Image Restoration Based on the Fractional Fourier Transform
Hong Liu · Jisuanji gongcheng · 2001
The Wiener filter. which can be implement in O(NlogN)time, is suited for time-invariant degradation models. For time-variant and non-stationary processes. however, the optimal linear estimate requires O(N2).Optimal filtering in fractional Fourier domains permits reduction of the error compared, with ordinary Fourier domain filtering for certain types of degradation and noise while requiring O(NlogN) implementation time. Thus, improved performance is achieved at no additional cost. The blurred images that have several different degradation models are restored ill the experiments. The results show that the method presented in this paper is valid.