A 3D modeling system for single-camera oblique photography

Abstract

The present invention relates to the technical field of surveying and mapping and particularly relates to a single-camera oblique photography three-dimensional modeling system. The system comprises a UAV and a ground station. The UAV comprises a single camera acquisition module, an attitude position information module, and a flight control execution module. The ground station comprises a flight control module, a three-dimensional data analysis and processing module, and a real three-dimensional database module. Through arranging the single camera acquisition module and the flight control execution module on the UAV and arranging the flight control module, the three-dimensional data analysis and processing module and the real three-dimensional database module on the ground station, an aerial photography path is optimized specially, the data collection of multi-angle aerial photographs and 3D reconstruction can be carried out through a single camera, and the problem that an existing 3D model modeling tool can not process UAV low-altitude aerial photograph data (a small frame size, an unstable posture, and a large amount of data) well and the component of manual intervention in the processing process influences data processing efficiency is overcome.

Description

technical field [0001] The invention relates to the technical field of surveying and mapping, in particular to a single-camera oblique photography three-dimensional modeling system. Background technique [0002] UAV systems can be classified into four categories: miniature, light, small, and large, according to their weight; they can be divided into oil-powered and electric according to their power source; they can be divided into rotorcraft, fixed-wing, and orthopter And so on three categories. The micro UAV involved in this method refers to a fixed-wing electric UAV whose weight is not more than 5kg. The body material is mainly EPO (expanded polyethylene, styrene mixture) and carbon fiber. It is a UAV that conducts route planning and collects images in the air with a certain degree of overlap and orthographic and oblique photography. [0003] Chinese patent application number: 201310404384.9 titled light and small drone airborne multi-view stereo aerial remote sensing de...

AI Technical Summary

Problems solved by technology

[0005] Due to the fact that the existing UAV tilt photography system is equipped with multiple cameras, the load of the UAV is greatly increased, which limits the portability and flexibility of the UAV operation, and at the same time reduces the endurance time and operating efficiency of the UAV.

Existing 3D model modeling tools are mainly for the automatic extraction of building monomers and vegetation models for the data acquired by large aerial cameras, but they are not very good for low-altitude aerial photography data of UAVs (small image size, unstable posture, etc.) , a large amount of data) for processing, and there are manual intervention components in the processing process, which affects the efficiency of data processing

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