Bar space margin processing module, bar code identifying device and method thereof

Abstract

The invention provides a bar space margin processing module and a bar code identifying device using the bar space margin processing module. The bar space margin processing module comprises a scanning margin acquisition unit, a linear scanning unit and a sub-pixel margin calculation unit. The scanning margin acquisition unit is used for acquiring a bar space margin point and a bar code direction and calculating the scanning margin; the linear scanning unit selects a scanning starting point and a scanning destination corresponding to the scanning starting point according to the scanning margin, and calculates the coordinates of the pixel point on the straight line between the scanning starting point and the scanning destination; and the sub-pixel boundary calculation unit is used for calculating the coordinates of the bar space margin according to the coordinates of the pixel point and the grey value of the pixel point. The invention further provides a bar space margin processing method and a bar code identifying method. The bar space margin processing module and the bar code identifying device of the invention can adjust the decoding direction according to the bar code direction, acquire the precise coordinate values of the bar code margin and improve the decoding success rate.

Description

【Technical field】 [0001] The invention relates to the technical field of barcode identification, in particular, to a bar-space boundary processing module and a processing method thereof, and a barcode recognition device using the bar-space boundary processing module and a recognition method thereof. 【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 ...

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Problems solved by technology

[0007] Aiming at the defect that the decoding device in the prior art relies on the user to correctly sense the direction of the barcode through the scanning unit and cannot adjust the decoding direction according to the direction of the barcode, the present invention provides a bar-space boundary processing module and its processing method and the application of the barcode The barcode recognition device and its recognition method of the empty boundary processing module can correctly identify the barcode information and improve the success rate of decoding

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