Method, system and apparatus for determining a hash code representing a portion of an image

A method of determining a hash code representing a portion of an image, is disclosed. A Delaunay region (e.g., 450) enclosing an image feature point (e.g., 210) representing at least the portion of the image is determined. The Delaunay region is determined from A* lattice points. A mapping transform...

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Bibliographic Details
Main Authors TONISSON ALAN VALEV, RUDKIN SCOTT ALEXANDER, DRAKE BARRY JAMES
Format Patent
LanguageEnglish
Published 03.11.2015
Subjects
CALCULATING
COMPUTING
COUNTING
ELECTRIC DIGITAL DATA PROCESSING
HANDLING RECORD CARRIERS
IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
PHYSICS
PRESENTATION OF DATA
RECOGNITION OF DATA
RECORD CARRIERS
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Summary:A method of determining a hash code representing a portion of an image, is disclosed. A Delaunay region (e.g., 450) enclosing an image feature point (e.g., 210) representing at least the portion of the image is determined. The Delaunay region is determined from A* lattice points. A mapping transforming the Delaunay region to a predetermined canonical form is determined A point of the Delaunay region is received. The received point defines a plane containing the A* lattice points of the Delaunay region excluding the received point. A normal of the plane is determined by setting at least two co-ordinates of the normal to predetermined non-zero values, the two co-ordinates being selected according to the determined mapping. The hash code representing a portion of the image is determined according to a distance determined using the normal.
Bibliography:Application Number: US201313864639