An Image-Based Approach for 3D Reconstruction of Urban Scenes Using Architectural Symmetries
Natesh Srinivasan, Frank Dellaert · 2018
We present an approach to exploit complex 3D symmetries exhibited by urban structures in order to improve 3D reconstruction be used, ranging from primitive symmetries [18] to complex symmetry groups. We achieve this by rigorously modeling complex symmetries, using the mathematical theory underlying them to develop generative models of 3D points involved in a given scene symmetry. A key element of our approach is to express the 3D structure of a symmetric scene, imaged by a camera, as comprised of non-decomposable 3D elements known as asymmetric units. We apply our approach in both single and multi-view settings and show that we can obtain denser, more compressed, and qualitatively better-looking representations of the observed structure by exploiting constraints derived from symmetry.