基于Radon变换的运动模糊方向估计的改进方法

Improved identification of the motion blur direction based on Radon transform

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。

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.