CN101615259B - Method for coding two-dimensional optical identification code, identification system and printed product thereof - Google Patents
Method for coding two-dimensional optical identification code, identification system and printed product thereof Download PDFInfo
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Abstract
The invention discloses a method for coding a two-dimensional optical identification code, an identification system and a printed product thereof. The two-dimensional optical identification code is provided with a positioning block and a plurality of data coding blocks at four sides of the positioning block; both the positioning block and the data coding blocks contain a plurality of designated patterns arrayed in N*M arrays; and the asymmetrical designated patterns consisting of a random row and a random column in the positioning block are filled, at least one designated pattern of the data coding blocks in the center is filled, and the residual designated patterns in the data coding blocks are selectively filled to express a binary code respectively, wherein N and M are natural numbers. The identification system comprises an optical reading device, a processing device and an output device, and is used for identifying coding information contained in the two-dimensional optical identification code on the printed product.
Description
Technical field
The invention relates to a kind of technology of optical identification code, and particularly relevant for a kind of coding method, recognition system of two-dimensional optical identification code and comprise the printed matter of this two-dimensional optical identification code.
Background technology
Optical identification code (Optical Identification, OID) be a kind of technology that can in general printed matter, hide numerical data and the hiding numerical data of acquisition, it can be by the print routine of standard and the printing ink of standard, numerical data is hidden in the general printed matter, with original pattern coexistence on the printed matter.See through optics and the image processing technique of optical identification pen (OID Pen), just can take out the data that are hidden in advance in the printed matter.
In the prior art, each optical identification code coded graphics generally is comprised of many trickle information points, and these information points are distributed in the block that two-dimensional optical identification code is used for beared information, is used to indicate the value of place block corresponding bit.Point in this optical identification code coded graphics is often overstocked, and it is even not to distribute, and when original pattern coexists on optical identification code and printed matter, can cause larger interference to vision, and the attractive in appearance of printed matter impacted.
Shown in Fig. 1 a and Fig. 1 b, Chinese patent application discloses a kind of two-dimensional encoded method No. 02122633.4, one of them coding Figure 10 has 6*6 state region 13, this state region 13 is divided into for the gauge outfit state region 11 of location and the content status zone 12 of presentation code data, wherein, each state region 13 is comprised of two states, picture point is namely arranged and without picture point, and the combinations of states of all state regions 13 is expressed as a coded message in this content status zone 112, shown in Fig. 1 (b), yet because the combinations of states of this state region 13 is along with coded data is different, 1 number is different with the position, namely there is the number of picture point indefinite, thereby causes the picture point that has of a code pattern to have the problem overstocked and pockety that distributes.On this two-dimensional encoded and printed matter during original pattern coexistence, in order to guarantee that vision is not caused larger interference, and do not affect the attractive in appearance of printed matter, thereby and exist restriction to affect the coded data that it can represent on the combinations of states of state region 13.
Jap.P. discloses another kind of coding method JP3706385 number, be illustrated in figure 2 as a design diagram that comprises the code pattern of a plurality of two-dimensional optical identification codes, one of them code pattern (zone that dotted line centers on) is arranged according to pre-defined rule by a key point 2, a plurality of grid point 4 and a plurality of information point 3 and is formed.Specifically, a code pattern disposes a plurality of grid point 4 around it centered by key point 2, and wherein per four grid point 4 are configured to a rectangular block; And the center of per four grid point 4 is as a virtual point, and the information point 3 that is positioned at rectangular block optionally is offset a segment distance in upper and lower a, left side or the right of described virtual point, to represent respectively different numerical value, reads when identification is read.Key point 2 is to form toward the mode that predetermined directions are offset a segment distance with the grid point 4 with a code pattern center, and key point can provide the reference direction of a code pattern, the orientation reference when reading during a magnified image.
Although it is relatively even that the more aforementioned code pattern of the point in this scheme distributes, because each information point of this code pattern is surrounded by 4 grid point, therefore in the identical situation of the density of the code pattern mid point that prints, its coded message that can express is less.And when the density of information point 3 was higher, visual effect will be poorer, and the existence of the easier perceptual coding figure of human eye, and the chance that code pattern and represented main information are obscured increases.
In addition, when code pattern formed in a limited body surface zone, under the prerequisite that the identical information amount is provided, too high information point distribution density can cause the distance of two adjacent information points too small; Disturb if reduce this vision, usually need the further size of reduction information point, but too small size can improve the resolution requirement to printing machine and paper, and also easily leakage during printing, increased the difficulty of printing, and caused easily read error or be difficult for resolution.On the other hand, if merely strengthen to avoid the point in the coded graphics overstocked the spacing of information point, the quantity of information that then can cause two-dimensional optical identification code to carry reduces.
Summary of the invention
In view of this, a purpose of the present invention provides a kind of coding method of two-dimensional optical identification code, uses so that the identification code behind the coding is evenly distributed, and the coded message of carrying is more.
