山东农业科学2024，Vol.56Issue(3)：145-153,9.DOI:10.14083/j.issn.1001-4942.2024.03.020
基于无人机可见光影像的免耕种植夏玉米苗数估算
Estimation of No-Tillage Planting Summer Maize Seedling Number Based on UAV Visible Light Images
摘要
Abstract
This study aimed to quickly estimate the emergence number of no-tillage planting summer maize and improve the field management accuracy.Using the high-resolution visible light images of summer maize fields obtained by UAV equipped with a visible light camera,8 vegetation indices were calculated and used to segment vegetation and non-vegetation combined with the maximum between-class variance method.After comparing the segment effect,the red vegetation index(RI)binary image was selected for the visible light image mask.Through counting of summer corn and weeds,comparing the variation coefficients of 24 tex-ture features of weeds and their relative difference coefficient with those of summer maize,the red variance was selected as the feature to extract summer maize seedlings,and the threshold determined by time series inter-section threshold method was used to remove weed.With the extracted morphological characteristic parameters of summer maize seedlings,four algorithms of support vector machine(SVM),BP neural network,K-nearest neighbor and decision tree were used to construct the prediction model of summer maize seedling number.The results showed that the overall effects of SVM and decision tree algorithm were better with determination coeffi-cient over 0.8 and mean absolute error less than 0.3,and the accuracy of decision tree model was the highest up to 94.1% .The results of this study could provide technical support for estimating the emergence rate of summer maize in large area.关键词
夏玉米/出苗数/无人机(UAV)/遥感/可见光Key words
Summer maize/Emergence rate/UAV/Remote sensing/Visible light分类
农业科技引用本文复制引用
苗建驰,崔文豪,杨蕾,李京谦,兰玉彬,赵静..基于无人机可见光影像的免耕种植夏玉米苗数估算[J].山东农业科学,2024,56(3):145-153,9.基金项目
山东省自然科学基金项目(ZR2021MD091) （ZR2021MD091）
山东省引进顶尖人才"一事一议"专项经费资助项目(鲁政办字[2018]27号) （鲁政办字[2018]27号）
