Non Photo realistic rendering of images based on paper "Stylization and Abstraction of Photographs" by Doug DeCarlo and Anthony Santella

该画图软件的基本功能包括点、线、图像的绘制，在绘制过图形之后，利用填充工具能对该图形进行填充，并能够选择颜料盒中颜色，对封闭区域中填充指定的颜色。-The drawing software, the basic features include point, line, image rendering, the draw-off graphics, the use of the fill tool can be filled with graphics, and can choose the c