Function imageproc::noise::salt_and_pepper_noise_mut

pub fn salt_and_pepper_noise_mut<P>(image: &mut Image<P>, rate: f64, seed: u64) where
    P: Pixel + HasBlack + HasWhite + 'static, 

Converts pixels to black or white in place at the given rate (between 0.0 and 1.0). Black and white occur with equal probability.