METHOD FOR EXTRACTING RANDOM SIGNATURES FROM A MATERIAL ELEMENT AND METHOD FOR GENERATING A DECOMPOSITION BASE TO IMPLEMENT THE EXTRACTION METHOD

摘要

The method involves generating acquisition vectors of structural characteristics of a region of a material element separate from a subject material element (1) and/or from the subject material element itself. All the acquisition vectors are analyzed using statistical methods to obtain a decomposition base formed of decomposition vectors. The vectors enable a representation of each acquisition vector in a form of an image vector of which each component corresponds to a contribution of a decomposition vector in the acquisition vector. Independent claims are also included for the following: (1) a method for extracting a random signature from a subject material element (2) a device comprising acquisition unit, processing unit and memory unit, the processing and memory unit that is adapted to implement the random signature extraction method (3) a computer program having a set of instructions for performing a base decomposition generating method.