give me a description about the code below

function im_o = Add_noise( im, v )

seed = 0; randn( 'state', seed ); noise = randn( size(im) ); % noise = noise/sqrt(mean2(noise.^2)); im_o = double(im) + v*noise; function im_o = Add_noise( im, v )

[dpb]

I'd described it as poorly/not formatted.

What, specifically, is the question?