Photographic film contains film-grain noise that translates to multiplicative, non-Gaussian noise in the exposure domain. A method based on the unscented Kalman filter can suppress this noise while simultaneously preserving edge information.
['G. R. K. Sai Subrahmanyam', 'A. N. Rajagopalan', 'R. Aravind']
Importance Sampling-Based Unscented Kalman Filter for Film-Grain Noise Removal