发明名称 |
Information encoding methods, and sets of graphical codes |
摘要 |
A method of defining a set of graphical codes comprises the steps of: defining a size and shape of a two-dimensional barcode and of each element making up the bar code; defining a set comprising all possible graphical codes conforming to the definition of the size and shape of the bar code; identifying some of the bar codes as invalid codes, according to a number of predefined rules; and identifying other of the bar codes as valid codes. The predetermined rules comprise at least one of the following rules. A valid bar code may not have a row or column which consists of elements of a same value. A valid code has a predetermined number (or numbers) of elements of a particular type. A valid bar code may not be rotationally symmetrical with any other valid bar code. Each valid bar code must differ from each other valid bar code in at least a predetermined number of elements. The graphical codes may be used to retrieve further information relating to information or advertisements presented in a visible message. |
申请公布号 |
GB2424109(B) |
申请公布日期 |
2008.02.27 |
申请号 |
GB20050004759 |
申请日期 |
2005.03.08 |
申请人 |
ROKE MANOR RESEARCH LIMITED |
发明人 |
EDMUND PETER SPARKS;CHRISTOPHER GEORGE HARRIS |
分类号 |
G06K19/06;G06K7/14 |
主分类号 |
G06K19/06 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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