Ethan

Yixin Zhuang yixin_Chinese

Assitant Researcher

National Digital Switching System Engineering & Technological Research Center(NDSC)

Phone: 86-15690878480

Email: yixin.zhuang at gmail.com

Bio

I am now an assistant researcher in National Digital Switching System Engineering & Technological Research Center(NDSC), China. I received my Ph.D degree in Computer Science in 2015 from National University of Defense Technology, China, under the supervision of Prof. Yueshan Xiong. From 2012 Sep. to 2014 Sep., I studied at Washington University in St.Louis as a visiting scholar supervised by Prof. Tao Ju.

My primary research area is computer graphics, with particular interests in geometric modeling and processing.

Education

Publications

cycle discovery

A general and efficient method for finding cycles in 3D curve networks

SIGGRAPH Asia 2013, ACM Transactions on Graphics
Yixin Zhuang, Ming Zou, Nathan Carr, Tao Ju

Generating surfaces from 3D curve networks has been a longstanding problem in computer graphics. Recent attention to this area has resurfaced as a result of new sketch based modeling systems. In this work we present a new algorithm for finding cycles that bound surface patches. Unlike prior art in this area, the output of our technique is unrestricted, generating both manifold and non-manifold geometry with arbitrary genus. The novel insight behind our method is to formulate our problem as finding local mappings at the vertices and curves of our network, where each mapping describes how incident curves are grouped into cycles. This approach lends us the efficiency necessary to present our system in an interactive design modeler, whereby the user can adjust patch constraints and change the manifold properties of curves while the system automatically re-optimizes the solution.
| PDF | Supplemental | Demo+Data | Source Code |

anisotropic geodesics

Anisotropic geodesics for live-wire mesh segmentation

Pacific Graphics 2014, Computer Graphics Forum
Yixin Zhuang, Ming Zou, Nathan Carr, Tao Ju

We present an interactive method for mesh segmentation that is inspired by the classical live-wire interaction for image segmentation. The core contribution of the work is the definition and computation of wires on surfaces that are likely to lie at segment boundaries. We define wires as geodesics in a new tensor-based anisotropic metric, which improves upon previous metrics in stability and feature-awareness. We further introduce a simple but effective mesh embedding approach that allows geodesic paths in an anisotropic path to be computed efficiently using existing algorithms designed for Euclidean geodesics. Our tool is particularly suited for delineating segmentation boundaries that are aligned with features or curvature directions, and we demonstrate its use in creating artist-guided segmentations.
| PDF | Supplemental | Demo+Data | Source Code |

shape correspondence

Deformation-Driven Topology-Varying 3D Shape Correspondence

Siggraph Asia 2015, ACM Transaction on Graphics
Ibraheem Alhashim, Kai Xu, Yixin Zhuang, Junjie Cao, Patricio Simari, Hao Zhang

We present a deformation-driven approach to topology-varying 3D shape correspondence. In this paradigm, the best correspondence between two shapes is the one that results in a minimal-energy, possibly topology-varying, deformation that transforms one shape to conform to the other while respecting the correspondence. Our deformation model, called GeoTopo transform, allows both geometric and topological operations such as part split, duplication, and merging, leading to fine-grained and piecewise continuous correspondence results. The key ingredient of our correspondence scheme is a deformation energy that penalizes geometric distortion, encourages structure preservation, and simultaneously allows topology changes. This is accomplished by connecting shape parts using structural rods, which behave similarly to virtual springs but simultaneously allow the encoding of energies arising from geometric, structural, and topological shape variations. Driven by the combined deformation energy, an optimal shape correspondence is obtained via a pruned beam search. We demonstrate our deformation-driven correspondence scheme on extensive sets of man-made models with rich geometric and topological variation and compare the results to state-of-the-art approaches.
| PDF | Source code |

Softwares

1. Cycle discovery finds the right topology and geometry from 3D curve network.
2. 3D Live-wire, similar as 2D live-wire, allows user to draw feature guided lines on the surface.