【摘要】 本文在对J.R.Ullmann叙述的一种二值图象边缘跟踪算法进行理论分析的基础上,指出了该算法的适用范围和存在的问题,提出了一种修改算法并进一步从理论上加以证明。用本文的方法来跟踪印刷体汉字的轮廓边缘,提取汉字轮廓的链式方向码序列,取得了令人满意的结果。计算机模拟和实际扫描实验表明,修改的二值图象边缘跟踪算法能够克服文中算法所存在的问题,是一种有效和实用的二值图象边缘跟踪算法。更多还原

【Abstract】 Based on the theoretical analysis of the edge tracking algorithm for binary images described by J. R. Ullmann, its efficient range and shortcomings were pointed out. Furthermore, an improved algorithm is put forward and shown theoretically. Using the method described in this paper the edges of printed Chinese Characters were tracked down to extract the sequence of their chain direction code, and the results were satisfactory. After computer simulation and scanning experiment, it is shown that the improved edge tracking algorithm for binary images can overcome the shortcoming of the algorithm described by J. R. Ullmann and is very efficient.更多还原