CN108182466A - A kind of circular two-dimensional identification code and its scanning recognition method - Google Patents
A kind of circular two-dimensional identification code and its scanning recognition method Download PDFInfo
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/06009—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code with optically detectable marking
- G06K19/06037—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code with optically detectable marking multi-dimensional coding
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/06009—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code with optically detectable marking
- G06K19/06046—Constructional details
- G06K19/06075—Constructional details the marking containing means for error correction
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/06009—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code with optically detectable marking
- G06K19/06046—Constructional details
- G06K19/06168—Constructional details the marking being a concentric barcode
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/14—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation using light without selection of wavelength, e.g. sensing reflected white light
- G06K7/1404—Methods for optical code recognition
- G06K7/1408—Methods for optical code recognition the method being specifically adapted for the type of code
- G06K7/1417—2D bar codes
Abstract
The present invention relates to a kind of circular two-dimensional identification codes, it is formed by dark closing interior annular and positioned at the interior annular periphery and with the dark circular arc of interior annular phase separation, the circular arc has the same center of circle with the interior annular, the rest part of the circular two-dimensional identification code is light color, the circular arc is the part using the center of circle as the center of circle, using the radius of circular arc as the outer toroid of radius, the circular arc is 1 section of circular arc, or 2 sections, 3 sections, the 4 sections or 5 sections circular arcs to be separated from each other, all the sum of circumferential lengths of the circular arc are the 8/13 of the outer toroid perimeter；The interior annular is equal with the width of the circular arc；The radius of the circular arc is twice of the interior annular radius.The invention further relates to a kind of such as the scanning recognition method of above-mentioned circular two-dimensional identification code.The present invention is especially suitable for the Internet of Things application scenarios for needing while quickly scanning multiple products.
Description
Technical field
The present invention relates to a kind of circular two-dimensional identification code and its scanning recognition methods, belong to Internet of Things field, more specific next
It says and belongs to computer picture intellectual analysis field.
Background technology
In the industrial chain of Internet of Things, cognition technology is key foundation technology, and Quick Response Code is then the important of cognition technology
Component content.Currently, planar bar code technology has apparent impetus to the development of Internet of Things industry.
Quick Response Code refers to expand the bar code with computer readable of another dimension on the basis of one-dimension code, leads to
Often using black and white pattern, the i.e. recognizable data information wherein included after being scanned by relevant device.Common Quick Response Code includes
QR codes (quick response matrix figure code), PDF417 bar codes, Chinese letter co etc..
Quick Response Code of the prior art is most commonly seen with QR codes.QR codes have anchor point and fault tolerant mechanism so that it is in sight
Make not recognize whole pattern in 2 D code or when Quick Response Code is stained, can also correctly restore the letter on Quick Response Code
Breath.
However the QR codes of the prior art have the following disadvantages：1) recognizer is complex, causes barcode scanning speed slower, knows
The other time is longer；2) pattern area occupied is larger, and Quick Response Code is difficult to be printed thereon when product is smaller；3) scanning resolution is relatively low
It can not be used when (such as 640*480)；4) cannot in same picture simultaneously the multiple Quick Response Codes of scanning recognition.
Invention content
Part in order to overcome the above-mentioned deficiencies of the prior art, the present invention provides a kind of circular two-dimensional identification code and its scannings
Recognition methods.
A kind of circular two-dimensional identification code, by dark closing interior annular 10 and positioned at 10 periphery of interior annular and with
The dark circular arc 20,21 that the interior annular 10 is separated forms, and the circular arc 20,21 has the same center of circle with the interior annular 10
30, the rest part of the circular two-dimensional identification code is light color；It is characterized in that：The circular arc 20,21 is opening circular arc, is
Using the center of circle 30 for the center of circle, using the radius of circular arc 20,21 as a part for the outer toroid 40 of radius.
