1. Method for identifying at least one sign on at least one image of a document that can be deformed, said method being implemented by a data processing device able to be connected to a first storage device and characterised in that it comprises steps of: acquiring (E 1 ) said at least one digital image of said document; determining (E 2 ) in the acquired image at least one sub-part of the image acquired, referred to as candidate sign region, using an image segmentation algorithm, for each candidate sign region, calculating (E 3 ) a signature comprising a piece of information concerning the location in the acquired image of said candidate sign region and a region descriptor concerning the local characteristics of the image in said region, identifying (E 4 ) at least one sign on said at least one image of said document using the calculated signatures, said step of identifying comprising jointly a comparison (E 41 ) of the calculated signatures with reference signatures concerning sign regions of document models stored in the first storage device, said comparison being carried out according to a geometric deformation model of said document, and an estimation (E 42 ) according to said comparison of said geometric deformation model.