Another object of the present invention just provides a kind of printed matter, so that this printed matter inside keeps customizing messages, and the effect of GTG is arranged visually etc.
Another purpose of the present invention provides a kind of recognition system of two-dimensional optical identification code, so that the vision that the coded graphics that this should the two dimension identification code causes is disturbed in the less situation, it can carry more coded message.
For reaching above-mentioned or other purposes, the present invention proposes a kind of coding method of two-dimensional optical identification code, comprise: provide to have location block and an a plurality of data encoding block, and those data encoding block arrangement are around this location block, in this location block, a plurality of appointment patterns are provided, wherein those specify pattern to be arranged in the array of N * M, at those data encoding blocks, a plurality of appointment patterns also are provided, and wherein those specify pattern to be arranged in respectively the array of N * M in those data encoding blocks; In this location block, one any row is filled with an appointment pattern that is listed as arbitrarily the asymmetric shape that consists of, in those data encoding blocks, at least one appointment pattern of position in central authorities filled up, and the remaining appointment pattern in each those data encoding block is filled up to represent respectively a binary code by selectivity; Wherein, N, M are natural number.
In order to achieve the above object, the present invention proposes again a kind of printed matter, comprises at least one two-dimensional optical identification code, and this two-dimensional optical identification code adopts above-mentioned coding method to encode and obtains.
In order to achieve the above object, the present invention proposes again a kind of recognition system of two-dimensional optical identification code, be used for utilizing the recognition device of two-dimensional optical identification code to read a body surface with a specific wavelength, obtain the coded graphics of a plurality of two-dimensional optical identification codes, wherein this body surface is printed with a plurality of marker figures, those coded graphicss have different optical characteristics from those marker figures, described each coded graphics has location block and an a plurality of data encoding block, and those data encoding block arrangement are around this location block, the appointment pattern that comprises a plurality of N of being arranged in * M array in this location block, each of those data encoding blocks comprise the appointment pattern of a plurality of N of being arranged in * M array; In this location block, one any row is filled with an appointment pattern that is listed as arbitrarily the asymmetric shape that consists of, in order to locate and to distinguish read direction, in those data encoding blocks, the position is filled at least one appointment pattern of central authorities, be used for auxiliary positioning, remaining appointment pattern in each those data encoding block is filled up to represent respectively a binary code by selectivity, wherein, N, M are natural number, the recognition device of described two-dimensional optical identification code is identified those coded graphicss on the described body surface, and the information that identifies is exported.
The spirit of such scheme is to provide the location block and locates the data encoding block of block around this, and the array of N * M is provided in above-mentioned block respectively.Since the location block one arbitrarily row with one arbitrarily the appointment pattern of the asymmetric shape that consists of of row be filled, so the optical identification device can be determined the direction that reads.And because the appointment pattern of the center in the data encoding block is filled the reference point as auxiliary positioning, so the optical identification device can read two-dimensional optical identification code more accurately.Because in the data encoding block, except the appointment pattern at center, all the other only have the appointment pattern of part to be filled, therefore, the coded graphics of the appointment pattern formation that is filled is more even, and density is less.When this coded graphics is used on the printed article, as long as coding is enough little, just can accomplish the visually effect of constant GTG.That is to say that the information coding that institute's wish can be hidden under the state that same human eye is ignored, can carry more coded message on printed article.
For above and other purpose of the present invention, feature and advantage can be become apparent, preferred embodiment cited below particularly, and cooperate appended graphicly, be described in detail below.
Description of drawings
Fig. 1 a and Fig. 1 b are respectively a kind of code pattern of existing two-dimensional optical identification code and the synoptic diagram of corresponding informance thereof.
Fig. 2 is the code pattern of another kind of existing two-dimensional optical identification code.
Fig. 3 is that a plurality of two-dimensional optical identification codes of one embodiment of the invention are arranged the coded graphics that forms.
Fig. 4 is the code pattern of the two-dimensional optical identification code among Fig. 3.
Fig. 5 is the code pattern according to the two-dimensional optical identification code shown in another embodiment of the present invention.
Fig. 6 a is the code pattern of the location block 201 of the two-dimensional optical identification code among Fig. 5.
Fig. 6 b is the another kind of code pattern of the location block among Fig. 6 a.
Fig. 7 is a code pattern of the data encoding block 202～209 of the two-dimensional optical identification code among Fig. 5.
Fig. 8 is another code pattern of the data encoding block 202～209 of the two-dimensional optical identification code among Fig. 5.
Fig. 9 is the code pattern of data encoding block of the two-dimensional optical identification code of another embodiment.
Figure 10 is the code pattern according to 2 * 3 two-dimensional optical identification code shown in further embodiment of this invention.
Figure 11 is the process flow diagram of the coding method of two-dimensional optical identification code according to an embodiment of the invention.
