US 11,797,551 B2
Document retrieval apparatus, document retrieval system, document retrieval program, and document retrieval method
Takuya Minami, Tokyo (JP); Yu Kawahara, Tokyo (JP); Shimpei Takemoto, Tokyo (JP); Eriko Takeda, Tokyo (JP); and Yoshishige Okuno, Tokyo (JP)
Assigned to RESONAC CORPORATION, Tokyo (JP)
Appl. No. 17/310,439
Filed by SHOWA DENKO K.K., Tokyo (JP)
PCT Filed Feb. 10, 2020, PCT No. PCT/JP2020/005167
§ 371(c)(1), (2) Date Aug. 3, 2021,
PCT Pub. No. WO2020/166569, PCT Pub. Date Aug. 20, 2020.
Claims priority of application No. 2019-024821 (JP), filed on Feb. 14, 2019.
Prior Publication US 2022/0019581 A1, Jan. 20, 2022
Int. Cl. G06F 16/2458 (2019.01); G06F 16/93 (2019.01); G06V 30/10 (2022.01); G06V 30/32 (2022.01); G06V 30/416 (2022.01)
CPC G06F 16/2468 (2019.01) [G06F 16/93 (2019.01); G06V 30/347 (2022.01); G06V 30/416 (2022.01); G06V 30/10 (2022.01)] 20 Claims
OG exemplary drawing
 
1. A document retrieval apparatus comprising:
a storage device configured to store a program; and
a processor configured to execute the program, and perform a process including
receiving an input of a keyword;
acquiring an author's name and a document file from a digital document database which stores document files of text data obtained by performing a character recognition process with respect to document image data of handwritten documents, and names of authors who wrote the handwritten documents;
referencing an associating keyword database which stores information associating the authors' names, keywords, and associating keywords, to acquire an associating keyword of the input keyword, from the received input keyword and the acquired author's name;
searching the acquired document file, using the input keyword and the acquired associating keyword; and
outputting a search result of the searching.