Takeshi Takai, Koichiro Niinuma, Atsuto Maki, Takashi Matsuyama. Difference Sphere: An Approach to Near Light Source Estimation. In 2004 IEEE Computer Society Conference on Computer Vision and Pattern Recognition (CVPR 2004), with CD-ROM, 27 June - 2 July 2004, Washington, DC, USA. pages 98-105, IEEE Computer Society, 2004. [doi]
Abstract is missing.