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The sensitivity to the spectral estimate of the original image of linear minimum mean-square error (LMMSE) color image restoration methods is determined. It is concluded that (i) sensitivity of the full-correlation Wiener restoration to the spectral estimate is higher than that of the independent-channel Wiener restoration, and the full-correlation restoration is extremely sensitive to windowing, (ii) among independent-channel restorations, the ones based on autoregressive spectral estimates are the least sensitive, and (iii) full-correlation Wiener restoration may be outperformed by the independent-channel restoration depending on the prototype image used in spectral estimation.>
Trussel et al. (Tue,) studied this question.
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