Rapid building height obtaining method based on parameter-free high-resolution image

Abstract

The invention provides a rapid building height extraction method based on a parameter-free image. According to the method, on the condition that parameters can be taken in with no image, a single image is utilized for calculating and obtaining the target building height. The rapid building height extraction method mainly comprises the steps of obtaining an image of a region to be extracted and known building height data inside the region to be extracted, preprocessing the obtained image, estimating the extraction difficulty of multiple feature lines of a target building, selecting the feature line of the lowest difficulty, extracting the selected feature line from the image, calculating taken-in parameters of the image, and calculating the height of the target building. According to the rapid building height extraction method, the adopted image is easy to obtain, the operability of building height extraction on the single image is greatly improved through comprehensive quantity calculation, the problems that no relative parameters exist when high-resolution image for calculating the building height is solved, and the better application potentiality is achieved on the aspects of urban planning and management, land management, digital city construction, disaster prevention and reduction and the like.

Description

technical field [0001] The invention relates to the field of measurement, in particular to a method for rapidly extracting the height of urban buildings based on a parameterless image. Background technique [0002] In the fields of urban construction and land management, it is necessary to master the height information of urban buildings for planning, design, monitoring and evaluation. In the work of urban disaster prevention and mitigation, and post-disaster assessment, the extraction of disaster characteristics, the assessment of the scale of disaster and the number of victims all need to use building height information. In the process of urban land management, the monitoring of building height is conducive to the rational use of urban land and the protection of the legal property rights of other stakeholders such as the government and the masses. In the process of urban planning, design, evaluation and digital city construction, the acquisition of urban building height i...

AI Technical Summary

Problems solved by technology

[0006] In addition, the existing building height extraction methods are all based on satellite images. When performing height extraction, the operating parameters of the satellite and the current solar altitude and azimuth angles need to be known in advance.

In reality, images of cities may come from various sources, such as aerial images of airplanes or hot air balloons, satellite maps from the Internet, etc. In this case, it may not be possible to know the specific parameters of satellites or other capture devices at the time of shooting, but At present, there is no method that can extract the building height in the image without parameters

Therefore, the current method of height extraction based on a single image is also limited to a large extent

Images