-/*************************************************************************
- * FUNCTION DECLARATIONS
- ************************************************************************/
-
-// convolve.cpp
-double convolve (const double f1[], const double f2[], const double dx, const int n, const int np, const FunctionSymmetry func_type);
-
-// dialogs.cpp
-bool phm_add_pelem_kb (Phantom& phm);
-const Phantom& phm_select (Phantom& phm);
-int interpolation_select (void);
-int filter_select (double *filter_param);
-
-// filter.cpp
-double *filter_generate (const FilterType filt_type, double bw, double xmin, double xmax, int n, double param, const DomainType domain, int numint);
-double filter_spatial_response_calc (int filt_type, double x, double bw, double param, int n);
-double filter_spatial_response_analytic (int filt_type, double x, double bw, double param);
-double filter_frequency_response (int filt_type, double u, double bw, double param);
-double sinc (double x, double mult);
-double integral_abscos(double u, double w);
-
-// options.cpp
-int opt_set_trace(const char *optarg);
-const char *name_of_phantom(const int phmid);
-int opt_set_phantom(const char *optarg);
-InterpolationType opt_set_interpolation(const char *optarg);
-const char *name_of_interpolation(int interp_type);
-FilterType opt_set_filter(const char *optarg);
-const char *name_of_filter(const int filter);
-DomainType opt_set_filter_domain(const char *optarg);
-const char *name_of_filter_domain(const DomainType domain);
-BackprojType opt_set_backproj(const char *optarg);
-const char *name_of_backproj(const BackprojType backproj);
-
-// From phm2image.cpp
-void phm_to_imagefile (const Phantom& phm, ImageFile& im, const int col_start, const int col_count, const int nsample, const int trace);
-
-// image.cpp
-void image_filter_response(ImageFile& im, const DomainType domain, double bw, const FilterType filt_type, double filt_param, const int opt_trace);
-int image_display (const ImageFile& im);
-int image_display_scale (const ImageFile& im, const int scale, const double pmin, const double pmax);
-
-// From reconstr.cpp
-ImageFile& proj_reconst (ImageFile& im, Projections& rs, const FilterType filt_type, double filt_param, InterpolationType interp_type, int interp_param, const BackprojType backproj_type, int const ir_trace);
-