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Dynamic 3D models with local and global deformations: deformable superquadrics

机译:具有局部和整体变形的动态3D模型:可变形的超二次元

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The authors present a physically based approach to fitting complex three-dimensional shapes using a novel class of dynamic models that can deform both locally and globally. They formulate the deformable superquadrics which incorporate the global shape parameters of a conventional superellipsoid with the local degrees of freedom of a spline. The model's six global deformational degrees of freedom capture gross shape features from visual data and provide salient part descriptors for efficient indexing into a database of stored models. The local deformation parameters reconstruct the details of complex shapes that the global abstraction misses. The equations of motion which govern the behavior of deformable superquadrics make them responsive to externally applied forces. The authors fit models to visual data by transforming the data into forces and simulating the equations of motion through time to adjust the translational, rotational, and deformational degrees of freedom of the models. Model fitting experiments involving 2D monocular image data and 3D range data are presented.
机译:作者提出了一种基于物理的方法,可以使用一类新颖的动态模型拟合复杂的三维形状,该模型可以在局部和全局范围内变形。他们制定了可变形的超二次方程,将常规的超椭球体的整体形状参数与样条的局部自由度结合在一起。该模型的六个全局变形自由度从视觉数据中捕获总体形状特征,并提供显着的零件描述符,以有效地索引存储模型的数据库。局部变形参数可重构全局抽象遗漏的复杂形状的细节。控制可变形超二次方程的行为的运动方程式使它们对外部施加的力做出响应。作者通过将数据转换为力并模拟随时间变化的运动方程来调整模型的平移,旋转和变形自由度,从而使模型适合视觉数据。提出了涉及2D单眼图像数据和3D范围数据的模型拟合实验。

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