| We present a new method for reconstructing the exterior surface
of a complex transparent scene with inhomogeneous interior (e.g., multiple
interfaces, reflective or painted interiors, etc). Our approach involves
capturing images of the scene from one or more viewpoints while moving a
proximal light source to a 2D or 3D set of positions. This gives a 2D (or 3D)
dataset per pixel, called the scatter trace. The key idea of our approach is
that even though light transport within a transparent scene’s interior
can be exceedingly complex, the scatter trace of each pixel has a
highlyconstrained geometry that (1) reveals the contribution of direct surface
reflection, and (2) leads to a simple “scatter-trace stereo”
algorithm for computing the local geometry of the exterior surface (depth and
surface normals). We present 3D reconstruction results for a variety of scenes
that exhibit complex light transport phenomena. |
