摘要：A building can be reconstructed from its roof, which can be defined by some parameters like orientation, height, ridges and contours. In many models for building extraction, using Laser scanner raw data, plants are requested to accomplish the precise location of building contours. The purpose of this study is to present a method for building reconstruction using Laser scanner data. For this, the 2D Hough transform is applied to the Laser data, represented as a raster image, to find the borders of the roof. Then, the planes that model the roof are estimated and the form of the roof is derived. The method proved to be efficient in building modeling. In the pre-processing step, the Hough transform and thinning were used to estimate the borders of the buildings. The method to find the planes of the roof is effective and consists of looking for three points that define each plane of the roof. The ridge lines are got by intersecting these planes.
其他摘要：A building can be reconstructed from its roof, which can be defined by someparameters like orientation, height, ridges and contours. In many models forbuilding extraction, using Laser scanner raw data, plants are requested to accomplish the precise location of building contours. The purpose of this study is topresent a method for building reconstruction using Laser scanner data. For this, the2D Hough transform is applied to the Laser data, represented as a raster image, tofind the borders of the roof. Then, the planes that model the roof are estimated andthe form of the roof is derived. The method proved to be efficient in buildingmodeling. In the pre-processing step, the Hough transform and thinning were usedto estimate the borders of the buildings. The method to find the planes of the roof iseffective and consists of looking for three points that define each plane of the roof.The ridge lines are got by intersecting these planes.
关键词：Reconstrução 3D de edificações;Laser scanner aerotransportado;3D reconstruction of building;Laser Sacanner data airborne
