Three-dimensional disk-based optical correlator

Three-dimensional disk-based optical correlator

Multi-channel disk- based optical correlator

Angularly multiplexed transmission holograms were recorded at multiple spots on a photopolyrner coated disk. By imaging in the "along track" direction and Fourier transforming in the radial direction when recordmg and presenting images, disk rotation can be used to generate the 2-D correlation functions between stored templates and presented images. The correlation functions for holograms multi...

Three-dimensional optical correlator with general complex filters.

A new type of electro-optical three-dimensional (3-D) correlator is proposed and demonstrated. A 3-D object scene, observed by multiple cameras from several points of view, is correlated with a 3-D complex computer-generated function. This correlator is a hybridization of the joint transform and the VanderLugt correlators, and, as such, it allows correlations to be made between 3-D real-world o...

Three-dimensional joint transform correlator.

The three-dimensional (3-D) joint transform correlator is demonstrated with realistic targets. Three-dimensional objects observed by multiple cameras are correlated with a 3-D reference object. The number of cameras and their directions of observation are particularly considered.

All optical three dimensional spatio-temporal correlator for automatic event recognition using a multiphoton atomic system

We describe an automatic event recognition (AER) system based on a three-dimensional spatio-temporal correlator (STC) that combines the techniques of holographic correlation and photon echo based temporal pattern recognition. The STC is shift invariant in space and time. It can be used to recognize rapidly an event (e.g., a short video clip) that may be present in a large video file, and determ...