CN102279934A - Method for encoding two-dimensional code - Google Patents

Abstract

The invention discloses a method for encoding a two-dimensional code. The method comprises the following steps of: designing a basic identification point, wherein the basic identification point consists of 3*3 pixel points, and all code patterns consist of basic identification points; generating a combination of all codes according to the distance variation among the basic identification points; designing a pattern encoding shape consisting of 25 basic identification points; setting displacement properties of the basic identification points; and forming an encoding sequence through the displacement variation of the basic identification points. Encoding in the scheme has high invisibility, and the aesthetic degree of publications is not influenced basically by recessive printing; the encoding method is simple and has low requirement on the printing accuracy; decoding operation can be trusted on an ordinary 8-bit singlechip; and the code word redundancy is high, larger printing errors are allowed and the error probability is lowered.

Description

The coding method of two-dimension code

Technical field

The present invention relates to the encoding of graphs field, two-dimensional encoded, the coding/decoding method of especially a kind of mathematics stealth, and printed article is used.

Background technology

The present reading habit of people is with eyes direct reading books, this mode of obtaining information is comparatively uninteresting, especially can not satisfy the requirement that the child obtains information, the limitation because the child becomes literate, and the hobby of information representation (liked more that both pictures and texts are excellent, picture and text sound and luxuriant information representation mode), and can not satisfy physical disabilities' needs, such as the dysopia personage.So sound reading mode, diagram reading method engender.

Present being seen talking book is the plain code printing basically, such as bar code.This coding is unfavorable for whole composing of reading matter and requirement attractive in appearance very much, and can not be hidden within the picture and text.Owing to be plain code, can not satisfy privacy requirements.

That can see at present is stealthy two-dimensional encoded, and its coded system and immature causes the printing precision requirement too highly, and the bit error rate is too high, and decoding is complicated, requires too high to optical accuracy.Can not commercialization

The invisible two-dimensional codes that can see at present can not be really stealthy, influences very much the aesthetics of printing item.

The invisible two-dimensional codes that can see because coding is immature, causes decoding complicated at present, and is too high to the microcomputer performance requirement, is unfavorable for marketing.

Summary of the invention

At the problems referred to above, the present invention aims to provide that a kind of coding is simple, the carrying data volume is big, the low invisible two-dimensional codes coding method of printing error probability.

For realizing this technical purpose, the solution of the present invention is: a kind of coding method of two-dimension code comprises as follows:

The sign indicating number shape that a, design are become by one group of 25 solid black point set of symbols, the valid pixel of described code element is 3 * 3, the mutual gauged distance between the code element is 16 pixels;

B, with first row of each yard shape with first classify position line as, the 4th code element of the 5th code element fifth line of second code element of second row of sign indicating number shape, the 3rd code element of the third line, fourth line is anchor point;

C, the whole code elements except that position line and anchor point are set at the numerical value code element, and carry out high status according to from left to right capable preface and row preface from top to bottom and arrange;

D, each code element set five possible positions, should be (0,0) with respect to its coordinate offset of standard code shape; (2,2); (2 ,-2); (2,2); (2 ,-2), wherein, drop on the position line and anchor point on code element coordinate one be decided to be (0,0); The code element that drops on the numerical point is (0,0) scarcely, but the code element that drops on the numerical point can be (2,2); (2 ,-2); (2,2); Any one of (2 ,-2).

In whole code sets, reserve 43 powers and be used as redundancy check.

The coding of this programme possesses the height hidden property, and recessive printing does not influence the aesthetics of publication substantially; Coding method is simple, and is less demanding to printing precision; Decoding is simple, and general 8 single-chip microcomputers are trusted decoding computing; Code word is redundant big, allows printing error bigger, and error probability reduces.

Description of drawings

Fig. 1 is sign indicating number shape figure of the present invention.

Fig. 2 is a numerical value symbol diagram of the present invention.

Fig. 3 is an element position coding synoptic diagram of the present invention.

Embodiment

Below in conjunction with the drawings and specific embodiments the present invention is described in further details.

The coding method of two-dimension code of the present invention is:

I. the sign indicating number shape:

A sign indicating number shape is made up of one group of 25 code element, and code element is solid stain, and the valid pixel of each code element is 3X3, retouches the black solid dot that is.Mutual gauged distance between the code element is 16 pixels, as shown in Figure 1.

Ii. position line and anchor point:

First row and first of each yard shape is classified position line as, and the 4th code element of the 5th code element fifth line of second code element of second row of sign indicating number shape, the 3rd code element of the third line, fourth line is anchor point.

Iii. numerical value code element:

More than the whole code elements except that position line and anchor point are the numerical value code element, and according to as shown in Figure 2 high low level series arrangement,

Iv. element position:

Each code element has five possible positions.With respect to standard code shape, the coordinate offset of code element should be (0,0); (2,2); (2 ,-2); (2,2); (2 ,-2).As shown in Figure 3.Wherein, drop on the position line and anchor point on code element coordinate one be decided to be (0,0).The code element that drops on the numerical point is (0,0) scarcely, but the code element that drops on the numerical point can be (2,2); (2 ,-2); (2,2); Any one of (2 ,-2).

V. according to more than, all code sets should be 16777216 (4 12 sides), wherein reserve 43 sides and are used as redundancy check, so the available code set of this encoding scheme reality should be 262144 (4 9 sides).

Vi. generate coding:

Instrument generates the individual numbering of 0-262144 (4 9 sides), input redundancy check instrument, and the scope of obtaining is 0-16777216 (4 12 sides') an actual coding sequence, quantity is 262144 (4 9 sides).

Vii. spread sign indicating number:

Shop sign indicating number instrument is according to above-mentioned sign indicating number shape, the individual actual coding sign indicating number shape of output 262144 (4 9 sides).

Claims (2)

1. the coding method of a two-dimension code comprises as follows:

The sign indicating number shape that a, design are become by one group of 25 solid black point set of symbols, the valid pixel of described code element is 3 * 3, the mutual gauged distance between the code element is 16 pixels;

B, with first row of each yard shape with first classify position line as, the 4th code element of the 5th code element fifth line of second code element of second row of sign indicating number shape, the 3rd code element of the third line, fourth line is anchor point;

C, the whole code elements except that position line and anchor point are set at the numerical value code element, and carry out high status according to from left to right capable preface and row preface from top to bottom and arrange;

D, each code element set five possible positions, should be (0,0) with respect to its coordinate offset of standard code shape; (2,2); (2 ,-2); (2,2); (2 ,-2), wherein, drop on the position line and anchor point on code element coordinate one be decided to be (0,0); The code element that drops on the numerical point is (0,0) scarcely, but the code element that drops on the numerical point can be (2,2); (2 ,-2); (2,2); Any one of (2 ,-2).

2. the coding method of two-dimension code according to claim 1 is characterized in that: reserve 43 powers and be used as redundancy check in whole code sets.

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