Accession Number : ADD011774

Title :   Kalman Filter Preprocessor.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE AIR FORCE WASHINGTON DC

Personal Author(s) : Giles, M K ; Rogers, R B

Report Date : 16 Apr 1985

Pagination or Media Count : 7

Abstract : This document describes an optical signal preprocessor for computing the input functions required to utilize an extended Kalman filter algorithm. An incoming stream of time-varying images is integrated to form a reference image, which is then subtracted from each subsequently sampled image. The result is digitized for use with the extended Kalman filter algorithm. THe reference image is also fed through a spatial filter and then input to two light valve image subtraction systems to produce difference image approximations of two partial derivatives. These derivative functions are then digitized and utilized as inputs to the extended Kalman filter algorithm. (Author)

Descriptors :   *PATENTS, *PREPROCESSING, *KALMAN FILTERING, *OPTICAL IMAGES, *SIGNAL PROCESSING, *ALGORITHMS, SPATIAL FILTERING, INPUT, COMPUTATIONS

Subject Categories : Computer Hardware

Distribution Statement : APPROVED FOR PUBLIC RELEASE