ممكن توضيح للمطلوب وكيف يتم كتابته بالماتلاب

Using an image of your choice, perform the following,
(a) Corrupt the image with white Gaussian noise so that the SNR of the image is approximately 5 dB. Find the actual SNR of the corrupted noise. Display the original and corrupted noise.
(b) Filter (choose an appropriate one) your clean image and your corrupted noise in the time domain. Display the filtered image and find its SNR.