As far as I understand,
Suppose, we have a 2D image of pixel resolution 200 x 300. That means, the image has 60000 pixels in it.
Now, we would generate $n$ random values and add those values to $n$ number of random pixels.
Now, my question is, what would make those $n$ values to look like Gaussian Random Values?
What would be the logic that I should use?