Restoration of defocus blurred digital image using wiener filter in frequency domain

The degradation model for defocus blur image can be depicted by uniformly distributed function on circular support region whose radius is model parameter.The blur radius can be estimated using zeros position in blur image in frequency domain.Restoration of defocus blur image by simplified Wiener deconvolution method is presented in this paper.Experimental results show that the approaches can obtain the good restoration effects in less computation time,which is suitable for fast restoration of defocus blur digital image with high Signal-to-Noise Ratio.