Plant haulm diameter measurement device and measurement method based on machine vision

Abstract

The invention provides a device and a method for measuring the diameter of plant stems based on machine vision. The measurement device comprises a camera (1), an annular LED light source (2), a support frame (3), a cylindrical reference object (4), an IEEE 1394 signal fiber transmission device (5), a data transmission cable (6) and a computer (7). The measurement method comprises the following steps of utilizing the camera (1) to acquire images of a to-be-measured plant stem and the cylindrical reference object (4) within a certain time interval, transmitting the images to the computer (7) through the IEEE 1394 signal fiber transmission device (5) and the data transmission cable (6) and utilizing image processing software installed in the computer to calculate the diameter of the plant stem. The invention effectively solves the constraint influence of the prior measurement tool on the diameter changes of the plant stem, avoids the trouble of replacing different range sensors for measuring different plant stems, and can be used for nondestructively monitoring the diameter of the plant stem and small variable quantity of diameter within a certain period of time on line.

Description

Technical field: [0001] The invention relates to a measuring device and method for measuring the diameter of a plant stalk, in particular to a device and a method for measuring the diameter of a plant stalk by using machine vision technology. Background technique: [0002] The water status of plants is not only determined by the water status of the soil, but also related to factors such as changes in atmospheric evaporation, distribution of plant roots, plant growth and physiological characteristics, and water conduction capacity. Therefore, using the water status of the plant itself as the basis for irrigation is more reliable than using the soil moisture status. The diameter of plant stems and their small changes are recognized as important physiological indicators to characterize the water status of plants. Research and develop devices and methods that can measure plant stem diameters accurately, efficiently and quickly, and monitor plant stem diameters and their tiny cha...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to address the limitations of existing devices and methods for measuring plant stalk diameters that require replacement of sensors with different ranges, inability to measure the absolute value of plant stalk diameters, and constraints on the natural growth of plant stalks, when measuring different plant stalk diameters. A device and method for measuring plant stem diameter based on machine vision is provided. By regularly collecting images of plant stems within a set time interval, image processing algorithms are used to analyze and calculate the diameter of plant stems, thereby calculating a certain The small change in the diameter of the plant stem within a time period can realize the non-destructive online monitoring of the diameter of the plant stem, and meet the requirements of the research related to agricultural efficient water-saving irrigation for the measurement of small changes in the diameter of the plant stem

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