匀速直线运动模糊的RSF之估计

点扩展函数的设置是影响图像恢复结果好坏的关键问题。对于匀速直线运动模糊,要得到好的恢复效果必须能够正确估计模糊范围D和运动模糊方向。在文献[2]中用带最优窗的维纳滤波方法有效地去除了噪声和减小了边缘误差，除了边缘的L－形条带外可得到近乎完善的恢复效果；并且证明了对任意方向的直线运动模糊图像的恢复只能直接设置二维点扩展函数进行二维恢复，不可先进x方向的一维恢复再进行y方向的一维恢复。该文进一步给出了估计模糊范围D和运动方向的频谱方法：模糊范围D和图像中心与相邻黑线间的距离uo成反比；运动方向与模糊图像G（u,v)的频谱中的平行条带垂直。

ESTIMATING THE PSF OF MOTION-BLURRED IMAGES

Setting the point spread function of real-world motion-blurred images is the key problem in image restoration. In, I have used optimal windows for image restoration and obtained near-perfect restorations, and proved that we can only directly set up two dimensional point spread function, instead of first restore in X direction and then in Y direction. This correspondence further provides the procedure for estimating blur range and direction.