Method for detecting a code with the aid of a mobile station

Christer Bäckström (Inventor), Caj Södergård (Inventor)

    Research output: PatentPatent application


    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.

    Patent family as of 5.5.2022
    CN101014963 A 20070808 CN200580027545 20050617
    EP1756746 A1 20070228 EP20050756353 20050617
    FI20040858 A 20051219 FI20040000858 20040618
    FI20040858 A0 20040618 FI20040000858 20040618
    US2007183652 AA 20070809 US20050629820 20050617
    WO05124657 A1 20051229 WO2005FI00291 20050617
    Original languageEnglish
    Patent numberWO05124657 A1
    IPCH04M 1/ 2755 A N
    Priority date18/06/04
    Filing date17/06/05
    Publication statusPublished - 29 Dec 2005
    MoE publication typeNot Eligible


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