单幅运动模糊图像模糊核参数估计

摘要

Aiming at the problem of the cross-shaped bright lines in the spectrum image due to the edge truncation effect of the Fourier transform and the bright spots which could interrupt the blur parameter estimation, the designed template erosion the binary image of Cepstrum is used to hold on the cross-shaped bright lines and bright spots.Then the original binary image of Cepstrum is used subtract the image which contains only the cross-shaped bright lines, remove the cross-shaped bright lines and bright spots, and then accurate estimation the blur angle of the image of Cepstrum based on Radon transform is conducted.Finally, based on the above fundamental theories, the gray scale change of spectrum image is analyzed to estimate the blur length.Experiments demonstrate that this method is simple, has high estimation accuracy, good robustness.%针对模糊图像傅立叶变换过程由于边缘截断效应在频谱图中产生的十字亮线,和图像中心亮斑对模糊核估计精度干扰的问题,首先利用设计的模版腐蚀二值化倒频谱图,只保留十字亮线和中心亮斑.然后使用原始二值化频谱图减去仅包含十字亮线和中心亮斑的图像,达到剔除十字亮线和中心亮斑的目的,再对所得倒频谱图利用Radon变换准确估计出模糊角度.最后在上述基础之上,分析频谱图灰度变化估计出模糊长度.实验验证,该方法简单可行、精度高、抗噪能力强.