1. Wada, T., Matsuyama, T.: Shape from shading on textured cylindrical surface restoring distorted scanner images of unfolded book surfaces. In: Proceedings of the IAPR Workshop on Machine Vision and Applications, pp. 591–594. Tokyo, Japan (1992)
2. Kanungo, T., Haralick, R.M., Phillips, I.: Global and local document degradation models. In: Proceedings of the 2nd International Conference on Document Analysis and Recognition, pp. 730–734. Tsukuba, Japan (1993)
3. Zhang R., Tsai P.S., Cryer J.E. and Shah M. (1999). Shape from Shading: a survey. IEEE Trans. Patt. Anal. Mach. Intell. 21(8): 690–706
4. Durou, J.D., Falcone, M., Sagona, M.: A survey of numerical methods for shape from shading. Rapport de Recherche 2004-2-R, Institut de Recherche en Informatique de Toulouse, Toulouse, France (2004)
5. Prados, E., Faugeras, O.: Perspective shape from shading and viscosity solutions. [44] 826–831