Example: Use of Median Filtering for Noise Reduction abc FIGURE 3.35 (a) X-ray image of circuit board corrupted by salt-and-pepper noise. (b) Noise reduction with a 3 × 3 averaging mask. (c) Noise reduction with a 3 x 3 median filter. (Original image courtesy of Mr. Joseph E. Pascente, Lixi, Inc.) 3/8/2021 68