Method for indexing and identifying multimedia documents

Details Method for indexing and identifying multimedia documents Method for indexing and identifying multimedia documents

G - Physics

06

F

G06F 17/30 (2006.01)

Patent

CA 2547557

The method for indexing multimedia documents comprises the following steps: (a) identification and extraction, for each document, of terms ti comprising vectors characterizing the properties of the document; (b) storage of terms ti in a term base comprising P terms; (c) determination of a maximum number N of desired concepts including the most relevant terms ti; (d) calculation of the matrix T of distances between the terms ti of the term base, (e) decomposition of the set P of terms ti of the term base into N parts Pj (1=j=N) such that P = P1 UP2 UPj UP<SB>N</SB>, each part Pj comprising a set of terms tij and being represented by a concept cj, terms ti being divided in such a manner that the furthermost terms are located in distinct parts Pl, Pm and the nearest terms are located in the same part Pl; (f) structuring of the dictionary of concepts and (g) construction of a prints base consisting of the set of concepts ci representing the terms ti of said documents, each document being associated with a print which is proper thereto.

Le procédé d'indexation de documents multimédias comprend les étapes suivantes : (a) identification et extraction pour chaque document de termes t¿i? constitués par des vecteurs caractérisant des propriétés du document ; (b) stockage des termes t¿i? dans une base de termes comprenant P termes ; (c) détermination d'un nombre maximum N de concepts souhaités regroupant les termes t¿i? les plus pertinents ; (d) calcul de la matrice T de distances entre les termes t¿i? de la base de termes, (e) décomposition de l'ensemble P des termes t¿i? de la base de termes en N parties P¿j? (1<=j<=N) telles que P = P1 UP¿2? ~ UP¿j? ~ UP¿N?, chaque partie P¿j? comprenant un ensemble de termes t¿ij? et étant représentée par un concept c¿j?, les termes t¿i? étant répartis de telle façon que les termes les plus éloignés se trouvent dans des parties P¿l?, P¿m? distinctes et les termes proches se trouvent dans la même partie P¿l? ; (f) structuration du dictionnaire de concepts et (g) construction d'une base d'empreintes constituée de l'ensemble des concepts c¿i? représentant les termes t¿i? des documents, chaque document étant associé à une empreinte qui lui est propre.

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