Salt-and-pepper noise[edit]
Main article: Salt and pepper noise
Image with salt and pepper noise
Fat-tail distributed or "impulsive" noise is sometimes called salt-and-pepper noise or spike noise.[6] An image containing salt-and-pepper noise will have dark pixels in bright regions and bright pixels in dark regions.[7] This type of noise can be caused by analog-to-digital converter errors, bit errors in transmission, etc.[8][9] It can be mostly eliminated by using dark frame subtraction and interpolating around dark/bright pixels.
Dead pixels in an LCD monitor produce a similar, but non-random, display.[10]