Deformation transfer based on stretchiness ratio

Abstract

In this paper we propose a deformation transfer technique that achieves physically-plausible deformation by transferring stretchiness ratios of local edges. Given a source reference mesh, a source deformed mesh, and a target reference mesh, the objective is to transfer deformation between the source reference and deformed onto the target reference, and produce a target deformed mesh. To generate a deformed target, we create a mass-spring system which is topologically consistent with the target reference mesh and multiply the stretchiness ratio between the edge lengths from the source meshes to the rest lengths of that mass-spring system. The deformed new target mesh can be synthesized by computing the equilibrium state of the new mass-spring system. To increase the performance we also adopt a non-linear multi-grid algorithm for solving large scale massspring systems. Stretchiness ratio is a coordinate-free quantity and we show that our method outperform previous approaches in certain cases.

Cage-based deformation transfer using mass spring system

“…Our method can resolve the collapse problem of [Yang et al 2013], and the computation is several times faster than that of [Yang et al 2013]. Figure 1 shows two experimental results of our method and those of [Sumner and Popović 2004].…”

“…Such physical-based methods which generate target deformed models allow plausible physical interaction during deformation process and post-mesh editing. The system [Yang et al 2013] automatically construct a mass spring system for source and target models. Then it transfers spring stretchiness ratio of source reference model and source-deformed model to the target reference model.…”

“…A similar idea works pretty well on mesh interpolation [Ma et al 2012], where each blend shape model is associated with a mass spring system. However, there are severe collapse problem on the result of [Yang et al 2013], as shown in Figure 2.…”

“…Given target-deformed models edited by artists, we compute the [Yang et al 2013] and our system. difference between spring stretchiness ratios of the source models and that of the target models.…”