micropdf417 barcode decoding chip

Abstract

The invention provides an MicroPDF417 bar code decoding chip comprising a scanning module, a boundary identification module, a direction identification module, a bar-space boundary processing module, a symbolic parameter identification module, a symbolic character acquisition module and a decoding module, wherein the scanning module generates scanning coordinates; the boundary identification module reads a bar code image according to the scanning coordinates and calculates pixel points of the read bar code image to acquire bar-space boundary points of the bar code image; the direction identification module obtains a bar code direction through calculation according to the bar-space boundary points acquired by the boundary identification module; the bar-space boundary processing module processes the bar code image to acquire bar-space boundaries of the bar code image according to the bar code direction; the symbolic parameter identification module identifies the symbolic parameters of a bar code to acquire the symbolic parameters according to the bar-space boundaries; the symbolic character acquisition module obtains symbolic characters through calculation according to the bar-space boundaries and the symbolic parameters; and the decoding module converts the symbolic characters into bar code information. The MicroPDF417 bar code decoding chip adopts a hardware pipeline structure, is suitable for carrying out pipeline operation and parallel processing on the bar code image and has fast processing.

Description

【Technical field】 [0001] The invention relates to the technical field of barcode identification, in particular to a MicroPDF417 barcode decoding chip. 【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 in parallel, and the barcode information is expressed by the different widths...

AI Technical Summary

Problems solved by technology

[0007] Aiming at the deficiency 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 MicroPDF417 barcode decoding chip, which can correctly identify the blank information of the barcode , to improve the success rate of decoding

Images