TW200943234A - Coin authenticity judging method and device thereof - Google Patents

Coin authenticity judging method and device thereof

Info

Publication number
TW200943234A
TW200943234A TW97112909A TW97112909A TW200943234A TW 200943234 A TW200943234 A TW 200943234A TW 97112909 A TW97112909 A TW 97112909A TW 97112909 A TW97112909 A TW 97112909A TW 200943234 A TW200943234 A TW 200943234A
Authority
TW
Taiwan
Prior art keywords
incuse
medal
relief portion
image
image processing
Prior art date
Application number
TW97112909A
Other languages
Chinese (zh)
Inventor
Kunihiro Sugita
Original Assignee
Nihon Unica Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nihon Unica Corp filed Critical Nihon Unica Corp
Priority to TW97112909A priority Critical patent/TW200943234A/en
Publication of TW200943234A publication Critical patent/TW200943234A/en

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  • Testing Of Coins (AREA)

Abstract

With a coin authenticity judging method and a device thereof according to an embodiment of the present invention, image data of an incuse/relief portion 14 formed on a surface of a medal 13 are acquired by capturing an image of the incuse/relief portion 14 by means of an image sensor 23 disposed so as to oppose the medal 13 substantially straightly, while illuminating light from a light source disposed obliquely above the medal 13, and an image processing of using two or more predetermined threshold values to multinarize brightness information, including shading related to the incuse/relief portion 14, in the acquired image data into three or more values is performed. By the image processing of multinarization into the three or more values, the medal 13 surface is regionally divided in to at least a profile region 14-1, a top surface region 14-2a, and a bottom surface region 14-2b in the incuse/relief portion 14. The authenticity of the medal 13 is then judged based on shape data of the incuse/relief portion 14 obtained by the image processing and master data, including a shape of an incuse/relief portion 14 formed on a surface of an authentic medal 13.
TW97112909A 2008-04-09 2008-04-09 Coin authenticity judging method and device thereof TW200943234A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
TW97112909A TW200943234A (en) 2008-04-09 2008-04-09 Coin authenticity judging method and device thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
TW97112909A TW200943234A (en) 2008-04-09 2008-04-09 Coin authenticity judging method and device thereof

Publications (1)

Publication Number Publication Date
TW200943234A true TW200943234A (en) 2009-10-16

Family

ID=44868973

Family Applications (1)

Application Number Title Priority Date Filing Date
TW97112909A TW200943234A (en) 2008-04-09 2008-04-09 Coin authenticity judging method and device thereof

Country Status (1)

Country Link
TW (1) TW200943234A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI559261B (en) * 2014-12-08 2016-11-21 Identify methods of forging coins

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI559261B (en) * 2014-12-08 2016-11-21 Identify methods of forging coins

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