METHOD AND DEVICE FOR MODELING OF DEFORMATION MOTION OF ELASTIC OBJECT

摘要

The present disclosure discloses a method and a device for elastic object deformation modeling. The method comprises: acquiring a static point cloud of the elastic object and dynamic point cloud sequences; establishing a simulation tetrahedral mesh model; driving the simulation tetrahedral mesh model to track the dynamic point cloud sequences, to obtain track deformation sequences; iteratively estimating material property coefficients and corresponding reference shapes of the elastic object; performing the following operations in each iteration: obtaining a reference shape corresponding to a current material property coefficient; driving the simulation tetrahedral mesh model to simulate the deformation from the same initial deformation according to the coefficient and the reference shape to obtain a simulation deformation sequences; calculating a positional deviation between the simulation deformation sequences and the track deformation sequences; and updating the material property coefficients in a direction in which the positional deviation is decreased; establishing an elastic object deformation model according to a material property coefficient under a minimum positional deviation and corresponding reference shape. The technical solution can establish a vivid elastic object deformation model.

主权项

1. A method for elastic object deformation modeling, comprising:
acquiring a static point cloud of the elastic object and dynamic point cloud sequences during the deformation; establishing a simulation tetrahedral mesh model for simulating the deformation of the elastic object according to the static point cloud; driving the simulation tetrahedral mesh model to track the dynamic point cloud sequences, to obtain track deformation sequences of the simulation tetrahedral mesh model; iteratively estimating material property coefficients and reference shape of the elastic object; performing the following operations in each iteration until the material property coefficient and its corresponding reference shape achieve a minimum positional deviation: obtaining a reference shape of the simulation tetrahedral mesh model corresponding to a current material property coefficient of the elastic object; driving the simulation tetrahedral mesh model to simulate the deformation of the elastic object from the same initial deformation according to the current material property coefficient and the reference shape; calculating a positional deviation between the simulation deformation sequences and the track deformation sequences; and updating the material property coefficients of the elastic object in a direction in which the positional deviation is decreased; establishing a deformation model using the material property coefficient and its corresponding reference shape of the elastic object which can achieve minimum positional deviation.