一位学长做的毕业设计，是一个画图板。画直线、画任意线、画曲线、用颜色填充区域或对象。图像几何变换：平移、旋转、放缩。图像效果处理：边缘提取、消除噪声、素描效果、图像锐化、图像复原。-Graduating seniors to do a design, a drawing board. Draw a straight line, draw an arbitrary line, a curve, area or object with a color fill. Image geometric tr