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How does the despeckle work in image j?

Updated: 4/28/2022
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13y ago

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Despeckle

This is a median filter. It replaces each pixel with the median value in its 3 x 3 neighborhood. This is a time consuming operation because, for each pixel in the selection, the nine pixels in the 3×3 neighborhood must be sorted and the center pixel replaced with the median value (the fifth). Median filters a good at removing salt and pepper noise. from imageJ wiki

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Q: How does the despeckle work in image j?
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