Non-destructive 3D geometric modeling of maize root-stubble in-situ via X-ray computed tomography  

作　　者：Xu Zhao Luyu Xing Shifan Shen Jiaming Liu Daixing Zhang 

机构地区：[1]School of Mechanical Engineering&Automation,University of Science and Technology Liaoning,Anshan 114051,China

出　　处：《International Journal of Agricultural and Biological Engineering》2020年第3期174-179,共6页国际农业与生物工程学报（英文）

基　　金：The work is financially supported by the National Natural Science Foundation of China(Grant No.51705227);University of Science and Technology Liaoning Talent Project Grants(Grant No.601011507-19);and Special Scientific Research Foundation of University of Science and Technology Liaoning(Grant No.2016YY02);We thank Jiuming Su for his lab assistance,and also thank Zong Zhang and Xinrui Xu for their analysis assistance.

摘　　要：No-tillage seeding has become an important approach to improve crop productivity,which needs colters of high performance to cut the root-stubble-soil composite.However,the difficulty of maize root-stubbles three-dimensional(3D)modeling hinders finite element(FE)simulation to improve development efficiency of such colters because of maize root system complexity and opaque nature of the soil.Fortunately,the non-destructive 3D geometric model of the maize root-stubble in-situ can be established via X-ray computed tomography(CT)following by a systematic procedure.The whole procedure includes CT scanning of the maize root-stubble-soil composite sample,image reconstruction via filtered back-projection(FBP)with the Hanning filter,segmentation of root-stubble via a variational level set method,and post-processing via morphological operations.The 3D reconstruction model of the maize root-stubble in-situ presents a complete,complex and in-situ geometrical morphology,which cannot be realized via other methods,including the destructive modelling after washing via CT.This study is the first to build a 3D geometric model of a maize root-stubble in-situ via CT,which opens up new possibilities for simulation of root-stubble-soil cutting using FEM,and much other research related to plant root-stubbles.

关 键 词：maize root-stubble non-destructive modeling X-ray computed tomography variational level set method 

分 类 号：S51[农业科学—作物学]