基于新型螺旋相位滤波器提高图像边缘增强对比度的方法  

Improving The Contrast of Image Edge Enhancement with A New Spiral Phase Filter

作　　者：李志焕[1] 吴福全[1] 陈君[2] 崔祥霞[2] 

机构地区：[1]曲阜师范大学激光研究所,山东曲阜273165 [2]泰山学院物理与电子工程学院,山东泰安271021

出　　处：《泰山学院学报》2012年第6期68-72,共5页Journal of Taishan University

基　　金：国家自然科学基金(61107012);山东省自然科学基金(2R2011FQ023);泰安市科技发展计划项目(20112005)

摘　　要：提出了利用类贝塞尔螺旋相位滤波器实现提高图像边缘增强对比度的方法.给出了普通螺旋相位滤波器和类贝塞尔螺旋相位滤波器的点扩散函数,并利用圆孔、汉字和洋葱表皮细胞等三幅图像进行了边缘增强的模拟计算,发现与普通螺旋相位滤波器的图像边缘增强结果相比,基于类贝塞尔螺旋相位滤波器的图像边缘增强对比度得到显著提高.A new type of Bessel - like spiral phase filter for improving the contrast of image edge en- hancement was introduced. The analytical expressions to describe the point spread function of conventional Bessel -like spiral phase filters with topological charge were given and the edge enhancement for three differ- ent images such as circular aperture, Chinese character and onion epidermal cells were simulated. The results show that compared with the results of image edge enhancement of the conventional spiral phase filter, the con- trast of image edge enhancement with Bessel - like spiral phase filter is obviously higher.

关 键 词：径向希尔伯特变换 类贝塞尔螺旋相位滤波器 点扩散函数 图像边缘增强 

分 类 号：TN911.74[电子电信—通信与信息系统]