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| 城区航空影像中铅垂线的自动提取 | |
| 引用本文： | 张勇,戴腾,高淑芬.城区航空影像中铅垂线的自动提取[J].地理空间信息,2009,7(5):142-145. |
| 作者姓名： | 张勇 戴腾 高淑芬 |
| 作者单位： | 1. 武汉大学遥感信工程学院,湖北,武汉,430079 2. 湖北省第一测绘院,湖北,武汉,430071 3. 湖北省第二测绘院,湖北,武汉,430071 |
| 基金项目： | 国家自然科学基金资助项目(40371099) |
| 摘 要： | 为了将铅垂线应用于城区空中三角测量，通过对大比例尺航空影像中铅垂线特点的分析，提出了一种有效的铅垂线提取算法，即首先对航空影像进行必要的预处理并自动提取直线，然后使用累积法从提取直线中分离出铅垂线并确定像底点坐标，最后应用共点约束的最小二乘直线模板匹配算法进一步提高铅垂线的提取精度及像底点的交会精度。 |
| 关 键 词： | 铅垂线 灭点 直线提取 最小二乘模板匹配 |
Auto Extracting Vertical Lines from Aerial Imagery over Urban Areas |
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| ZHANG Yong,DAI Teng,GAO Shufen.Auto Extracting Vertical Lines from Aerial Imagery over Urban Areas[J].Geospatial Information,2009,7(5):142-145. | |
| Authors: | ZHANG Yong DAI Teng GAO Shufen |
| Institution: | 1.School of Remote Sensing and Information Engineering;Wuhan University;Wuhan 430079;China;2. Hubei 1st Institute of Surveying and Mapping;Wuhan 430071;3. Hubei 2st Institute of Surveying and Mapping;China |
| Abstract: | In order to utilize the vertical lines into the application of aerial triangulation over urban areas, an effective auto extracting vertical lines arithmetic has been presented in the paper. The arithmetic pre-process the aerial images at first, and then through an accumulation space to extract the vertical lines from the auto-extracted lines and calculate the approximate nadir point position at the same time, at last a least square template matching with nadir constraints has been used to improve the accura... |
| Keywords: | vertical lines nadir point auto extracting least square template match |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ | |