曲线三次样条涉及到数值分析啊，不知道GDI里面有没有现成的函数，用贝塞尔曲线画也能够实现光滑效果！(Curve three times the sample involves the numerical analysis ah, do not know GDI there is no ready function, with the Bezier curve painting can also achieve smooth effect!)

1、使用GDI+库读取图片； 2、对图像进行灰度处理 3、对正常图像进行鱼眼效果处理(mfc ui, gdi+ read image, grey convert, fish eye convert)