Mercurial > hg > wm
annotate Fotopoulos-dir/test-pv.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 | Fotopoulos/test-pv.c@71dd4b96221b |
| children |
| rev | line source |
|---|---|
| 0 | 1 /* Watermarking program - Fast Cosine Transform based */ |
| 2 /* Module : Testing */ | |
| 3 /* Author : Vassilis Fotopoulos */ | |
| 4 /* Date : 21/7/1999 */ | |
| 5 /* Developed at : ELLAB */ | |
| 6 /* Electronics Laboratory */ | |
| 7 /* Department of Physics */ | |
| 8 /* University of Patras - GREECE */ | |
| 9 /* Copyleft (c) 1999 */ | |
| 10 /* Testing Program */ | |
| 11 /*------------------------------------------------------*/ | |
| 12 /* pseudorandom noise generator's code is */ | |
| 13 /* taken from "Numerical Recipes in C" */ | |
| 14 /* FCT implementation from the 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:
23
diff
changeset
|
23 #include "netpbm/pgm.h" |
| 0 | 24 |
| 25 double cu[1024]; | |
| 26 double cv[1024]; | |
| 27 int height, width; | |
| 28 | |
| 29 void read_watermark(double *in, int N, int start_coeff, int wm_length, double wm_alpha) | |
| 30 { | |
| 31 int row, col, count; | |
| 32 long int elem, L, M, temp, seed, i; | |
| 33 double z; | |
| 34 M = start_coeff; | |
| 35 L = wm_length; | |
| 36 for (i = 1; i <= 1000; i++) { | |
| 37 seed = i; | |
| 38 z = 0.0; | |
| 39 count = 0; | |
| 40 elem = 0; | |
| 41 row = 2; | |
| 42 col = -1; | |
| 43 do { | |
| 44 do { | |
| 45 row--; | |
| 46 col++; | |
| 47 elem++; | |
| 48 if (col < N) { | |
| 49 if (elem > M) { | |
| 50 temp = row * N + col; | |
| 51 z += in[temp] * gasdev(&seed); | |
| 52 count++; | |
| 53 } | |
| 54 } | |
| 55 } while (row > 0); | |
| 56 row = 2 + col; | |
| 57 col = -1; | |
| 58 } while (count < L); | |
| 59 printf("%ld\t%f\n", i, z / L); | |
| 60 } | |
| 61 return ; | |
| 62 } | |
| 63 //-------------------------------------------------------- | |
| 64 void initialize_constants(void) | |
| 65 { | |
| 66 int i; | |
| 67 cu[0] = cv[0] = 0.7071068; | |
| 68 for (i = 1; i < 1024; i++) | |
| 69 cu[i] = cv[i] = 1.0; | |
| 70 } | |
| 71 | |
| 72 int main(int argc, char* argv[]) | |
| 73 { | |
| 74 FILE *in; | |
| 75 int **image_i; | |
| 76 double *image_f = NULL; | |
| 77 int N; | |
| 78 int c; | |
| 79 int coeff_start = 5000, wm_length = 10000; | |
| 80 double wm_alpha = 0.2; | |
| 81 | |
| 82 pgm_init(&argc, argv); wm_init2(); | |
| 83 | |
| 84 while ((c = getopt(argc, argv, "a:s:l:")) != EOF) { | |
| 85 switch (c) { | |
| 86 case 'a': | |
| 87 wm_alpha = atof(optarg); | |
| 88 break; | |
| 89 case 's': | |
| 90 coeff_start = atoi(optarg); | |
| 91 break; | |
| 92 case 'l': | |
| 93 wm_length = atoi(optarg); | |
| 94 break; | |
| 95 } | |
| 96 } | |
| 97 argc -= optind; | |
| 98 argv += optind; | |
| 99 in = stdin; | |
| 100 | |
| 101 open_image(in, &width, &height); | |
| 102 image_i = imatrix(height, width); | |
| 103 load_image(image_i, in, width, height); | |
| 104 | |
| 105 if (height == width) | |
| 106 N = height; | |
| 107 else { | |
| 108 fprintf(stderr, "Cannot Proccess non-square images!\n"); | |
| 109 exit( -11); | |
| 110 } | |
| 111 | |
| 112 initialize_constants(); | |
| 113 image_f = (double *)calloc(N * N, sizeof(double)); | |
| 114 if (image_f == NULL) { | |
| 115 printf("Unable to allocate the float array\n"); | |
| 116 exit(1); | |
| 117 } | |
| 118 | |
| 119 put_image_from_int_2_double(image_i, image_f, N); | |
| 120 fct2d(image_f, N, N); | |
| 121 read_watermark(image_f, N, coeff_start, wm_length, wm_alpha); | |
| 122 fclose(in); | |
| 123 freematrix(image_i, height); | |
| 124 free(image_f); | |
| 13 | 125 |
| 126 exit(EXIT_SUCCESS); | |
| 0 | 127 } |