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Two-dimensional point code as well as decoding device and decoding method thereof

A technology of two-dimensional point code and decoding method, which is applied in the field of image digital coding, and can solve problems such as large errors, complicated calculations, and easy misjudgment

Inactive Publication Date: 2012-07-04
ELAN MICROELECTRONICS CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the calculation of rotation requires the use of sine and cosine operations, and the farther away from the center of rotation, the greater the error, the calculation is complicated and easy to misjudge

Method used

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  • Two-dimensional point code as well as decoding device and decoding method thereof
  • Two-dimensional point code as well as decoding device and decoding method thereof
  • Two-dimensional point code as well as decoding device and decoding method thereof

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Embodiment Construction

[0035] figure 1 It is a schematic diagram of positioning points and direction points according to an embodiment of the present invention. Five positioning points 102 form a vertical cross 10, and direction points 12 assist in judging the direction of the two-dimensional point code. In this embodiment, direction points 12 are defined as In the upper right corner of the cross, in other embodiments, the direction point 12 can be defined at other positions, such as the position of each point 14, as long as it has a fixed relative relationship with the cross 10 formed by the positioning point 102, read When taking the two-dimensional point code, it is sufficient to obtain the direction information of the current two-dimensional point code. After knowing the direction of the two-dimensional point code, according to the positional relationship between the positioning points 102, multiple virtual grid points are calculated in all directions. figure 2 It is a schematic diagram of the...

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PUM

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Abstract

The invention provides a two-dimensional point code as well as a decoding device and a decoding method thereof. The two-dimensional point code comprises a plurality of positioning points, a direction point and a data point. Coordinates of a plurality of virtual data points are defined according to the positioning points and the direction point during decoding, and then the data points are compared with the coordinates of the virtual data points, thereby rapidly obtaining the positions of the data points without any rotating correction and reproducing the information represented by the two-dimensional point code.

Description

technical field [0001] The present invention relates to a graphical digital code, in particular to a two dimensional bar code. Background technique [0002] The two-dimensional dot code is a pattern prepared according to specific rules to imply a specific information, and has been widely used in various commodities, such as children's American English teaching materials. These teaching materials are printed with clear and obvious main characters, and the two-dimensional dot codes that are very small and inconspicuous compared to the main characters are printed behind the main characters, just like the background of the main characters. When the user reads the main character, at the same time, the two-dimensional dot code in the background is scanned into the computer or other device by the optical reading device, and the device decodes the two-dimensional dot code and outputs its corresponding information to strengthen the The user's impression of the subject word. For exa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F3/03G06K7/10G06K19/06
Inventor 敖振华陶逸欣张正儒
Owner ELAN MICROELECTRONICS CORPORATION