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Plant canopy information spectrum detection method based on background removal

A technology for spectral detection and background elimination, which is applied in color/spectral characteristic measurement, measuring devices, and material analysis through optical means, can solve problems such as low accuracy and large errors, and achieve simple operation, easy implementation, and improved detection The effect of precision

Inactive Publication Date: 2012-12-26
ZHEJIANG UNIV
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The invention provides a method for detecting the spectrum of plant canopy information based on background elimination, which solves the problems of large errors and low accuracy of the method for detecting the spectrum of plant canopy information caused by the soil background

Method used

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  • Plant canopy information spectrum detection method based on background removal
  • Plant canopy information spectrum detection method based on background removal

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Experimental program
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Effect test

Embodiment 1～10

[0025] Select 10 plants to be tested with different canopy structures, and perform the following operations on each plant to be tested:

[0026] (1) Use a near-infrared broadband filter with a wavelength range of 780 to 950nm and a red light filter with a wavelength of 650nm to obtain the near-infrared light and red light reflections of the plants to be tested under the same light intensity sunlight radiation Rate;

[0027] (2) According to the formula Obtain the correction coefficient; among them, K is the correction coefficient, R I is the reflectance of near-infrared light, R R is the reflectance of red light;

[0028] (3) Utilize the plant canopy information spectrum detector (TOP-2000) to obtain the actual detection value of chlorophyll of the plant to be tested;

[0029] (4) According to the formula Y s =aKY v , to get the corrected chlorophyll detection value; where, Y s is the corrected chlorophyll detection value, Y v is the actual detected value of chlorophy...

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Abstract

The invention discloses a plant canopy information spectrum detection method based on background removal. The method comprises the following steps of (1) using a near-infrared broad band pass filter with a wavelength coverage of 780-950nm and a red light optical filter in a wavelength of 650nm to obtain reflectivity of near-infrared light and red light of a plant to be measured under sunlight radiation with same light intensity; (2) obtaining a correction factor according to a formula, wherein K is the correction factor, R1 is the reflectivity of the near-infrared light, and RR is the reflectivity of the red light; (3) obtaining an actual detection value of the plant to be measured through a plant canopy information spectrum detection device; and (4) obtaining a corrected detection value according to a formula of Ys=KYv, wherein the Ys is the corrected detection value, and the Yv is the actual detection value. With the adoption of the plant canopy information spectrum detection method, detection accuracy is greatly improved; and the plant canopy information spectrum detection method is simple and convenient to operate and easy to achieve.

Description

technical field [0001] The invention belongs to the field of plant nutrition detection, and in particular relates to a method for spectral detection of plant canopy information based on background elimination. Background technique [0002] The non-destructive testing of plant leaf physiological indicators mainly refers to the determination of chlorophyll, nitrogen, water, etc., which can be used to detect the growth and health status of plants in real time, and analyze the water and fertility status. Through testing, not only can the fertilizer and The supply of water can realize precise fertilization, save resources, reduce environmental pollution, and can scientifically guide the cultivation work, so as to ensure the healthy growth and good development of cultivated plants and increase crop yield. [0003] At present, the non-destructive testing methods of leaves include image method and spectroscopic method. The image is mainly some static or dynamic image features of pl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/35G01N21/31G01N21/359
Inventor 吴迪聂鹏程何勇李晓丽
Owner ZHEJIANG UNIV