US 11,989,979 B2
Method for generating information about the production of a handwritten, handaffixed or printed trace
Nesma Houmani, Melun (FR); and Sonia Garcia-Salicetti, Paris (FR)
Assigned to INSTITUT MINES TELECOM, Palaiseau (FR)
Appl. No. 17/422,198
Filed by INSTITUT MINES TELECOM, Palaiseau (FR)
PCT Filed Jan. 11, 2019, PCT No. PCT/IB2019/050224
§ 371(c)(1), (2) Date Jul. 11, 2021,
PCT Pub. No. WO2020/144494, PCT Pub. Date Jul. 16, 2020.
Prior Publication US 2022/0075987 A1, Mar. 10, 2022
Int. Cl. G06K 9/00 (2022.01); G06V 30/226 (2022.01); G06V 30/228 (2022.01); G06V 40/30 (2022.01)
CPC G06V 40/33 (2022.01) [G06V 30/226 (2022.01); G06V 30/228 (2022.01)] 20 Claims
OG exemplary drawing
 
1. A method for generating at least one information about the production of a handwritten, hand-affixed or printed trace on a surface, comprising:
extracting several features describing the trace from at least one three-dimensional image of said trace, acquired by an imagery system, and
inputting said extracted features in a trained module to output said at least one information, said module having been trained beforehand with a plurality of previously-acquired three-dimensional images of traces and corresponding information related to the production of these traces;
wherein said information about the production of the trace is:
the authenticity of the trace;
whether the trace is handwritten or not;
if the trace was made by one or more writers, and possibly the number of writers;
the identity of the writer(s) and its verification, in the case where a list of possible identities is provided by a forensic expert, with an associated confidence score;
the possibility that two or more traces were produced in the same way, for example by the same person, information used in the re-identification of people, or by the same ink;
the detection of signature imitations or disguised signatures, or of autographs with ‘forged’ signatures;
the type of forgery;
the age category of the writer(s) having produced the trace, if the latter is handwritten;
the laterality of the producer of the trace, and its inference;
the detection of erasures not visible to human eyes;
the identification of fingerprints on a document;
the object or material used for the production of the trace, such as laser printer or ballpoint pen;
the identification of the printing process used to prepare documents, such as typewriter, printed with ink jet, laser printers, and photocopiers;
the identification of writing that has been added with a different ink;
the nature of the surface, especially rigid or flexible;
the production of evidence of the continuity or non-continuity of entries made in a document, such as a journal or a patient medical record; or
the psychological state of the writer, useful for example in some applications where the profiling of a person's mental health is required.