A three-dimensional reconstruction method and system of multiple buildings

Abstract

The present invention provides a three-dimensional reconstruction method and system for multiple buildings. The method includes: inputting the aerial image set one into the neural network model to identify the minimum circumscribed rectangle of the building to be identified in the aerial image set one, and according to the aerial image set The shooting parameters of the first are used to calculate the outer expansion distance required for the minimum circumscribed rectangle; the shooting parameters of the aerial image set two are input into the preset height calculation formula to calculate the building height of the buildings to be identified in the aerial image set two ; According to the expansion distance and the height of the building, the flight trajectory is set for the aerial photography equipment; the aerial photography equipment collects data according to the flight trajectory of the building to be identified, so as to obtain the aerial photography image set 3 containing position information, and process the aerial photography image collection 3 to obtain The 3D model of the building to be identified. Beneficial effects: the flight trajectory obtained through simple formula planning is used for data collection, and the modeling accuracy is improved.

Description

technical field [0001] The invention relates to the technical field of data processing, in particular to a multi-building three-dimensional reconstruction method and system. Background technique [0002] Scene modeling has become a core part of navigation, simulation and virtual reality applications. Although it is possible to obtain detailed models using interactive software, it is not suitable for large-scale urban scenes. With the rapid development of aerial photography equipment technology in recent years, some aerial photography equipment has low manufacturing and use costs, strong mobility, and can be used on many occasions. These characteristics make it possible to reconstruct outdoor buildings by using aerial photography equipment to collect photos. [0003] At present, the traditional method of using aerial photography equipment to obliquely photograph outdoor buildings specifically includes: by carrying multiple sensors on the same aerial photography equipment, a...

AI Technical Summary

Problems solved by technology

[0005] First, the images of outdoor buildings are collected in a well-shaped shape, which makes the collected images not comprehensive and uniform, resulting in incomplete models obtained after 3D modeling;

[0006] Second, because the images of outdoor buildings are collected from five different angles, including one vertical and four oblique angles, the existing technology needs to collect a large number of images, which cannot be simply collected

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