Median FilterThe Median filter is used to remove noise from an image by replacing pixels with the middle pixel value selected from a certain window size.
For example, given the grayscale 3x3 pixel window;
Pixels sorted based on intensity: 0, 22, 48, 77, , 77, 150, 158, 219
The center pixel would be left at 77 since 77 is the middle value of the sorted list of pixels.
The median filter is very effective at removing noise while not destroying sharp edges in an image.
1. Select the window size of the median filter
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