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A Calculation Method of Canopy Reflectance of Coniferous Vegetation

A calculation method and technology of vegetation canopy, applied in the field of vegetation parameter inversion

Active Publication Date: 2018-02-27
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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Problems solved by technology

[0006] The technical problem solved by the present invention is, aiming at the problem of inverting the parameters of coniferous vegetation in a continuous large area and the problem of simplifying the model parameters and calculation process, the present invention proposes a coniferous leaf LIBERTY model and canopy radiation transfer model SAIL The coupling model of the model, which simulates the reflectance and transmittance of a single coniferous leaf and takes it as the input parameter of the coniferous canopy model, and finally simulates the reflectance of the continuous coniferous canopy

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  • A Calculation Method of Canopy Reflectance of Coniferous Vegetation

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[0215] The present invention will be further described below in conjunction with the accompanying drawings.

[0216] The invention proposes a coupling model of a conifer leaf model and a canopy radiation transfer model SAIL model. The model first classifies the given parameters into three parts: leaf parameters, canopy parameters and soil parameters, and then calculates the transmittance and absorptivity of a single needle cell through analysis, and then uses the layering theory to derive the given structure Spectral information of coniferous leaves under the parameters; at the same time, for the canopy parameters, the leaf type distribution elements are first calculated by using the given leaf inclination distribution model parameters, and then the extinction coefficient and scattering coefficient of the canopy model are calculated by combining the calculated geometric elements and combined with Combining the leaf shape distribution model, a complete set of canopy parameters ...

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Abstract

The invention discloses an aciculignosa canopy reflectivity calculation method. The method comprises the steps of S1, recognizing a parameter, wherein a model parameter is input, and the input parameter is preliminarily divided into three types, namely, a leaf parameter, a soil parameter and a canopy parameter; S2, inputting the leaf parameter in the step 1 into a LIBERTY model to conduct single leaf spectral information simulation to obtain the reflectivity and transmittance of an aciculignosa leaf; S3, according to the soil parameter and the canopy parameter in the step 1 and the reflectivity and transmittance of the spectrum of the single leaf, calculating an extinction coefficient and a scattering coefficient, and further calculating to obtain a parameter of the SALI model; S4, inputting the parameter obtained by calculation in the steps 3 into the SALI model, and calculating the related reflection factor and reflectivity of a canopy; S5, according to the reflection factor and the reflectivity in the step 4, calculating the reflectivity of the canopy. The aciculignosa canopy reflectivity calculation method is applicable to continuous aciculignosa canopy parameter inversion.

Description

technical field [0001] The invention relates to a method for inversion of vegetation parameters, in particular to a method for inversion of parameters of coniferous vegetation by using a physical radiation model. Background technique [0002] Quantitative remote sensing is more and more widely used in vegetation inversion, which is of great significance for efficient management of vegetation physiological parameter information, forest fire early warning, and crop cultivation. In recent years, the physical inversion model has become a vegetation parameter inversion model of domestic and foreign hot research because of its strong stability and portability. Among them, the method of using the physical coupling model of the leaf model and the canopy model to invert the content of the biochemical components of the entire canopy is a hot idea. The physical model of the leaf considers the physical mechanism of the interaction between light and the leaf and the structure of the lea...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50G06N5/04G01N21/25
CPCG01N21/25G06F30/20G06N5/042
Inventor 郭云开朱佳明蒋明钱佳李丹娜朱善宽
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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