Figure 12 is the synoptic diagram according to the recognition system of one embodiment of the invention two-dimensional optical identification code.
Embodiment
Fig. 3 shows the designed a plurality of two-dimensional optical identification codes of one embodiment of the invention 10 and arranges the coded graphics that forms, and Fig. 4 shows the code pattern of single two-dimensional optical identification code 10 among Fig. 3, to clearly demonstrate design of the present invention.Please refer to Fig. 4, this two-dimensional optical identification code comprises location block 101 and 8 data encoded block 102～109, and these 9 blocks have consisted of the code pattern of a two-dimensional optical identification code.These 8 data encoded block 102～109 are configured to nine grids, 9 rectangles that namely are shown in broken lines among the figure with location block 101.Design Orientation block 101 mainly is to allow the optical pickup device that reads this two-dimensional optical identification code can distinguish institute's read direction.Therefore, in this location block 101, the hollow dots that for example left hand edge and coboundary are adjacent is filled, and blacking is in order to the location.In addition, the hollow dots in the middle of data encoding block 102～109 is positioned at is filled, and as the reference point of auxiliary positioning, other each locational hollow dots represent respectively a binary digit, are also referred to as data point.Figure can find out thus, and 8 data points of each data encoding block 102～109 are respectively in order to represent 000,001,010,011,100,101,110 and 111.Therefore, each data encoding block data of all can be used for enrolling 3 bits.The residue of block 101 except anchor point 4 hollow dots in location also can be used as data point, respectively in order to represent 00,01,10 and 11.Therefore, location block 101 can be in order to enroll the data of 2 bits.Circular hollow dots is that the present embodiment two-dimensional optical identification code is used among Fig. 4, in the appointment pattern that fills up, it should be noted that, appointment pattern marking in the two-dimensional optical identification code position and the shape in the zone that can fill up, specify the profile of pattern although drawn each among Fig. 4, but the appointment pattern that only needs printing to fill up on the actual coding figure of printed matter, the profile of the appointment pattern that does not fill up there is no need to print up.All possesses location block 101 according to single two-dimensional optical identification code 10 among Fig. 3, and location block for example left hand edge and the adjacent hollow dots of coboundary is filled in order to the location, simultaneously, the hollow dots at data encoding block 102～109 centers around the location block 101 is filled, as the reference point of auxiliary positioning.Therefore, the coded graphics that a plurality of two-dimensional optical identification codes 10 are arranged formation from Fig. 4 can be seen, because the location that the reference point of auxiliary positioning is finished jointly in location block and the data encoding block can not obscured between the adjacent two-dimensional optical identification code.Even a plurality of two-dimensional optical identification codes 10 also can not be subject to closing on the interference of optical identification code without the placement that separates as seen from Figure 4.
When data being enrolled a data encoded block, for example data of 3 bits.Because each data point in the data encoding block except central point has represented the binary code of 3 different bits.Therefore, in this embodiment, each data encoding block only has at most a data point to be filled; In addition, the data of 2 bits can also be enrolled the location block, location block 101 has 4 hollow dots to can be used as data point except anchor point, wherein at most also only has a data point to be filled.
A nine grids two-dimensional optical identification code is a group code, and 8 data encoded block in each nine grids can define arbitrarily coded sequence.With present technology, generally can accomplish one inch 800 points (800DPI).Along with the progress of optically read science and technology, this kind coding also can be more and more less.If take this embodiment as example, can insert 88 group codes for one square inch.Moreover, because in the present embodiment, each two-dimensional optical identification code has 9 blocks 101～109, and fixedly only have 2 hollow dots to be filled in 9 hollow dots of each data encoding block inside, that is reference point and a data point, the hollow dots that is filled (being also referred to as filling point) distribution on the whole is more even, and density is less.Because the GTG such as grade of vision is relevant with the size of the spacing of filling point and filling point, vision was more obvious when higher, more inhomogeneous or filling point was larger when between points density, more hour vision is more not obvious for lower, more even or filling point when between points density, the spacing of filling point is about 0.17mm ± 0.02, the size of filling point diameter can reach the unconspicuous characteristic of vision GTG about 0.04mm ± 0.02 o'clock.Therefore when the filling point of this kind two-dimensional optical identification code is very little, the resolution of above-mentioned 800DPI for example, for human eye, it is equal to be equivalent to GTG.Therefore, this kind coding can accomplish to wait the effect of GTG.Also because this kind coding has the characteristic that waits GTG, so be difficult for causing the interference to vision.That is to say that when this kind coding is used on the printed matter, and the spacing of filling point is greater than 0.19mm, the size of filling point can wherein and not be realized Information hiding that therefore, this kind coding has suitable aesthetic property during less than 0.06mm.Therefore, under identical vision can the ignorance state, filling point of the present invention obviously can carry more coding information.
