Character Modelling with Sketches and ODE-Based Shape Creation  

作　　者：Ouwen Li Haibin Fu Shaojun Bian Xiaosong Yang Xiaogang Jin Andres Iglesias Algirdas Noreika Lihua You Jian Jun Zhang 

机构地区：[1]National Centre for Computer Animation,Bournemouth University,United Kingdom [2]State Key Lab of CAD&CG,Zhejiang University,China [3]Department of Applied Mathematics and Computational Sciences,University of Cantabria,Spain [4]Department of Information Science,Toho University,Japan [5]Indeform Ltd,Lithuania

出　　处：《Numerical Mathematics(Theory,Methods and Applications)》2023年第3期720-751,共32页高等学校计算数学学报（英文版）

基　　金：supported by the PDE-GIR project,which has received funding from the European Union Horizon 2020 research and innovation programme under the Marie Skodowska-Curie grant agreement No.778035;by the project PID2021-127073OB-I00 of the MCIN/AEI/10.13039/501100011033/FEDER,EU;by the Santander PGR Grants;supported by the Ningbo Major Special Projects of the“Science and Technology Innovation 2025”,grant No.2020Z007.

摘　　要：Character models have enormous applications in industry.Efficient creation of detailed character models is an important topic.This paper proposes a new and easy-to-use technique to quickly create detailed character models from sketches.The proposed technique consists of two main components:primitive deformer and shape generators.With this technique,2D silhouette contours of a character model are drawn or extracted from an image or sketch.Then,proper geometric primitives are selected and aligned with the corresponding 2D silhouette contours.After that,a primitive deformer is used to create a base mesh and three shape generators are used to add 3D details to the base mesh.The primitive deformer and three shape generators are developed from ODE-driven deformations.The primitive deformer deforms the aligned geometric primitives to exactly match the 2D silhouette contours in one view plane and obtains a base mesh of a character model consisting of deformed primitives.The shape generators are used to add 3D details to the base mesh by creating local 3D models.The experimental results demonstrate that the new technique can quickly create detailed 3D character models from sketches with few manual operations.The new technique is physics-based and easy to learn and use.

关 键 词：Sketch-based character modelling shape generators ordinary differential equations finite difference solution 

分 类 号：O15[理学—数学]