Plant disease detection method based on chlorophyll fluorescence and imaging technology

Abstract

The invention discloses a plant disease detection method and device based on chlorophyll fluorescence and imaging technology. The device is placed in the light box, and the blue LED light is used as the excitation light source. It has an equilateral triangle structure, which can achieve stable and uniform illumination, and is used to stimulate the chlorophyll fluorescence of plant leaves. The color high-speed camera and the adjustable lens front red filter Slices are used to filter out interference light and collect chlorophyll fluorescence images. Through the steps of image preprocessing, image segmentation and feature extraction, the leaf can be separated from the background, and the sub-image of the pixel area centered on the main vein can be obtained, and the texture features and vein feature parameters of the leaf can be calculated, and finally calculated by the classifier , plants can be classified into two categories, healthy and diseased. The invention can be used to stimulate chlorophyll fluorescence of plant leaves, acquire chlorophyll fluorescence images of plant leaves, calculate texture features and leaf vein feature parameters, and realize plant disease detection.

Description

technical field [0001] The invention relates to a method and device for detecting plant diseases, in particular to a method and device for detecting plant diseases based on chlorophyll fluorescence and imaging technology. Background technique [0002] The substances that can excite fluorescence in plants are mainly polyphenols and photosynthetic pigments, including carotenoids and chlorophyll. Under the excitation of one or more bands of excitation light, fluorescence spectra in different bands can be obtained. [0003] The development of excitation light source is from xenon lamp, halogen lamp to ultraviolet lamp and laser. In recent years, LED has become a new type of light source due to its advantages of low energy consumption and long life. Moreover, LEDs will not cause burn damage to plants. At present, there are growth boxes for preventing plant diseases based on LED light sources (patent application publication number: CN102014608A). [0004] Plants have the strong...

AI Technical Summary

Problems solved by technology

The current invention of detection devices for plant health status is mainly aimed at analyzing the content of plant nutrient elements, thereby judging whether the plants are healthy, and lacks a detection device for distinguishing healthy plants from diseased plants threatened by viruses and germs

Moreover, most of the existing devices for disease detection use visible light imaging or multispectral imaging technology, and there are few detection methods that combine chlorophyll fluorescence and imaging technology.

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