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1. (WO2018158648) DISPLAY CODE GENERATION METHOD, DISPLAY CODE DETECTION METHOD, AUTHENTICATION SYSTEM, AND COMMUNICATION SYSTEM

Pub. No.:    WO/2018/158648    International Application No.:    PCT/IB2018/050989
Publication Date: Sat Sep 08 01:59:59 CEST 2018 International Filing Date: Tue Feb 20 00:59:59 CET 2018
IPC: G06K 19/06
G06K 7/10
G06K 7/14
H04B 10/116
G06F 21/31
Applicants: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
株式会社半導体エネルギー研究所
Inventors: SAITO, Seiichiro
斉藤成一郎
FUKUTOME, Takahiro
福留貴浩
Title: DISPLAY CODE GENERATION METHOD, DISPLAY CODE DETECTION METHOD, AUTHENTICATION SYSTEM, AND COMMUNICATION SYSTEM
Abstract:
A new display code is provided. This display code generation method generates a display code from digital data, which are encoded into grayscale values. A plurality of display frames indicate digital data that have been encoded into grayscale values. It should be noted that a first display code indicates, as two-dimensional cells, digital data that have been encoded into a plurality of grayscale values, and a second display code is generated from a plurality of first display codes.