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基于改进Canny边缘检测算子的电子稳像算法研究周 同 邹丽新 尤金正 王海燕 杜伟巍


摘 要:针对特征点匹配电子稳像算法中提取的特征点容易受到噪声干扰的问题,在研究传统的特征点匹配电子稳像算法的基础上,提出了一种将改进的Canny边缘检测技术应用于电子稳像中的方法。利用改进的Canny算子对图像进行边缘检测,并通过对边缘检测的图像进行合理分区,在子区域内选择灰度最大边缘点作为特征点,并采用距离不变准则对特征点的有效性进行验证,建立二维运动模型进行全局运动估计,以此确定仿射模型的运动参数;最后利用卡尔曼滤波的方法来进行运动补偿,从而达到输出稳定视频图像的目的。实验结果表明,用这种方法提取的特征点具有良好的稳定性。
  关键词:Canny边缘检测; 特征提取; 区域分割; 特征匹配; 运动估计
  中图分类号:TP391.4
  文献标志码:A
  
  文章编号:1001-3695(2010)02-0506-03
  doi:10.3969/j.issn.1001-3695.2010.02.028
  
  Research of electronic image stabilization algorithm based on improvedCanny edge-detection operator
  
  ZHOU Tong, ZOU Li-xin, YOU Jin-zheng, WANG Hai-yan, DU Wei-wei
  
  (School of Physics Science & Technology, Soochow University, Suzhou Jiangsu 215006, China)
  
  Abstract:In order to solve the problem that the feature points easily influenced by the noise, based on the research of the traditional features tracking algorithm, this paper proposed an improved method of Canny edge-detection algorithm for electronic image stabilization. The image edge was detected with improved Canny operator, through dividing edge detected image into many blocks in reason, the largest gray edge points could be selected as the feature points. Proposed the distance invariant criterion to check the feature matching, which could keep global coherence of all local motions and produce the global motion vector by establishing two-dimensional model of movement. Then the parameters of the affine model were calculated based on these points. Finally, Kalman filter was applied to motion compensation to achieve the stability of the video sequences. The results of experiment show that it has favorable stabilities using this algorithm. ......
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