期刊名称：ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
印刷版ISSN：2194-9042
电子版ISSN：2194-9050
出版年度：2004
卷号：XXXV Part B5
页码：672-677
出版社：Copernicus Publications
摘要：Shape from Shading is one of the methods used for shape recovery which exploits the fact that surface patches, having different inclination relative to a light source are imaged with different brightness. In order to solve the DTM reconstruction problem by SFS the image formation process has to be modeled and eventually inverted with respect to the parameters describing the object surface. Surface reflectance can be exactly described by its bi-directional distribution function (BDRF). In this paper we show that there exist images that could not have arisen from shading on the smooth surface with uniform reflecting properties. This means that the gray shade values are also significantly influenced by the other factors, which have not been included into SFS functional model
