A calculation device, for the selection and the description of points of interest in at least one image decomposed into a plurality of strips, includes a first module for selecting and indexing points of interest from among a set of points of interest detected in the image, the first module being configured to select, in each strip, at most a fixed number P of candidate points of interest, and associate a unique index with them, a second module for managing calculation of descriptors for the candidate points of interest, the first module being configured to transmit the candidate points of interest and their index to the second module immediately at the end of the processing of K lines of a strip, with K an integer number greater than or equal to 1 and strictly less than the number of lines per strip.
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