计算机应用 ›› 2013, Vol. 33 ›› Issue (06): 1695-1700.DOI: 10.3724/SP.J.1087.2013.01695

• 多媒体技术 • 上一篇    下一篇

强噪声干扰下的对数极坐标空间边缘提取算法

文鹏程1,张亚棣1,王向军2   

  1. 1. 中国航空工业集团 西安航空计算技术研究所,西安 710119
    2. 天津大学 精密仪器与光电子工程学院,天津 300072
  • 收稿日期:2012-12-27 修回日期:2013-02-16 出版日期:2013-06-01 发布日期:2013-06-05
  • 通讯作者: 文鹏程
  • 作者简介:文鹏程(1981-),男,湖南长沙人,工程师,博士,主要研究方向:图形图像处理;张亚棣(1968-),男,江西南昌人,研究员,博士,主要研究方向:计算机体系结构、嵌入式软件;王向军(1955-),男,黑龙江哈尔滨人,教授,博士,主要研究方向:计算机视觉、模式识别。
  • 基金资助:

    国家自然科学基金资助项目(60872092);中航工业计算所创新基金资助项目(CXXM12072-16)

Algorithm of edge extraction in intensively noisy log-polar space

WEN Pengcheng1,ZHANG Yadi1,WANG Xiangjun2   

  1. 1. Computing Technique Research Institute, Aviation Industry Corporation of China, Xi’an Shaanxi 710119, China
    2. College of Precision Instrument and Opto-Electronics Engineering, Tianjin University, Tianjin 300072, China
  • Received:2012-12-27 Revised:2013-02-16 Online:2013-06-05 Published:2013-06-01
  • Contact: WEN Pengcheng

摘要: 准确提取对数极坐标空间的目标边缘信息是对数极坐标变换视觉不变性获得成功应用的前提和关键。由于传统的边缘提取算法无法满足强噪声干扰下的单像素精度要求,在主动轮廓模型和水平集方法的基础上,设计了一种独特的边缘提取算法。经融合Canny算子的水平集方法全局降噪,利用能量驱动的主动轮廓模型逐次演化逼近,提取可能的边缘曲线,通过改进型跟踪寻迹剔除虚假信息,即可得到最终的目标边缘。实验表明,该算法行之有效,边缘提取特征相似度达96%以上。

关键词: 边缘提取, 对数极坐标空间, 主动轮廓模型, 水平集方法, 跟踪寻迹

Abstract: Accurate extraction of a target’s edge in a log-polar space is a precondition and key point to successfully apply the visual invariance of the log-polar transformation. Since it is impossible for traditional algorithms to extract the single-pixel edge in an intensively noisy environment, a unique edge extraction algorithm on the basis of active contour model and level set method was designed. After noise removal on the whole via Canny operator based level set method, the energy-driving active contour model was used to iteratively approach the potential edges. By clearing out false edges with an improved tracing way, the true target’s edge was extracted finally. The experimental results demonstrate the effective performance of the proposed algorithm with the edge feature similarity up to 96%.

Key words: edge extraction, log-polar space, active contour model, level set method, tracing way

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