In addition, the location block of above-mentioned two-dimensional optical identification code has the little characteristics of scope with respect to corresponding data encoded block of location block of existing two-dimensional optical identification code, can realize quickly and easily the location.And this location block is positioned at the centre of whole two-dimensional optical identification code, uses less anchor point just can reach good locating effect, thereby make in the two-dimensional optical identification code more data point can be arranged, and carries more information.Owing to can be out of shape after the actual pattern capture, or there is the problem that consists of similar code pattern to the filling point of data encoding block in the anchor point of location block, and be positioned at the center of block in the data encoding block as the filling point of the reference point of auxiliary positioning, can use less point to realize the effect of good auxiliary positioning, further realize error correction.
It is worth mentioning that, although the two-dimensional optical identification code of constant GTG has been depicted a possible kenel in above-described embodiment, usually know that the knowledgeable should know but have in the affiliated technical field, each manufacturer for size, the positioning area block size of the size of two-dimensional optical identification code, data encoding block, specify the position of pattern and the design of the color inserted can be different, therefore application of the present invention is when being not restricted to the possible kenel of this kind.In other words, so long as the data that store according to wish, the appointment pattern that is used for enrolling data in each data encoding block takes out the appointment pattern that specifies number on the relevant position, and fills up the above-mentioned appointment pattern that is removed, and has been to have met spiritual place of the present invention just.The characteristic of GTG such as also just can reach.
Next, so that having, this area knows usually that the knowledgeable can utilize spirit of the present invention to implement the present invention for the embodiment of a two-dimensional optical identification code again.
Fig. 5 is the code pattern according to the two-dimensional optical identification code shown in another embodiment of the present invention.Please refer to Fig. 5, in this embodiment, this two-dimensional optical identification code comprises location block 201 and 8 data encoded block 202～209 equally.This 8 data encoded block 202～209 are configured to the nine grids kenel equally with location block 201, wherein locate block 201 be positioned at nine grids in the middle of the place, be used for allowing the optical pickup device of wanting to read this two-dimensional optical identification code can distinguish direction when reading.Therefore, in this location block 201, the point that for example left hand edge and coboundary are adjacent is filled, yet, difference according to design, because the location block is used for determining the uniqueness of direction and definite pattern, therefore technical field has and knows that usually it is other combinations that the knowledgeable also can will locate the point that block is designed to be filled according to its effect under, as being the right hand edge point adjacent with coboundary, the perhaps adjacent point of right hand edge and lower limb, perhaps the adjacent point of left hand edge and lower limb also can be the point adjacent with other row and columns, the combination that the scope that is preferably is little and pattern is unique.In addition, that fills up counts also not necessarily 9, does not repeat them here.In addition, the central point of data encoding block 202～209 is filled respectively in order to the reference point as auxiliary positioning.By the location distance between two points of block and each hollow dots of data encoding block geometric position with respect to the location block, can estimate the data point position, yet because meeting deformation after the actual pattern capture so the central point of data encoding block need to be filled up, is used for auxiliary positioning.Same, affiliated technical field have usually know the knowledgeable also can be with the data encoding block design point that is filled not necessarily only have the center a bit, 9 points in the middle of for example can filling up are not so the present invention is as limit.
Fig. 6 a is the code pattern of location block 201 of the two-dimensional optical identification code of Fig. 5.With reference to figure 6a, because location block 201 has been filled 9 points (also being circular hollow dots), therefore, just remaining 16 points, the binary code that can represent 16 4 bits, respectively 0000,0001,0010,0011,0100,0101,0110,0111,1000,1001,1010,1011,1100,1101,1110 and 1111, what this point of the determining positions of point represented is the binary code of which 4 bit, and position and the corresponding relation between the data of point can have multiple setting.Next, Fig. 7 is a code pattern of the data encoding block 202～209 in the two-dimensional optical identification code of Fig. 5.With reference to figure 7, in this embodiment, except reference point, remaining counting is 24, therefore can further be divided into three sub-block.First sub-block comprises 8 points in the upper left corner; Second sub-block comprises 8 points in the lower right corner; The 3rd sub-block comprises 4 points in the upper right corner and 4 points in the lower left corner.8 points in the same block represent respectively the binary code of 83 bits, respectively 000,001,010,011,100,101,110 and 111, what this point of the determining positions of point represented is the binary code of which 3 bit, and the corresponding relation between point and position and the data can arrange respectively at each block.In this embodiment, each data encoding block 202～209 will be filled 3 points as data point except the reference point of auxiliary positioning, so altogether has 4 points in each data encoding block 202～209 and be filled, and it can represent 2
9Individual different numerical value.Fig. 6 b is the another kind of code pattern of the location block among Fig. 6 a, so long as any row is filled with an appointment pattern that is listed as arbitrarily the asymmetric shape that consists of, all can and distinguish read direction in order to the realization location.
