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Cristin-resultat-ID:
1271449
Sist endret:
24. september 2015, 19:52
Resultat
Vitenskapelig foredrag
2006
System for Reading Braille Embossed on Beverage Can Lids for Authentication
Trine Kirkhus
Presentasjon
Presentasjon
Navn på arrangementet: 8th International Conference, ACIVS 2006
Sted: Antwerp, Belgium
Dato fra:
18. september 2006
Dato til:
21. september 2006
Om resultatet
Om resultatet
Vitenskapelig foredrag
Publiseringsår: 2006
Importkilder
Importkilder
SINTEF AS-ID: S1173
Beskrivelse
Beskrivelse
Engelsk
Tittel
System for Reading Braille Embossed on Beverage Can Lids for Authentication
Sammendrag
The paper describes a system I for reading embossed Braille patterns on used aluminum beverage container lids. The intent of the system is to check whether the used containers are entitled to a refund. The lids have strong specular reflections. The reflections are avoided by a novel method that illuminates the lid alternating from two angles, and acquires two separate images. This illumination method is more compact than existing methods. We use the extended maxima algorithm to detect the Braille dots, and a cluster-based pattern point matching algorithm to recognize a pre-defined Braille pattern. The algorithms are customized to increase speed using a priori information. The system was evaluated on a test set containing 225 images. The median time used for analyzing one beverage can was I second, and the recognition rate was 94 percent.
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Bidragsytere
Trine Kirkhus
Forfatter
ved Smart Sensors and Microsystems ved SINTEF AS
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