基于三维虚拟环境的林分结构调整可视化模拟技术

发布时间：2018-03-02 15:47

本文选题：三维虚拟环境　切入点：林分结构　出处：《林业科学研究》2016年06期 　论文类型：期刊论文

【摘要】：[目的]以真实林分三维场景为模型,结合计算机虚拟现实技术,实现对真实林分结构的调整优化可视化模拟。[方法]以湖南攸县黄丰桥国有林场杉木与鹅掌楸人工混交林为研究对象,采用可视化模拟技术,基于三维虚拟环境建立林分结构调整可视化模拟系统,实现对林分结构的优化调整进行可视化模拟。通过对林分的角尺度、大小比、混交度、开阔比等结构的计算分析,结合公告板显示技术和射线查询算法,在MOGRE构建的林分三维场景中对林分结构调整过程进行可视化模拟。[结果]样地林分结构经过调整后,平均树高由12.8 m变成13.6 m,平均胸径由17.1 cm变成18.6 cm;林分平均角尺度由0.449变为0.481,分布格局由调整前的均匀分布变成随机分布;林分平均大小比由0.511变为0.519,样地内林木生长更具有优势;林分平均混交度由0.093变为0.129,林分结构更加稳定,林分的整体质量也得到了提高。[结论]本研究采用可视化模拟技术和样地调查数据,构建虚拟三维森林环境,在三维场景中,森林经营者不仅能查看样地中每株林木构筑性属性,观察林分样地的整体状态,还能对林分结构进行优化调整,实现在虚拟森林环境中对样地林分结构调整进行可视化模拟。
[Abstract]:[objective] taking the real stand 3D scene as the model, combining with the computer virtual reality technology, [methods] the artificial mixed forest of Cunninghamia lanceolata and Liriodendron mandshurica in Huangfengqiao State Forest Farm, Youxian, Hunan Province, was studied, and visual simulation technology was used. Based on 3D virtual environment, a visual simulation system of stand structure adjustment is established to realize the visual simulation of the optimum adjustment of stand structure. Through the calculation and analysis of the structure of the stand, such as angle scale, size ratio, mixing degree and open ratio, etc. Combined with bulletin board display technology and ray query algorithm, the stand structure adjustment process was visualized in the stand 3D scene constructed by MOGRE. [results] after the stand structure was adjusted, the stand structure was adjusted. The average tree height changed from 12.8 m to 13.6 m, the average DBH from 17.1 cm to 18.6 cm, the mean angle scale from 0.449 to 0.481m, and the distribution pattern changed from uniform distribution to random distribution. The average stand size ratio changed from 0.511 to 0.519, and the average stand mixing degree changed from 0.093 to 0.129, and the stand structure was more stable. The overall quality of stand has also been improved. [conclusion] in this study, visual simulation technology and sample survey data were used to construct virtual three-dimensional forest environment. Forest managers can not only check the architectural properties of each tree in the sample land, observe the whole state of the stand, but also optimize the stand structure and realize the visual simulation of the forest structure adjustment in the virtual forest environment.
【作者单位】：中国林业科学研究院资源信息研究所;中南林业科技大学计算机与信息工程学院;
【基金】：中央级公益性科研院所基本科研业务费专项资金(IFRIT201503) 国家自然科学基金(31170590) “十二五”国家863计划课题(2012AA102002)
【分类号】：TP391.9;S758

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