According to the circular two-dimensional identification code, it is characterised in that：The circular arc 20,21 is 1 section of circular arc or is mutual point
From 2 sections, 3 sections, 4 sections or 5 sections circular arcs, all the sum of circumferential lengths of the circular arcs 20,21 are 40 perimeters of outer toroid
8/13。
According to the circular two-dimensional identification code, it is characterised in that：The width of the interior annular 10 and the circular arc 20,21
Width it is equal, and the radius of the circular arc 20,21 is twice of 10 radius of interior annular.
According to the circular two-dimensional identification code, it is characterised in that：Circular two-dimensional identification code pattern is not less than 25*25 pictures
Element.
According to the circular two-dimensional identification code, it is characterised in that：The periphery of the circular arc 20,21 is also at least one circle
Additional circular arc 51, which is opening circular arc or closed circle.
According to the circular two-dimensional identification code, it is characterised in that：The width of the interior annular 10 and the additional circular arc
51 width is equal, and the radius of the additional circular arc 51 is the integral multiple of 10 radius of interior annular.
A kind of scanning recognition method of foregoing circular two-dimensional identification code, step are：
Step 1：Calculating is shot or directly inputs by a picture file containing circular two-dimensional identification code by camera to set
It is standby；
Step 2：The picture file gray processing is identified 10 figure of closing interior annular of all dark colors therein by computing device
Case；
Step 3：Computing device scans the outer toroid 40 of each 10 periphery of interior annular, identifies that the uneven color of the outer toroid 40 is handed over
At boundary；
Step 4：Each described 40 decile of outer toroid is divided into 13 sectors by computing device from above-mentioned uneven color intersection
40a-40m, and identify the gray scale of each sector；If the quantity that the quantity of dark sector is equal to 8 or light sectors is equal to 5, recognize
The fixed pattern is correct circular two-dimensional identification code, and dark sector is denoted as 0, light sector and is denoted as 1, by counterclockwise or up time
13 above-mentioned sector 40a-40m are arranged as the binary data of one 13, and go successively to next step by needle sequence；If
Dark sector it is in varying numbers in the in varying numbers in 5 of 8 or light sectors, then it is not circular two-dimensional identification code to assert the pattern,
No longer it is for further processing to it；
Step 5：Each above-mentioned 13 bit binary data is subjected to shifting function respectively, the shifting function is：By binary system
The first number of data moves to last position or moves the last figure of binary data to first place；To each 13 bit
12 shifting functions are carried out according to cycle respectively, each binary data generates the binary data after 12 displacements, then upper
State in the binary data and not shifted initial binary data after 12 displacements, to it is wherein the first for 0 and end position be 1
Binary data preserved, other data do not preserve, then then in the binary data of above-mentioned all preservations take minimum
Value, the binary data that as a circular two-dimensional identification code is stored of the minimum value；So move in circles to obtain each
The binary data that circular two-dimensional identification code is stored.
According to the scanning recognition method, it is characterised in that：The picture file is known including at least one circular two-dimensional
Other code.
