Title:
METHOD FOR AUTOMATICALLY DETERMINING AUTHENTICITY OF INDIVIDUAL ARTICLE USING MICRO CONTOUR SHAPE OF PRINTING AS IDENTIFIER
Document Type and Number:
WIPO Patent Application WO/2015/022872
Kind Code:
A1
Abstract:
[Problem]
There is no method which is for automatically determining the authenticity of an article and which can be executed by an average person using a camera-equipped cell phone.
[Solution]
The color of an ink (for which the difference between an attribute such as the color luminance and that of a background color is equal to or greater than a fixed value) is specified, and a fine unique shape is printed in that color as an identification mark. A computer is used to binarize a digital image of the identification mark automatically using, as a threshold value, a value which is near the central value of the luminance (or the like) corresponding to two peaks appearing in a histogram of the luminance (or the like) of that digital image, and a micro contour shape which is equal to or less than the shape control limit of that identification mark is used as an identifier. The identifier of an identification mark to be compared is compared with the identifier of a stored legitimate identification mark, and the degree of matching therebetween is represented with a unique statistical index calculated automatically by a computer, thereby enabling the authenticity of the identification mark and an individual article to be determined with high precision by an average person using a camera-equipped cell phone.
Inventors:
HIRAYAMA SADAHIRO (JP)
MIWA TATAHIRO (JP)
OGATA HIROAKI (JP)
MIWA TATAHIRO (JP)
OGATA HIROAKI (JP)
Application Number:
PCT/JP2014/070503
Publication Date:
February 19, 2015
Filing Date:
August 04, 2014
Export Citation:
Assignee:
AUTHTEC RES CO LTD (JP)
International Classes:
G06K7/00; B42D25/30; B42D25/305; G07D7/20
Domestic Patent References:
| WO2012023363A1 | 2012-02-23 | |||
| WO2004093433A1 | 2004-10-28 |
Foreign References:
| JPH1063771A | 1998-03-06 | |||
| JP2013134515A | 2013-07-08 | |||
| JP2009516259A | 2009-04-16 |
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