1. An adapter of an image defined by numerical values associated with points distributed as a matrix, which adapter is intended for transforming an input image into an output image by successively processing rectangular tiles of like dimensions, the image adapter comprising: a plurality of first queue memories connected in series and each having a depth equal to a number of points of a tile row, and connected so as to receive values associated with the points of the input image belonging to a tile currently being processed, the values being transmitted in accordance with the successive rows of the tile; a module for calculating a weighted average having inputs connected respectively to an output of one of the first memories, and devised so as to produce, on an output of the module, sequences of values sampled in a direction parallel to tile columns and corresponding to the values associated with successive points of the input image, each sequence comprising a number of values that is equal to the number of points of the tile row; a sampling rate converter connected to the output of the module, and devised so as to produce values associated with the points of the output image, according to a sampling rate determined for a direction parallel to the tile rows; and a plurality of second queue memories each having a depth equal to the number of points of a tile column, and connected at its input so as to receive, successively for each tile row, values associated with the points of the input image belonging to columns of the tile respectively assigned to each second memory; each second memory being linked at its output to the inputs of the average calculating module and controlled in such a way as to transmit to each input of the module values associated with the points of the input image belonging to a tile processed earlier and situated alongside the tile currently being processed in the direction parallel to the rows, with a continuous progression between the current and earlier tiles for each row of input image common to the current and earlier tiles.