A soil and vegetation mixed spectrum measurement method and simulation system
A hybrid spectrum and measurement method technology, applied in the field of ecological environment monitoring, can solve problems such as the inability to quickly and efficiently obtain mixed spectra, the lack of simulation systems for different ground components, and many input parameters, so as to achieve clear physical meaning and universal characteristics , easy to operate, less input parameters
Active Publication Date: 2016-03-16
PEKING UNIV
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Problems solved by technology
The linear model is simple and clear, but it ignores the interaction of ground object components, and there is a certain gap with the real mixed spectrum, while other spectral mixed models have problems such as many input parameters, difficult calculation, and small application range.
[0005] In addition, in the measurement and research of mixed spectra, there is a lack of simulation systems for different ground object components, and it is impossible to quickly and efficiently obtain mixed spectra of various component ratios
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[0044] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0045] The following examples facilitate a better understanding of the present invention, but do not limit the present invention. The experimental methods in the following examples are conventional methods unless otherwise specified. The test materials used in the following examples, unless otherwise specified, were purchased from conventional biochemical reagent stores.
[0046] (1) Selection of measurement targets: In order to improve the maneuverability and reduce the multiple scattering effect of vegetation between canopies, the vegetation components in the mixed ground cover were artificially planted tall fescue with a pruning height of 4cm as the research object, and the soil group Sorted from the brown soil in Jingyuan lawn area of Peking University.
[0047] (2) Preparation of measurement target: prepare two 0.36m*2m artificially ...
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The invention discloses a soil and vegetation mixed spectrum measurement method and a simulation system. The system comprises a field spectrograph, an observation zone and a computer processing unit, wherein the field spectrograph is used for observing the DN (digital number) values of a soil and vegetation mixed sample and a reference plate in the observation zone so as to obtain the DN value of the reference plate and the DN value of a mixed pixel spectrograph; the field spectrograph is connected with the computer processing unit through a data line, and calculates the actual reflection rate R of the observation zone according to the DN value of the reference plate and the DN value of the mixed pixel spectrum at different soil and vegetation proportions; the established spectrum mixed model is verified or improved by utilizing the actual reflection rate R of the observation zone, and finally, the spectrum of different soil and vegetation mixed proportions is calculated by utilizing the determined spectrum mixed model. According to the soil and vegetation mixed spectrum measurement method and the simulation system disclosed by the invention, the mixed spectrum research from qualitative to quantitative research development is promoted; the mixed pixel spectrum inversion accuracy is improved; the soil and vegetation mixed spectrum measurement method and the simulation system has important guidance and demonstration significance to the soil and vegetation spectrum inversion at different cover degree conditions.
Description
technical field [0001] The invention relates to a soil and vegetation mixed spectrum measurement method and a simulation system, which belong to the technical field of ecological environment monitoring. Background technique [0002] The spectral feature analysis of typical ground objects is not only an important content of remote sensing theory research, but also an important basis for remote sensing application research. The spectra of different ground features can reflect their unique properties, and the mixed spectra of multiple ground features will show specific rules. Vegetation and soil are the two most widely studied ground features in the field of remote sensing. The study of their mixed spectrum can not only provide theoretical support for exploring mixed pixel decomposition methods, but also help to improve the monitoring accuracy of the distribution type of ground features. At the same time, the research on the spectral characteristics of mixed surface objects al...
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IPC IPC(8): G01N21/25
Inventor 秦其明孟庆野
Owner PEKING UNIV
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