1. Polynomial texture maps;Malzbender,2001
2. Photometric method for determining surface orientation from multiple images;Woodham;Opt. Eng.,1980
3. M. Mudge, Cultural Heritage Imaging, personal communication (2010).
4. New reflection transformation imaging methods for rock art and multiple-viewpoint display;Mudge,2006
5. Visibility subspaces: uncalibrated photometric stereo with shadows;Sunkavalli,2010