A New Method for Realizing LOG Filter in Image Edge Detection

摘要：

LOG filter for image edge detection consists of Gaussian filter and Laplace operator. Based on the central limit theorem and the separating characteristic of two dimensional Gaussian filter, Gaussian approximation filter is constructed. The digital filtering algorithm for Gaussian approximation filter is concluded through the bilinear transformation method and zero phase shift filtering technology. The algorithm combined with the Laplace operator has been successfully applied in the implementation of LOG filtering for edge detection. Applying Gaussian approximation filter in LOG filtering is helpful for multi-scale LOG filtering because only one parameter in the algorithm needs to be changed. This method is more convenient than the template method in which the coefficients of the whole mask of LOG filter with different scale need to be refreshed. This is a new implementation for LOG filter.

关键词： LOG filter Gaussian filter Laplace operator Image edge detection

作者: Xu Jingbo Liu Bo Lin Haijun Li Jianxin

作者单位: College of Measure-control Technology & Communication Engineering,Harbin University of Science and Technology,Harbin 150080 The higher educational key laboratory for Measuring & Control Technology and Instrumentations of Heilongjiang Province,Harbin 150080

会议类型: 国际会议

会议名称: The 6th International Forum on Strategic Technology(IFOST 2011)(第六届国际战略技术论坛)

会议地点: 哈尔滨

会议语种:英文

页码: 733-737

在线出版日期: 2011-08-22（万方平台首次上网日期，不代表论文的发表时间）