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Technical method for measuring vegetation coverage and density through smart phone

A technology of smart phones and mobile phones, which is applied in the interpretation of photos, branch equipment, electrical components, etc., and can solve problems such as time-consuming and labor-intensive

Active Publication Date: 2021-07-27
BEIJING FORESTRY UNIVERSITY
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Problems solved by technology

[0004] In the forest survey work, the traditional method of measuring vegetation coverage and density needs to plan sample plots and measure them section by section, which is time-consuming and laborious.

Method used

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  • Technical method for measuring vegetation coverage and density through smart phone
  • Technical method for measuring vegetation coverage and density through smart phone
  • Technical method for measuring vegetation coverage and density through smart phone

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Embodiment Construction

[0018] A technical method for measuring vegetation coverage and density with a smart phone, the specific method is:

[0019] Take an angled shot of a piece of wooded land at a height of h from the mobile phone to the ground. Then, through the opening angle α in the vertical direction of the mobile phone camera (the angle formed by the main optical axis of the mobile phone camera and the boundary of the visible range in the vertical direction is as follows figure 1 ) and the left and right opening angle β (the angle formed by the main optical axis of the mobile phone camera and the boundary of the visible range in the horizontal direction is as follows figure 2 ) can get the sample plot area S corresponding to the photo taken by the camera, and the vegetation density N of the sample plot can be calculated according to the number n of trees on the photo. When the mobile phone is at a height h from the ground, put the mobile phone in a horizontal posture and shoot upwards, such...

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Abstract

A technical method for measuring vegetation coverage and density through a smart phone is characterized by comprising the following steps of: angular shooting is performed on a forest land at a position, which is h away from the ground, of the mobile phone; a sample plot area S corresponding to a picture shot by the camera can be obtained through a field angle alpha of the mobile phone camera in the vertical direction (the angle formed by the main optical axis of the mobile phone camera and the boundary of the visual range in the vertical direction is as shown in Figure 1) and left and right field angles beta (the angle formed by the main optical axis of the mobile phone camera and the boundary of the visual range in the horizontal direction is as shown in Figure 2); and the vegetation density N of the sample plot can be calculated according to the number n of the trees on the photo. The mobile phone is placed in a horizontal posture to shoot upwards at the position where the height of the mobile phone from the ground is h, and the vegetation coverage is obtained according to the proportion of the total crown diameter of the tree in the photo.

Description

[0001] 1. Technical field [0002] The invention relates to a technical method for measuring vegetation coverage and density with a smart phone [0003] 2. Technical Background [0004] In the forest survey work, the traditional method of measuring vegetation coverage and density needs to plan sample plots and measure them section by section, which is time-consuming and laborious. [0005] The invention utilizes the photos acquired by the smart phone, the inclination angle and the opening angle measured by the mobile phone to measure the area of ​​the sample plot, and calculates the coverage of the crown diameter by taking the photos, which is convenient and fast. [0006] 3. Contents of the invention [0007] A technical method for measuring vegetation coverage and density with a smart phone, characterized in that a piece of woodland is photographed at an angle at a height h of the mobile phone from the ground, and then the vertical angle α of the mobile phone camera (the mai...

Claims

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Application Information

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IPC IPC(8): G01C11/12H04M1/72403
CPCG01C11/12
Inventor 冯仲科苏珏颖练一宁
Owner BEIJING FORESTRY UNIVERSITY
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