The classification of class in interactive graphic system is proposed firstly by the basic primitive class, static aggregation class and dynamic aggregation class.

首次提出将交互式图形系统中各种图形对象类划分为基本图元类、静态聚合对象类和动态聚合对象类的分类分法。

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This paper proposes a rapid algorithm to OCR image slant correction, which applies the graphic primitive recognition technique and then keeps track of the character center-line.

提出了一种基于文本图元识别以跟踪字符中心线的高精度矫正ocr图像倾斜的快速算法，该算法思想虽然简单，却具有高效和高精度的特点，同时还具有高可靠性和良好的抗噪特征。

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