selected current projects
Understand and Modeling Human Behaviors in Multiparty ConversationsQuantifying, understanding, and modeling human behaviors and gestures when they are involved with multiparty conversations
Robust Structure Simplification for Hex Re-meshingA robust and automatic algorithm to simplify the structure and reduce the singularities of a hexahedral mesh
Interactive Complex Object Modeling from Multi-view Imagesdevelopment of a novel interactive modeling approach based on multi-view images including interactive 3D modeling and stochastic motion parameter estimation.
Hexahedral Mesh Generation, Optimization, and EvaluationA first and complete pipeline to optimize the global structure of a hex-mesh, by identifying and removing those valid removal base-complex sheets that contain misaligned singularities, and a volumetric partitioning strategy based on a generalized sweeping framework to seamlessly partition the volume of an input triangle mesh into a collection of deformed cuboids.
Robust and Accurate Skeletal Rigging from Mesh/Point SequencesUsing the input of an animated mesh sequence, this approach can automatically extract its optimal skeleton structure, joint positions, linear blend skinning weights, and the corresponding bone transformations.
Live Speech Driven Facial AnimationFully-automated algorithms to generate realistic lip-sync and head-and-eye animations based on live speech input alone, which can run in real-time on an off-the-shelf computer.
Two-layer Sparse Compression of Dense-Weight Blend SkinningIt introduces an efficient two-layer sparse compression technique to substantially reduce the computational cost of a dense-weight skinning model, with insignificant loss of its visual quality.
Smooth Skinning Decomposition with Rigid BonesThe SSDR model can effectively approximate the skin deformation of nearly articulated models as well as highly deformable models by a low number of rigid bones and a sparse, convex bone-vertex weight map.
Realistic Traffic Simulation and EvaluationDesign of novel and efficient algorithms and systems to simulate large-scale realistic traffic in various road and urban settings, including mixed traffic, lane-changing, simulated traffic evaluation, and intersectional traffic simulation.
Two CGF papers (one was published in 2019, the second is still in press) are Top 10% downloaded CGF papers 2018 - 2019 (i.e., from Jan 2018 to Dec 2019).
I will give an invited plenary talk on AIVR 2020 (4th International Conference on Artificial Intelligence and Virtual Reality) in October at Kumamoto, Japan.
Our SSDR work ("Smooth Skinning Decomposition with Rigid Bones", Siggraph Asia 2012) has been incorporated into many mainstream graphics/animation packages, including Maya, Houdini, and Blender, and has been used in many game studios including Electronic Arts (EA) and Naughty Dog. The open-source code of our SSDR work can be found in this LINK. Also check out this UH News.
Our paper "Robust Structure Simplification for Hex Re-meshing" was accepted to ACM SIGGRAPH Asia 2017 Conference as a full technical paper.
Our paper "Topologically Consistent Leafy Tree Morphing" won the Best Paper Award on the International Conference on Computer Animation and Social Agents (CASA) 2017.
Our paper "eye contact based speaker identification in multiparty conversations" was accepted to ACM CHI 2017 Conference as a full research paper.
I am officially promoted to a Full Professor at UH Computer Science Department, Effective on 9/1/2016 (after working exactly ten years at UH).
I together with Prof. Chen receive a new DoD DURIP grant to build a scalable high-fidelity visual computing infrastructure at University of Houston.
I receive a Faculty Academic Excellence Award in recognition extraordinary academic achievements from the Department of Computer Science at University of Houston, during the Department's 2015 annual award recognition event.
I receive a new NSF research grant to work on "Digitally Mediated Multi-party Communication" which starts on 9/1/2015.
I am appointed as the new Director of Graduate Studies in the Department of Computer Science at UH, which will be effective since September 2015.
Our paper titled "Hexahedral Mesh Re-parameterization from Aligned Base Domains" (with X. Gao and G. Chen) is accepted to ACM SIGGRAPH 2015 Conference as a technical paper.
I am a co-recipient of "Ten Year Technical Impact Award" (on ACM ICMI 2014 Conference) for my co-authored ICMI 2004 paper "Analysis of Emotion Recognition using Facial Expressions, Speech and Multimodal Information".
I serve as a general co-chair of ACM SIGGRAPH/Eurographics Symposium on Computer Animation (SCA) 2015 that will be held at Los Angeles, CA. Here is the official SCA 2015 website.
I co-instruct a half-day "Skinning: Real-time Shape Deformation" course (with A. Jacobson, L. Kavan, and J. Lewis) on the ACM SIGGRAPH 2014 Conference.
Our paper titled "Robust and Accurate Skeletal Rigging from Mesh Sequences" (with my PhD student Binh H. Le) was accepted to ACM SIGGRAPH 2014 Conference as a technical paper.