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2-dimensional code region extraction method, 2-dimensional code region extraction device, electronic device, 2-dimensional code region extraction program, and recording medium containing the program

A two-dimensional code and area extraction technology, applied in the field of two-dimensional code area extraction, can solve problems such as high complexity levels, and achieve the effect of accurate reading

Inactive Publication Date: 2007-04-18
SHARP KK
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Problems solved by technology

In general, blocks with a higher probability of presence of 2D codes have a higher complexity level

Method used

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  • 2-dimensional code region extraction method, 2-dimensional code region extraction device, electronic device, 2-dimensional code region extraction program, and recording medium containing the program
  • 2-dimensional code region extraction method, 2-dimensional code region extraction device, electronic device, 2-dimensional code region extraction program, and recording medium containing the program
  • 2-dimensional code region extraction method, 2-dimensional code region extraction device, electronic device, 2-dimensional code region extraction program, and recording medium containing the program

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Embodiment Construction

[0053] Hereinafter, embodiments of a two-dimensional code region extraction method, a two-dimensional code region extraction device, and an electronic device according to the present invention will be described in detail with reference to the accompanying drawings.

[0054] FIG. 1 shows the relationship between image data and scan lines in the two-dimensional code area extraction device and method according to the embodiment of the present invention.

[0055] In particular, FIG. 1 shows steps performed by a two-dimensional code area extraction device or method for extracting a two-dimensional code area on image data and a positional relationship between image data. An embodiment of the present invention will be described below with reference to FIG. 1 showing image data including vertical H pixels×horizontal W pixels. The two-dimensional code existing on the image data is a QR code.

[0056] Fig. 2 shows a block diagram of the structure of a two-dimensional code region extrac...

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Abstract

A 2-dimensional code region extraction device (1) includes a scan unit (11) for longitudinally / laterally scanning image data containing a 2-dimensional code, a blank space detection unit (12) for judging white / black gradation of the pixel scanned and detecting a blank space, a non-blank space information calculation unit (13) for calculating a distance to the non-blank space existing between the detected blank spaces and its center coordinate, a comparison unit (14) for comparing the length of the non-blank space existing in the longitudinal and lateral direction with its center coordinate so as to judge whether a 2-dimensional code exists, and an order decision unit (15) for comparing a plurality of 2-dimensional code candidate regions detected and ranking the 2-dimensional candidate regions.

Description

technical field [0001] The present invention relates to a two-dimensional code area extraction method for extracting areas with two-dimensional codes, a two-dimensional code area extraction device, an electronic device, a two-dimensional code area extraction program, and a method for recording the above-mentioned program recording medium. Background technique [0002] The recent development of small-sized and low-power image sensors has made it possible to build cameras inside portable devices such as mobile phones. As a result, images stored in the built-in camera can be sent instantly by e-mail. In such built-in cameras, however, priority must be small size and low resolution compared with conventional digital cameras. [0003] Today's mobile phones are also equipped with Internet access. In order to connect to the Internet, a URL (Uniform Resource Locator) must be entered with a key. Loading long URLs into mobile phones takes time. Attempts have now been made to omit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K7/10G06K7/14
CPCG06K7/1443G06K7/14
Inventor 田崎大
Owner SHARP KK
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