利用工厂模式实现图元创建机制，给出了图元属性编辑、旋转操作等功能具体设计。
Use the factory model to create graphic element, then realize the function of property editing, operation just as rotation.
通过该系统可以实现照片的自动切割提取、自动倾斜校正，并实现图象亮度、对比度调整，裁剪、旋转、缩放等功能。
Through this system, it is able to cut and extract photo information automatically, correct slant quickly, adjust luminance and chrominance, cut and rotate pictures, and make ratio prints.
说明：画图软件，MFC实现，有图形移动、旋转、选取、删除等功能。
Drawing software, MFC implementation, such as graphics move, rotate, select and delete functions.
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