METHOD FOR DETECTING A CODE WITH THE AID OF A MOBILE STATION

Christer Baeckstroem (Inventor), Caj Soedergaard (Inventor)

Research output: PatentResearch

Abstract

The invention relates to a method for detecting a code (40), and a mobile station adapted to the method. In the method, the mobile station (50) is used to capture an image of the subject (40) and the image is analysed and decoded into a numerical form in the mobile station (50). According to the invention, before the decoding of the bar code in the mobile station the edges of the subject (40) are determined from a high-resolution image, in the case of a 2D code, the location of the corner point of the subject (49) are estimated on the basis of adaptive thresholding, and, in the case of a 2D code, a perspective transformation is formed.

Original languageEnglish
Patent numberWO2005124657
IPCH04M 1/ 2755 A N
Priority date18/06/04
Publication statusPublished - 29 Dec 2005

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Patents and inventions
Bar codes
Image resolution
Decoding

Cite this

Baeckstroem, C., & Soedergaard, C. (2005). IPC No. H04M 1/ 2755 A N. METHOD FOR DETECTING A CODE WITH THE AID OF A MOBILE STATION. (Patent No. WO2005124657).
Baeckstroem, Christer (Inventor) ; Soedergaard, Caj (Inventor). / METHOD FOR DETECTING A CODE WITH THE AID OF A MOBILE STATION. IPC No.: H04M 1/ 2755 A N. Patent No.: WO2005124657.
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abstract = "The invention relates to a method for detecting a code (40), and a mobile station adapted to the method. In the method, the mobile station (50) is used to capture an image of the subject (40) and the image is analysed and decoded into a numerical form in the mobile station (50). According to the invention, before the decoding of the bar code in the mobile station the edges of the subject (40) are determined from a high-resolution image, in the case of a 2D code, the location of the corner point of the subject (49) are estimated on the basis of adaptive thresholding, and, in the case of a 2D code, a perspective transformation is formed.",
author = "Christer Baeckstroem and Caj Soedergaard",
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Baeckstroem, C & Soedergaard, C 2005, METHOD FOR DETECTING A CODE WITH THE AID OF A MOBILE STATION, Patent No. WO2005124657, IPC No. H04M 1/ 2755 A N.

METHOD FOR DETECTING A CODE WITH THE AID OF A MOBILE STATION. / Baeckstroem, Christer (Inventor); Soedergaard, Caj (Inventor).

IPC No.: H04M 1/ 2755 A N. Patent No.: WO2005124657.

Research output: PatentResearch

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T1 - METHOD FOR DETECTING A CODE WITH THE AID OF A MOBILE STATION

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AU - Soedergaard, Caj

PY - 2005/12/29

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N2 - The invention relates to a method for detecting a code (40), and a mobile station adapted to the method. In the method, the mobile station (50) is used to capture an image of the subject (40) and the image is analysed and decoded into a numerical form in the mobile station (50). According to the invention, before the decoding of the bar code in the mobile station the edges of the subject (40) are determined from a high-resolution image, in the case of a 2D code, the location of the corner point of the subject (49) are estimated on the basis of adaptive thresholding, and, in the case of a 2D code, a perspective transformation is formed.

AB - The invention relates to a method for detecting a code (40), and a mobile station adapted to the method. In the method, the mobile station (50) is used to capture an image of the subject (40) and the image is analysed and decoded into a numerical form in the mobile station (50). According to the invention, before the decoding of the bar code in the mobile station the edges of the subject (40) are determined from a high-resolution image, in the case of a 2D code, the location of the corner point of the subject (49) are estimated on the basis of adaptive thresholding, and, in the case of a 2D code, a perspective transformation is formed.

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Baeckstroem C, Soedergaard C, inventors. METHOD FOR DETECTING A CODE WITH THE AID OF A MOBILE STATION. H04M 1/ 2755 A N. 2005 Dec 29.