Laser and image-based leaf area measurement device

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.

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...

AI Technical Summary

Problems solved by technology

The system-based calibration measurement method requires that the system must be calibrated before measurement, and the system needs to be re-calibrated when the measurement environment changes. However, this method has high measurement accuracy, but lacks flexibility and practicability.

The calibration measurement method based on the reference object is simple and convenient, and the operation is flexible, but the requirements for the reference object are strict, and the area of ​​the reference object directly affects the measured value of the leaf area.

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