Mercurial > hg > wm
comparison Fotopoulos-dir/test-hart.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-hart.c@71dd4b96221b |
| children |
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| 23:71dd4b96221b | 24:9f20bce6184e |
|---|---|
| 1 /* Watermarking program - Hartley Transform based */ | |
| 2 /* Module : Testing */ | |
| 3 /* Author : Vassilis Fotopoulos */ | |
| 4 /* Date : 26/7/1999 */ | |
| 5 /* Developed at : ELLAB */ | |
| 6 /* Electronics Laboratory */ | |
| 7 /* Department of Physics */ | |
| 8 /* University of Patras - GREECE */ | |
| 9 /* Copyleft (c) 1999 */ | |
| 10 /*------------------------------------------------------*/ | |
| 11 /* pseudorandom noise generator's code is */ | |
| 12 /* taken from "Numerical Recipes in C" */ | |
| 13 /*------------------------------------------------------*/ | |
| 14 #include <stdio.h> | |
| 15 #include <stdlib.h> | |
| 16 #include <string.h> | |
| 17 #include <math.h> | |
| 18 #include <float.h> | |
| 19 #include <getopt.h> | |
| 20 #include "common.h" | |
| 21 #include "netpbm/pgm.h" | |
| 22 | |
| 23 int height, width; | |
| 24 | |
| 25 void read_watermark(double **in, int N, int coeff_start, int wm_length, double wm_alpha) | |
| 26 { | |
| 27 int row, col, count; | |
| 28 long int elem, L, M, seed, i; | |
| 29 double z; | |
| 30 M = coeff_start; | |
| 31 L = wm_length; | |
| 32 for (i = 1; i <= 1000; i++) { | |
| 33 seed = i; | |
| 34 z = 0.0; | |
| 35 count = 0; | |
| 36 elem = 0; | |
| 37 | |
| 38 for (row = 0; row < N; row++) | |
| 39 for (col = 0; col < N; col++) { | |
| 40 elem++; | |
| 41 if (elem > M && count < L) { | |
| 42 z += in[row][col] * gasdev(&seed); | |
| 43 count++; | |
| 44 } | |
| 45 } | |
| 46 | |
| 47 printf("%ld\t%f\n", i, z / L); | |
| 48 } | |
| 49 return ; | |
| 50 } | |
| 51 | |
| 52 int main(int argc, char* argv[]) | |
| 53 { | |
| 54 FILE *in; | |
| 55 int **image; | |
| 56 double **image_i; | |
| 57 double **image_d; | |
| 58 int c; | |
| 59 int N; | |
| 60 int coeff_start = 5000, wm_length = 10000; | |
| 61 double wm_alpha = 0.2; | |
| 62 int width, height; | |
| 63 | |
| 64 pgm_init(&argc, argv); wm_init2(); | |
| 65 | |
| 66 while ((c = getopt(argc, argv, "a:s:l:")) != EOF) { | |
| 67 switch (c) { | |
| 68 case 'a': | |
| 69 wm_alpha = atof(optarg); | |
| 70 break; | |
| 71 case 's': | |
| 72 coeff_start = atoi(optarg); | |
| 73 break; | |
| 74 case 'l': | |
| 75 wm_length = atoi(optarg); | |
| 76 break; | |
| 77 } | |
| 78 } | |
| 79 argc -= optind; | |
| 80 argv += optind; | |
| 81 | |
| 82 in = stdin; | |
| 83 | |
| 84 open_image(in, &width, &height); | |
| 85 image = imatrix(height, width); | |
| 86 load_image(image, in, width, height); | |
| 87 | |
| 88 if (height == width) | |
| 89 N = height; | |
| 90 else { | |
| 91 fprintf(stderr, "Cannot Proccess non-square images!\n"); | |
| 92 exit( -11); | |
| 93 } | |
| 94 | |
| 95 image_i = dmatrix(height, width); | |
| 96 image_d = dmatrix(height, width); | |
| 97 if (image_d == NULL) { | |
| 98 fprintf(stderr, "Unable to allocate the double array\n"); | |
| 99 exit(1); | |
| 100 } | |
| 101 matrix_i2d(image, image_i, N); | |
| 102 hartley(image_i, image_d, N); | |
| 103 read_watermark(image_d, N, coeff_start, wm_length, wm_alpha); | |
| 104 | |
| 105 freematrix_d(image_i, height); | |
| 106 freematrix_d(image_d, height); | |
| 107 fclose(in); | |
| 108 | |
| 109 exit(EXIT_SUCCESS); | |
| 110 } |