Introduction - If you have any usage issues, please Google them yourself
Write MATLAB functions that take two grayscale images as input, and calculate the
following image difference metrics:
Mean Squared Error (MSE)
Signal to Noise Ratio(SNR)
Peak Signal to Noise Ratio (PSNR)
Mean Absolute Error (MAE)
Process the given test images “Lena” with its original and after-adding-noise