Point-spread function (PSF) plays a key role in image restoration.As a result, prior knowledge and posteriori estimation of PSF is usually used to restore image.

• 在图像恢复技术中，点扩展函数(PSF)是影响图像恢复结果的关键因素，所以常常利用先验知识和后验判断方法估计PSF函数来恢复图像。