METHOD OF ASSESSING THE VALIDITY OF A DOCUMENT USING OPTICAL RECOGNITION OF TEXT ON THE IMAGE OF A ROUND IMPRESSION OF A PRINT / STAMP ON A DIGITAL IMAGE OF A DOCUMENT Russian patent published in 2021 - IPC G06T1/20 G06K9/46 

FIELD: data processing.

SUBSTANCE: invention relates to optical recognition of text. Text area in the image is geometrically normalized: round printing strip "turns" on image B in rectangle, image C is obtained, where division code search is carried out by template XXX-XXX using a Viola-Jones algorithm, obtaining the coordinates of the rectangle of the subdivision code, performing its cutting, obtaining images D, if the division code area is not found, connecting the ends of the image C and cutting, obtaining an image H, performing a repeated search of the subdivision code region, obtaining coordinates of the division code rectangle, performing its cutting, receiving images F, recognizing the subdivision code is carried out using optical character recognition, result is a text string with alternatives and recognition estimates, during postprocessing of the obtained result for the recognized string, a syntax diagram is pre-set according to its template, then searching for the optimal path on the AR-chain, the result is the text value Τ collected from the text values assigned to the vertices of the optimal path.

EFFECT: faster operation, quality and reliability of optical recognition of the print / die imprint.

1 cl, 5 dwg