Detection method and system of water content in plant leaf based on multispectral image

Abstract

The invention discloses a detection method and system of water content in a plant leaf based on a multispectral image. The detection method comprises the following steps: a) getting monochrome images of a green light wave band, a red light wave band and a near-infrared wave band of the plant leaf of a sample; b) getting grayscale information of the monochrome images and getting grayscale texture characteristic quantity of the plant leaf of the sample; c) transforming the grayscale information to reflectivity information of the plant leaf of the sample and getting leaf vegetation index value through the reflectivity information; d) taking the grayscale texture characteristic quantity and the leaf vegetation index value as input vectors, taking actually measured water content value of the plant leaf as an output vector, and establishing a model; and e) getting the grayscale texture characteristic quantity and the leaf vegetation index value of the plant leaf to be detected by operating according to the steps a)-c) and putting into the model in the step d) to get the water content value of the plant leaf to be detected. The method disclosed by the invention can realize accurate, fast, non-destructive and real-time detection of the water content in the plant leaf.

Description

technical field [0001] The invention relates to the field of detection of water content of plant leaves, in particular to a method and system for detecting water content of plant leaves based on multi-spectral images. Background technique [0002] Stress refers to an environmental condition that deviates significantly from the optimum living conditions for plants. Water stress is when there is not enough water in the environment - a drought, or too much water - a flood. More than 30% of the land in the world belongs to arid and semi-arid areas, and drought seriously affects the growth and development of plants, and worsens the ecological environment. How to develop and utilize arid and semi-arid areas to plant plants has become an urgent problem to be solved. The impact of water stress on plants and the response and adaptation of plants to this are one of the important topics in the study of plant physiology and ecology. Whether it is from the perspective of agricultural d...

AI Technical Summary

Problems solved by technology

[0006] The invention patent application with the publication number "CN 101949825A" discloses a near-infrared non-destructive detection device for leaf moisture in an open light environment, including: a modulated light source, which is used to emit an AC light signal to the blade with modulated light intensity according to the AC law ; The detection circuit converts the AC light signal passing through the leaves into spectral data; the calculation processing device is used to calculate the water concentration of the leaves from the spectral data, and also discloses a near-infrared method for measuring leaf water in an open light environment. The non-destructive testing method includes: irradiating light rays of two predetermined wavelengths, the first light and the second light, to the surface of the blade successively through an optical fiber; converting the two light rays transmitted through the blade into first spectral data and second spectral data; according to Two kinds of spectral data are used to calculate the water concentration of leaves. Although this invention application can make the detection of leaf water more accurate, the operation and calculation process is relatively complicated.

Images