Sign character extracting module and method

A symbol character, bar space technology, applied in the field of barcode recognition, can solve the problems of misreading, reduce decoding success rate, interference, etc., to achieve the effect of accelerating decoding speed, decoding speed and shortening decoding time.

Inactive Publication Date: 2010-11-10
NEWLAND DIGITAL TECH CO LTD
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Problems solved by technology

[0006] Aiming at the problem that the barcode image in the prior art has interference boundaries, which can easily cause misreading and reduce the success rate of decoding, the present invention provides a symbol character extraction module and its extraction method, which can correctly identify the bar and space information of the barcode and improve the decoding success rate. Rate

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  • Sign character extracting module and method

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Embodiment Construction

[0016] Regarding the features and technical content of the present invention, please refer to the following detailed description and accompanying drawings, which are provided for reference and illustration only, and are not intended to limit the present invention.

[0017] In order to make it easier for those skilled in the art to understand the present invention, the following firstly analyzes the principle of the boundary gray level difference of the barcode bar space, Figure 2A is a schematic diagram of the ideal step boundary of the bar space. Figure 2B is a schematic diagram of the point spread function corresponding to the ideal step boundary of the bar. Such as Figure 2A As shown, the ideal boundary of the bar space of the barcode symbol can be represented by the ideal step boundary of the gray value from 0-255. However, after being imaged by the optical system, the ideal boundary of the stripe space will expand. Such as Figure 2B As shown, the point spread func...

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Abstract

The invention provides a sign character extracting module applied to a barcode identifying device, comprising a bar and blank boundary storer, a boundary counter, a width calculating unit and a control logic unit, wherein the bar and blank boundary storer is used for storing the bar and blank boundaries of bar codes; the boundary counter is used for counting the quantity of the bar and blank boundaries stored by the bar and blank boundary storer; the width calculating unit is used for calculating the total width of the bar and blank boundaries stored by the bar and blank boundary storer to obtain the combined width value of the stored bar and blank boundaries; and the control logic unit is used for acquiring the bar and blank boundary number and the bar and blank width of the sign characters of the bar codes and then judging according to the quantity of the bar and blank boundaries and the combined width value of the stored bar and blank boundaries as well as the bar and blank boundary number and the bar and blank width of the sign characters of the bar codes to remove interference boundaries in the bar and blank boundaries. The invention also provides a sign character extracting method. The sign character extracting module and method can accomplish the work of removing the interference boundaries when acquiring the bar and blank boundaries, thereby quickening the decoding speed of the bar codes and shortening the decoding time.

Description

【Technical field】 [0001] The invention relates to the technical field of barcode identification, in particular to a symbol character extraction module and an extraction method thereof applied in a barcode identification device. 【Background technique】 [0002] Bar code technology is an emerging technology developed on the basis of computer technology and information technology that integrates coding, printing, identification, data collection and processing. Barcode technology is widely used in business, library management, warehousing, post and telecommunications, transportation and industrial control due to its advantages of fast, accurate, reliable and low cost, and is bound to play an important role in the emerging "Internet of Things" applications. role. [0003] Currently widely used barcodes include one-dimensional barcodes and two-dimensional barcodes. A one-dimensional barcode, also known as a linear barcode, is composed of multiple "bar" and "space" units arranged ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K7/10
Inventor 王贤福胡伦育丁彦郡刘琼
Owner NEWLAND DIGITAL TECH CO LTD
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