Two-dimensional code, encoding and decoding method thereof

A coding method and two-dimensional code technology, which are applied in electromagnetic radiation induction, record carriers used by machines, instruments, etc., can solve the problems of large-scale commercial application of two-dimensional codes, camera phones without lighting functions, camera phones reading Insufficient effect and other problems, to achieve the effect of being conducive to wide popularization and application, reliable reading, and low requirements for equipment

Inactive Publication Date: 2006-12-27
SHENZHEN SYSCAN TECHC CO LTD
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Problems solved by technology

Because most camera phones do not have macro imaging function and auto-focus function, even if they have auto-focus function, the entire decoding time will be increased because the focusing process takes a long time. In addition, general camera phones do not have lighting functions and only rely on ambient light to obtain The brightness, contrast, signal-to-noise ratio and other parameters of the image are low. Therefore, for the traditional matrix barcode composed of rectangular modules, the reading effect of the camera phone is not good, which is not conducive to the large-scale commercial application of the two-dimensional code.

Method used

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  • Two-dimensional code, encoding and decoding method thereof
  • Two-dimensional code, encoding and decoding method thereof
  • Two-dimensional code, encoding and decoding method thereof

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Embodiment Construction

[0049] The present invention will be described in further detail below through specific embodiments and in conjunction with the accompanying drawings.

[0050] In this design, circular unit modules are selected, and gaps are reserved between modules. The circular unit module is still a circular unit module after being imaged under the condition of deep defocus, and the shape of the circular unit module can be well restored after unsharp mask filtering. This design makes the image processing algorithm insensitive to the selection of the binarization threshold, because although the threshold will affect the size of the circular unit module after binarization, the center coordinates of the circular unit module will not be affected by the change of the threshold And the drift, because there is a gap between the modules, reduces the possibility of adjacent modules sticking together after binarization, so that each module can be positioned independently.

[0051] Please refer to f...

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Abstract

The invention relates to a two-dimension code and relative decode / code method, wherein said two-dimension code uses round unit module, with space between modules; the round unit module after deep-defocus imaging is returned to round unit module, via unsharp mark filtered, to return back the shape of round unit module. Said design can make the image processing algorism non sensitive to the selection of two-valued threshold value; and since there is space between modules, the adhesive possibility between nearby modules is reduced, to independently position each module. Therefore, the invention can reliably recognize and decode in deep-defocus and low-brightness conditions.

Description

【Technical field】 [0001] The invention relates to a two-dimensional code, an encoding method for encoding data to generate the two-dimensional code, and a decoding method for decoding symbols of the two-dimensional code code image and restoring it to data. 【Background technique】 [0002] A two-dimensional code generally consists of three parts: feature mode area, format information area, and data area. Among them, the feature mode area guides the image recognition algorithm to identify and locate the code map symbols, the format information area stores parameters describing the format of the code map symbols and data error correction, and the data area stores data encoded by the error correction coding algorithm. [0003] The most promising application method of QR code is: use the QR code decoding program on the mobile phone operating platform to capture and analyze the QR code through the phone camera to obtain various value-added services. Because most camera phones do n...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00
CPCG06K7/14G06K19/06037G06K7/1417G06K19/06G06K17/00G06K7/00
Inventor 常治国吕迎丰张伟
Owner SHENZHEN SYSCAN TECHC CO LTD
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