Method for determining optimal band realizing spectrum response of dominated salt in saline soil

A technology of optimal band and spectral response, applied in the field of spectroscopic analysis, can solve the problems of large amount of data and low efficiency in the optimal band, and achieve the effect of simple determination, fewer bands, and narrow band range.

Inactive Publication Date: 2014-06-18
SHANGHAI JIAO TONG UNIV
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Problems solved by technology

[0008] In view of the above-mentioned defects in the prior art, the technical problem to be solved by the present invention is to provide a method that can quickly and accurately determine the optimal band of the saline soil dominant salt spectral response, to solve the problem of the huge amount of data in the optimal band within the entire band. , the problem of low efficiency

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  • Method for determining optimal band realizing spectrum response of dominated salt in saline soil
  • Method for determining optimal band realizing spectrum response of dominated salt in saline soil
  • Method for determining optimal band realizing spectrum response of dominated salt in saline soil

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Embodiment Construction

[0032] This embodiment provides a method for determining the optimal band of saline soil dominant salt spectral response, and the specific steps are as follows:

[0033] a) detecting a plurality of saline soil samples by a spectrometer having a specific sampling interval, thereby obtaining a plurality of spectral curves corresponding to the plurality of saline soil samples, each spectral curve having a plurality of first bands, optionally , the wavelength range of the spectrometer is greater than or equal to 300nm and less than 1700nm, the sampling interval of the visible light band is less than or equal to 2nm, the sampling interval of the near-infrared band is less than or equal to 4nm, and the number of saline soil samples is not less than 30;

[0034] b) Segmenting the first bands of each spectral curve at a specific wavelength to obtain a plurality of second bands, optionally, the specific wavelength is 30nm, 20nm, 10nm or 5nm;

[0035] c) Correlation analysis is performe...

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Abstract

The invention discloses a method for determining an optimal band realizing spectrum response of dominated salt in saline soil. The method comprises the following steps: detecting a saline soil sample by an optical spectrum instrument with a specific sampling interval, so as to obtain a spectrum curve; segmenting the spectrum curve by the specific wavelength, carrying out correlation analysis on the reflectivity and the dominated salt content in each band; selecting the wave band with a correlation coefficient being greater than a set value as a primary strip, and averaging the reflectivity; drawing a scatter diagram of the average value and the dominated salt content; fitting and selecting the wave band determining the maximal coefficient as a secondary strip; carrying out correlation analysis according to the original sampling interval; determining a tertiary strip according to the correlation coefficient; averaging the reflectivity in the tertiary strip, and caring out correlation analysis; and selecting a significant wave band with the correlation coefficient being greater than the set value as the optimal band of the salinized soil sample. The method for determining the optimal band disclosed by the invention has the advantages that wave band quality is small, the range is narrow, the method is accurate based on full-wave band, and the like.

Description

technical field [0001] The invention relates to the field of spectroscopic analysis, in particular to a method for determining the optimal band of saline soil dominant salt spectral response. Background technique [0002] In today's increasingly scarce land resources, salinized land as a potential land resource is a hot spot that governments and scientists pay attention to. With its advantages of fast, convenient, non-contact and non-destructive acquisition of ground object information, hyperspectral technology has become an effective tool for effectively detecting saline soil. However, using hyperspectral data to quantitatively and semi-quantitatively map soil salinization, ground spectral measurement data and the determination of the best band of spectral response have become an indispensable and important basis. [0003] The optimal band of spectral response means that the spectral information contained in this band range can be used to characterize ground features, and ...

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Application Information

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IPC IPC(8): G01N21/25
Inventor 申广荣马创王紫君周培支月娥
Owner SHANGHAI JIAO TONG UNIV
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