Abstract: A method and apparatus are provided for determining a descriptor for a region of interest in an image. The method includes defining a grid of points for the region of interest. A respective zone of influence is associated with each point of the grid of points. A representative value is determined for each point of the grid of points as a function of its respective zone of influence. The representative value obtained for each point of the grid of points is compared with at least one reference value. The result of the comparison serves to define a descriptor for the region of interest.

Abstract: A method is provided for analyzing a piece of multimedia content including a time series of elementary entities, in order to check whether or not the piece of multimedia content includes at least one piece of reference content referenced in a content base. The method includes, for at least one elementary entity of the multimedia content and selected according to a predetermined selection rule, or current elementary entity: allocating a plausibility probability to each elementary entity of a set of current candidate elementary entities; allocating a transition probability between the current candidate elementary entity or entities and at least one previous candidate elementary entity; allocating an identification probability of at least one scenario including a time series of candidate elementary entities; deciding the recognition of one of the reference content and/or carrying on the analysis using a subsequent elementary entity of the piece of multimedia content.

Abstract: A method and apparatus are provided for determining a descriptor for a region of interest in an image. The method includes: defining a grid of points for the region of interest; associating a respective zone of influence with each point of the grid of points; determining a representative value for each point of the grid of points as a function of its respective zone of influence; and comparing the representative value obtained for each point of the grid of points with at least one reference value. The result of the comparison serves to define a descriptor for the region of interest.

Abstract: A method is provided for identifying a multimedia document, aimed at verifying whether the multimedia document to be identified is similar or not to at least one multimedia document referenced in a base of reference multimedia documents. The method includes assignment of a number of votes to at least one reference multimedia document and selection of multimedia documents similar to the multimedia document to be identified. The selection step includes: determining a probabilistic distribution of the number of votes assigned to a reference multimedia document, as a function of the total number of documents referenced in the base and of the total number of votes, under a random voting assumption; and obtaining a threshold of selection of the similar multimedia documents from among the reference multimedia documents, on the basis of the probabilistic distribution.

Abstract: A method is provided for analyzing a piece of multimedia content including a time series of elementary entities, in order to check whether or not the piece of multimedia content includes at least one piece of reference content referenced in a content base. The method includes, for at least one elementary entity of the multimedia content and selected according to a predetermined selection rule, or current elementary entity: allocating a plausibility probability to each elementary entity of a set of current candidate elementary entities; allocating a transition probability between the current candidate elementary entity or entities and at least one previous candidate elementary entity; allocating an identification probability of at least one scenario including a time series of candidate elementary entities; deciding the recognition of one of the reference content and/or carrying on the analysis using a subsequent elementary entity of the piece of multimedia content.