玉米霉变与其图像颜色特征参数之间的相关性研究

Correlation analysis between maize mildew and the image color feature parameters

通过模拟玉米霉变过程,定时测定了玉米霉变期间的带菌量;同时利用扫描仪器对霉变玉米的图像进行采集,提取颜色特征参数,分析并探讨了霉变玉米的颜色特征与带菌量之间的相关性。结果显示,两种玉米在霉变过程中,随着储藏时间的延长,其颜色特征参数R、G、B、I值均呈减小趋势,并与霉变玉米的带菌量呈现负相关,郑单958带菌量与其特征参数G值相关性较高,达到-0.928 1,说明用G值表示郑单958的带菌量准确性较高;先玉335带菌量与其特征参数R值相关性较高,达到-0.939 0,说明用R值表示先玉335的带菌量准确性较高。试验结果表明,采用图像处理技术以图像颜色特征参数值来表示玉米的带菌量及霉变程度是可行的。

By simulating the process of maize mildew, the quantity of pathogen of moldy maize was determined at a regular time. At the same time, with the scanning instrument, collecting the image of moldy maize and extracting the color feature parameters, the relationship between color features and quantity of pathogen was explored. The results showed that：in the molding process, the color parameters（R,G, B and I） of two kinds of maize were decreasing and negatively correlated with quantity of pathogen. Zhengdan 958 had a better correlation between quantity of pathogen and G value（--0. 928 1）, which indicated that the quantity of pathogen of Zhengdan 958 illustrated with G value had high accuracy; Xianyu 335 had a better correlation between quantity of pathogen and R value（-0. 939 0）, which indicated that the quantity of pathogen of Xianyu 335 illustrated with R value had high accuracy. The quantity of pathogen and moldy maize illustrated with the image color feature parameters by imagery processing technology were feasible.