基于边缘曲线光顺的图像放大算法  

Image Magnification Based on Fairing of Edge Curves

作　　者：侯建华[1] 欧宗瑛[1] 栾旭[2] 刘英林[2] 

机构地区：[1]大连理工大学精密与特种加工教育部重点实验室,辽宁大连116024 [2]中国船舶重工集团公司第760研究所,辽宁大连116001

出　　处：《工程图学学报》2006年第4期105-110,共6页Journal of Engineering Graphics

基　　金：国家863计划资助项目(863-306-ZD13-03-6)

摘　　要：针对常规插值方法在图像放大时图像轮廓模糊的问题,提出了一种基于边缘的图像放大算法。算法包括边缘曲线光顺和插值放大两个步骤。第1步使用能量优化方法,从离散的边缘曲线数据恢复成连续而光顺的边缘曲线,这些曲线将图像分为若干个区域;第2步基于这些光顺曲线,针对不同的区域分别进行图像插值放大计算。使用该方法得到的放大图像边缘清晰光顺,实例证明该算法产生的图像质量高于常规算法。Aimed at the blurring in image magnification using conventional methods, an edge-directed image magnification algorithm is presented. This algorithm includes two stages： fairing of edge curves and interpolation magnification. The first stage is the restoration of continuous and fairness of curves from digitized edge data utilizing energy optimization, and to divide the image into several areas by these curves. The second stage is to interpolate and magnify the image for different areas respectively, based On the curves obtained above. Using this algorithm, the contour of the magnified image can keep sharp and smooth. Examples show that the better results can be obtained than the ones of conventional methods.

关 键 词：计算机应用 图像放大 曲线光顺 插值 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]