A Method of Establishing the Model of Geographical Photographs Captured by Aerial Oblique

Abstract

The invention discloses a building method of a model of aviation inclined shooting geographic photos. The method comprises the steps that a virtual camera model of each photo is restored in an internal storage, photos corresponding to roughly positioned three-dimensional space coordinates are inquired, pixel homonymy points are inquired for all drawn peaks on the photos, three-dimensional space coordinates of the pixel homonymy points are obtained by back calculation, accurate three-dimensional space coordinates of the peaks are calculated by fitting, a building outline is drawn on the aviation photos, and a three-dimensional building model is generated. The building method is low in requirement for professional technical level of operators and less in operation, the whole procedure is low in production cost and short in production period, the obtained model is high in precision and good in visual effect and can highly coincide with the terrain, and the site can be effectively and really reflected.

Description

technical field [0001] The invention relates to the field of three-dimensional modeling of buildings, in particular to a method for establishing a model of geographical photos taken obliquely by aerial photography. Background technique [0002] Rapid 3D urban modeling and rural residential modeling can be widely used in emergency command, homeland security, urban management, rural residential management and other industries. Traditional manual modeling has low efficiency, high cost, and difficult work, and is only suitable for small-scale local modeling; it cannot meet the needs of large-scale urban modeling. Due to the low efficiency and time-consuming of traditional manual modeling, many industry applications with high time-sensitive requirements cannot obtain 3D model data in time, which limits the application and promotion of 3D model data to a certain extent. [0003] Tilt measurement belongs to photogrammetry, and the calculated 3D space coordinates have large errors....

AI Technical Summary

Problems solved by technology

Usually a building has thousands of vertices or tens of thousands of vertices. Whether it is building a "white model" or finding texture coordinates for vertices, it is a time-consuming operation, which leads to long production cycle and high cost of the whole process. High technical requirements for operators

On the other hand, it is difficult to accurately measure the height and related dimensions of each coordinate point for high-rise buildings, so the accuracy of the submitted model is poor, and even the dimensions deviate far from reality

If the texture picture of the model is from on-site shooting and collection, the collection time and equipment are different from the aerial 3D terrain, which will cause the model to be placed on the 3D terrain after it is built, which is seriously inconsistent with the terrain, the visual effect is poor, and it cannot be effectively reflected. real scene