Laser and image-based leaf area measurement device

A technology for measuring device and leaf area, which is applied in the direction of measuring device, using optical device, line-of-sight measurement, etc., can solve the problems of strict requirements for reference objects, lack of flexibility and practicability, and high measurement accuracy, and achieves overcoming complex equipment and convenience. In vivo measurement, easy to carry effect

CN101979960AInactive Publication Date: 2011-02-23NANJING UNIV OF INFORMATION SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2011-02-23
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a laser and image-based leaf area measurement device, which comprises a digital camera, a leaf clip, a laser distance meter, a computer, an RS-232 interface wire, a USB interface wire, a fixed frame and an integrated switch, wherein the digital camera and the laser distance meter are fixed on the fixed frame; the integrated switch is arranged on a handlebar of the fixed frame and connected with the switches of the digital camera and the laser distance meter respectively; the digital camera is connected with the computer through the USB interface wire; and the laser distance meter is connected with the computer through the RS-232 interface wire. Aiming at the specific environment for measuring a crop leaf, the distance is adopted for determining the area represented by a pixel point according to the optical imaging principle; the device is simple and convenient to operate, and is affected little by the environment; and the device is convenient to carry and convenient for living body measurement of crops, and prevents destructive measurement from affecting the growth of the crops.
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Description

Technical field

[0001] The invention belongs to the field of measurement of crop growth information in a greenhouse environment, and relates to a measurement device based on lasers and images. Background technique

[0002] Crop leaf area parameter is an important crop growth parameter. This parameter can be used to calculate the water consumption, transpiration and yield of the crop. Therefore, the leaf area parameter can be used to analyze the growth status of plants, establish plant growth models, and further master plant leaves The growth law of the plant has positive significance for guiding production and formulating high-yield, high-quality and efficient cultivation techniques. The current leaf area measurement methods mainly include leaf weighing method, square method, regression equation method, leaf area meter method, digital image method, etc. The weighing method and the square method have high measurement accuracy, but the leaves need to be picked and weighed, which w...

Examples

Embodiment Construction

[0017] Such as Figure 1 to Figure 3 As shown, a device for measuring leaf area based on laser and image is composed of digital camera 1, leaf clip 2, laser rangefinder 3, computer 4, RS-232 interface line 5, USB interface line 6, fixed digital The camera and laser rangefinder fixed frame 7, digital camera and laser rangefinder integrated switch 8, leaf area measurement software 9. The blade clamp 2 is to stretch the leaves. Hold the blade clamp with your left hand. The blade clamp is in the shape of a scissors up and down. The pressing clip is a cross. The bottom holder is a white background bottom. The material of the cross-shaped pressing clip is strong reflective. The white material is easy to detect the interference in the image processing, so that it can be filled; the digital camera 1 and the laser rangefinder 3 are fixed on the fixing frame 7, the digital camera 1 is connected to the computer 4 through the USB interface cable 6, and the laser measurement The distance m...