title: Image correlation at low light levels.
abstract: Low-light-level input images are cross correlated with a classical intensity reference image that is stored in computer memory. Experimental measurements of the correlation signal, obtained using a two-dimensional, photon-counting detector and position-computing electronics, are reported. The experimental results are in good agreement with theoretical predictions.
authors.affiliation: The Institute of Optics, University of Rochester, Rochester, New York 14627, USA.
authors.forename: G M
authors.initials: GM
authors.lastname: Morris
authors.forename: M N
authors.initials: MN
authors.lastname: Wernick
authors.forename: T A
authors.initials: TA
authors.lastname: Isberg