METHOD OF IDENTIFYING AND DETECTING IDENTITY DOCUMENTS Russian patent published in 2025 - IPC G06F18/00 

FIELD: physics.

SUBSTANCE: invention relates to identification and detection of identity documents. In the method, at the first stage, an image of an identity document is supplied to the input; at the second stage, a machine-readable record (MRR) is detected on the image: a) applying computer vision and machine learning methods to search for a potential MRR on an image; b) if the MRR is not detected, the transition to the fifth step takes place; at the third stage, MRR is identified: a) applying optical character recognition to recognize and decode information in the MRR; b) if MRR does not comply with the standard, there is a transition to the fifth stage; c) extracting data on country of publisher and type of document from recognized data; fourth step involves searching for a document using a preselector: a) based on the coordinates of the found MRR, the document search area is set on the image, wherein in order to obtain a document search area, the area of the found MRR is increased as follows: upwards along the vertical the area is expanded by 4 times, if it is the MRR of two lines, and by 1.8 times, if from three lines, downwards by half the height of the MRR, and along the horizontal line, the zone is expanded by 20%; b) using the extracted country and document type information, using a preselector to search only among documents of the corresponding type and country; c) if a match is found, returning the result and terminating the algorithm; at the fifth stage, all types of documents and all countries are searched: a) if MRR is not detected or is not recognized, search is carried out among all available types of documents and all countries; b) if a match is found, returning a result; at the sixth stage, a result of document identification or a message stating that the document was not recognized is obtained.

EFFECT: high accuracy of identifying a document.

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