| 一种改进的正射影像镶嵌线最小化最大搜索算法 |
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| 引用本文： | 袁修孝,钟灿.一种改进的正射影像镶嵌线最小化最大搜索算法[J].测绘学报,2012,41(2):199-204. |
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| 作者姓名： | 袁修孝 钟灿 |
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| 作者单位： | 1. 武汉大学;2. 武汉大学遥感信息工程学院; |
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| 基金项目： | 国家创新研究群体科学基金，中央高校基本科研业务费专项资金 |
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| 摘 要： | 正射影像在影像边缘和覆盖有房屋、树木等地物的区域上表现出投影差，且投影差在不同的影像上不相同。当两幅正射影像镶嵌时，在重叠区域的差分影像上，这些区域表现为高亮度区，理想的镶嵌线应避开此类区域。本文采用贪心搜索方法选择镶嵌线，并改进了最小化最大算法的局部选择方式和判据，在正射影像重叠区域的差分影像上自动搜索镶嵌线。试验表明，改进算法搜索的镶嵌线能够很好地避开投影差大的区域，且具有较好的自适应性。
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| 关 键 词： | 正射影像镶嵌 贪心搜索法 最小化最大算法 |
| 收稿时间： | 2011-02-18 |
| 修稿时间： | 2011-06-12 |
An Improvement of Minimizing Local Maximum Algorithm on Searching Seam Line for Orthoimage Mosaicking |
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| YUAN Xiuxiao,ZHONG Can.An Improvement of Minimizing Local Maximum Algorithm on Searching Seam Line for Orthoimage Mosaicking[J].Acta Geodaetica et Cartographica Sinica,2012,41(2):199-204. |
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| Authors: | YUAN Xiuxiao ZHONG Can |
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| Institution: | School of Remote Sensing and Information Engineering,Wuhan University,Wuhan 430079,China |
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| Abstract: | Orthoimage has relief displacements in the edge area and area with buildings or trees.And displacements differ significantly on different orthoimages.An ideal seam-line should be away from high-displacement-area.An improvement of minimizing local maximum algorithm is proposed in searching seam-line on differential image of overlapped region.Improvements are mainly manifested in substituting Dijkstra algorithm for Greedy algorithm in local path selection and modifying decision criteria.The result shows that improved method is self-adaptive,and is able to select a seam-line away from high-displacement-area,which fulfills the request of seamless mosaic. |
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| Keywords: | orthoimage mosaicking greedy select algorithm minimize local maximum algorithm |
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