Quantum limits in image processing
  We determine the bound to the maximum achievable sensitivity in the estimation of a scalar parameter from the information contained in an optical image in the presence of quantum noise. This limit, based on the Cramer-Rao bound, is valid for any image processing protocol. It is calculated both in the case of a shot noise limited image and of a non-classical illumination. We also give practical experimental implementations allowing us to reach this absolute limit. 
Vincent Delaubert (ACQAO, LKB - Jussieu), Nicolas Treps (LKB -   Jussieu), Claude Fabre (LKB - Jussieu), Hans A. Bachor (ACQ...