Fig. 8 is another code pattern of data encoding block 202～209 of the two-dimensional optical identification code of Fig. 5.With reference to figure 8, in this embodiment, data encoding block 202～209 is except the reference point of auxiliary positioning, and remaining counting is similarly 24 points, but is divided into six sub-block.First sub-block comprises 4 points in the upper left corner; Second sub-block comprises 4 points in the lower left corner; The 3rd sub-block comprises 4 points in the upper right corner; The 4th sub-block comprises 4 points in the lower right corner; The 5th sub-block comprises 4 points on the intermediate vertical line; 4 points in the middle of the 6th sub-block comprises on the horizontal line.4 points in each sub-block represent respectively the binary code of 42 bits, namely 00,01,10 and 11, this some expression of the determining positions of point be the binary code of which 2 bit.In this embodiment, each data encoding block 202～209 also can be filled 6 points as data point except the reference point of auxiliary positioning, so altogether has 7 points in each data encoding block 202～209 and be filled, and can represent 2
12Individual different numerical value.
Therefore, a data encoded block can on average be divided into a plurality of sub-block, and each sub-block comprises 2
nIndividual appointment pattern for the carrying data, the data that can enroll n bit, wherein n be positive integer such as 2,3,4....., the value of n is influential to the filling point density of coded graphics of formation.
Fig. 9 is the code pattern of the data encoding block of an other embodiment two-dimensional optical identification code.With reference to figure 9, in this embodiment, because 9 points have been filled out by central authorities, 9 points are namely arranged as the reference point of auxiliary positioning, so each data encoding block 202～209 remaining counting is 16 points.So in this embodiment, remaining point can represent the binary code of 16 4 bits, is respectively 0000,0001,0010,0011,0100,0101,0110,0111,1000,1001,1010,1011,1100,1101,1110 and 1111.And in this embodiment, each data encoding block 202～209 altogether has 10 points and is filled as data point.Therefore, each data encoding block 202～209 can be in order to represent 2
4(16) individual different numerical value.
Although enumerated 5 * 5 data encoding block and the coded system of location block in above-described embodiment, but have in the affiliated technical field and usually know the knowledgeable, after the above embodiments of the present invention, should know that 4 * 4 or 6 * 6 can reach effect of the present invention equally, even N * M equally also can reach effect of the present invention.So the present invention should not be limited with above-mentioned several embodiment.In addition, in above-described embodiment, although be for example with hollow round dot and solid round dot, under have in the technical field and usually know the knowledgeable, after the above embodiments of the present invention, should be known in both vice versas to implement the present invention.In addition, change circle into other shape, such as triangle, square, oval, rectangle, regular pentagon or sexangle etc. can reach effect of the present invention equally, and therefore, application of the present invention is when being not restricted to the possible kenel of this kind.
Usually know that in order to allow this area have the knowledgeable can realize the coded system of N * M, other for an embodiment at this.Figure 10 is the code pattern according to the two-dimensional optical identification code of 2 * 3 shown in the another embodiment.Please refer to Figure 10, in this embodiment, location block 701 and each data encoding block 702～709 comprise 2 * 3 points.In the present embodiment, the left hand edge point adjacent with coboundary is filled in the block 701 of location, and residue is counted and is not used.Two points in the centre of each data encoding block 702～709 are filled, and as the reference point of auxiliary positioning, remaining 4 points in order to represent the binary code of 2 bits, are respectively 00,01,10 and 11 respectively.Therefore, the two-dimensional optical identification code that consists of of this group coding block data that can enroll 16 bits.The same with above embodiment, the coded sequence of each data encoding block can set up on their own.
This area has knows that usually the knowledgeable can find out by above-described embodiment, even two-dimensional optical identification code is non-square, can utilize spirit of the present invention equally, carries out the coding of two-dimensional optical identification code, and the effect of GTG such as can reach equally.So the present invention is not limited with foursquare coding kenel.
In addition, although above-described embodiment all is configured to the nine grids form with data encoding block and location block, usually knowing that the knowledgeable should can expect by above-mentioned fact Example but this area has, can be other balanced configuration with location block and data encoding block arrangement also.Such as configuration 2 layer data encoded block outside a location block, internal layer has 8, and skin has 16, and the code pattern of location block and data encoding block can adopt the form of Fig. 4 or Fig. 5.
By above-mentioned several embodiment, can summarize a kind of coding method of two-dimensional optical identification code, Figure 11 is the process flow diagram according to the coding method of this two-dimensional optical identification code.Please refer to Figure 11, the method comprises the following steps:
Step S110, one location block is provided and a plurality of data encoding blocks are provided simultaneously, with above-mentioned data encoding block arrangement around the block of above-mentioned location, simultaneously, at each data encoding block, a plurality of appointment patterns are provided, and these specify pattern to be arranged in the array of N * M in the data encoding block;
The for example configuration of the nine grids shown in the embodiment of above-mentioned Fig. 4 and Fig. 5.In the block of location, a plurality of appointment patterns are provided, wherein those specify pattern to be arranged in the array of N * M, and wherein, N, M are natural number.The round dot shown in the embodiment of above-mentioned Fig. 4 and Fig. 5 for example.
