Perceptual global illumination cancellation in complex projection environments Journal Article

Author(s): Sheng, Yu; Cutler, Barbara; Chen, Chao; Nasman, Joshua
Article Title: Perceptual global illumination cancellation in complex projection environments
Affiliation IST Austria
Abstract: The unintentional scattering of light between neighboring surfaces in complex projection environments increases the brightness and decreases the contrast, disrupting the appearance of the desired imagery. To achieve satisfactory projection results, the inverse problem of global illumination must be solved to cancel this secondary scattering. In this paper, we propose a global illumination cancellation method that minimizes the perceptual difference between the desired imagery and the actual total illumination in the resulting physical environment. Using Gauss-Newton and active set methods, we design a fast solver for the bound constrained nonlinear least squares problem raised by the perceptual error metrics. Our solver is further accelerated with a CUDA implementation and multi-resolution method to achieve 1–2 fps for problems with approximately 3000 variables. We demonstrate the global illumination cancellation algorithm with our multi-projector system. Results show that our method preserves the color fidelity of the desired imagery significantly better than previous methods.
Keywords: Virtual reality; Radiosity
Journal Title: Computer Graphics Forum
Volume: 30
Issue 4
ISSN: 1467-8659
Publisher: Wiley  
Date Published: 2011-07-19
Start Page: 1261
End Page: 1268
DOI: 10.1111/j.1467-8659.2011.01985.x
Open access: no
IST Austria Authors
  1. Chao Chen
    14 Chen