Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Aleksandr Valiukov0
Ivan Zagaynov0
Stanislav Semenov0
Vasily Loginov0
Date of Patent
February 6, 2024
0Patent Application Number
173849850
Date Filed
July 26, 2021
0Patent Citations
Patent Primary Examiner
Patent abstract
A method of generating and optimizing a codebooks for document analysis comprises: receiving a first set of document images; extracting a plurality of keypoint regions from each document image of the first set of document images; calculating local descriptors for each keypoint region of the extracted keypoint regions; clustering the local descriptors such that each center of a cluster of local descriptors corresponds to a respective visual word; generating a codebook containing a set of visual words; and optimizing the codebook by maximizing mutual information (MI) between a target field of a second set of document images and at least one visual word of the set of visual words.
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