3D shape reconstruction using projection onto electronic light diffusing layers

摘要

3D shape reconstruction of objects including specular objects in which structured light patterns are projected onto multiple layers of EGlass arranged in spaced-apart relation with each other while each layer is in turn controlled to be in the diffuse mode with all others being in the transparent mode, so as to illuminate the object by the patterns projected onto the layers. Images are captured of the structured light pattern as reflected by the mirror-like surface of the specular object. By projecting multiple different patterns, such as multiple different Gray code patterns, and by sequencing through each EGlass layer for each pattern, the 3D shape of the entirety of the visible surface of the object can be reconstructed by analysis of captured images of the distorted reflections of the patterns by the surface of the object. Embodiments are also described which can be used without reconfiguration for surface reconstruction of the shape of diffuse objects.