Method for estimating invasive plant biomass by aerial photography of unmanned aerial vehicle

Abstract

The invention discloses a method for estimating invasive plant biomass by aerial photography of an unmanned aerial vehicle. The method comprises the steps that images of a to-be-estimated area are continuously shot by the unmanned aerial vehicle, meanwhile on-the-spot collection of invasive plant biomass samples in the to-be-estimated area is conducted and the biomass is calculated; the images ofthe to-be-estimated area are processed to obtain ground ortho images of the to-be-estimated area with high definition, and therefore plant community height variation model images and visible light vegetation index model images of the surface of the to-be-estimated area are established; classification is conducted on the ground ortho images of the to-be-estimated area to determine space distribution of invasive plants; regression models between the plant biomass and plant community height and between the plant biomass and visible light vegetation index are established, and estimation of the invasive plant biomass with determined space distribution is conducted through the regression models. According to the method, the biomass and the space distribution of the invasive plants can be rapidlyestimated, working efficiency and quality are greatly improved, and the method is more accurately and lower in cost.

Description

technical field [0001] The invention relates to a technique for estimating the biomass of invasive plants in the investigation of natural resources, in particular to a method for estimating the biomass of invasive plants through unmanned aerial vehicle photography. Background technique [0002] Biological invasion is considered to be the second largest cause of global biodiversity loss, and has caused serious harm to the local ecological environment, economy, and human health. How to effectively prevent and control invasive species is a major concern at present. The population expansion of invasive species in new locations may show exponential expansion. According to the principle of "early detection and early eradication", early warning of invasive species is a key step in the prevention and control work. Its specific content includes: quickly identify potential invasive species or invasive species that have already invaded but are locally distributed, and evaluate the pos...

AI Technical Summary

Problems solved by technology

The two methods have their own advantages and disadvantages. The first method can clearly distinguish the difference between invasive plants and other plants, and the survey results are relatively accurate, but it is time-consuming and laborious, and the labor cost is high; the second method is relatively simple and takes less time to investigate. The labor cost is low, but the image resolution of the monitoring of invasive plants is poor, and the survey results have large errors

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