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DTSTAMP:20240214T070250Z
LOCATION:Meeting Room C4.8\, Level 4 (Convention Centre)
DTSTART;TZID=Australia/Melbourne:20231215T151500
DTEND;TZID=Australia/Melbourne:20231215T152500
UID:siggraphasia_SIGGRAPH Asia 2023_sess171_papers_534@linklings.com
SUMMARY:A Hessian-Based Field Deformer for Real-Time Topology-Aware Shape 
 Editing
DESCRIPTION:Technical Papers\n\nYunxiao Zhang, Zixiong Wang, Zihan Zhao, a
 nd Rui Xu (Shandong University); Shuangmin Chen (Qingdao University of Sci
 ence and Technology); Shiqing Xin (Shandong University); Wenping Wang (Tex
 as A&M University); and Changhe Tu (Shandong University)\n\nShape manipula
 tion is a central research topic in computer graphics. Topology editing, s
 uch as breaking apart connections, joining disconnected ends, and filling/
 opening a topological hole, is generally more challenging than geometry ed
 iting. In this paper, we observe that the saddle points of the signed dist
 ance function (SDF) provide useful hints for altering surface topology del
 iberately. Based on this key observation, we parameterize the SDF into a c
 ubic trivariate tensor-product B-spline function 𝐹 whose saddle points s_i
  can be quickly exhausted based on a subdivision-based root-finding techni
 que coupled with Newton’s method. Users can select one of the candidate po
 ints, say s_i, to edit the topology in real time. In implementation, we ad
 d a compactly supported B-spline function rooted at s_i, which we call a d
 eformer in this paper, to F, with its local coordinate system aligning wit
 h the three eigenvectors of the Hessian. Combined with ray marching techni
 que, our interactive system operates at 30 FPS. Additionally, our system e
 mpowers users to create desired bulges or concavities on the surface. An e
 xtensive user study indicates that our system is user-friendly and intuiti
 ve to operate. We demonstrate the effectiveness and usefulness of our syst
 em in a range of applications, including fixing surface reconstruction err
 ors, artistic work design, 3D medical imaging and simulation, and antiquit
 y restoration. Please refer to the attached video for a demonstration.\n\n
 Registration Category: Full Access\n\nSession Chair: Qixing Huang (Univers
 ity of Texas at Austin)
URL:https://asia.siggraph.org/2023/full-program?id=papers_534&sess=sess171
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