Inverse Light Design for High-occlusion Environments

Lighting design is a demanding but very important task in computer cinematography, games and architectural design. Computer-assisted lighting design aims at providing the designers with tools to describe the desired outcome and derive a suitable lighting configuration to match their goal. In this paper, we present an automatic approach to the inverse light source emittance and positioning problem, based on a layered linear / non-linear optimization strategy and the introduction of a special light source indexing according to the compatibility of each individual luminary position with the desired illumination. Our approach is independent of a particular light transport model and can quickly converge to an appropriate and plausible light configuration that approximates the desired illumination and can handle environments with high occlusion.

[1]  Yasuyuki Matsushita,et al.  Illumination Brush: Interactive Design of All-Frequency Lighting , 2007, 15th Pacific Conference on Computer Graphics and Applications (PG'07).

[2]  Philip Dutré,et al.  Image-based lighting design , 2004 .

[3]  Kevin G. Suffern,et al.  Painting with light , 2002, SIGGRAPH '02.

[4]  Wen-Chieh Lin,et al.  Interactive Lighting Design with Hierarchical Light Representation , 2013, Comput. Graph. Forum.

[5]  Mateu Sbert,et al.  Heuristic-Search-Based Light Positioning According to Irradiance Intervals , 2009, Smart Graphics.

[6]  John A. Nelder,et al.  A Simplex Method for Function Minimization , 1965, Comput. J..

[7]  Pierre Poulin,et al.  Sketching shadows and highlights to position lights , 1997, Proceedings Computer Graphics International.

[8]  Mateu Sbert,et al.  Energy-saving light positioning using heuristic search , 2012, Eng. Appl. Artif. Intell..

[9]  Eduardo Fernández,et al.  Inverse lighting design for interior buildings integrating natural and artificial sources , 2012, Comput. Graph..

[10]  Gustavo Patow,et al.  A Survey of Inverse Rendering Problems , 2003, Comput. Graph. Forum.

[11]  Michael F. Cohen,et al.  Radioptimization: goal based rendering , 1993, SIGGRAPH.

[12]  Pierre Poulin,et al.  Lights from highlights and shadows , 1992, I3D '92.

[13]  Derek Nowrouzezahrai,et al.  State of the Art in Artistic Editing of Appearance, Lighting and Material , 2016, Comput. Graph. Forum.

[14]  Adam Finkelstein,et al.  Lighting with paint , 2007, TOGS.

[15]  Christer Sjöström,et al.  State-of-the-art report , 1997 .

[16]  António Augusto de Sousa,et al.  Lighting Design: A Goal Based Approach using Optimisation , 1999, Rendering Techniques.

[17]  G. Ward,et al.  Proceedings of the 10th Eurographics conference on Rendering , 1999 .

[18]  Charles L. Lawson,et al.  Solving least squares problems , 1976, Classics in applied mathematics.

[19]  Donald P. Greenberg,et al.  A user interface for interactive cinematic shadow design , 2002, SIGGRAPH.