郁闭林分中立木树高的重建技术研究  

Study on Reconstruction Technique of Tree Height in Closed Stand

作　　者：王雪峰[1] 高义 

机构地区：[1]中国林业科学研究院资源信息研究所,北京100091 [2]内蒙根河市阿龙山林业局,根河022357

出　　处：《林业科学》2006年第6期61-65,共5页Scientia Silvae Sinicae

基　　金：国家自然科学基金项目(30271079)的部分内容。

摘　　要：将立木分为枝下高与树冠高2部分,通过近距离获取枝下高图像对,用立体视觉方法重建枝下高不同部位直径与倾角,以此为基础估计树冠高部分,进而得到树木高度。试验地包括银杏、水杉2个树种,与实际树高相比,重建树高中最大误差是0·0435,最小误差为0·0072。其中3号树(水杉)单侧误差仅为0·0026,表明与干曲线结合的立体视觉重建策略在恢复郁闭林分中立木树高是可行的。Dividing height of living tree into clean length and height of canopy, obtaining the picture pair of clean height by close shot, the diameter and tilts angles in different positions of clean length are rebuilt by mean of stereo vision. Based on the method, the height of canopy is estimated and the height of tree is obtained, therefore, in the process of tree height reconstructing through stereo vision, the problem from canopy occlusion is solved. The experiment includes two kinds of trees： Ginkgo biloba and Metasequoia glyptostroboides. Comparing with actual tree height, max absolute error of reconstructing height is 0.043 5, min is 0.007 2, tree No. 3 is 0.002 6 in one aspect. These result show the method of tree height reconstructing in closed stand through stereo vision and stem curve is feasible.

关 键 词：遮挡 树高测定 林木调查 立体视觉 三维重建 

分 类 号：S758[农业科学—森林经理学]