2_vector(ll, v99, N / 2); | |
| 212 fct2d(v1, N / 2, N / 2); | |
| 213 fct2d(v2, N / 2, N / 2); | |
| 214 fct2d(v3, N / 2, N / 2); | |
| 215 fct2d(v99, N / 2, N / 2); | |
| 216 for (key = 1; key <= 1000; key++) { | |
| 217 m1 = detect_mark(v1, N / 2, key, L1, M1, a_other); | |
| 218 m2 = detect_mark(v2, N / 2, key, L1, M1, a_other); | |
| 219 m3 = detect_mark(v3, N / 2, key, L1, M1, a_other); | |
| 220 m99 = detect_mark(v99, N / 2, key, L2, M2, a_ll); | |
| 221 detect_value = (m1 + m2 + m3 + m99) / 4; | |
| 222 printf("%ld\t%f\t%f\t%f\t%f\t%f\n", key, m1, m2, m3, m99, detect_value); | |
| 223 } | |
| 224 //-------------------------------------------------------- | |
| 225 free(v1); | |
| 226 free(v2); | |
| 227 free(v3); | |
| 228 free(v99); | |
| 229 freematrix_d(ll, N / 2); | |
| 230 freematrix_d(hl, N / 2); | |
| 231 freematrix_d(lh, N / 2); | |
| 232 freematrix_d(hh, N / 2); | |
| 233 fclose(in); | |
| 13 | 234 |
| 235 exit(EXIT_SUCCESS); | |
| 0 | 236 } |
| 237 | |
| 238 | |
| 239 | |
| 240 |