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Adaptive noise cancellation technology has been widely applied in all fields. The techniques are ideally suited for reducing spatially varying noise. For some fields noise is generally uncorrelated, in contrast to the useful signal. Adaptive filtering algorithms exploit the correlation properties of signals to enhance the signal-to-noise ratio of the output signal. However, in the case with few prior...
A salt & pepper noise fast filtering algorithm for grayscale images based on neighborhood correlation detection is presented. By utilizing a 4×4 pixel template, the algorithm can discriminate and filter various patterns of salt & pepper noise spots or blocks within 2×2 pixel size range. In contrast with many kinds of median filtering algorithm, which may cause image blurring, it has much higher...
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