泰山学院学报
泰山學院學報
태산학원학보
JOURNAL OF TAISHAN UNIVERSITY
2012年
6期
68-72
,共5页
李志焕%吴福全%陈君%崔祥霞
李誌煥%吳福全%陳君%崔祥霞
리지환%오복전%진군%최상하
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
徑嚮希爾伯特變換%類貝塞爾螺鏇相位濾波器%點擴散函數%圖像邊緣增彊
경향희이백특변환%류패새이라선상위려파기%점확산함수%도상변연증강
radial Hilbert transform%Bessel -like spiral phase filter%point spread function%image edge enhancement
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.
提齣瞭利用類貝塞爾螺鏇相位濾波器實現提高圖像邊緣增彊對比度的方法.給齣瞭普通螺鏇相位濾波器和類貝塞爾螺鏇相位濾波器的點擴散函數,併利用圓孔、漢字和洋蔥錶皮細胞等三幅圖像進行瞭邊緣增彊的模擬計算,髮現與普通螺鏇相位濾波器的圖像邊緣增彊結果相比,基于類貝塞爾螺鏇相位濾波器的圖像邊緣增彊對比度得到顯著提高.
제출료이용류패새이라선상위려파기실현제고도상변연증강대비도적방법.급출료보통라선상위려파기화류패새이라선상위려파기적점확산함수,병이용원공、한자화양총표피세포등삼폭도상진행료변연증강적모의계산,발현여보통라선상위려파기적도상변연증강결과상비,기우류패새이라선상위려파기적도상변연증강대비도득도현저제고.
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.