Miguel Villalba, EderIST Austria ; Miraut, David ; Otaduy, Miguel
In this paper, we present a method to model hyperelasticity that is well suited for representing the nonlinearity of real-world objects, as well as for estimating it from deformation examples. Previous approaches suffer several limitations, such as lack of integrability of elastic forces, failure to enforce energy convexity, lack of robustness of parameter estimation, or difficulty to model cross-modal effects. Our method avoids these problems by relying on a general energy-based definition of elastic properties. The accuracy of the resulting elastic model is maximized by defining an additive model of separable energy terms, which allow progressive parameter estimation. In addition, our method supports efficient modeling of extreme nonlinearities thanks to energy-limiting constraints. We combine our energy-based model with an optimization method to estimate model parameters from force-deformation examples, and we show successful modeling of diverse deformable objects, including cloth, human finger skin, and internal human anatomy in a medical imaging application.
Computer Graphics Forum
This work was funded in part by grants from the Spanish Ministry of Economy (TIN2012-35840), the European Research Council (ERC Starting Grant no. 280135 Animetrics), and the EU FP7 (project no. 601165 WEARHAP).
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Miguel Villalba E, Miraut D, Otaduy M. Modeling and estimation of energy-based hyperelastic objects. Computer Graphics Forum. 2016;35(2):385-396. doi:10.1111/cgf.12840
Miguel Villalba, E., Miraut, D., & Otaduy, M. (2016). Modeling and estimation of energy-based hyperelastic objects. Computer Graphics Forum, 35(2), 385–396. https://doi.org/10.1111/cgf.12840
Miguel Villalba, Eder, David Miraut, and Miguel Otaduy. “Modeling and Estimation of Energy-Based Hyperelastic Objects.” Computer Graphics Forum 35, no. 2 (2016): 385–96. https://doi.org/10.1111/cgf.12840.
E. Miguel Villalba, D. Miraut, and M. Otaduy, “Modeling and estimation of energy-based hyperelastic objects,” Computer Graphics Forum, vol. 35, no. 2, pp. 385–396, 2016.
Miguel Villalba E, Miraut D, Otaduy M. 2016. Modeling and estimation of energy-based hyperelastic objects. Computer Graphics Forum. 35(2), 385–396.
Miguel Villalba, Eder, et al. “Modeling and Estimation of Energy-Based Hyperelastic Objects.” Computer Graphics Forum, vol. 35, no. 2, Wiley-Blackwell, 2016, pp. 385–96, doi:10.1111/cgf.12840.