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- W2512208363 abstract "In this paper we investigate the case of ambiguous shape reconstruction from two light-source photometric stereo based on illuminating the unknown Lambertian surface. So-far this problem is merely well-understood for two linearly independent light-source directions with one illumination assumed as overhead. As already established, a necessary and sufficient condition to disambiguate the entire shape reconstruction process is controlled by the satisfaction of the corresponding second-order linear PDE with constant coefficients in two independent variables. This work extends the latter to an arbitrary pair of light-source directions transforming the above constraint into a special nonlinear PDE. In addition, a similar ambiguity analysis is also performed for a special configuration of two light-source directions assumed this time as orthogonal and contained in the vertical plane. Finally, this work is supplemented by illustrative examples exploiting symbolic computation used within a framework of continuous reflectance map model (i.e. an image irradiance equation) and applied to a genuine Lambertian surfaces." @default.
- W2512208363 created "2016-09-16" @default.
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- W2512208363 date "2016-01-01" @default.
- W2512208363 modified "2023-09-27" @default.
- W2512208363 title "Orthogonal Illuminations in Two Light-Source Photometric Stereo" @default.
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- W2512208363 doi "https://doi.org/10.1007/978-3-319-45378-1_36" @default.
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