Re: Noise generation - salt and pepper

Add i.i.d. (independent and identically distributed) noise with a Cauchy
distribution of zero median to the image.

The Cauchy distribution is:

(1/PI)(1/(1+X^2)

and generated via

X = tan(PI*(U-0.5))

where

X is uniform on [0,1]

X should then be scaled by trial and error to give a visually acceptable
result.


.

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