For example, let’s add salt and pepper noise to a given image using the imnoise() function and then smooth it using the medfilt2() function. If the second argument is not given, the function will use the default value, which is 3-by-3. The first argument of this function is the image you want to smooth, and the second argument is the m-by-n neighborhood value around the pixel of the input image. If you want to remove noise or to smooth your image, you can use the medfilt2() function to create and apply the median filter to smooth the given image. Create and Apply the Median Filter Using the medfilt2() Function in MATLAB This tutorial will introduce how to create and apply the median or averaging filter using the medfilt2(), fspecial(), and imfilter() function in MATLAB.
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