Image denoising
This algorithm may not be very competent but it still gave appreciable results as I made them on my own
without any background on image processing. What I have done is, First found out the irregular value in
3X3 matrix, which could possibly be noise. By irregular value I mean, the value which is 20 (this factor can
be varied to study its effect) units farther from its neighborhood. Then we substitute the mean of regular
values in the matrix to the irregular value.