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Method for measuring and calculating total leaf area of whole arbor

A technology of leaf area and arbor, applied in the field of measuring the total leaf area of ​​the whole arbor, can solve the problems of time-consuming, cumbersome, large error, etc., and achieve the effect of convenient field operation

Pending Publication Date: 2020-01-14
深圳中绿环境集团有限公司
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Problems solved by technology

The method of obtaining plant leaf area through ground measurement is mainly based on paper weighing method, which has problems such as time-consuming, cumbersome, and large errors, especially in the manual drawing and counting of leaf outlines.

Method used

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  • Method for measuring and calculating total leaf area of whole arbor
  • Method for measuring and calculating total leaf area of whole arbor
  • Method for measuring and calculating total leaf area of whole arbor

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Embodiment 1

[0072] In a specific embodiment of the present invention, taking horse chestnut as an example, refer to Figure 1-3 , collected from the outer and inner leaves of the target tree canopy. The steps are: 1. Obtain branches (volume > 0.25 × 0.25 × 0.25m) with different orientations and heights outside the crown of the horse chestnut by high branch shears 3 ), which are 12 sample points in the upper east, upper south, upper west, upper north, middle east, middle south, middle west, middle north, lower east, lower south, lower west and lower north respectively. ×0.25m 3 ) frame, collect the leaves in the sample frame and place them in plastic bags for subsequent measurements. Sampling was carried out in four areas in the south, north, and north of the crown of the horse chestnut by high branch shears. 3 ) frame, collect the leaves in the sample frame and place them in plastic bags for subsequent measurements.

[0073] 2. Obtain relevant parameters through laser ranging. Around...

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Abstract

The invention provides a method for measuring and calculating the total leaf area of a whole arbor. The method comprises the following steps: step 1, establishing a canopy model; step 2, collecting external and internal leaves of the target canopy; step 3, measuring crown related parameters through laser ranging; step 4, acquiring a leaf scanning image and standardizing the image; step 5, calculating the leaf area of a sampling point through image processing; step 6, calculating the average leaf density of the outer layer and the inner layer of the crown; and step 7, calculating the total leafarea of the whole plant. According to the method, the leaf area is calculated by adopting Matlab computer image processing, the leaf area of a large number of samples can be quickly calculated, a laser ranging method is adopted, field operation is facilitated, the problem that the leaf area of the whole arbor cannot be effectively and quickly obtained in ground measurement is solved, and then thewhole arbor organism can be obtained through ground measurement.

Description

technical field [0001] The invention relates to the field of plant monitoring, in particular to a method for measuring and calculating the total leaf area of ​​an arbor based on laser ranging and Matlab image processing. Background technique [0002] Laser Distance Measuring (Laser Distance Measuring) is a non-contact measurement method that uses a laser as a light source for distance measurement. According to the measurement range, accuracy requirements and portability, arbors were measured with a handheld laser rangefinder. The basic formula of laser ranging is: [0003] [0004] In the formula, [0005] c - the speed of light in the atmosphere; [0006] t - the round trip time of the light wave. [0007] The phase method laser rangefinder detects the distance by detecting the phase difference between the emitted light and the reflected light when it propagates in space. The laser range finder is light in weight, small in size, easy to operate, fast and accurate, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/62
CPCG06T7/62G06T2207/10004G06T2207/30188
Inventor 王辉骆小妹王银英何娟许良禹林泽榕胡耀欢石建娅
Owner 深圳中绿环境集团有限公司
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