说明：  1. 点扩散(PSF)函数创建运动模糊图像； 2. 分别采用逆滤波、维纳滤波和约束最小二乘方滤波对模糊图像进行复原。
(The 1. point diffusion (PSF) function is used to create a motion blurred image. 2., we use inverse filtering, Wiener filter and constrained least square filter to restore the blurred image.)