Detection method of two-dimensional code, detection device...

Details Detection method of two-dimensional code, detection device... Detection method of two-dimensional code, detection device...

2006-09-20

2011-11-22

Le, Thien M. (Department: 2887)

Registers

Coded record sensors

Particular sensor structure

C235S462090, C235S462100, C235S462110, C235S494000

Reexamination Certificate

active

08061615

ABSTRACT:
A method for detecting a two-dimensional code in which three position detection patterns are provided in positions corresponding to respective apices of a right angled isosceles triangle, and a data region is provided in a region defined by the position detection patterns is provided. The method includes detecting plural position detection patterns included in an image; identifying center points of the detected position detection patterns; selecting, from among the center points that positions are identified, three center points that constitute apices of a right angled isosceles triangle; extracting a feature as a two-dimensional code from a two-dimensional code region defined by the position detection patterns corresponding to the selected center points, or the peripheral region thereof; and in case where the feature as a two-dimensional code is extracted, determining that a two-dimensional code exists in the two-dimensional code region.

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