| 一种综合机载LiDAR与高分辨率航空影像的铁路轨道提取方法 |
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| 引用本文： | 于海洋,牛峰明,罗玲,马慧慧.一种综合机载LiDAR与高分辨率航空影像的铁路轨道提取方法[J].测绘工程,2016,25(5):42-46. |
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| 作者姓名： | 于海洋 牛峰明 罗玲 马慧慧 |
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| 作者单位： | 河南理工大学 矿山空间信息技术国家测绘地理信息局重点实验室，河南 焦作 454000;河南理工大学 测绘与国土信息工程学院，河南 焦作 454000;河南理工大学 测绘与国土信息工程学院,河南 焦作,454000 |
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| 基金项目： | 国家自然科学基金资助项目(U1304402);卫星测绘技术与应用国家测绘地理信息局重点实验室经费资助项目(KLAMTA-201405);河南省高校科技创新团队支持计划资助项目(14IRTSTHN026) |
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| 摘 要： | 高分辨率航空遥感数据中铁路轨道线性特征明显,可以直接用于铁路轨道的精细提取。首先根据铁路路基光谱、局域地形等特征,基于机载LiDAR数据建立一种面向对象的铁路区域提取算法;进一步通过数学形态学处理消除干扰因素的影响,选取适当的影像波段进行掩模提取图像中的铁路区域,采用基于高斯平滑和微分几何的线性地物提取算法初步提取铁路轨道线。在噪声消除、线段连接的基础上建立轨道平行线算法模型,从而实现轨道信息的准确提取。实验结果证明上述方法的有效性,轨道提取精度达到94.6%以上。
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| 关 键 词： | 机载LiDAR 铁路轨道 面向对象的图像分析 微分几何脊线提取 平行线模型 |
Rail extraction from airborne LiDAR and high resolution aerial image |
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| YU Haiyang,NIU Fengming,LUO Ling,MA Huihui.Rail extraction from airborne LiDAR and high resolution aerial image[J].Engineering of Surveying and Mapping,2016,25(5):42-46. |
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| Authors: | YU Haiyang NIU Fengming LUO Ling MA Huihui |
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| Institution: | YU Haiyang;NIU Fengming;LUO Ling;MA Huihui;Key Laboratory of Mine Spatial Information Technologies of National Administration of Surveying Mapping and Geoinformation of China,Henan Polytechnic University;School of Surveying and Land Information Engineering,Henan Polytechnic University; |
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| Abstract: | Railway track is the key ingredient in object positioning of railway infrastructure surveying and mapping .The linear characteristics of railway track in high‐resolution aerial remote sensing data are obvious ,which can be directly applied to fine extraction of railway track .First according to the spectrum and local terrain characteristics of the railway subgrade ,an object‐oriented railway region extraction algorithm is established based on airborne LiDAR data .Further the interference factors are eliminated by mathematical morphology processing and the appropriate mask image bands are selected for extracting railway area .Based on gauss smooth and differential geometry linear feature extraction algorithm ,the preliminary railway track lines are extracted .On the basis of noise elimination ,line connection ,a rail parallel algorithm model is established in order to realize the accurate rail information extraction .Experimental results prove the validity of this method ,of which the rail extraction accuracy is above 94.6% . |
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| Keywords: | airborne LIDAR rail OBIA differential geometry ridge line extraction parallel model |
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