A method of processing an encoded digital signal comprising a set of data obtained by encoding a set of original data representing physical quantities, and a set of information representing the original data and parameters used during the encoding. The method includes receiving an initial request for obtaining a selected part of the digital signal,determining at least one quantity of data representing the selected part of the digital signal as a function of the set of information and of the initial request, and providing at least one value of this determined quantity of data.

 
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> Image-effect method and apparatus using critical points

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