According to the scanning recognition method, it is characterised in that：The binary number that the circular two-dimensional identification code is stored
According to for one in following binary data：0000000011111、0000000101111、0000000110111、
0000000111011、0000000111101、0000001001111、0000001010111、0000001011011、
0000001011101、0000001100111、0000001101011、0000001101101、0000001110011、
0000001110101、0000001111001、0000010001111、0000010010111、0000010011011、
0000010011101、0000010100111、0000010101011、0000010101101、0000010110011、
0000010110101、0000010111001、0000011000111、0000011001011、0000011001101、
0000011010011、0000011010101、0000011011001、0000011100011、0000011100101、
0000011101001、0000011110001、0000100001111、0000100010111、0000100011011、
0000100011101、0000100100111、0000100101011、0000100101101、0000100110011、
0000100110101、0000100111001、0000101000111、0000101001011、0000101001101、
0000101010011、0000101010101、0000101011001、0000101100011、0000101100101、
0000101101001、0000101110001、0000110000111、0000110001011、0000110001101、
0000110010011、0000110010101、0000110011001、0000110100011、0000110100101、
0000110101001、0000110110001、0000111000101、0000111001001、0000111010001、
0001000100111、0001000101011、0001000101101、0001000110011、0001000110101、
0001000111001、0001001000111、0001001001011、0001001001101、0001001010011、
0001001010101、0001001011001、0001001100011、0001001100101、0001001101001、
0001010001011、0001010001101、0001010010011、0001010010101、0001010011001、
0001010100011、0001010100101、0001010101001、0001011001001、0001100011001、
0001100100101、0001100101001、0001101001001、0010010010011、0010010010101、
0010010100101。
According to the scanning recognition method, it is characterised in that：
1) between above-mentioned steps 4 and step 5, following steps are further included：
Step 4.1：The additional annulus 52 of each correctly circular two-dimensional identification code of computing device scanning, by additional 52 decile of annulus
Be divided into 13 sectors, and detect the gray scale of each sector, dark sector is denoted as 0, light sector is denoted as 1, by counterclockwise or
13 above-mentioned sector alignments are the appended binary data of one 13 by clock-wise order, and go successively to next step；
And 2) further include following steps after above-mentioned steps 5：
Step 5.1：Shifting function, the direction of each shifting function and number and attached with this are carried out to each appended binary data
Add the binary data in the step 5 that binary data is located in same circular two-dimensional identification code pattern identical, so obtain every
The appended binary data that the additional annulus of one circular two-dimensional identification code is stored.
Through the above scheme and means, the present invention provides a kind of circular two-dimensional identification code and its scanning recognition method,
Recognition speed is improved, and pattern is simple under the premise of identification accurately is ensured, can be printed on the smaller product of area,
It can be used in the case of relatively low scanning resolution, moreover it is possible to identify multiple circular two-dimensional identification codes simultaneously in same picture, it is special
It is not applicable to quickly scan the Internet of Things application scenarios of multiple products simultaneously.
Description of the drawings
Fig. 1 is the printed patterns of first embodiment of the invention circular two-dimensional identification code.
Fig. 2 is the schematic diagram of first embodiment of the invention circular two-dimensional identification code.
Fig. 3 is the scanning recognition flow chart of first embodiment of the invention circular two-dimensional identification code.
Fig. 4 is the printed patterns of second embodiment of the invention circular two-dimensional identification code.
Fig. 5 is the schematic diagram of second embodiment of the invention circular two-dimensional identification code.
Reference numeral：10th, interior annular；20th, circular arc；21st, circular arc；30th, central point；40th, outer toroid；40a to 40m：Sector；
50th, there is the circular two-dimensional identification code of additional circular arc；51 additional circular arcs；52nd, annulus is added.
Specific embodiment
Embodiment 1
The pattern of circular two-dimensional identification code of the present invention is described below.
Fig. 1 shows the printed patterns of circular two-dimensional identification code of the present invention, by internal interior annular 10 and the circle of periphery
Arc 20,21 forms.
Fig. 2 is the principle schematic of above-mentioned circular two-dimensional identification code.Interior annular 10 is the annulus of closing, centered on the center of circle
Point 30, the central point 30 are the central point of entire circular two-dimensional identification code pattern.Circular arc 20 and 21 have the identical center of circle and
Radius, i.e. circular arc 20 and 21 are located in same outer toroid 40, and the center of circle of outer toroid 40 is central point 30；The half of outer toroid 40
Diameter is twice of interior annular 10；Outer toroid 40 is divided into 13 sections, and each section is a sector, forms sector 40a to 40m.Fig. 2
In continuous six sectors 40a, 40m, 40l, 40k, 40j and 40i be black, form circular arc 20；Continuous two sector 40g
Also it is black with 40f, forms circular arc 21.Remaining five sectors 40b, 40c, 40d, 40e and 40h are not colored, are original
White.13 sector 40a to 40m represent 13 binary codes, and wherein black sectors are encoded to 0, white sectors 1.
