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计算机工程 ›› 2007, Vol. 33 ›› Issue (23): 211-212. doi: 10.3969/j.issn.1000-3428.2007.23.073

• 人工智能及识别技术 • 上一篇    下一篇

基于Canny理论的多方向角边缘检测算法

王 英1,向碧群2,黄 颖1   


  1. (1. 重庆邮电大学计算机科学与技术学院,重庆 400065;2. 重庆邮电大学移通学院,重庆 400065)
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2007-12-05 发布日期:2007-12-05

Multi-direction Edge Detection Algorithm Based on Canny Theory

WANG Ying1, XIANG Bi-qun2, HUANG Ying1   


  1. (1. College of Computer Science and Technology, Chongqing University of Posts and Telecommunications, Chongqing 400065; 2. College of Mobile Telecommunications, Chongqing University of Posts and Telecommunications, Chongqing 400065)
  • Received:1900-01-01 Revised:1900-01-01 Online:2007-12-05 Published:2007-12-05

摘要: 传统Canny边缘检测算法通过计算水平方向和垂直方向的梯度来分析当前像素点的梯度强度和方向。该算法由于没有充分利用所有邻域的信息,因此在边缘较为复杂的区域结果会出现较大的偏差。该文提出基于方向滤波器的Canny算法,充分利用各邻域的信息,对图像进行了多方向的分析。实例比较证明,应用了方向滤波器的算法提高了边缘检测和保持的能力,有较强鲁棒性。

关键词: 方向滤波器, Canny算法, 边缘检测

Abstract: Gradient intensity and direction of current pixel is analyzed by the computation of horizontal and vertical gradient in Canny algorithm. Some mistakes may be made in the complex region for the incomplete information provided by horizontal and vertical adjacent pixels. The Canny algorithm based on directional filter is implemented. The new algorithm is described with some examples and the comparison between the old and the new method proves the new algorithm has advantage in the ability to detect edges and keep edges. And the change of parameters has a slight effect on the new algorithm.

Key words: directional filter, Canny algorithm, edge detection

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