| 用于末制导的SAR图像多子区实时匹配算法 |
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| 引用本文： | 张绍明,陈映鹰,林怡.用于末制导的SAR图像多子区实时匹配算法[J].测绘学报,2007,36(4):406-413. |
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| 作者姓名： | 张绍明 陈映鹰 林怡 |
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| 作者单位： | 同济大学,测量与国土信息工程系,上海,200092;同济大学,遥感与空间信息技术研究中心,上海,200092;同济大学,测量与国土信息工程系,上海,200092;同济大学,遥感与空间信息技术研究中心,上海,200092;同济大学,测量与国土信息工程系,上海,200092;同济大学,遥感与空间信息技术研究中心,上海,200092 |
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| 基金项目： | 航天基金项目(0747-0540SITC2099-4) |
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| 摘 要： | 为实现用于无人飞行器末制导的SAR实时影像与多源基准影像的匹配，提出一种新的基于子区位置关系约束的SAR图像匹配算法。首先将SAR图像进行对数变换，并进行小波包分解，在高频子图部分对小波包系数进行收缩，抑制噪声，然后利用断面检测法提取边缘。匹配中将SAR实时图分为多个子区，用子区灰度标准差和频谱直方图判别其可匹配性，并更新不可匹配区。将各子区位置分布关系用作匹配结果的约束条件。为保证算法实时性，匹配采用基于提升小波的金字塔分层搜索策略。用星载SAR图像和卫星光学图像进行了大样本匹配实验，实验结果表明该方法是一种能在精度、实时性和可靠性方面都能满足导弹末制导要求的实时匹配算法。
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| 关 键 词： | SAR图像匹配 边缘提取 小波包变换 频谱直方图 多子区 |
| 文章编号： | 1001-1595（2007）04-0406-08 |
| 修稿时间： | 2006-12-18 |
A Robust Matching Algorithm for SAR Image with Multiple Sub-areas |
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| ZHANG Shao-ming,CHEN Ying-ying,LIN Yi.A Robust Matching Algorithm for SAR Image with Multiple Sub-areas[J].Acta Geodaetica et Cartographica Sinica,2007,36(4):406-413. |
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| Authors: | ZHANG Shao-ming CHEN Ying-ying LIN Yi |
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| Institution: | 1. The Center of Remote Sensing and Spatial lnformatics Technology, Tongji University, Shanghai,200092, China; 2. The Center of RS and Spatial Information Technical Research, Tongji University, Shanghai,200092 |
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| Abstract: | In order to match SAR image to radar reference image and optical one,a novel algorithm of scene matching using multiple sub-area was presented.The image was logarithmicaly transformed and was decomposed into multiple sub-band images with wavelet packet transform.The high frequency coefficients shrink according the relationship between itself and the one nearby,which reduce the speckle noise in SAR data.And the edge feature was then extracted via contour detecting algorithm.The SAR image was divided into multiple sub-areas in matching process.The feasibility for each sub-area was evaluated by computing the gray level standard deviation and the distance of spectral histogram,and the sub-areas can not be matched to reference image were updated.The spatial relationship of the sub-area was used as constraint conditions to correct the result.The multiple-layer search strategy based on lifting wavelet transform was used to improve the performance of the algorithm.Large-sample data experiment has been conducted with satellite SAR reference image and satellite optical one.The experiment result shows that the algorithm is effective,robust and suitable,and it is able to meet these requirements of terminal guidance for missile. |
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| Keywords: | SAR scene match edge extraction wavelet packet transform spectral histogram multiple sub-area |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
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