| 基于Hough变换的航空影像建筑物半自动提取 |
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| 引用本文： | 杨化超,邓喀中,张书毕.基于Hough变换的航空影像建筑物半自动提取[J].测绘科学,2006,31(6):93-94,97. |
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| 作者姓名： | 杨化超 邓喀中 张书毕 |
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| 作者单位： | 中国矿业大学环境与测绘学院,江苏徐州,221008 |
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| 摘 要： | 针对Hough变换不能检测直线段的缺点,提出了一种改进的Hough变换用于影像中矩形建筑物的半自动提取。同传统Hough变换相比,改进的Hough变换充分利用了Hough变换的参数空间数据,将Hough变换的“投票”过程和直线段的检测过程融为一体,获得直线段的端点坐标。根据直线段的端点坐标消除虚假直线段的过连接,并根据直线段的角度、距离条件合并直线段。最后通过直线段上的若干点利用最小二乘法拟合出一条最佳直线,通过计算最佳直线的交点确定建筑物的角点坐标,完成影像中建筑物的半自动提取。实验结果表明:用改进的Hough变换算法提取出的航空影像中建筑物边缘结果是正确的,定位精度较高。
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| 关 键 词： | Hough变换 图像预处理 直线段检测 半自动提取 最小二乘直线拟合 |
| 文章编号： | 1009-2307（2006）06-0093-03 |
| 收稿时间： | 2005-10-27 |
| 修稿时间： | 2005-10-27 |
Semi-automated extraction from aerial image using improved Hough transformation |
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| YANG Hua-chao,DENG Ka-zhong,ZHANG Shu-bi.Semi-automated extraction from aerial image using improved Hough transformation[J].Science of Surveying and Mapping,2006,31(6):93-94,97. |
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| Authors: | YANG Hua-chao DENG Ka-zhong ZHANG Shu-bi |
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| Abstract: | Conventional Hough transformation can not detect line segments,so we proposed a method of improved Hough transformation to extract rectangle house.Compared with conventional Hough transformation,improved Hough transformation take full use of data of Hough parameter space,complete the processing of voting and line segment detection,and get the coordinates of line segments' start and end point.Based on these coordinates,we can eliminate over-connected caused by the falsehood line segment and then unite line segment according to angle and distance conditions.Last,optimal line can be acquired by least squares line fitting using some points,buildings' corner points coordinates can be determined by lines' intersection,and then semi-automated building extraction can be completed.The test results indicate that the building outline extracted using this method is true and the precision of location is high. |
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| Keywords: | Hough transformation image pre-processing line segment detection semi-automated extraction least squares line fitting |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
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