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》 资源 》论文》Specularities Reduce Ambiguity of Uncalibrated Photometric Stereo

Specularities Reduce Ambiguity of Uncalibrated Photometric Stereo

2020-03-24 | |  94 |   42 |   0

Abstract

Lambertian photometric stereo with uncalibrated light di- rections and intensities determines the surface normals only up to an invertible linear transformation. We show that if ob ject refiectance is a sum of Lambertian and specular terms, the ambiguity reduces into a 2dof group of transformations (compositions of isotropic scaling, rotation around the viewing vector, and change in coordinate frame handedness).

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