Accession Number : ADD008218

Title :   Real-Time Transformation of Incoherent Light Image to Edge-Enhanced Darkfield Representation for Cross-Correlation Applications.

Descriptive Note : Patent Application,

Corporate Author : DEPARTMENT OF THE ARMY WASHINGTON DC

Personal Author(s) : Smith,James L

Report Date : 21 Nov 1980

Pagination or Media Count : 25

Abstract : Cross-correlation of an image with a reference pattern is done in order to determine recognizable content and gives a sharp correlation peak whenever both image and pattern are edge-enhanced, darkfield representations. Incoherent light, conventional optics and electronics are used to obtain edge-enhanced, darkfield representations which are obtained by sensing the light from the object through a dual-aperture unit to a lens so that a recording medium located forward of the focusing plane of the lens will receive light blocked alternately by the regular (perimeter) stop and the central stop and will record the difference. (Author)

Descriptors :   *Patent applications, *Image processing, *Cross correlation, *Pattern recognition, Electrooptics, Correlation techniques, Peak values, Sharpness, Real time, Transformations, Light, Spatial filtering, Fourier transformation

Subject Categories : Electrooptical and Optoelectronic Devices

Distribution Statement : APPROVED FOR PUBLIC RELEASE