扫描仪软件中插值算法的应用  

Application of interpolation algorithm in scanner software

作　　者：张杨[1] 刘白林[1] 

机构地区：[1]西安工业大学计算机科学与工程学院,西安710032

出　　处：《国外电子测量技术》2007年第10期30-32,共3页Foreign Electronic Measurement Technology

摘　　要：针对扫描仪软件中对扫描到的图像进行旋转和缩放操作时,会导致非整数坐标出现,无法直接获得其精确的灰度值的现象,提出了采取近似算法处理,将最邻近、双线性、三次卷积插值算法运用到其中,并从计算公式与优缺点方面进行比较的方法。以标准Lena图旋转35°为例,3种插值算法得到不同的效果。实例表明,三次卷积插值算法达到平滑图像边缘、消除锯齿和减少图像模糊程度的目的。When rotating and zooming scanned image with scanner software, non-integer coordinate could occur so as to result in imprecise gray values. To solve this problem, we propose approximation algorithms including the nearest neigh-bout, bilinear and cubic convolution interpolation, Comparison on calculation formula and advantages of three algorithms are also given, Take a standard Lena rotation 35° for instance, three interpolation algorithms put up different effects. The experimental result shows cubic convolution interpolation has more outstanding feature which can effectively smoothes edges, eliminates serrated edges and decreases images fuzzy.

关 键 词：扫描仪 最邻近插值 双线性插值 三次卷积插值 

分 类 号：TP182[自动化与计算机技术—控制理论与控制工程]