CAJ | 학술논문

针对运动模糊图像的模糊方向估计易受频谱中心十字亮线和图像尺寸影响的问题，详细分析了匀速直线运动模糊图像的退化模型。通过对点扩散函数的公式推导，找到了图像尺寸与模糊方向间的关系，提出了一种基于中轴探测的运动模糊方向估计方法。该方法首先对模糊图像进行傅里叶变换及动态压缩得到频谱图，然后对频谱图进行预处理，以消除中心十字亮线的影响，最后根据推导出的公式计算得到运动模糊方向的估计。仿真实验表明，该方法简单、准确，克服了图像长宽比对估计结果的影响，且具有较强的鲁棒性和较高的时间效率。
침대운동모호도상적모호방향고계역수빈보중심십자량선화도상척촌영향적문제，상세분석료균속직선운동모호도상적퇴화모형。통과대점확산함수적공식추도，조도료도상척촌여모호방향간적관계，제출료일충기우중축탐측적운동모호방향고계방법。해방법수선대모호도상진행부리협변환급동태압축득도빈보도，연후대빈보도진행예처리，이소제중심십자량선적영향，최후근거추도출적공식계산득도운동모호방향적고계。방진실험표명，해방법간단、준학，극복료도상장관비대고계결과적영향，차구유교강적로봉성화교고적시간효솔。
The blur direction estimation of motion blurred image is vulnerable to be influenced by the bright cross line in spectrum centre and the image size.To address this problem,we analyse in detail the degradation model of uniform speed linear motion blur image.Through the formula derivation on point spread function,the relation between the image size and the blur direction is found,and then a motion blur direction estimation method based on medial axis detection is presented.First,the method applies the Fourier transform and dynamic compression on the blur image to get the spectrogram.Then in order to eliminate the effect of the bright centre cross line,the pretreatment on the spectrogram is executed.Finally,the estimation of motion blur direction is calculated by the deduced formula.Simulation experiments show that the method is simple and accurate,it overcomes the impact of image aspect ratio on estimation result,and has stronger robustness and higher time efficiency.