Noise - the great foe

Statistical noise is ever-present. To combat it, we must understand our foe. Such "understanding" is termed a model or a simulation. It allows us to demarcate what we want and what we not want - signal versus noise.

The animated image shows a range of extended and point-like objects. Then a noisy version is shown. Following that a noise-cleaned version is shown, which approximates well to the original. The difference between noisy and denoised shows an image which comes very close to pure (Gaussian) noise.