Abstract
Three-dimensional (3D) building façade model reconstruction is of great significance in urban applications and real-world visualization. This paper presents a newly developed method for automatically generating a 3D regular building façade model from the photogrammetric mesh model. To this end, the contour is tracked on irregular triangulation, and then the local contour tree method based on the topological relationship is employed to represent the topological structure of the photogrammetric mesh model. Subsequently, the segmented contour groups are found by analyzing the topological relationship of the contours, and the original mesh model is divided into various components from bottom to top through the iteration process. After that, each component is iteratively and robustly abstracted into cuboids. Finally, the parameters of each cuboid are adjusted to be close to the original mesh model, and a lightweight polygonal mesh model is taken from the adjusted cuboid. Typical buildings and a whole scene of photogrammetric mesh models are exploited to assess the proposed method quantitatively and qualitatively. The obtained results reveal that the proposed method can derive a regular façade model from a photogrammetric mesh model with a certain accuracy.
Highlights
A number of researchers have tried on theautomatic reconstruction of façade models for generating LoD3 building models [4]
To clarify the reconstruction process better, we present the cuboids before the global fitting of model parameters at each level
This paper presents a method for automatically generating a 3D regular building façade model from a photogrammetric mesh model
Summary
A number of researchers have tried on the (semi-)automatic reconstruction of façade models for generating LoD3 building models [4]. Images and LiDAR (Light Detection and Ranging) point clouds are two common data used for façade model reconstruction. Several methodologies aiming at the automatic reconstruction of 3D façade models have been established in the past years. Xiao et al [5] proposed a semi-automatic method to generate façade models along a street from multi-view street images. For this purpose, an ortho-rectified image was initially decomposed and structured into a directed acyclic graph of rectilinear elementary patches by considering architectural bilateral symmetry and repetitive patterns. Müller et al [6]
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