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A method for measuring uniformity of wheat seedling emergence

A measurement method and uniformity technology, applied in image analysis, image enhancement, instruments, etc., to achieve the effects of wide coverage, high calculation efficiency, and high investigation efficiency

Active Publication Date: 2020-09-22
汉枫农业科技(泰州)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although there are many applications of UAV remote sensing in crop growth and management, there are few reports on the use of UAV remote sensing to evaluate the uniformity of wheat seedling emergence

Method used

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  • A method for measuring uniformity of wheat seedling emergence
  • A method for measuring uniformity of wheat seedling emergence
  • A method for measuring uniformity of wheat seedling emergence

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Embodiment Construction

[0032] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0033] A method for measuring uniformity of wheat seedling emergence of the present invention comprises the following steps:

[0034] Step 1) Field image acquisition: Obtain RGB images of wheat at the 3-5 leaf stage based on 5-10 meters near the ground of the drone, and the acquisition time is selected in the morning or evening when the light is relatively soft;

[0035] Step 2) vegetation extraction: Utilize formula (1) to extract the wheat seedling in the image,

[0036] Exg=2*G-R-B 1

[0037] Among them, G, R, and B are the green, red, and blue bands in the RGB image;

[0038] Step 3) Coverage extraction: The relationship between the height obtained by calibrating the UAV image with the standard version and the actual representative area of ​​each pixel is shown in the attached figure 1 As shown, according to the row spacing of ...

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Abstract

The invention relates to a method for measuring the uniformity of wheat seedling emergence, comprising the following steps: field image acquisition: based on an unmanned aerial vehicle 5-10 meters near the ground to obtain 3-5 leaf stage wheat RGB images; vegetation extraction: using a formula to extract the wheat in the image Seedlings; Coverage extraction: Divide the image into several sub-areas of 0.30m×0.30m, calculate the percentage of the pixel value of the wheat seedlings in each sub-area to the total pixel value of the image, and record it as the coverage; Calculation of uniformity: Calculation of sub-areas The variation coefficient of inter-regional coverage is used to represent the uniformity; the investigation of lack of seedlings: calculate the line-breaking area where the length of seedling deficiency in drill wheat is > 10cm, and the area of ​​seedling deficiency in sowing wheat > 0.02m 2 seedling-deficient areas. The determination method of the invention has high calculation efficiency, can quickly and comprehensively investigate the uniformity of seedling emergence in a large area, and has higher efficiency and wider coverage than manual investigation.

Description

technical field [0001] The invention specifically relates to a method for measuring the uniformity of wheat seedling emergence. Background technique [0002] The non-uniform state of wheat seedlings will cause different degrees of yield reduction. On the one hand, the local plant density is too high, which reduces the nutrient area and intensifies the contradiction between plants, which in turn affects growth and development and reduces productivity; on the other hand, the local plant density is too small, and a single plant can fully develop. , but due to insufficient utilization of soil fertility and light energy, the uniform overall production capacity cannot be achieved, resulting in different degrees of production reduction. There are many factors that affect the uniformity of wheat seedling emergence, and some issues are also current research hotspots, such as the impact of straw returning on wheat seedling emergence; and how temperature, moisture and sowing depth affe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T7/00G06T7/62
CPCG06T7/0002G06T7/62G06T2207/10024G06T2207/20021G06T2207/30188
Inventor 刘涛武威孙成明朱新开郭文善
Owner 汉枫农业科技(泰州)有限公司