To Use the Median Filter on a Selected Image

1. On the ribbon, click Raster Tools tab Edit panel Process Image drop-down menu Convolve.
2. Click Smoothing Filters.
3. Click Expand All to expand the filter list.
4. Click Median Filter.
5. Click Run Filter to filter the image(s).
6. Enter a filter (or matrix) size. This filter uses a matrix for smoothing the pixels. For example, a filter size of 3 would filter each pixel by averaging the values of the 8 surrounding pixels.
   Note: The filter size must be an odd number.
7. Click OK to apply the filter.