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Remote Sensing Technology and Application  2006, Vol. 21 Issue (2): 109-114    DOI: 10.11873/j.issn.1004-0323.2006.2.109
article     
A Geometric Rectification Algorithm of Scanned Topographic Map Based on Hough Transform
LI Guan-yi1, 2 , LIN You-ming 1
( 1. China Remote Sensing Satellite Ground Station, Beijing 100086, China; 2. Graduate University of the Chinese Academy of Sciences, Beijing 100039, China)
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Abstract  

This paper gives a thorough study on geometric rectification of scanned to pographic map. There are many distortions caused by some reasons in scanned topographic maps. So they must be rectified before we use them. To reduce distortions effectively, the method of triangulation with grid points could be used usually for geometric rectification and lots of control points are required. But it' s too hard to extract grid points manually. In order to identify all grid points automatically , a novel geometric rectification algorithm of scanned topographic map is presented in this paper , which is based on the improved hought ransform.At first, we calculate the initial positions of grid points approximately using information of topography map, and make a “十”shape search area around each grid predicted point . And then, hough transform is used to detect grid lines in every search area and the intersections of grid lines are calculated. Finally, themap is rectified triangularly by affine transform, with intersections detected by hough transform as reference point s. Experimental results have showed that this method had the high precision performance to realize the sub-pixel precision extraction of grid points and no need to find reference points one by one manually . And it's also faster than traditional manual method.

Key words:  Hough transform      Line recognition      Sub-pixel precision      Rectification of topographic map      Control point extraction     
Received:  04 December 2005      Published:  27 September 2011
   
  TP 75  
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Cite this article: 

LI Guan-yi , LIN You-ming. A Geometric Rectification Algorithm of Scanned Topographic Map Based on Hough Transform. Remote Sensing Technology and Application, 2006, 21(2): 109-114.

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http://www.rsta.ac.cn/EN/10.11873/j.issn.1004-0323.2006.2.109     OR     http://www.rsta.ac.cn/EN/Y2006/V21/I2/109

〔1〕 张永生, 巩丹超. 高分辨率遥感卫星应用—— 成像模型、处理算法及应用技术第一版〔M〕. 北京: 科学出版社, 2004.
〔2〕 李弼程, 彭天强, 彭波, 等. 智能图像处理技术第一版〔M 〕. 北京: 电子工业出版社, 2004.
〔3〕 曾衍伟. 地形图扫描数字化精度分析〔J〕.四川测绘, 2003, 26( 2) : 82~85.
〔4〕 Opas Chutatape, Linfeng Guo. A Modified Hough Transformation for Line Detection and Its Performance〔J〕.Pattern Recognition, 1999, 32( 2) : 181~192.
〔5〕 江兴智, 赵宇明. 基于改进Hough 变换的手写信函书写线去除方法〔J〕.上海铁道大学学报, 2000, 21( 6) : 62~66.

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