Determination method of crop yield boundary in high water table subsidence area based on UAV image

Abstract

The invention provides an unmanned aerial vehicle image-based high-phreatic water level subsidence area crop failure boundary determination method, and belongs to the fields of surveying and mapping technologies, land utilization and land reclamation. The method comprises the steps of determining the working range of a subsidence area; acquiring a working range image by using an unmanned aerial vehicle and processing to obtain a digital surface model (DSM) of the working range of the subsidence area; and performing elevation threshold segmentation on the DSM by adopting an improved Otsu algorithm to obtain a binary image corresponding to the DSM, performing edge detection processing on the binary image to obtain a preliminary crop failure boundary, and performing further connection and smoothing processing to obtain a final crop failure boundary line in the working range of the subsidence area. According to the present invention, the field surveying and mapping workload is reduced, andthe working efficiency is greatly improved; the remote sensing images are visual, disputes are reduced, technical support is provided for mining area coal mining subsidence cultivated land loss assessment and compensation, and a guarantee is provided for the later land reclamation.

Description

technical field [0001] The invention belongs to the fields of surveying and mapping technology, land utilization and land reclamation, and in particular proposes a method for determining the yield boundary of crops in high water level subsidence areas based on drone images. Background technique [0002] Coal resources, as the main energy component of our country, have played a pivotal role in the realization of our country's economic development and industrialization process. About 85% of my country's coal mining is underground mining, which will cause the rocks in the upper part of the underground goaf to fall under the action of gravity and stress, causing cracks and subsidence on the surface, forming a coal mining subsidence area. [0003] As the basic growth environment of crops, the subsidence of cultivated land will inevitably affect the growth of crops. The spatial distribution of my country's coal resources and cultivated land resources has a high degree of overlap....

AI Technical Summary

Problems solved by technology

Because the degree of land damage is difficult to describe quantitatively, and the degree of crop production reduction and compensation level do not have specific standards, it is currently impossible to verify the quantity from the amount of cultivated land and make changes based on the facts, resulting in the fact that the actual land is water surface and the cadastral account book is cultivated land. Therefore, the scientific determination of crop yield boundaries can provide technical support for the reduction of cultivated land and the determination of the compensation area for young crops

Traditional crop yield boundaries are mostly determined by field surveys and field measurements by operators, which consumes a lot of manpower and material resources, is easily disturbed by human factors, lacks time-sensitive evidence, and has poor accuracy

Satellite remote sensing has disadvantages such as high shooting cost, long operation cycle, and severe constraints of meteorological conditions. The development of UAV technology is a powerful supplement

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