extern double image_sig_border_size;
extern int image_sig_border_bonus;
extern double image_sig_inertia_scale[];
extern double image_sig_textured_threshold;
extern int image_sig_compare_method;
extern double image_sig_border_size;
extern int image_sig_border_bonus;
extern double image_sig_inertia_scale[];
extern double image_sig_textured_threshold;
extern int image_sig_compare_method;