CN201927040U

CN201927040U - Bar code decoding device

Info

Publication number: CN201927040U
Application number: CN201020213189XU
Authority: CN
Inventors: 俞开斌; 邱有森; 陈文传
Original assignee: Fujian Newland Computer Co Ltd
Current assignee: Fujian Newland Computer Co Ltd
Priority date: 2010-06-01
Filing date: 2010-06-01
Publication date: 2011-08-10
Anticipated expiration: 2020-06-01

Abstract

The utility model provides a bar code decoding device comprising a prediction module and a decoding module connected with the prediction module. Since the bar code decoding device can decode a bar code without prejudging the version and format of the bar code, the problem that the bar code can not be decoded due to the contamination and damage of the version information and format information of the bar code is solved radically.

Description

A kind of bar-code decoder

[technical field]

The utility model relates to a kind of bar-code decoder, relates in particular to a kind of bar-code decoder that can decode to the bar code with a plurality of versions, form.

[background technology]

Barcode technology is an appearance coding, printing, identification, the data acquisition and processing (DAP) emerging technology that grows up on computer technology and infotech basis.Barcode technology is because its identification is quick, accurate, reliable and low cost and other advantages, be widely used in fields such as commerce, taking care of books, storage, post and telecommunications, traffic and Industry Control, and certainly will in " Internet of Things " that rise gradually used, bring into play great function.

Two-dimensional bar code is the bar code of the chequered with black and white figure identifying recording layer symbolic information that (on the two-dimensional directional) distributes on the plane according to certain rules with certain specific geometric figure.Therefore two-dimensional bar code can express a large amount of information in horizontal and vertical two orientation while expressing information in very little area.Two-dimensional bar code also has certain verifying function, good error correcting capability.Two-dimensional bar code can be divided into stack two-dimensional bar code and matrix two-dimensional barcode.The stack two-dimensional bar code is that the bar code by the multirow cutting back piles up and forms, and representational stack two-dimensional bar code comprises PDF417, Code 49, Code 16K etc.Matrix two-dimensional barcode is made up of black, the white module that is distributed in by pre-defined rule in the matrix, and representational matrix two-dimensional barcode comprises Code one, Aztec, Date Matrix, QR sign indicating number etc.

The bar code of same code system may have a plurality of versions or form (comprising error-correction level, mask).With the QR sign indicating number is example, and the QR sign indicating number 0 has 40 versions, version 1 data capacity minimum, edition 40 capacity maximum from version 1 to edition 4.In addition, the QR sign indicating number has four error-correction level, is L, M, Q, H from high to low, and corresponding error correction rate is 7%, 15%, 25%, 30%.Error-correction level is the successful ratio of also decoding under the QR sign indicating number has the situation of certain damage.

Have the general at first detection of bar-code decoder now and obtain function informations such as the version of bar code, form, determine number of modules, mask graph and the error-correction level of bar code then according to above-mentioned information, again bar code is decoded.If it is stained that the version information on the bar code, format information have, then existing coding/decoding method can't be decoded.

[utility model content]

In order to solve in the prior art bar code decoding process is at first needed to judge the version of bar code, the problem that form is decoded again, the utility model provides a kind of bar-code decoder, and this device need not judge that the version of bar code, form can decode to bar code.

For solving the problems of the technologies described above, the utility model provides a kind of bar-code decoder, and this bar-code decoder comprises: estimate module; Decoder module and is estimated module and is connected.

By said method, the version, the form that need not to prejudge bar code can be decoded to bar code, have solved the problem that can't decode to bar code that causes because of bar code version information, format information are stained fully.

[description of drawings]

The utility model is described in further detail below in conjunction with drawings and Examples, in the accompanying drawing:

Fig. 1 is the structural representation of the utility model bar-code decoder one embodiment;

Fig. 2 is the process flow diagram of the utility model bar code decoding method;

Fig. 3 is the particular flow sheet according to a preferred embodiment of the utility model bar code decoding method; And

Fig. 4 is the structural representation of another embodiment of the utility model bar-code decoder.

[embodiment]

The utility model provides a kind of bar-code decoder.This device need not judge that the version of bar code, format information can decode to bar code.

Fig. 1 is the structural representation of the utility model bar-code decoder.As shown in Figure 1, the utility model bar-code decoder 10 comprises and estimates module 11 and decoder module 12.

Estimate module 11 and can store the version and the form of various dissimilar bar codes, and can estimate form, the version of bar code image according to barcode types, wherein form comprises mask graph and error-correction level.For example, by the permutation and combination of may carrying out of each version, mask graph and error-correction level is come version and form are estimated.For example 1～40 version and L, M, four error-correction level of Q, H and the mask graph with the QR sign indicating number carries out permutation and combination.Decoder module 12 is decoded to bar code image according to form, the version estimated.

Fig. 2 is the process flow diagram of the utility model bar code decoding method.As shown in Figure 2, in bar code decoding method of the present utility model, at first obtain bar code image, according to barcode types the version or the form of bar code image are estimated then, and bar code image is decoded according to version of estimating or form.

Fig. 3 is the particular flow sheet according to a preferred embodiment of the utility model bar code decoding method.This method specifically may further comprise the steps:

Step S1: obtain image;

Step S2: the type according to bar code is estimated the version or the form of bar code image;

Step S3: determine sampling grid according to the version of estimating, and carry out pixel sampling;

Step S4: according to the mask graph of estimating the module of code area is carried out XOR and handle, eliminate mask;

Step S5: determine the error correction code word according to the error-correction level of estimating, checking mistake, and carry out error correction;

Step S6: decoding.

Further, bar code decoding method of the present utility model can be judged the type of bar code by the reconnaissance probe figure earlier, estimates according to the barcode types of being judged then.As distortion, type that also can not need judge bar code, but respectively the version or the form of bar code image are estimated according to the pairing barcode types of a plurality of different decode logics, these a plurality of different decode logics carry out parallel decoding according to version or the form estimated separately to bar code image respectively then.

Specifically as shown in Figure 4, in the present embodiment, decoding device 40 comprises a plurality of decoder modules 42,43.Decoder module 42,43 is respectively the decode logic at different barcode types, and for example decoder module 42 is the decode logic of QR sign indicating number, and decoder module 43 is the decode logic of Code one.Estimate that module 41 is carried out version according to decoder module 42,43 pairing barcode types respectively or form is estimated.Decoder module 42 according to estimate that module 41 estimated at the bar code image decoding of a version of QR sign indicating number or form to input, decoder module 43 carries out parallel decoding at a version of Code one sign indicating number or form to the bar code image of input according to what estimate that module 41 estimated simultaneously.After decoder module 42,43 utilizes certain version estimated or form to the bar code image decoding, if can't obtain correct decoded information, then decoder module 42,43 can utilize other versions estimated or form further bar code image to be decoded, one in decoder module 42,43 decodes correct decoded information, and perhaps decoder module 42,43 has used all versions estimated or form to decode.

By said method, can carry out parallel decoding to bar code image in the situation that need not to judge barcode types and version, format information, improved decoding speed.

In the above-described embodiments, only the utility model has been carried out exemplary description, but those skilled in the art can carry out various modifications to the utility model after reading present patent application under the situation that does not break away from spirit and scope of the present utility model.

Claims

1. a bar-code decoder is characterized in that, described bar-code decoder comprises:

Estimate module;

Decoder module is connected with the described module of estimating.