feature-preserved 3d canonical form

in this paper, we present a feature-preserved canonical form for non-rigid 3d watertight meshes. the basic idea is to naturally deform original models against corresponding initial canonical forms calculated by multidimensional scaling (mds). specifically, objects are first segmented into near-rigid subparts, and then, through properly-designed rotations and translations, original subparts are transformed into poses that correspond well with their positions and directions on mds canonical forms. final results are obtained by solving nonlinear minimization problems for optimal alignments and smoothing boundaries between subparts. experiments on two non-rigid 3d shape benchmarks not only clearly verify the advantages of our algorithm against existing approaches, but also demonstrate that, with the help of the proposed canonical form, we can obtain significantly better retrieval accuracy compared to the state of the art.