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

摘要

The present invention concerns a method for extracting a random signaturefrom a subject material element, comprising:.cndot. a phase to generate at least one acquisition vector of structuralcharacteristics of at least one region of the subject material element,.cndot. a phase to generate at least one random signature vector from theacquisition vector, the random signature vector comprising :.cndot. at least one random component having a stable nature so that itsvalue may be found on each implementation of the method onone same region of the subject material element,.cndot. and/or at least one random component having an unstable natureso that its value is likely to vary random fashion on eachimplementation of the method on one same region of the subjectmaterial element,.cndot. use of the random signature vector as random signature.