Research

Jaakko Lehtinen

Jaakko Lehtinen, Ph.D.
Senior Research Scientist
Bio:

Jaakko started out as a graphics programmer for Remedy Entertainment, an independent Helsinki, Finland based computer game studio, and contributed significantly to the look and feel of Max Payne 1 (2001), Max Payne 2 (2003) and Alan Wake (2010) through his work on rendering, modeling, and lighting technology. Jaakko obtained his Ph.D. from Helsinki University of Technology (now Aalto University School of Science and Technology) in 2007, after which he worked in research and teaching for two and a half years as a postdoctoral associate with Frédo Durand in the MIT graphics group. He joined NVIDIA Research in June 2010. Jaakko's interests span most areas of computer graphics, focusing on physically based rendering.

Research Interests:

Physically-Based Rendering, Illumination, Shading and Shadowing, Physically-Based Modeling, Image Processing and Computational Photography

Publications:
Audio-Driven Facial Animation by Joint End-to-End Learning of Pose and Emotion
Facial Performance Capture with Deep Neural Networks
Reflectance Modeling by Neural Texture Synthesis
Occluder Simplification using Planar Sections
Gradient-Domain Metropolis Light Transport
Practical SVBRDF Capture in the Frequency Domain
Reconstructing the Indirect Light Field for Global Illumination
Clipless Dual-Space Bounds for Faster Stochastic Rasterization
Temporal Light Field Reconstruction for Rendering Distribution Effects
Decoupled Sampling for Graphics Pipelines
A Hierarchical Volumetric Shadow Algorithm for Single Scattering
Sketching Clothoid Splines Using Shortest Paths
A Meshless Hierarchical Representation for Light Transport
A Framework for Precomputed and Captured Light Transport
Incremental Instant Radiosity for Real-Time Indirect Illumination
An Improved Physically-Based Soft Shadow Volume Algorithm
Soft Shadow Volumes for Ray Tracing
Hemispherical Rasterization for Self-Shadowing of Dynamic Objects
Matrix Radiance Transfer