Device for the acquisition of a stereoscopy image pair

摘要

A stereophotogrammetry device intended to reduce the 3D surface reconstruction artifacts due to specular reflections when a unique camera body is used. Indeed, specular reflection of the camera flash on shiny objects are creating virtual objects in the scene inducing spikes in reconstruction. The device is constituted of a computing unit (C) enabling 3D reconstruction, a unique camera body (5) equipped with a non-polarized double-optics (OA) and (OB) and two light sources (2A) and (2B) separated by the same distance as the double-optics and aligned with these such that (2A) is aligned with (OA) and (2B) is aligned with (OB) relative to the subject (S). According to geometry considerations, the computing unit (C) is defining the best matching amongst four possible matches relative to the specular spot position.

主权项

1. A stereophotogrammetry device for 3D surface reconstruction from a pair of images comprising:
a computing unit (C) enabling three dimensional surfaces reconstruction by matching corresponding points between each of the two images of a stereo pair; and a unique camera body (5) equipped with a system of non-polarized double optics (OA) and (OB) and of two separated light sources (2A) and (2B) being separated of the same distance as the double optics and aligned with this double optics in such a way that (2A) is aligned with (OA) and (2B) is aligned with (OB) relative to subject (S), wherein the computing unit (C) is enabling to determine amongst the 4 possible pairing for the reconstruction of a specular spot the geometric position which is the closest to the device in the case of a convex surface and to the farthest to the device for a concave surface.