Method and device for measuring index number of canopy vegetation of crops

A vegetation index and crop canopy technology, applied in the fields of plant growth and nutrition diagnosis, image processing, and spectral analysis, can solve the problems of high cost and complex methods of multi-spectral cameras, and achieve simple methods, reduce the number of CCDs, and reduce costs. Effect

Inactive Publication Date: 2010-09-22
CHINA AGRI UNIV
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[0005] The invention provides a method and device for measuring crop canopy vegetation index, which ar

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  • Method and device for measuring index number of canopy vegetation of crops
  • Method and device for measuring index number of canopy vegetation of crops
  • Method and device for measuring index number of canopy vegetation of crops

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[0029] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0030] Such as figure 1 Shown is the flow chart of crop canopy vegetation index measuring method of the present invention, comprises:

[0031] Step 101 , using a visible light CCD and a NIR-CCD to acquire a visible light image and a NIR grayscale image of the target crop canopy.

[0032] Step 102, extracting the red (R), green (G) and blue (B) c...

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Abstract

The invention provides a method and a device for measuring the index number of canopy vegetation of crops. The method comprises the following steps of: acquiring visible images and near-infrared (NIR) grayscale images of canopies of target crops, extracting red, green and blue components in the visible images, and performing grayscale respectively on the red, green and blue components in the visible images to acquire grayscale images of the red, green and blue components respectively; according to conversion coefficients acquired in advance, calculating the spectral reflectivity of each pixel point in the grayscale images of the red, green and blue components and the spectral reflectivity of each pixel point in the NIR grayscale images; and according to the spectral reflectivity of each pixel point in the grayscale images of the red, green and blue components and the spectral reflectivity of each pixel point in the near-infrared grayscale images, calculating the index number of the canopy vegetation of the target crops. In the method and the device for measuring the index number of the canopy vegetation of the crops, two charge coupled devices (CCDs) are adopted to acquire the visible images and the NIR images so as to reduce the cost; and the method is simple.

Description

technical field [0001] Embodiments of the present invention relate to the technical fields of spectral analysis, plant growth and nutritional diagnosis, and image processing, and in particular to a method and device for measuring crop canopy vegetation index. Background technique [0002] Information such as plant growth and nutrition can be reflected in the spectral characteristic parameters. Using image analysis technology, the spectral characteristic parameters of canopy leaves can be extracted from crop canopy images, and the chlorophyll content or nitrogen content of canopy leaves can be detected to judge Plant growth and nutritional status. Crop canopy vegetation index can include normalized difference vegetation index (Normal Differential VegetationIndex, referred to as NDVI), G / R, G / R+G+B, etc., wherein G / R is the light of green light and red light in visible light Intensity ratio, G / R+G+B is the light intensity ratio of green light and red, green and blue. These s...

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Application Information

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IPC IPC(8): G01S17/00G01S7/48G06T7/40
CPCG06K9/00657G06V20/188
Inventor 李民赞赵瑞娇邓小蕾张泽张彦娥郑立华孙红李修华
Owner CHINA AGRI UNIV
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