Spatial gaussian filtering
(a) Low pass 3x3 mask. σ 2 = 1, 2, 3, .....10.
(b) Low pass 5x5, 7x7, ... mask.
(c) High pass filter 3x3 mask.
(d) Vary window size of high pass filter.
(e) Unsharp mask in a single step.
To create the input, add noise to the image.
(a) Can use MATLAB functions for noise image generation.
(b) Gaussian noise, vary the percentage of noise.
(c) Insert salt and pepper noise. You can chose some random percentage.