4. (0.5 Fourier) Matlab assignment Download the image I1 (namedbrain.mat) from piazza and load it into Matlab (Matlab command:load brain.mat), then perform the following tasks:
(a) Add Gaussian white noise with variance equals to 60 to I1 togenerate a noisy image I2, show I1 and I2 and compute the SNR andPeak SNR between I1 and I2.
(b) Create three Gaussian filters with σ = 1, 2, 3, convolve thenoisy image I2 with each filter and display the results. Thencompute the SNR and Peak SNR between I1 and the denoised images
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