Write a MATLAB script which reads, converts a color image into grayscale image, and performs median filter and adaptive filter. You are not allowed to use any existing functions such as medfilt2, ordf

Write a MATLAB script which reads, converts a color image into grayscale image, and performs median filter and adaptive filter. You are not allowed to use any existing functions such as medfilt2, ordfilt2, wiener2. Note that the neighboring region can be changed, e.g., 3x3, 5x5, or 7x7. Please discuss/elaborate on each filtering method (median and adaptive filters).