Importance Sampling-Based Unscented Kalman Filter for Film-Grain Noise Removal
G. R. K. S. Subrahmanyam, Ambasamudram Narayanan Rajagopalan, Rangarajan Aravind · IEEE Multimedia · 2008
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.