• vdgl_digital_curve_sptr : vdgl_digital_curve_sptr.h
• vdgl_digital_region_sptr : vdgl_digital_region_sptr.h
• vdgl_edgel_chain_sptr : vdgl_edgel_chain_sptr.h
• vdgl_interpolator_sptr : vdgl_interpolator_sptr.h