Kiyoaki Atsuta, Manas Sangworasil, Shozo Kondo. A new method of estimating shape from shading by using a constraint at zero-crossings of image brightness. In 9th International Conference on Pattern Recognition, ICPR 1988, 14-17 November 1988, Ergife Palace Hotel, Rome, Italy. pages 666-668, IEEE, 1988. [doi]
Abstract is missing.