--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Fotopoulos-dir/test-sub.c	Fri Dec 20 13:08:59 2024 +0100
@@ -0,0 +1,240 @@
+/* Watermarking program - Subband DCT Transform based	*/
+/* Module	: Testing				*/
+/* Author	: Vassilis Fotopoulos			*/
+/* Date		: 25/4/2000				*/
+/* Revision	: 6.0					*/
+/* Developed at	: ELLAB                  		*/
+/*                Electronics Laboratory           	*/
+/*                Department of Physics             	*/
+/*                University of Patras - GREECE      	*/
+/*		  Copyleft (c) 1999	    		*/
+/*------------------------------------------------------*/
+/*	pseudorandom noise generator's code is		*/
+/*	taken from "Numerical Recipes in C"		*/
+/*	FCT implementation from University of Bath	*/
+/*------------------------------------------------------*/
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <math.h>
+#include <float.h>
+#include <getopt.h>
+#include "common.h"
+#include "netpbm/pgm.h"
+
+//--------------------------------------------------------
+void add_hor_add_ver(double **in, int N, double **out);
+void add_hor_sub_ver(double **in, int N, double **out);
+void sub_hor_add_ver(double **in, int N, double **out);
+void sub_hor_sub_ver(double **in, int N, double **out);
+double detect_mark(double *i, int N, long key, long int L, long int M, double a);
+
+//--------------------------------------------------------
+double cu[1024];
+double cv[1024];
+int height, width;
+//--------------------------------------------------------
+void add_hor_add_ver(double **in, int N, double **out)
+{
+  double **temp;
+  int r, c;
+  temp = dmatrix(N, N);
+  for (r = 0; r < N; r++)
+    for (c = 0; c < N / 2; c++)
+      temp[r][c] = (in[r][2 * c] + in[r][2 * c + 1]) / 2;
+  for (c = 0; c < N / 2; c++)
+    for (r = 0; r < N / 2; r++)
+      out[r][c] = (temp[2 * r][c] + temp[2 * r + 1][c]) / 2;
+  freematrix_d(temp, N);
+}
+//--------------------------------------------------------
+void add_hor_sub_ver(double **in, int N, double **out)
+{
+  double **temp;
+  int r, c;
+  temp = dmatrix(N, N);
+  for (r = 0; r < N; r++)
+    for (c = 0; c < N / 2; c++)
+      temp[r][c] = (in[r][2 * c] + in[r][2 * c + 1]) / 2;
+  for (c = 0; c < N / 2; c++)
+    for (r = 0; r < N / 2; r++)
+      out[r][c] = (temp[2 * r][c] - temp[2 * r + 1][c]) / 2;
+  freematrix_d(temp, N);
+}
+//--------------------------------------------------------
+void sub_hor_add_ver(double **in, int N, double **out)
+{
+  double **temp;
+  int r, c;
+  temp = dmatrix(N, N);
+  for (r = 0; r < N; r++)
+    for (c = 0; c < N / 2; c++)
+      temp[r][c] = (in[r][2 * c] - in[r][2 * c + 1]) / 2;
+  for (c = 0; c < N / 2; c++)
+    for (r = 0; r < N / 2; r++)
+      out[r][c] = (temp[2 * r][c] + temp[2 * r + 1][c]) / 2;
+  freematrix_d(temp, N);
+}
+//--------------------------------------------------------
+void sub_hor_sub_ver(double **in, int N, double **out)
+{
+  double **temp;
+  int r, c;
+  temp = dmatrix(N, N);
+  for (r = 0; r < N; r++)
+    for (c = 0; c < N / 2; c++)
+      temp[r][c] = (in[r][2 * c] - in[r][2 * c + 1]) / 2;
+  for (c = 0; c < N / 2; c++)
+    for (r = 0; r < N / 2; r++)
+      out[r][c] = (temp[2 * r][c] - temp[2 * r + 1][c]) / 2;
+  freematrix_d(temp, N);
+}
+
+//---------------------------------------------------------
+double detect_mark(double *i, int N, long key, long int L, long int M, double a)
+{
