说明：  本程序是对一幅图像进行变灰度、旋转、锐化、在图像上画圆或椭圆、直线等操作的程序。 说明：要实现相应功能的操作，需要在输入框内输入正确的表达式。举例如下： 画直线：x1=20,y1=15,x2=150,y2=100 画圆：x=100,y=100,r=20 画椭圆：x=100,y=100,r=20,a=16,b=9 旋转：x=30(度数)，ax=100,ay=90 锐化：x=80
(this procedure is a gray image change, rotation, sharpening the image on the Circle or ellipse, straight line operational procedures. Note : To realize the corresponding function, the operation needs input box to input the correct expression. For example : painting line : 20 = x1, y1 = 15, = 150 x2, y2 = 100 Circle : x = 100, y = 100, r = 20 paintings elliptical : x = 100, y = 100, r = 20, a = 16, b = 9 rotation : x = 30 (degree), the ax = 100, ay = 90 Sharpening : x = 80)