Such as the pattern of Fig. 2, the binary code that sector 40a to 40m is formed in order is " 0111100100000 ".
It can be seen that circular two-dimensional identification code pattern of the present invention is simple, therefore is suitble to be printed on the smaller product of area,
And it can be identified even if in the case of relatively low scanning resolution.The circular two-dimensional identification code pattern minimum of the present invention can be
It is identified in the case of 25*25 pixels.
It should be noted that：Fig. 1 and Fig. 2 is only an example of circular two-dimensional identification code of the present invention, according to 13 sectors
Black-and-white groups different 40a to 40m, circular two-dimensional identification code of the invention can form a variety of different patterns, each pattern
A kind of corresponding unique binary code；In addition, circular two-dimensional identification code of the present invention is not required for being black-and-white two color, requiring nothing more than is
The dark color and light color of light and shade can be significantly distinguished after gray processing.
Further, circular two-dimensional identification code of the present invention shares 99 different patterns, corresponding 99 different binary systems
Code, coding schedule are as follows：
As previously mentioned, the binary code that sector 40a to 40m is formed in Fig. 2 is " 0111100100000 ", if but change fan
The sequence in area, the inverse time needle sort since 40a, i.e., according to 40a, 40m, 40l, 40k, 40j, 40i, 40h, 40g, 40f, 40e,
The sequence of 40d, 40c, 40b, then corresponding binary code is " 0000001001111 ", it can be seen that itself and number in upper table 6
Binary code is corresponding.
Above-mentioned 99 binary codes are worked out by being specifically designed, with following features：1) each binary code
In " 1 " number total be five, the number of " 0 " total is eight；2) first place of each binary code is " 0 ", end
Position is " 1 "；If 3) in coding schedule any one binary code carry out shifting function (i.e. by the first number move to last position,
Or last figure is moved to first place), other first places of formation are " 0 ", last position is in the binary code of " 1 ", neither one two into
Code processed can be than the binary code numerical value smaller in above-mentioned coding schedule.
These characteristics are very beneficial for improving the recognition speed and precision of the circular two-dimensional identification code, and specific recognition methods will
It is introduced below.
The scanning recognition method of circular two-dimensional identification code of the present invention is introduced with reference to Fig. 3.
S1. picture is obtained
Computer shoots image by camera, obtains picture；Or one existing picture of input.M are included in picture
Circular two-dimensional identification code.
S2. the closed circle in picture is identified
Computer progressively scans picture, and gray processing is carried out, and identify the closing inner circle of all dark colors in picture to picture
Ring patterns.Algorithms most in use of the prior art may be used in the algorithm of identification closed circle herein, such as Hough transform method, minimum two
Multiply ellipses detection method etc..Due to identifying there are error and fault tolerance requirements, total will recognize n closing interior annular (n >=m),
The inner circle ring patterns of closing are labeled as C successively herein1、C2……Cn；And calculate the center location of each closing interior annular
O1、O2……On, width W1、W2……WnWith interior annular peripheral radius R1、R2……Rn。
S3. the peripheral circles pattern of closed circle is scanned
First with center of circle O1Centered on point, scan its radius as 2R1-W1To 2R1Between peripheral circles pattern, know
The position of gray scale suddenly change in not above-mentioned peripheral circles pattern, which is uneven color intersection in pattern, herein should
Peripheral circles icon indicia is Z1；Then with center of circle O2Centered on point, scan its radius as 2R2-W2To 2R2Between periphery
Annulus pattern identifies the position of gray scale suddenly change in above-mentioned peripheral circles pattern, is by the peripheral circles icon indicia herein
