Method in creating a symbol pattern, symbol pattern obtained thereby, method and system for finding a position in such symbol pattern and computer program product for performing the method

Method in creating a symbol pattern, symbol pattern obtained thereby, method and system for finding a position in such symbol pattern and computer program product for performing the method

  • CN 1,981,259 B
  • Filed: 07/05/2005
  • Issued: 07/04/2012
  • Est. Priority Date: 07/08/2004
  • Status: Active Grant
First Claim
Patent Images

1. one kind is used for being printed on the paper or being displayed on the two-dimensional symensional symbol pattern P on the computer screen when checkout equipment (400) wA part on find the position of this checkout equipment (400) when moving (wherein, this checkout equipment (400) comprise and is used for obtaining in said position (X, the symbol pattern P that Y) locates for X, method Y) wThe image capture device (403) of image, this symbol pattern P wHave following attribute, that is, having definition shape and size is that any mask B of m value of symbol is unique at least, and this symbol pattern is based on value of symbol S kNon repetitive sequence S form each value of symbol S kCorresponding to x kThe fixed linear combination of the coefficient C of the monomial in (mod P (x)), wherein, P (x) is territory F qIn any polynomial of degree n, and through forming this symbol pattern P according to the folding said sequence S of backrush scheme W wWherein, realize said method by signal processing apparatus (411) in the checkout equipment (400) or the external unit of communicating by letter with checkout equipment (400), said method comprises:

  • Retrieval is about the information of the relation between the coefficient C of value of symbol among the mask B and correspondence;

    (X, the value of symbol of the said mask B of extraction in the said image of Y) locating to obtain from said position;

    Through said relation from B X, YCalculate corresponding coefficient C X, Y, wherein, B X, YFor B in said position (X, the value of symbol of the extraction of Y) locating;

    Coefficient C equals C among the sequence of calculation S X, YPosition k;

    With Position-based k and backrush scheme W calculate said checkout equipment (400) at symbol pattern P wOn said position (X, Y).

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