Step S111, in the block of location, appointment pattern that will be adjacent with its first edge and the appointment pattern adjacent with its second edge fill up.In each data encoding block, at least one appointment pattern of position in central authorities filled up;
Step S112 according to the data that a wish stores, the remaining appointment pattern, takes out an appointment pattern that specifies number, and fills up the above-mentioned appointment pattern that is removed in each data encoding block;
For example the data encoding block of Fig. 4 is removed 1 point that is used for the carrying data, in order to represent the data of 3 bits; The data encoding block of Fig. 5 can adopt the design of Fig. 7 to be removed 3 points that are used for the carrying data, in order to enroll the data of totally 9 bits, 512 different numerical value can be arranged; As shown in Figure 8, also can take out from the data encoding block of Fig. 56 points that are used for the carrying data, in order to enroll the data of totally 12 bits, can have 2
12(4096) individual different numerical value.
Step S113, according to the data that above-mentioned institute wish stores, remaining appointment pattern for the carrying data takes out the appointment pattern that another specifies number, and fills up the above-mentioned appointment pattern that is removed in the block of location.
In the above-described embodiments, remaining appointment pattern for the carrying data in the block of location, it is optional taking out another appointment pattern that specifies number.Affiliated technical field has knows that usually the knowledgeable should be known in that block main function in location is to allow optical pickup device can distinguish that the direction that reads is designed in order to be used for.Therefore, whether the location block is used for coded data, is the selection in the design.Therefore the coding method of two-dimensional optical identification code of the present invention is not as limit.
Based on above design, the coding method of another two-dimensional optical identification code that provides comprises:
At least one appointment pattern that is positioned at the center that also is useful on auxiliary positioning in each data encoding block is filled.
The code pattern of location block is not limited to and is arranged in N * M array, and is not necessarily identical with the arrangement mode of data encoding block.Also be not limited to simultaneously the filling mode that the appointment pattern with two vertical neighboring edges fills up, but can adopt any row and the filling mode that an appointment pattern that is listed as arbitrarily the asymmetric shape of formation is filled, comprise the location block adopts in the prior art other various arrangements and filling modes.
Appointment pattern in each block can be arranged in N * M array, the better M that equals of N.In above-described embodiment, N=M=3 or N=M=5, the appointment pattern that is used for auxiliary positioning this moment in the data encoding block is preferably 1 appointment pattern of center.The number of the appointment pattern that each sub-block comprises is better to be equated, can be 2,3 or 4 etc., but also can be different.
In the block of location, better the appointment pattern adjacent with two orthogonal edges filled, as fills up dark color, can fill by adjacent whole appointment patterns during filling, also can specify pattern by filling part, as every limit fill continuous 3 reach more than.
At another embodiment, also can be with the circular array that is arranged as in each the data encoding block in the JiuGongTu, this circular array comprise be positioned at the center as a reference point one specify pattern, with take this reference point as circular 4 or 8 appointment patterns as data point that are evenly distributed on the circumference.The location block still adopts the form of N * M array.The mode of encoding in specifying pattern is the same with above-described embodiment.This scheme also can be carried more quantity of information when the vision that the minimizing coded graphics causes is disturbed.
The appointment pattern that is used for carrying data, auxiliary positioning or location can be identical, but also can be different, its shape can be circle, rectangle and other polygons etc., perhaps, also can be figure identical shaped but that vary in size, also can debate according to the difference of location pattern like this and know anchor point and reference point.Except the appointment pattern that is filled, other specify pattern might not need to show, and are all the more so when being printed onto two-dimensional optical identification code on the carrier especially.When realizing encoding with calculation procedure in this way, only need to preserve hereof these and specify position and the shape data of pattern to get final product.
The code pattern of above-mentioned nine grids form also can be deformed into to locate other code patterns with symmetrical structure centered by the block.In addition, although in the present embodiment, number and the position of the appointment pattern that comprises in the number of the sub-block that each data encoding block comprises and position, each sub-block, and the binary code that the appointment pattern of same position represents is all identical.But one or more difference can be arranged in other embodiments, this does not affect reaching of the object of the invention yet.
If binary data to be encoded figure place when compiling certain sub-block is not enough, can fills and set character so that the data of remainder are enrolled this sub-block.As also having this moment some sub-block or data encoding block not to use, can continue fills character encodes, and also can finish coding.
