Locating straight-line edge segments on outdoor scenes

摘要

Straight-line edge segments are often used as key features in building scene models. This paper presents techniques for extracting edge segments from a digital picture. First, an edge detection is performed on the entire picture to obtain a list of edge elements. Second, these edge elements are parametrically transformed. Third, using this parametric representation, the edge elements are divided into several groups. Each group consists of edge elements which lie on a contiguous portion of a straight line. The line segments extracted are represented by the positions of their two end points. Results of line extraction on a few outdoor scenes are also presented.