基于标记控制区域生长法的单木树冠提取  

Individual Tree Crown Delineation Using Maker-controlled Region Growing Method

作　　者：甄贞[1] 李响 修思玉 赵颖慧[1] 魏庆彬 

机构地区：[1]东北林业大学,哈尔滨150040 [2]浙江慧鹏地理信息技术有限公司 [3]黑龙江省环境监测中心站

出　　处：《东北林业大学学报》2016年第10期22-29,共8页Journal of Northeast Forestry University

基　　金：中央高校基本科研业务费专项资金(DL13EA05-03)

摘　　要：根据2009年激光雷达数据、正射影像图及二类调查数据,选取凉水国家自然保护区针叶林和阔叶林样地进行单木树冠提取研究,包括利用动态窗口局域最大值法对单木位置进行探测,以及采用标记控制区域生长法进行树冠边界的勾绘,分别从样地和单木两个层次进行评价。结果表明：样地尺度上,针叶林和阔叶林的树冠面积相对误差的平均值分别为8.74%和-8.24%。单木尺度上,针叶林样地的生产者精度在62.2%~77.3%浮动,用户精度在71.5%~83.9%浮动;而阔叶林样地的生产者精度达到76.1%~91.2%,用户精度达到78.5%~92.5%。阔叶林样地勾绘精度浮动较大,但略优于针叶林样地的勾绘精度,是由于阔叶林样地中树冠分布较稀疏所致;而＂位置匹配但过度生长＂的情况过多是针叶林样地树冠提取精度不高的主要原因。Based on LiDAR,orthoimagery and forest inventory data in 2009,we delineated individual tree crown in coniferous and deciduous plots in Liangshui National Nature Reserve,including treetop detection using local maximum method with variable window size,and individual crown boundary delineation using marker-controlled region growing method. The accuracies were assessed on both plot and individual tree levels. For crown boundary delineation,relative error of crown area（ RE_CA） of coniferous and deciduous plots were 8.74% and-8.24%,respectively. Producer＇s accuracy（ PA） and user＇s accuracy（ UA） for conifers were 62.2%-77.3% and 71.5%-83.9%,while PA and UA for deciduous plots were 76.1%-91.2% and 78.5%-92. 5%,respectively. The deciduous forests had more fluctuant but higher PA and UA than conifers due to the lower canopy density. The case of ＂match but over growing＂was the main reason that the accuracy was low in coniferous forests.

关 键 词：局域最大值 区域生长法 单木树冠提取 激光雷达 凉水国家自然保护区 

分 类 号：S75[农业科学—森林经理学]