Z2；So cycle, respectively with center of circle O3、O4……OnCentered on point, scan its radius as 2R3-W3To 2R3、2R4-W4Extremely
2R4……2Rn-WnTo 2RnBetween peripheral circles pattern, above-mentioned peripheral circles pattern be Z3、Z4……Zn。
S4. the binary data of peripheral circles pattern is verified
First with from outer circle ring patterns Z1Above-mentioned uneven color intersection for initial position, by peripheral circles pattern Z1Decile
13 sectors are divided into, and detect the gray scale of each sector, it is 0 to enable dark sector numerical value, light sector numerical value is 1, in calculating
The sum of numerical value is stated, if the sum of above-mentioned numerical value is 5, it is legal (meeting above-mentioned coding schedule rule) two to show peripheral circles
Binary data, and preserve the binary data that 13 above-mentioned sector alignments are one 13 by clock-wise order, so
After continue to verify next peripheral circles pattern Z2；If the sum of above-mentioned numerical value is not 5, show that peripheral circles are free of legal number
According to being no longer for further processing to the pattern, not preserving any data, continue to verify next peripheral circles pattern；So follow
Ring verifies all peripheral circles pattern Z1、Z2……Zn, through verification, it is 5 to recognize the sum of m light sector numerical value in total
Legal binary data corresponding to them is labeled as Y by peripheral circles pattern1、Y2……Ym。
S5. the binary data that circular two-dimensional identification code is stored is read
By binary data Y1Shifting function is carried out, i.e., the first number is moved to last position and (or moved last figure to head
Position)；Then shifting function is carried out again to the data after displacement, so cycle amounts to displacement 12 times；Including do not shift two into
13 binary data are obtained inside in data processed, to it is wherein the first for 0 and last position be 1 binary data preserve,
He does not preserve data；Be in the first place of all preservations 0 and last position be 1 data in, choose the data of binary value minimum, herein
Minimum binary data is labeled as X1, and record and obtain above-mentioned binary data X1The number for the shifting function undergone
N1.；Again successively to Y2、Y3……YmIt is processed as above, obtains binary data X successively2、X3……Xm, and correspondingly shift
Times N2、N3……Nm.Above-mentioned binary data X1、X2……XmThe binary system that as m circular two-dimensional identification code stores respectively
Data.
Above-mentioned scanning recognition method has the following advantages that：1) checking algorithm is simple, is conducive to improve recognition speed：In step
In S4, the present invention, which only needs to do simple add operation, can be realized verification, without using complicated checking algorithm；2) without locating piece
Pattern saves pattern area；Without locating piece is found during identification, be conducive to improve recognition speed：QR codes will pass through 3 positioning
Block diagram case realizes angle positioning, and the present invention is in step s 5, carries out simple 12 shifting functions and most 5 numerical value are taken
The operation of minimum value is dexterously realized can also accurately identify in the case of no locating piece；It 3) can be in same picture simultaneously
Identify multiple circular two-dimensional identification codes：Step S2 to S5 considers the feelings in a pictures with multiple circular two-dimensional identification codes
Shape, it can be achieved that identify simultaneously.
Embodiment 2
Embodiment 2 is being further improved on the basis of embodiment 1.Referring to attached drawing 4 to 5, the circular two-dimensional identification code 50
Compared with Fig. 1 and 2, a circle circular arc is increased, the structure of the circular arc is similar to circular arc 20,21, is called additional circular arc 51 herein,
It is a part for additional annulus 52.Additional circular arc 51 is used to store more binary data, width and 10 phase of interior annular
Same, peripheral radius is twice of interior annular 10.
