Description: The majority of image denoising methods, especially for Gaussian white noise of the de-noising method, essentially, are low-pass filtering method. Low-pass filter is a double-edged sword, in the elimination of image noise at the same time, will be useful to eliminate some of the high frequency image information. Therefore, various image denoising methods, in fact, is useful in de-noising and retain high-frequency trade-off between information
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