Free Form Incident Light Fields

This paper presents methods for photo-realistic rendering using strongly spatially variant illumination captured from real scenes. The illumination is captured along arbitrary paths in space using a high dynamic range, HDR, video camera system with position tracking. Light samples are rearranged into 4-D incident light fields (ILF) suitable for direct use as illumination in renderings. Analysis of the captured data allows for estimation of the shape, position and spatial and angular properties of light sources in the scene. The estimated light sources can be extracted from the large 4D data set and handled separately to render scenes more efficiently and with higher quality. The ILF lighting can also be edited for detailed artistic control. Categories and Subject Descriptors (according to ACM CCS): I.3.7 [Computer Graphics]: Three-Dimensional Graphics and Realism; I4.1 [Image Processing and Computer Vision]: Digitization and Image Capture;

• Type: Journal
• Year: 2008
• Where: CGF
• Authors: Jonas Unger, Stefan Gustavson, P. Larsson, Anders Ynnerman
• Keywords: 4-D Incident Light, CGF 2008, Light Sources, Variant Illumination