Gabor变换估计运动模糊方向角

THE ESTIMATION OF MOTION BLUR DIRECTION BY GABOR TRANSFORM

提出了一种新的估计运动方向角的方法,它从运动模糊图像的Fourier频谱出发,利用Gabor变换聚焦特征,运用适当的线检测方法估计出运动方向角.数值结果表明,该估计是十分有效的.在无噪声情形下,它提高了的估计精度,在小噪声干扰下,它也能得到较准确的结果.

Motion blur is one of the most common causes for image degradation. Restoration ot sucn motion blurred images is highly dependent on accurate estimation of motion blur parameters. For simple linear motion blur,relevant parameters include motion length （L） and motion direction （θ）. In this paper, a new algorithm based on Gabor transform is presented. Utilizing the focalization function of Gabor transform, motion direction is estimated from Fourier spectrum of blurred images by linear detection. Numerical results show that this method works well. The precision of such estimates is improved for noise--free cases, and tolerable for cases with reduced noise.