Method used for avoiding overhigh local overlapping degree of unmanned aerial vehicle images of zones with large altitude fluctuating

Abstract

The invention relates to a method used for avoiding overhigh local overlapping degree of unmanned aerial vehicle images of zones with large altitude fluctuating, and belongs to the technical field of remote sensing image processing. According to the method, under the assist of POS data, topographic reference data is obtained via cutting, the overlapping degree among images is calculated, intelligent analysis is adopted, and automatic processing of the overhigh local overlapping degree of unmanned aerial vehicle images of zones with large altitude fluctuating is completed. The method is capable of removing excess redundant images with ensuring the overlapping degrees of all images are higher than a minimum threshold value under simple parameter assignment. Simplifying of original data is capable of accelerating subsequent DOM manufacturing efficiency. The method is simple in parameter assignment, and is capable of increasing DOM manufacturing efficiency without reducing DOM manufacturing precision.

Description

technical field [0001] The invention belongs to the technical field of remote sensing image processing, and in particular relates to a method for processing excessive partial overlap of unmanned aerial vehicle images in survey areas with large altitude fluctuations. Background technique [0002] UAV aerial photography technology is a new digital surveying and mapping aerial photography technology after traditional aerial photography. Compared with traditional aerial photogrammetry, UAV aerial photography has the advantages of flexible take-off and landing, less affected by weather, and low cost. features. At present, the orthophoto map (DOM) and digital line map (DLG) produced by low-altitude digital remote sensing image technology can meet the accuracy requirements of 1:5000, 1:2000 and 1:1000 scales. [0003] The POS system, also known as the IMU / DGPS system, can measure the position and attitude of the sensor in real time during the imaging process, and obtain the extern...

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Problems solved by technology

[0005] The purpose of the present invention is to solve the deficiencies in the prior art, and provide a method for processing the local overlap of UAV images in the survey area with large altitude fluctuations. The method adopts free global DEM data as auxiliary terrain data. Simple parameter specification is required, and the most redundant images can be eliminated while ensuring that the overlap of all images is higher than the minimum limit, and the automatic detection of excessive local overlap of UAV images in survey areas with large altitude fluctuations is realized. deal with

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