基于纹理特征的小麦锈病动态模拟方法  

Dynamic simulation method of wheat rust based on texture feature

作　　者：杨猛[1,2] 丁曙 马云涛 谢佳翊 段瑞枫 YANG Meng;DING Shu;MA Yuntao;XIE Jiayi;DUAN Ruifeng(School of Information Science and Technology of Beijing Forestry University,Beijing 100083,China;Engineering Research Center for Forestry-Oriented Intelligent Information Processing of National Forestry and Grassland Administration,Beijing 100083,China)

机构地区：[1]北京林业大学信息学院,北京100083 [2]国家林业草原林业智能信息处理工程技术研究中心,北京100083

出　　处：《浙江大学学报（理学版）》2022年第1期1-9,共9页Journal of Zhejiang University（Science Edition）

基　　金：国家重点研发计划项目(2019YFC1521104);国家自然科学基金资助项目(61402038);北京市社会科学基金项目(17YTC030);中央高校基本科研业务费专项(2015ZCQ-XX,2017JC10)。

摘　　要：病害仿真是农业信息化的重要研究内容之一,通过模拟病害发生过程,可方便直观有效地宣传作物病害有关知识。病害模拟在教学、影视及游戏等领域也有重大应用价值。为实现作物病害过程模拟,以小麦为研究对象,在温度与湿度变化环境下,对小麦条锈病、叶锈病、秆锈病3种锈病类型进行基于纹理特征的动态仿真模拟。用噪声模拟分布在小麦茎叶上的孢子堆,通过调整噪声属性模拟不同的锈病类型,从而达到逼真的模拟效果;通过改变遮罩贴图中红绿蓝(RGB)3种颜色分量的分布,指定模拟发病位置,区分小麦锈病的发病类型;通过着色器调整指定位置作物模型表面贴图,以径向为扩散路径,完成植株从完好到完全发病的可视化过程。该方法模拟效果较好,具有一定的研究意义与应用价值,可为其他作物的多病害模拟提供参考。Simulation of plant disease is an important part of agricultural informatization.It can more intuitively and effectively disseminate knowledge of crop diseases and popularize the process of disease occurrence.In addition,disease simulation has great application values in the fields of teaching,film and games,etc.In order to simulate the process of crop diseases,this article takes wheat as the main research object.Considering the two environmental conditions of temperature and humidity,the three rust types of wheat stripe rust,leaf rust and stem rust are simulated based on textures feature.A noise function is used to simulate a distribution of spores on the wheat stems and leaves,and these noise properties can be adjusted according to the type of rust to achieve a more realistic simulation effect.The position of disease on the surface of plant can be simulated by changing the distribution of three-color components of RGB on a mask map.We adjust the surface map of a crop model into a specified position with a shader and then take a spherical shape whose radius is gradually increasing to specify the range of infected area.Finally we simulate a visualization of the whole spread process of a plant from intact to complete disease.Experimental results show that the simulation algorithm proposed in this paper is effective with realistic results and of good universality.The ideas of this simulation algorithm can provide a reference for various disease simulations of other kinds of plants.

关 键 词：纹理特征 锈病 Simplex噪声 着色器 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]