Events

Pieter Peers, Bruce Lamond, Abhijeet Ghosh, Paul Debevec, Dhruv Mahajan, Wojciech Matusik, Ravi Ramamoorthi: “Compressive Light Transport Sensing”

August 6, 2009 | New Orleans, LA

Speaker: Pieter Peers, Bruce Lamond, Abhijeet Ghosh, Paul Debevec, Dhruv Mahajan, Wojciech Matusik, Ravi Ramamoorthi
Host: ACM SIGGRAPH 2009

In this paper we propose a new framework for capturing light transport data of a real scene, based on the recently developed theory of compressive sensing. Compressive sensing offers a solid mathematical framework to infer a sparse signal from a limited number of non-adaptive measurements. Besides introducing compressive sensing for fast acquisition of light transport to computer graphics, we develop several innovations that address specific challenges for image-based relighting, and which may have broader implications. We develop a novel hierarchical decoding algorithm that improves reconstruction quality by exploiting inter-pixel coherency relations. Additionally, we design new non-adaptive illumination patterns that minimize measurement noise and further improve reconstruction quality. We illustrate our framework by capturing detailed high-resolution reflectance fields for image-based relighting.