+  int row, col, count;
+  long int elem, temp, seed;
+  double z;
+
+
+  seed = key;
+  z = 0.0;
+  count = 0;
+  elem = 0;
+  row = 2;
+  col = -1;
+  do {
+    do {
+      row--;
+      col++;
+      elem++;
+      if (col < N) {
+        if (elem > M) {
+          temp = row * N + col;
+          z += i[temp] * gasdev(&seed);
+          count++;
+        }
+      }
+    } while (row > 0);
+    row = 2 + col;
+    col = -1;
+  } while (count < L);
+
+  return (z / L);
+}
+
+int main(int argc, char* argv[])
+{
+  double **i;
+  FILE *in;
+  int N;
+  long int key, M1, L1, M2, L2;
+  double **ll, **lh, **hl, **hh;
+  double *v1, *v2, *v3, *v99;
+  double m1, m2, m3, detect_value, m99;
+  int ** image_i;
+  int c;
+  int wm_length_1 = 10000, wm_length_ll = 10000, coeff_start_1 = 3000, coeff_start_ll = 3000;
+  double a_ll = 0.1, a_other = 0.2;
+
+  pgm_init(&argc, argv); wm_init2();
+
+  while ((c = getopt(argc, argv, "a:b:t:m:s:l:")) != EOF) {
+    switch (c) {
+        case 'a':
+        a_ll = atof(optarg);
+        break;
+        case 'b':
+        a_other = atof(optarg);
+        break;
+        case 't':
+        coeff_start_1 = atoi(optarg);
+        break;
+        case 'm':
+        wm_length_1 = atoi(optarg);
+        break;
+        case 's':
+        coeff_start_ll = atoi(optarg);
+        break;
+        case 'l':
+        wm_length_ll = atoi(optarg);
+        break;
+    }
+  }
+  argc -= optind;
+  argv += optind;
+
+  in = stdin;
+  open_image(in, &width, &height);
+  image_i = imatrix(height, width);
+  load_image(image_i, in, width, height);
+
+  if (height == width)
+    N = height;
+  else {
+    fprintf(stderr, "Cannot Proccess non-square images!\n");
+    exit( -11);
+  }
+  // starting coeff. for 1st level decomp.
+  M1 = coeff_start_1;
+  // number of coeffs to alter
+  L1 = wm_length_1;
+  // alpha parameter
+
+  // now the LL band
+  M2 = coeff_start_ll;
+  L2 = wm_length_ll;
+
+
+  i = dmatrix(N, N);
+  ll = dmatrix(N / 2, N / 2);
+  lh = dmatrix(N / 2, N / 2);
+  hl = dmatrix(N / 2, N / 2);
+  hh = dmatrix(N / 2, N / 2);
+  v1 = dvector(N * N / 4);
+  v2 = dvector(N * N / 4);
+  v3 = dvector(N * N / 4);
+  v99 = dvector(N * N / 4);
+
+  matrix_i2d(image_i, i, N);
+
+  //---------------------1o decomposition-------------------
+  add_hor_add_ver(i, N, ll);
+  add_hor_sub_ver(i, N, lh);
+  sub_hor_add_ver(i, N, hl);
+  sub_hor_sub_ver(i, N, hh);
+  //---------------------Detect Watermark from all bands----
+  put_matrix_2_vector(lh, v1, N / 2);
+  put_matrix_2_vector(hl, v2, N / 2);
+  put_matrix_2_vector(hh, v3, N / 2);
+  put_matrix_2_vector(ll, v99, N / 2);
+  fct2d(v1, N / 2, N / 2);
+  fct2d(v2, N / 2, N / 2);
+  fct2d(v3, N / 2, N / 2);
+  fct2d(v99, N / 2, N / 2);
+  for (key = 1; key <= 1000; key++) {
+    m1 = detect_mark(v1, N / 2, key, L1, M1, a_other);
+    m2 = detect_mark(v2, N / 2, key, L1, M1, a_other);
+    m3 = detect_mark(v3, N / 2, key, L1, M1, a_other);
+    m99 = detect_mark(v99, N / 2, key, L2, M2, a_ll);
+    detect_value = (m1 + m2 + m3 + m99) / 4;
+    printf("%ld\t%f\t%f\t%f\t%f\t%f\n", key, m1, m2, m3, m99, detect_value);
+  }
+  //--------------------------------------------------------
+  free(v1);
+  free(v2);
+  free(v3);
+  free(v99);
+  freematrix_d(ll, N / 2);
+  freematrix_d(hl, N / 2);
+  freematrix_d(lh, N / 2);
+  freematrix_d(hh, N / 2);
+  fclose(in);
+
+  exit(EXIT_SUCCESS);
+}
+
+
+
+