中文摘要：

为了有效地进行运动模糊图像的复原处理，研究了模糊图像点扩散函数（PSF）的两个关键模糊参数——模糊方向（角度）和模糊尺度的估计，重点研究了运动模糊方向的精确估计。针对模糊图像频谱中十字亮线对方向估计的干扰问题，给出了基于Radon变换的运动模糊方向估计方法的改进方法。该方法根据频谱图像中心条纹尺度信息，自适应调节形态学腐蚀算子的执行次数，有效克服十字亮线对检测精度的干扰，最后利用Radon变换得到运动模糊方向的精确估计。试验结果验证了该方法的正确性和有效性。

英文摘要：

To effectively realize the restoration of motion-blurred images, the study focused attention on the estimation of two key parameters of blurred images＇ point spread function （ PSF）, the motion blur direction （angle） and the blur extent, especially on the accurate identification of the motion blur direction. To eliminate the disturbance from the dominant cross-shaped bright lines showing up in the Fourier spectrum of the real blurred images, the identifi- cation of the motion blur direction based on Radon transform was improved. The improved method performs an a- daptive erode strategy on binary Fourier spectrum images according to the scale of central stripe to eliminate the de- tection interference surfer from the cross-shaped bright lines. And the Radon transform is performed to estimate the motion blur direction accurately. The correctness and effectiveness of the proposed method were verified by the experiment.