In this step, if remaining appointment pattern for the carrying data is arranged in the block of location, can encode according to the mode similar to the data encoding block, namely be divided into the individual sub-block for coding of L '.The individual sub-block of l ' comprises
Individual appointment pattern for the carrying data, each specifies pattern to represent different k
L 'The binary code of bit enrolls k
L 'During the data of individual bit, the binary code of expression is equaled this k
L 'One of the data of individual bit are specified pattern to fill and are got final product L ', k
L 'Be natural number, l '=1,2 ... L.
Step 3 after code pattern is finished the filling for the appointment pattern that carries data, has namely obtained the coded graphics of the two-dimensional optical identification code behind the coding according to binary data to be encoded.
Afterwards, the coded graphics of the two-dimensional optical identification code behind one or more codings can be printed onto the surface of printed matter, namely can obtain being concealed with the printed article of information coding, and the two-dimensional optical identification code on this printed article is little to the interference of vision, has the visually effect of constant GTG.
In addition, also comprise in actual applications the system that the printed matter that is printed with above-mentioned two-dimensional optical identification code coded graphics is identified, see also Figure 12, be the synoptic diagram of the recognition system based on two-dimensional optical identification code of the present invention, comprise the printed matter 910 that is printed with two-dimensional signal and the recognition device 920 of two-dimensional optical identification code.In other embodiments, this printed matter also can be the object that the two-dimensional optical identification code coded graphics is arranged on other surfaces.
Described printed matter 910 comprises the two-dimensional optical identification code layer 912 of a plurality of two-dimensional optical identification code coded graphicss and comprises the marker layer 914 of one or more marker figures.Described two-dimensional optical identification code layer 912 adopts the infrared absorption ink printing to form, described marker layer 914 adopts the infrared transmission ink printing to form, so that the printing information of marker figure does not affect reflection of light and absorption, the coded graphics of described two-dimensional optical identification code with corresponding marker graphics overlay and with this marker graphics package with which, this marker is associated with the coded message that this coded graphics comprises, and this marker figure can be a kind of or combination in any in image, literal and the symbol etc.
Described two-dimensional optical identification code recognition device 920 comprises optical pickup device 921, treating apparatus 922 and output unit 923.Wherein, connect in wired or wireless mode between optical pickup device 921, treating apparatus 922 and the output unit 923.
Described optical pickup device comprises optical module, optical sensor and infrared light emission device, described infrared light emission device irradiation printed matter 910, described optical module filters the infrared light of this printed matter reflection, take guarantee to be sent to optical sensor only as infrared light, because two-dimensional optical identification code layer 912 adopts the infrared absorption ink printing to form, and described marker layer 914 adopts the infrared transmission ink printing to form, therefore, described inductor receives the infrared light through 912 reflection of two-dimensional optical identification code layer, and produces a corresponding code pattern information of amplifying.Described optical sensor for example can adopt the CMOS inductor.
Described treating apparatus 922, the image that is used for the coded graphics of reception optical sensor generation, identify the title, numbering of the coded message of enrolling this coded graphics such as marker etc., and can be further obtain the relevant audio frequency of the related information of marker such as this marker, video etc. according to this coded message; At last, output unit 923 shows output or voice output etc. with predetermined form output coding information and/or related information such as LCD.
Code pattern according to two-dimensional optical identification code in the previous embodiment, treating apparatus at first detects the location block with location pattern, according to 2 spacing, the position that the geometric position of data encoding block relative positioning block in nine grids directly estimates the data point that may be filled in the image in the block of location, according to the data point that is filled that searches at these estimated positions, determine which data point in the code pattern is filled.
In addition, because to being out of shape after the coded graphics capture, and the data encoding block also might consist of and the similar coded graphics of location pattern, and the reference point that is used for auxiliary positioning that is positioned at the center when the location in the usage data encoded block further realizes error correction.Particularly, after treating apparatus detects the location pattern, whether the position that first estimates each reference point according to 2 spacing in the block of location and the geometric position of data encoding block relative positioning block in nine grids searches reference point according to the position of this each reference point that estimates and judges whether this location pattern that detects is error code.After the location block is determined, estimate again the position of the data point that may be filled around this reference point in the image according to the geometric position of data point relative reference point in 2 spacing in this location block and the code pattern, the data point that is filled that searches according to these estimated positions, determine which data point in the code pattern is filled, and then can obtain corresponding binary code, the binary code that each data point is corresponding combines by coded sequence and namely obtains enrolling data in this code pattern.
Described recognition device 920 can be an optical identification pen.
In sum, spirit of the present invention is to be to provide the location block and around this data encoding block of locating block, will to locate the configuration of block and data encoding block formation nine grids, also can be configured to other about the configuration of location block symmetry.The appointment pattern of the array of N * M is provided in the data encoding block respectively.Because all or part of appointment pattern of two neighboring edges of location block is filled, so the optical identification device can be determined the direction that reads.Because in the data encoding block, except the appointment pattern at center, the appointment pattern that all the other only specify number can be filled, therefore, when coding of the present invention is used on the printed article, as long as coding of the present invention is enough little, just can accomplish the visually effect of constant GTG.That is to say that the information coding that the present invention can hide institute's wish is on printed article.