The recognizer of circular two-dimensional identification code 50 and above-mentioned steps S1 to S5 are essentially identical, the difference lies in：
1) after above-mentioned steps S4 terminates, before above-mentioned steps S5 starts, following steps are further included：
S4.1. it is labeled as Y firstly, for legal binary data1Corresponding circular two-dimensional identification code, using its center of circle as
Central point scans its radius as 3R1-W1To 3R1Between additional annulus 52, and in above-mentioned steps S3 uneven color hand over
At boundary and O1Between the angle that is formed be initial position, additional 52 decile of annulus is divided into 13 sectors, and detect each
The gray scale of sector, it is 0 to enable dark sector numerical value, light sector numerical value is 1, and arranges 13 above-mentioned sectors by clock-wise order
It is classified as the binary data of one 13 to be preserved, the binary data of the preservation is labeled as A herein1.So cycle is right
Other legal binary data Y2、Y3……YmCorresponding circular two-dimensional identification code also carries out above-mentioned steps respectively, obtain two into
Data A processed2、A3……Am。
2) after above-mentioned steps S5 terminates, following steps are further included：
S5.1. firstly, for binary data A1, carried out N1Shifting function, obtained binary data mark herein
For B1.So cycle, to other binary data A2、A3……AmAlso carry out above-mentioned steps respectively, obtain B2、B3……Bm。
Above-mentioned binary data B2、B3……BmThe binary data that the additional circular arc of as m circular two-dimensional identification code is stored.
Further, above-mentioned additional circular arc 51 can it is more than one circle, i.e., except circular arc 20,21 set multi-turn add circle
Arc can increase the data volume that circular two-dimensional identification code of the present invention is stored.
Through the above scheme and means, the present invention provides a kind of circular two-dimensional identification code and its scanning recognition method,
Recognition speed is improved, and pattern is simple under the premise of identification accurately is ensured, can be printed on the smaller product of area,
It can be used in the case of relatively low scanning resolution, moreover it is possible to identify multiple circular two-dimensional identification codes simultaneously in same picture, it is special
It is not applicable to quickly scan the Internet of Things application scenarios of multiple products simultaneously.
Claims (10)
1. a kind of circular two-dimensional identification code, by dark closing interior annular (10) and positioned at the interior annular (10) periphery and
It is formed with the dark circular arc (20,21) of the interior annular (10) phase separation, the circular arc (20,21) has with the interior annular (10)
There is the same center of circle (30), the rest part of the circular two-dimensional identification code is light color；It is characterized in that：The circular arc (20,21)
Opening circular arc, be using the center of circle (30) be the center of circle, one using the radius of circular arc (20,21) as the outer toroid (40) of radius
Part.
2. circular two-dimensional identification code according to claim 1, it is characterised in that：The circular arc (20,21) is 1 section of circular arc,
Or 2 sections, 3 sections, the 4 sections or 5 sections circular arcs to be separated from each other, all the sum of circumferential lengths of the circular arc (20,21) are described outer
The 8/13 of annulus (40) perimeter.
3. circular two-dimensional identification code according to claim 1 or 2, it is characterised in that：The width of the interior annular (10) with
The width of the circular arc (20,21) is equal, and the radius of the circular arc (20,21) is twice of the interior annular (10) radius.
4. the circular two-dimensional identification code according to claim 1-3, it is characterised in that：Circular two-dimensional identification code pattern is not less than
25*25 pixels.
5. the circular two-dimensional identification code according to claim 1-4, it is characterised in that：The periphery of the circular arc (20,21) is also
With the additional circular arc (51) of at least one circle, which is opening circular arc or closed circle.
6. circular two-dimensional identification code according to claim 5, it is characterised in that：The width of the interior annular (10) with it is described
The width of additional circular arc (51) is equal, and the radius of the additional circular arc (51) is the integral multiple of the interior annular (10) radius.
