在实景三维建模软件支持下,使用无人机遥感技术快速获取广西扶绥县龙头乡将军屯速生桉林影像,通过Pix4d软件对航摄数据进行自动化内业处理,获取数字正射影像成果(DOM)和数字地表模型(DSM)以及树冠高度模型。基于此树冠高度模型,提取速生桉林的株数、树高、郁闭度等森林参数,并进行精度分析。结果表明:株数精度验证指标(株数探测率、株数准确率、F参数)较优;树高估测值与树高实测值存在较强相关性;郁闭度参数准确率高达92.85%。该林分参数自动化提取方法,能够达到相关实践要求,可以在一定程度上替代人工实测,在人工林中具有广阔应用前景。

With the support of real-world 3D modeling software,the UAV remote sensing technology was used to obtain images of fast-growing eucalyptus areas in Fusui County,Guangxi.The aerial photography data was processed automatically with Pix4d software,so as to obtain the Digital Orthophoto Map l(DOM),Digital Surface Model (DSM) and crown height model.Then the fast-growing eucalyptus forest tree stem,tree height,canopy density and other forest parameters were extracted based on the crown height model,and the precision of the extracted parameters was analyzed.The results showed that the stem precision verification index (stem detection rate,accuracy rate and f parameter) was better,and there was a strong correlation between the estimated value of tree height and the measured value of tree overestimation,and the accuracy of canopy density was 92.85%.The automatic extraction method of fast growing Eucalyptus stand parameters based on UAV remote sensing image could meet the relevant practical requirements,it could replace the manual measurement to a certain extent,and it would have broad application prospect in plantation.