| 基于倒谱分析的运动模糊参数估计 |
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| 引用本文： | 郭红伟,朱家兴,寸宁.基于倒谱分析的运动模糊参数估计[J].云南民族大学学报(自然科学版),2012,21(2):150-153. |
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| 作者姓名： | 郭红伟 朱家兴 寸宁 |
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| 作者单位： | 1. 红河学院工学院,云南蒙自,661100
2. 云南省广播电视局昆明实验台,云南昆明,650031 |
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| 基金项目： | 红河学院科研基金(XJ1Y0904) |
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| 摘 要： | 运动模糊是导致图像降质的最常见因素之一,估计运动模糊的点扩散函数是运动模糊复原的前提和关键.分析运动模糊图像频谱和倒谱的特征,提出在倒谱域估计点扩散函数的方法,利用倒谱中2个负峰值点坐标估算模糊尺度,对倒谱取绝对值后用Radon变换检测模糊方向,对运动模糊图像的参数进行估计.实验表明该方法是有效的.
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| 关 键 词： | 图像复原 运动模糊 点扩散函数 倒谱 Radon变换 |
Parameter Estimation of Motion Blur Based on Cepstrum Analysis |
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| GUO Hong-wei
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ZHU Jia-xing
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CUN Ning.Parameter Estimation of Motion Blur Based on Cepstrum Analysis[J].Journal of Yunnan Nationalities University:Natural Sciences Edition,2012,21(2):150-153. |
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| Authors: | GUO Hong-wei ZHU Jia-xing CUN Ning |
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| Institution: | 1.Engineering College,Honghe University,Mengzi 661100,China; 2.Kunming Experiment Station,Yunnan Provincial Administration of Radio and Television,Kunming 650031,China) |
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| Abstract: | Motion blur is one of the most common blurs that degrades images,estimating the parameters of the PSF is necessary for image restoration.For uniform linear motion blurred images,the motion direction and blur extent are two key parameters determining the point spread function.The paper analyzed the characteristics of the spectrum and cepstrum of motion blurred images,and an algorithm which estimated the point spread function in the cepstrum domain was proposed.The coordinate of two negative peak points in cepstrum was used to estimate the blur extent and to obtain the absolute value for cepstrum,and then the Radon transform was employed to find motion direction.The experiments for the parameter estimation of motion blurred images showed the validity of the proposed method. |
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| Keywords: | image restoration motion blur point spread function cepstrum Radon transform |
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