| 摘要 |
Single-shot photometric stereo techniques are disclosed in which chromaticity is assumed to be a variable. Scene illumination includes three or more spectrally distinct light sources. A scene image is taken with a camera system configured to measure five or more different bands, or channels, of the visible light spectrum. The light sources can include narrow-band colored LED lights, possibly combined with color filters to refine the spectral distributions. In each configuration, a beam splitter assembly is used to align two or more color cameras having different color filters placed over their lenses. By use of such techniques, a single multispectral photograph of a subject provides enough information to recover both the full-color reflectance and the surface normals on a per-pixel basis. |
