Expertise in physically-based simulation: Fluid
Derivative Particles
With previous methods
including the Particle Level Set Method
With our method (Derivative Particles)

Derivative particles for simulating detailed movements of fluids [.pdf]
O Song, D Kim, HS Ko
IEEE Transactions on Visualization and Computer Graphics 2007
US Patent 7,565,276, 2009


Unsplit Semi-Lagrangian CIP (USCIP)
Our USCIP fixes all existing problems of CIP with a significant improvements in both accuracy and speed.

A Semi-Lagrangian CIP Fluid Solver without Dimensional Splitting [.pdf]
D Kim, O Song, HS Ko.
Computer Graphics Forum (EUROGRAPHICS) 2008


Stretching, Wiggling, Tearing Liquids
With our method, a single PC can realistically reproduce complex fluid scenes

Stretching, Wiggling, Tearing Liquids [.pdf]
D Kim, O Song, HS Ko.
SIGGRAPH Asia 2009
US Patent 8,386,224, 2013


Dispersed Bubble Flow

A Practical Simulation of Dispersed Bubble Flow [.pdf]
D Kim, O Song, HS Ko.
SIGGRAPH 2010
US Patent 8,577,659, 2013


Expertise in physically-based simulation: Deformable Solids
Modal Warping

Modal Warping: Real-Time Simulation of Large Rotational Deformation and Manipulation [.pdf]
M Choi, HS Ko.
IEEE Transactions on Visualization and Computer Graphics 2005
US Patent 7,493,243, 2009


Thin Shells

Real-Time Simulation of Thin Shells [.pdf]
M Choi, S Woo, HS Ko.
EUROGRAPHICS 2007


Expertise in physically-based simulation: Hair
Hairstyle Modeling

A Statistical Wisp Model and Pseudophysical Approaches for Interactive Hairstyle Generation [.pdf]
B Choe, HS Ko.
IEEE Transactions on Visualization and Computer Graphics 2005
US Patent 7,418,371, 2008


Hair Simulation

Simulating Complex Hair with Robust Collision Handling [.pdf]
B Choe, M Choi, HS Ko.
Eurographics/ACM SIGGRAPH Symposium on Computer Animation 2005


Expertise in physically-based simulation: Clothing
Our Breakthrough in Clothing Simulation in SIGGRAPH 2002
Until 2001
With our technique in 2002

Stable but Responsive Cloth [.pdf]
KJ Choi, HS Ko.
SIGGRAPH 2002 Paper
SIGGRAPH 2005 Course


Constrainable Multigrid for Cloth

Constrainable multigrid for cloth [.pdf]
I Jeon, KJ Choi, TY Kim, BO Choi, HS Ko.
Computer Graphics Forum 2013
US Patent App. 14/187,106, 2015


Garment Fit Customization

Heuristic misfit reduction: a programmable approach for 3D garment fit customization [.pdf]
W Lee, HS Ko.
Computer & Graphics 2018


Garment Stratification for Virtual Try-On

Garment preconditioning and regional simulation omission for trying-on virtual ensembles [.pdf]
DH Han, IH Cha, KH Lee, HS Ko.
Proceedings of the 32nd International Conference on Computer Animation and Social Agents 2019


Resolving Clothing Tanglements with Explicit Convergence

Tanglement resolution in clothing simulation with explicit convergences [.pdf]
IH Cha, HS Ko.
IEEE Transactions on Visualization and Computer Graphics, 2020


Improving Normal Cone Merging for Clothing Simulation

Tight Normal Cone Merging for Efficient Collision Detection of Thin Deformable Objects [.pdf]
DH Han, CJ Lee, S Lee, HS Ko.
EUROGRAPHICS 2021


Solving the Final Chapter of Collision Resolution during Clothing Simulation

BLI-resolver: resolving the boundary-loop-interior type intersections for clothing simulation [.pdf]
IH Cha, HS Ko.
The Visual Computer 2022


Transforming Dress: a New JenRe of Fashion Show

Transforming Dress [.pdf]
Sehee Wu, Yeonkyung Kang, Zi Young Kang, Anna Kim, Naeun Kim, Kathi Martin, Hyeong-Seok Ko.
1st International Conference on Digital Fashion 2013, London, UK


Excellence in Teaching

Since 2022, for every Spring and Fall semester, receiving the best lecture award from SNU.


Invited Speeches
Animation studios
  • Sony Imageworks
  • Disney Feature Animation
  • Rhythm & Hue
  • Industrial Light + Magic
Conferences
  • CASA 2007 Conference
  • EUROGRAPHICS 2003 (State-of-the-Art Report)
Position Prof. Ko seeks
Lecturing 1~2 courses in Spring 2024/2025 or Spring 2025/2026
  • Will take a year of sabbatical leave from SNU during Jan 2025 ~ Aug 2026

Undergraduate courses Prof. Ko can teach
Python Programming
  • Basic level course to freshmen
  • Develops a video game as the term project
  • The TA will accompany from SNU, who will give the guidance needed for the development
OOP with C++ and OpenGL
  • Suited for sophomores or juniors
  • Develops a video game as the term project
  • The TA will accompany from SNU, who will give the guidance needed for the development
Computer Graphics with OpenGL Programming

Graduate courses Prof. Ko can teach
Physically-based clothing simulation
  • Targeted to engineering MS or PhD degree candidates
Introduction to Digital Clothing including Practices with DC Suite
  • Targeted to fashion major MS or PhD, or even undergraduate students
  • Produces potential participants to the Digital Fashion Award
  • Prof. Ko will use two textbooks written for this course
    • Introduction to Digital Clothing, Practices with DC Suite
    • An Advanced Course for Digital Fashion, Practices with DC Suite
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