Curved plate(shell) representation in solid modeling 23.(See Figure 13.4) Figure 13.4: Plate representation. e feature recognition through construction of skeleto medial axes of geometric models 22, 29.( See Figure 13.5). The medial axis is made up of boundary offset intersections Figure 13.5: Medial Axis The concept of offset curves generalizes to pipe surfaces when the progenitor is a general 3D curve [18] geodesic offsets when the progenitor is curve on a surface[20[25][11]• Curved plate (shell) representation in solid modeling [23]. (See Figure 13.4) Figure 13.4: Plate representation. • Feature recognition through construction of skeletons or medial axes of geometric models [22, 29]. (See Figure 13.5). The medial axis is made up of boundary offset intersections. Figure 13.5: Medial Axis. The concept of offset curves generalizes to • pipe surfaces when the progenitor is a general 3D curve [18]. • geodesic offsets when the progenitor is curve on a surface [20] [25] [11]. 4