3d Surface Reconstruction from Horizons

In this paper we present a general solution to the problem of 3D reconstruction from the analysis of luminance edges, which takes into account possible viewer-dependent characteristics of such contours. The method first proceeds by matching contours in a loose fashion, so that both sharp edges and horizons are included. Classical stereometric methods allow us to detect sharp edges and rule out all matches that include any such edges. Among the remaining matches we then identify those that can be classified as horizon contours and estimate the 3D coordinates of the three visible rims through an entirely geometrical procedure.