Abstract:The bowlshaped broken pieces reassembly algorithmbased on the inner surface characteristics can effectively avoid the oversegmentation problem caused by the fracture surface

while the difficulty liesin the accurate extraction of inner surface Therefore

an identificationalgorithm for inner surface of bowlshaped broken pieces based on point cloudproportion and smoothness is proposed Firstly

the surface of bowlshaped brokenpieces is divided into fracture surface

bottom surface

original surface

inner surface and outer surface based on the region growing algorithm And then

according to the significant difference of point cloud proportion

the innersurface and outer surface are identified from the segmented surface groupFinally

the inner surface is extracted by the smoothness value Theexperimental results show that this algorithm can accurately extract the innersurface of bowlshaped broken pieces and has a higher calculation speed thanother algorithm