CN103414695A - Compressing and encrypting method for QR codes - Google Patents

Abstract

The invention provides a compressing and encrypting method for QR codes. The method comprises the steps that original QR codes are read to be binary information; bit shifting is conducted on the original information, and data are encapsulated; the space which exists after bit shifting is conducted on the original information is filled with identifiers with indicated compressed formats; the original information is sequentially stored into the space which exists after bit shifting is conducted on the next bit; the spaces of the extended last eight bits with the original information stored are supplemented to be zero, and the spaces of the last eight bits after next extension are filled with stop characters; the data operated in the above steps generate the QR code again. By means of the technical scheme, information stored in the QR code can be fast and conveniently compressed, and the corresponding encryption effect is achieved objectively.

Description

The compression of QR code and encryption method

Technical field

The invention belongs to the Graphic Information in Computer field, especially relate to a kind of compression and encryption method of QR code.

Background technology

As everyone knows, the bar code of one dimension is through the development of more than ten years, its application is from the merchandise control that supermarket, convenience store are representative, the effective input information means of every profession and trade have been become, yet along with informationalized development rapidly, some new demands display: take in more information, be printed in less space.

High speed development along with network, outwardly, information exchange between enterprise and shared-required network infrastructure of electronic data interchange are set up, but in fact due to Internet protocol and security problems, also can't carry out exchanges data with the Internet in a short time, therefore need to use Quick Response Code to carry out the action of electronic data interchange on paper.

Quick Response Code is developed in order to adapt to such demand just, and the QR code has the characteristics such as high density, large capacity, error correcting capability are strong, has widened application.The application of Quick Response Code is more and more extensive now, its application and cell phone network are except being used for scanned business card, manage outside individual talk-back ability, can also bring shopping at network, realize automatic online, the processing of the data in the time of can also realizing settling accounts of mobile phone, or be to replace admission ticket etc. with the QR code.

The extensive use of two-dimensional bar code will bring new demand and the new problem of Bar Code.Such as needs in the IMAQ distortion, the two-dimensional bar code of can also well identifying and decode in the situation such as image background is more complicated, and anamorphose is serious.This numerous scientific research personnel to the study two-dimensional barcode technology be challenge be also power.

Bar codes technique is the integrated technology that integrates the technology such as bar code theory, photoelectric technology, computer technology, the communication technology, originates from the forties in 20th century.It has the characteristics such as high input speed, reliability is high, the Information Monitoring amount is large, cost is low, and development in recent years is very rapid, is widely used in the world the every field such as commodity circulation, logistic storage, information service, has greatly improved production efficiency.

In recent years, another field that extensively obtains popularizing was exactly mobile phone.Since the beginning of the nineties, wireless mobile technology and market application obtain develop rapidly and success.From beep-pager appearing on the market of 3G mobile up till now, Chinese have been accustomed to the cell phone in the hand and have ceaselessly changed.The focus of Mobile Communication Development, by the growth of number of users, transfers the growth of traffic carrying capacity and new business to; By technology, drive and transfer business-driven to.In fierce market competition, more and more ripe cellphone subscriber not only focuses on the outward appearance of mobile phone hardware, more focuses on the power that mobile phone is given.A new demand has been expedited the emergence of in above two universal fields: be about to Quick Response Code and mobile phone and combine, utilize mobile phone as fetch equipment, realize bar-code identification.With Quick Response Code, carried out in the last few years the existing corresponding research of mode of information exchange between mobile phone, the method that employing Quick Response Code as disclosed as Chinese patent 201210484060.6 carries out multi-platform mass data transmission.But conventional two-dimensional code institute energy canned data amount is limited, becomes the bottleneck that QR code transmission information is adopted in restriction.

Summary of the invention

The problem to be solved in the present invention is to provide a kind of compression and encryption method of QR code, is particularly suitable for adopting the QR code to carry out the scene of mass data transmission.

For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of compression of QR code and encryption method, and described method comprises:

1) original QR code is read as to binary information;

2) original information is carried out to displacement operation (bitshifting) encapsulation of data;

The indications that 3) will show compressed format is inserted the space after original information carries out displacement operation (bit shifting) operation;

4) original information is deposited in successively original information shared everybody carry out the space after displacement operation (bit shifting) operation

5) original information being stored into to last 8 bit spaces after expansion mend is 0.

