--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Fotopoulos-dir/common.h	Fri Dec 20 13:08:59 2024 +0100
@@ -0,0 +1,28 @@
+#define PI      3.1415926535897932
+#define INVROOT2 0.7071067814
+
+void open_image(FILE *in, int *width, int *height);
+void load_image(int **im, FILE *in, int width, int height);
+void save_image(int **im, FILE *out, int width, int height);
+int ** imatrix(int nrows, int ncols);
+void freematrix(int **I, int rows);
+float ran0(long int *idum);
+float gasdev(long int *idum);
+void put_image_from_int_2_double(int **i, double *f, int N);
+void put_image_from_double_2_int(double *f, int **i, int N);
+void fct2d(double f[], int nrows, int ncols);
+void ifct2d(double f[], int nrows, int ncols);
+void matmul(double **a, double **b, double **r, int N);
+void hartley(double **in, double **out, int N);
+double ** dmatrix(int nrows, int ncols);
+void freematrix_d(double **I, int rows);
+void hartley(double **in, double **out, int N);
+void matrix_i2d(int **i, double **d, int N);
+void matrix_d2i(double **d, int **i, int N);
+void put_matrix_2_vector(double **i, double *f, int N);
+void put_vector_2_matrix(double *f, double **i, int N);
+double * dvector(long int N);
+
+void wm_init();   
+void wm_init1();   
+void wm_init2();