The specific embodiment that proposes in the detailed description of preferred embodiment is only in order to convenient explanation technology contents of the present invention, but not with narrow sense of the present invention be limited to above-described embodiment, in the situation that does not exceed spirit of the present invention and following claim, the many variations of doing is implemented, and all belongs to scope of the present invention.Therefore protection scope of the present invention is as the criterion when looking accompanying claim.
Claims (7)
1. the recognition system of a two-dimensional optical identification code comprises:
Printed matter, be printed on a plurality of two-dimensional optical identification codes on the described printed matter, the corresponding coded graphics of each two-dimensional optical identification code, each coded graphics comprises location block and an a plurality of data encoding block, and those data encoding block arrangement are around this location block, in this location block, a plurality of appointment patterns are provided, wherein those specify pattern to be arranged in the array of N * M, in each of those data encoding blocks, a plurality of appointment patterns also are provided, and wherein a plurality of appointment patterns in each data encoding block are arranged in the array of N * M; In this location block, one any row is filled with an appointment pattern that is listed as arbitrarily the asymmetric shape that consists of, week is to distinguish read direction, in those data encoding blocks, the position is filled at least one appointment pattern of central authorities, is used for auxiliary positioning, remaining appointment pattern in each those data encoding block is filled up to represent respectively a binary code by selectivity, wherein, N, M are natural number
And the two-dimensional optical identification code recognition device, this recognition device comprises: optical pickup device, treating apparatus and output unit, wherein:
Described optical pickup device is for the image that obtains a plurality of coded graphicss of two-dimensional optical identification code on the printed matter;
Described treating apparatus, be used for receiving the image of described coded graphics, the position relationship of a plurality of appointment patterns that are filled in the image according to described coded graphics, determine wherein for the appointment pattern of distinguishing read direction and auxiliary positioning, and then the appointment pattern of determining wherein to be used for the carrying data identifies the coded message that comprises in this coded graphics in the position of coded graphics;
Described output unit is used for the predetermined described coded message of formal output.
2. recognition system as claimed in claim 1, wherein, N equals M and equals 3, and in those data encoding blocks, except the central appointment pattern that is filled, specify pattern respectively in order to represent the binary code of three bits, be respectively 000,001,010,011,100,101,110 and 111 for remaining 8; In this location block, totally 5 appointment patterns of the appointment pattern on two arbitrary neighborhood limits is filled, and remaining 4 binary codes of specifying patterns not use or be respectively applied to represent two bits are respectively 00,01,10 and 11.
3. recognition system as claimed in claim 1, wherein, N equals M and equals 5; And in those data encoding blocks, except the central appointment pattern that is filled, specify pattern to be divided into respectively 6 sub-block for remaining 24, specify pattern respectively in order to represent the binary code of two bits, be respectively 00,01,10 and 11 for 4 of each sub-block; Perhaps, in those data encoding blocks, except the central appointment pattern that is filled, specify pattern to be divided into respectively 3 sub-block for remaining 24, specify pattern respectively in order to represent the binary code of three bits, be respectively 000,001,010,011,100,101,110 and 111 for 8 of each sub-block.
4. such as claim 1 or 3 described recognition systems, wherein N equals M and equals 5, and in this location block, the appointment pattern on two arbitrary neighborhood limits totally 9 specify patterns to be filled, specify patterns not use or in order to represent respectively the binary code of four bits for remaining 16: 0000,0001,0010,0011,0100,0101,0110,0111,1000,1001,1010,1011,1100,1101,1110 and 1111.
5. such as claim 1,2 or 3 described recognition systems, wherein the number of those data encoding blocks has 8, and those data encoding blocks and this location block formation nine grids.
6. such as claim 1,2 or 3 described recognition systems, wherein, corresponding marker graphics overlay and with this marker graphics package with which on the coded graphics of described two-dimensional optical identification code and the printed matter.
7. such as claim 1,2 or 3 described recognition systems, wherein, on described printed matter surface, the coded graphics of described two-dimensional optical identification code is positioned at and adopts on the two-dimensional optical identification code layer that the infrared absorption ink printing forms, described printed matter surface also is printed with the marker figure, and described marker figure is positioned at and adopts on the marker layer that the infrared transmission ink printing forms.
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| CN 200910158529 CN101615259B (en) | 2008-08-01 | 2009-07-10 | Method for coding two-dimensional optical identification code, identification system and printed product thereof |
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| CN200810131306 | 2008-08-01 | ||
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| CN 200910158529 CN101615259B (en) | 2008-08-01 | 2009-07-10 | Method for coding two-dimensional optical identification code, identification system and printed product thereof |
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| JP4948577B2 (en) | 2012-06-06 |
| JP2010061650A (en) | 2010-03-18 |
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