6) last 8 bit spaces after next expansion are filled full stop;

7) data after aforesaid operations are regenerated to the QR code.

Owing to adopting technique scheme, can to Quick Response Code institute canned data, compress fast and easily, objectively also played corresponding encryption effect.Also facilitate the much information compression is merged in same QR code simultaneously, make the QR code can store more information.

The accompanying drawing explanation

Fig. 1 is the QR code schematic diagram in an example of the present invention

Fig. 2 is the QR code schematic diagram in another example of the present invention

Fig. 3 is the QR code schematic diagram that in the present invention, the first two QR code code Information Compression generates after merging

Embodiment

As shown in Figure 1, the corresponding information that can read out of the Quick Response Code in Fig. 1 is

" http://www.iitdev.com ", in for its generative process, according to the create-rule of QR code, change its corresponding letter, and add identification code and full stop according to rule according to following table, finally generate QR code as shown in Figure 1.In figure, carry out the black and white block in the QR code in representative graph 1 with 0 and 1,0 represents white block, and 1 represents the black block.This QR code can be used by 0 and 1 data that form and combine to mean, as 1111110100001000100000 ... ..

What Fig. 2 meaned is the QR code that 7954 these Serial No.s generate, and its generative process is identical with the described example of above-mentioned Fig. 1, is not described in detail at this.

In this array 0 and 1 is numeral, and in general its actual storage condition is as follows:

A byte (8)

1

1

1

1

1

1

0

1

At first, by displacement operation (bit shifting) is carried out in the shared position of legacy data, legacy data step-by-step and original order all are encapsulated in 8 positions that each byte comprises, and the first byte (first 8) is set to 1,111 1111 form, show that this content is the data to store by compress mode.

At this moment the unified encapsulation of above-mentioned field can be deposited in this byte, and 0 result of replacing after Reseal also of formerly having vacant position is as follows:

1

1

1

1

1

1

0

1

By said method, can, by the script array all being encapsulated in a byte with 8 to 1 ratio, to reach the saving memory space, also reach the function that legacy data can be encrypted simultaneously.

After legacy data is filled, in the end on an extension bits (8), may leave space, form following situation.

1

0

1

?

?

?

?

?

At this moment need position more than the last extension bits that storage is used all to be filled to 0, become following storage condition.

1

0

1

0

0

0

0

0

Finally, insert full stop on next extension bits, front four bit-identifies of full stop are 0, and latter four are used for being illustrated on last expansion position and have several to be filled to be 0.The full stop of this example is as follows:

0

0

0

0

0

1

0

1

Show that all data have been compressed storage complete.Conveniently in follow-up decompression process, extract corresponding information.

Adopt this method also can carry out overlap-add procedure to two QR code information, the information unification of two QR codes is stored in to the purpose of same QR code.

What Fig. 2 was represented is the QR code that 7954 these Serial No.s generate, and its generative process is identical with the described example of above-mentioned Fig. 1, is not described in detail at this.

At first two width QR code figure are read to it accordingly by 0 and 1 information of carrying out the black and white block in the QR code in representative graph 1.According to the method for a upper example, the Information encapsulation in first QR code figure, in one or several byte, and is added to corresponding full stop according to above-mentioned form.Information encapsulation in second QR code figure, in other one or more bytes (comprise in the QR code data volume determine), and is added to corresponding full stop.All information is changed into to corresponding QR code, generate QR code as shown in Figure 3.

For the QR code of compressed rear generation, can adopt the above-mentioned method of compressing storage to carry out contrary the processing, at this, do not do more descriptions.

Above one embodiment of the present of invention are had been described in detail, but described content is only preferred embodiment of the present invention, can not be considered to be used to limiting practical range of the present invention.All equalizations of doing according to the present patent application scope change and improve etc., within all should still belonging to patent covering scope of the present invention.

Claims (1)

1. the compression of a QR code and encryption method, it is characterized in that: described method comprises:

1) original QR code is read as to binary information;

2) original information is carried out to displacement operation (bit shifting) encapsulation of data;

The indications that 3) will show compressed format is inserted the space after original information carries out displacement operation (bit shifting) operation;

4) original information is deposited in successively original information shared everybody carry out the space after displacement operation (bit shifting) operation;

5) original information being stored into to last 8 bit spaces after expansion mend is 0.

6) last 8 bit spaces after next expansion are filled full stop;

7) data after aforesaid operations are regenerated to the QR code.

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