农业机械学报2018，Vol.49Issue(2)：22-27,6.DOI:10.6041/j.issn.1000-1298.2018.02.003
基于激光视觉的农作物株高测量系统
Crop Height Measurement System Based on Laser Vision
摘要
Abstract
In order to solve the problem that vertex and bottom points of the crop are difficult to be identified in height measurement of crop by using the visual method,a crop height measurement system based on laser vision was designed.The improved triangulation model,which was designed according to the character of crop height measurement,was used to describe the mathematical model of the system.The model parameters of the crop height measurement system included three parts,which were the parameters of camera,the equation of light plane and camera installation parameter.The model parameters were calibrated by a novel checkerboard method.In the process of the system parameters calibration,the checkerboard must be placed on the parallel plane of the corresponding horizontal plane where the bottom point of the crop was on at least once,to establish the ground coordinate system.Furthermore,the system identified the crop apex by projecting the laser onto the crop.The results of measurement in crop plant height of 558.00 ～ 1 843.30 mm showed that the absolute error was no more than 28.30 mm and the relative error was no more than 2.17％.Furthermore,the restrictive conditions of the system and suggestions for engineering implementation were given.This system can achieve real-time measurement automatically with a high precision and it had good practical value.关键词
株高测量/三角测量/激光视觉/自动化测量Key words
crop height measurement/triangulation/laser vision/automatic measurement分类
农业科技引用本文复制引用
郭新年,周恒瑞,张国良,柯永斌,苏军,赵正敏..基于激光视觉的农作物株高测量系统[J].农业机械学报,2018,49(2):22-27,6.基金项目
江苏省农业三新工程项目(SXGC[2016]158)、江苏省农业科技自主创新资金项目(CX(12)3036)、江苏省前瞻性联合研究项目(BY2016061-02)和江苏省湖泊环境遥感技术工程实验室开放课题项目(JSLERS-2017-007) （SXGC[2016]158）
