Takayuki Okatani, Koichiro Deguchi. Closed Form Solution of Local Shape from Shading at Critical Points. International Journal of Computer Vision, 40(2):169-178, 2000.
@article{OkataniD00:1, title = {Closed Form Solution of Local Shape from Shading at Critical Points}, author = {Takayuki Okatani and Koichiro Deguchi}, year = {2000}, researchr = {https://researchr.org/publication/OkataniD00%3A1}, cites = {0}, citedby = {0}, journal = {International Journal of Computer Vision}, volume = {40}, number = {2}, pages = {169-178}, }