int vdef_calc(image_desc_t *, int);
int vdef_percent_compar(const void *,const void *);
int graph_size_location(image_desc_t *, int, int);
int vdef_calc(image_desc_t *, int);
int vdef_percent_compar(const void *,const void *);
int graph_size_location(image_desc_t *, int, int);