基于Level Set方法的西夏字轮廓提取

随着国内外对西夏研究的不断深入,收藏于世界各地的大批西夏古籍文献通过影印方式陆续出版。如何将这些西夏古籍文献进行数字化、文本化则有着极其重要的意义。首先利用平滑和细化算法对西夏影印文献进行了预处理,然后利用Level set方法对影印文献中的西夏字进行了轮廓提取。Level Set演化函数在空间方向上采用了四阶紧致差分逼近式离散,计算过程中加入了窄带算法及全局优化方法。实验表明,算法在不增加计算时间的基础上可以得到较精确的西夏字轮廓。

Contour Extraction of Xixia Characters Based on Level Set

Recently,researches on Xixia characters develop so much and a large number of Xixia documents have been published with their original forms at home and abroad.How to carry out the fast digitalization of those documents is of great importance.Based on the level set technique,we first process those documents by the smooth algorithm, and then the contours of Xixia characters are extracted by Level set.Level Set evolutionary function is descritized by the fourth-order symmetrical compact finite different scheme...