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结合直线链码的特征和机械图纸图象的特点,将Freeman准则具体化,提出并证明了直线链码矢量化具体应用的三原则,提出了基本方向码、错位方向码和基本方向链码段的概念,最后提出了直线链码段开始与结束的预测理论判据及基于直线链码的预测矢量化算法和迭代过程.
Combining the characteristics of linear chain code and mechanical drawing images, the Freeman criterion is embodied and the three principles of concrete application of linear chain code vectorization are proposed and proved. The basic directional code, misorientation code and basic directional code segment The paper puts forward the theory of predicting the start and end of linear chain code segment and the predictive vectorization algorithm and iterative process based on linear chain code.