Title:
INFORMATION CODE AND CODE RETRIEVAL METHOD
Document Type and Number:
WIPO Patent Application WO/2023/233991
Kind Code:
A1
Abstract:
This information code (CQ2) is synthesized from a public code (Cd1) and a confidential code (Cd2) which record information by using a two-dimensional array of a plurality of cells (Ce), and in addition to a white cell (Cew) and a black cell (Ceb), also contains a light color cell (Cc1) and a dark color cell (Cc2). The light color cell (Cc1) is determined to be the same as the white cell (Cew) when retrieving the public code (Cd1), and is determined to be a black cell (Ceb) when retrieving the confidential code (Cd2). The dark color cell (Cc2) is determined to be the same as the black cell (Ceb) when retrieving the public code (Cd1), and is determined to be a white cell (Cew) when retrieving the confidential code (Cd2). The confidential code (Cd2) is enlarged relative to the public code (Cd1), and one cell (Ce) of the confidential code (Cd2) is synthesized across a plurality of cells (Ce) of the public code (Cd1).
Inventors:
KIKUCHI SHINICHI (JP)
OKABE TATSUYA (JP)
OKUMURA MITSUO (JP)
OKABE TATSUYA (JP)
OKUMURA MITSUO (JP)
Application Number:
PCT/JP2023/018101
Publication Date:
December 07, 2023
Filing Date:
May 15, 2023
Export Citation:
Assignee:
DENSO CORP (JP)
International Classes:
G06K19/06; G06K7/14
Domestic Patent References:
| WO2021251317A1 | 2021-12-16 |
Foreign References:
| JP2010008451A | 2010-01-14 |
Attorney, Agent or Firm:
YAHAGI Kazuyuki et al. (JP)
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