泊松方程在花式纱线边缘提取中的应用  

Application of Poisson’s Equation in Edge Outlining of Fancy Yarns

作　　者：吴佳[1] 诸葛振荣[1] 

机构地区：[1]浙江大学电气工程学院,杭州310027

出　　处：《丝绸》2006年第10期14-16,共3页Journal of Silk

摘　　要：花式纱线不规则的外形、复杂的材质结构以及丰富的色彩变化,造成对其边缘轮廓提取的困难。文章在泊松方程的基础上,提出一套实现对真实纱线边缘轮廓提取的算法。将花式纱线的数码采集位图划分为确定前景、确定后景和不确定区域,应用有限差分法和Gauss-Seidel迭代法对不确定区域中像素点的不透明系数α值进行计算,判断该像素点属于前景或是属于后景,逐步缩小不确定区域,从而得到细致的纱线边缘曲线。The irregular shape,complicated construct of texture,and abundant changes in colors of fancy yarn make it difficult to realize the outlining of its figure.Based on Poisson’s equation,the paper brings out an arithmetic to realize the edge outlining of fancy yarns.The bitmap of a fancy yarn is devided into three areas: the assured foreground,the assured background,and the unassured area.Applying the finite difference method and Gauss-Seidel interation method to calculate the value of á of the pixels in the un...

关 键 词：花式纱线 边缘轮廓 泊松方程 有限差分法 Gauss-Seidel迭代 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]