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一种新的基于多特征的图像自动配准技术


□ 杨 猛 朱长仁

  摘 要:提出了一种新的基于多特征的图像自动配准技术。该方法使用不变矩对图像中的区域进行匹配,然后利用匹配区域的区域标记寻找大尺度上的特征点作为控制点进行初始配准,进而在此基础上指导改进链码的方法对开放边缘进行二次配准。最后根据所得到的控制点构成的超定方程组利用最小二乘拟合的方法得到配准参数。经过实验证明该算法能够达到亚像素级的配准精度,并且适用于不同传感器图像以及同传感器同波段或不同波段图像之间的精确配准。
  关键词:图像配准;多特征;多源图像
  中图分类号:TP391 文献标志码:A
   文章编号:1001-3695(2008)07-2228-04
  
  New automatic image registration based on multi-features
  
  YANG Meng , ZHU Chang-ren
  
  (National Key Laboratory of Automatic Target Recognition, College of Electronic Science & Engineering, National University of Defense Technology, Changsha410073,China)
  
  Abstract: This paper presented a new automatic image registration based on multi-features. The characteristic of this approach was that the invariant moment shape descriptor was used to establish correspondences between the potentially matched regions detected from the two images, and the improved signature was used to find the registration control points(RCP) as the stage of coarse registration. Then the improved chain-code matching had been performed as the registration refinement. Finally, the registration parameters were computed by using the least mean square. Experimental results with various kinds of image data show the high accuracy of our algorithm in multi-sensor image registration. ......
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