| 利用改进FLIC算法进行重力矢量场可视化 |
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| 引用本文： | 李振海,罗志才,汪海洪,李琼.利用改进FLIC算法进行重力矢量场可视化[J].武汉大学学报(信息科学版),2011(3). |
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| 作者姓名： | 李振海 罗志才 汪海洪 李琼 |
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| 作者单位： | 武汉大学测绘学院;武汉大学地球空间环境与大地测量教育部重点实验室;武汉大学测绘遥感信息工程国家重点实验室; |
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| 基金项目： | 国家自然科学基金资助项目(40874002); 国家973计划资助项目(2007CB714405); 国家863计划资助项目(2008AA12Z105); 国家教育部新世纪优秀人才支持计划资助项目(NCET-07-0635); 地球空间环境与大地测量教育部重点实验室开放研究基金资助项目(08-02-03) |
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| 摘 要： | 针对固定滤波长度公式得到的LIC图像显示效果不理想的缺点,利用纹理流线上所有点亮度值的统计方差来衡量可视化精度,提出了一种滤波长度随矢量变化的改进FLIC算法。用颜色信息表示重力异常大小或者真实垂线偏差大小,纹理方向表示重力方向,基于改进FLIC算法实现了重力矢量场的可视化,结果表明,重力矢量场的可视化具有表达多维信息和矢量方向细节、图形直观易读等优势。
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| 关 键 词： | 改进FLIC算法 重力矢量场 可视化 滤波长度 |
Visualization of Gravity Vector Field Using Improved FLIC Algorithm |
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| LI Zhenhai LUO Zhicai, WANG Haihong, LI Qiong.Visualization of Gravity Vector Field Using Improved FLIC Algorithm[J].Geomatics and Information Science of Wuhan University,2011(3). |
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| Authors: | LI Zhenhai LUO Zhicai WANG Haihong LI Qiong |
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| Institution: | LI Zhenhai1 LUO Zhicai1,2,3 WANG Haihong1,2 LI Qiong1 (1 School of Geodesy and Geomatics,Wuhan University,129 Luoyu Road,Wuhan 430079,China) (2 Key Laboratory of Geospace Environment and Geodesy,Ministry of Education,China) (3 State Key Laboratory of Information Engineering in Surveying,Mapping and Remote Sensing,China) |
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| Abstract: | In order to overcome the shortcomings of the traditional LIC algorithm with fixed filter length,an improved FLIC algorithm which filter length varied with the vector direction was proposed.And statistical variance of the intensities at all points in one texture streamline was employed to evaluate the visualization accuracy.The computational efficiency and visualization accuracy can be improved simultaneously by the new method.Furthermore,visualization of gravity vector field was carried out by improved FLIC... |
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| Keywords: | improved FLIC algorithm gravity vector field visualization filter length |
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