7. a kind of scanning recognition method of such as circular two-dimensional identification code of one of claim 1-6, step are：
Step 1：Calculating is shot or directly inputs by a picture file containing circular two-dimensional identification code by camera to set
It is standby；
Step 2：The picture file gray processing is identified closing interior annular (10) figure of all dark colors therein by computing device
Case；
Step 3：Computing device scans the outer toroid (40) of each interior annular (10) periphery, identifies the depth of the outer toroid (40)
Light intersection；
Step 4：Each described outer toroid (40) decile is divided into 13 fans by computing device from above-mentioned uneven color intersection
Area (40a-40m), and identify the gray scale of each sector；If the quantity that the quantity of dark sector is equal to 8 or light sectors is equal to 5,
Then assert the pattern for correct circular two-dimensional identification code, and dark sector be denoted as 0, light sector and is denoted as 1, by counterclockwise or
13 above-mentioned sectors (40a-40m) are arranged as the binary data of one 13, and go successively to next by clock-wise order
Step；If dark sector is in varying numbers in the in varying numbers in 5 of 8 or light sectors, it is not circular two-dimensional to assert the pattern
Identification code is no longer for further processing to it；
Step 5：Each above-mentioned 13 bit binary data is subjected to shifting function respectively, the shifting function is：By binary system
The first number of data moves to last position or moves the last figure of binary data to first place；To each 13 bit
12 shifting functions are carried out according to cycle respectively, each binary data generates the binary data after 12 displacements, then upper
State in the binary data and not shifted initial binary data after 12 displacements, to it is wherein the first for 0 and end position be 1
Binary data preserved, other data do not preserve, then then in the binary data of above-mentioned all preservations take minimum
Value, the binary data that as a circular two-dimensional identification code is stored of the minimum value；So move in circles to obtain each
The binary data that circular two-dimensional identification code is stored.
8. scanning recognition method according to claim 7, it is characterised in that：The picture file includes at least one circle
Two-dimension identification code.
9. scanning recognition method according to claim 7 or 8, it is characterised in that：The circular two-dimensional identification code is stored
Binary data be one in following binary data：0000000011111、0000000101111、
0000000110111、0000000111011、0000000111101、0000001001111、0000001010111、
0000001011011、0000001011101、0000001100111、0000001101011、0000001101101、
0000001110011、0000001110101、0000001111001、0000010001111、0000010010111、
0000010011011、0000010011101、0000010100111、0000010101011、0000010101101、
0000010110011、0000010110101、0000010111001、0000011000111、0000011001011、
0000011001101、0000011010011、0000011010101、0000011011001、0000011100011、
0000011100101、0000011101001、0000011110001、0000100001111、0000100010111、
0000100011011、0000100011101、0000100100111、0000100101011、0000100101101、
0000100110011、0000100110101、0000100111001、0000101000111、0000101001011、
0000101001101、0000101010011、0000101010101、0000101011001、0000101100011、
0000101100101、0000101101001、0000101110001、0000110000111、0000110001011、
0000110001101、0000110010011、0000110010101、0000110011001、0000110100011、
0000110100101、0000110101001、0000110110001、0000111000101、0000111001001、
0000111010001、0001000100111、0001000101011、0001000101101、0001000110011、
0001000110101、0001000111001、0001001000111、0001001001011、0001001001101、
0001001010011、0001001010101、0001001011001、0001001100011、0001001100101、
0001001101001、0001010001011、0001010001101、0001010010011、0001010010101、
0001010011001、0001010100011、0001010100101、0001010101001、0001011001001、
0001100011001、0001100100101、0001100101001、0001101001001、0010010010011、
0010010010101、0010010100101。
10. the scanning recognition method according to claim 7-9, it is characterised in that：
1) between above-mentioned steps 4 and step 5, following steps are further included：
Step 4.1：The additional annulus (52) of each correctly circular two-dimensional identification code of computing device scanning, by additional annulus (52)
Decile is divided into 13 sectors, and detects the gray scale of each sector, and dark sector is denoted as 0, light sector is denoted as 1, by the inverse time
13 above-mentioned sector alignments are the appended binary data of one 13, and go successively in next step by needle or clock-wise order
Suddenly；And
2) after above-mentioned steps 5, following steps are further included：
Step 5.1：Shifting function, the direction of each shifting function and number and attached with this are carried out to each appended binary data
Add the binary data in the step 5 that binary data is located in same circular two-dimensional identification code pattern identical, so obtain every
The appended binary data that the additional annulus of one circular two-dimensional identification code is stored.
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