Rice blast grading system and method

Abstract

The invention provides a rice blast grading system and a rice blast grading method, which can quickly, stably and accurately grade the rice blast, are convenient to operate, can obtain an accurate grading result of the rice blast in real time through the photographing of a mobile terminal, reduce an identification threshold and improve the efficiency of identification work. The grading system comprises an image preprocessing unit, a spot feature extraction unit which is used for calculating to obtain a first pixel point area Img _ N of a whole leaf and a second pixel point area Img _ n withouta disease spot, wherein the reverse threshold cutting is carried out on the pixel point area Img _ n to obtain a second image of which the disease spot part is removed, and then the OTSU binaryzationis carried out on the second image to obtain a second pixel point area Img _ n of which the disease spot is removed; an area proportion calculation unit which is used for substituting the first pixelImg _ N and the second pixel Img _ n calculated by the scab feature extraction unit into an area proportion formula to obtain an area proportion value; and a grading unit.

Description

technical field [0001] The invention relates to the field of identifying and grading rice blast, in particular to a rice blast grading system and a method thereof. Background technique [0002] Rice blast is one of the most common diseases of rice. Rice blast may cause a substantial reduction in rice production. The disease occurs in all rice-growing regions around the world. Rice is the largest grain crop in my country, so it is of great significance to study how to control rice blast. Rice blast can be divided into seedling blast, leaf blast, node blast, panicle blast, and grain blast according to different pathogenic sites, and the onset period of leaf blast mainly presents as lesions of different sizes on leaves. According to the ratio of rice blast disease spot area to leaf area, researchers divided rice blast disease into 5 grades. At present, there are mainly two methods for grading the disease course of rice blast. [0003] One is the most common manual determinat...

AI Technical Summary

Problems solved by technology

But there are three shortcomings in this method: (1) poor portability

(2) High cost

Ordinary people who want to use this method must purchase corresponding equipment and learn how to use the equipment, which greatly increases the cost of learning and use

(3) Low efficiency

This method requires a series of operations and analysis to obtain the results, and it takes a long time to obtain the results

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