CN102289653A - Method for increasing identification rate of optical identifier and optical identifier - Google Patents
Method for increasing identification rate of optical identifier and optical identifier Download PDFInfo
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- CN102289653A CN102289653A CN 201110251403 CN201110251403A CN102289653A CN 102289653 A CN102289653 A CN 102289653A CN 201110251403 CN201110251403 CN 201110251403 CN 201110251403 A CN201110251403 A CN 201110251403A CN 102289653 A CN102289653 A CN 102289653A
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Abstract
To increase identification rates of optical identifiers, such as bar codes, the invention provides a method for increasing the identification rate of an optical identifier and an optical identifier. The method comprises the following steps of: generating a standard optical identifier according to information; when the number of modules included in a module set (B or D) is more than the given multiple of the number of modules included in another module set (A or C) at adjacent at least one side, determining an optical identifier module set to be modified as the module set (B or D) and/or the other module set (A or C); and determining a graph of the optical identifier module set to be modified, wherein the graph is used for increasing the identification rate of the optical identifier; preferably, the graph for modifying the module set comprises modifying the size and/or the shape thereof. According to the method and the optical identifier disclosed by the invention, the image distortion resulted from light diffraction or lens distortion is compensated in the optical identifier; and the imaged optical identifier image is closer to the standard optical identifier, therefore, the identification rate of the optical identifier is increased.
Description
Technical field
The present invention relates to the optics sign, relate in particular to the discrimination that improves the optics sign.
Background technology
The optics sign is a kind of figure of beared information, and it uses different module groups to come expression information according to the optical module group of determining and the corresponding relation of information.This optics sign can be read by equipment, the analyzed optical module group that it comprises, and, decode its loaded information by corresponding relation based on this optical module group and information.
For example, bar code is exactly a kind of widely used optics sign.Plane sign indicating number (no matter bar code or two-dimension code) is to come record data or information with black and white or color graphics that certain specific geometric figure module distributes according to certain rules in the plane; On coding, utilize " 0 ", the notion of " 1 " bit stream that constitutes the computer-internal logical foundations dexterously, use several and the corresponding geometrical body of scale-of-two to represent the literal numerical information, handle automatically with realization information by image input device or photoelectric scanning device automatically identifying and reading.
Recognition technology commonly used has light pen, CCD, infrared and laser etc.And which kind of recognition technology no matter, its ultimate principle is all the same: light source shines on the bar code, the reflected light of bar code through optical system imaging to photoelectric commutator, after the electric signal decoding that photoelectric commutator is converted to, output bar code recognition result.The method of raising bar-code identification rate commonly used concentrates on each link of recognition principle: as selecting light source, change ordinary light source into infrared light supply, even select LASER Light Source to reduce because the discrimination that optical diffraction causes descends; Perhaps optimize optical system, differ little as employing, the transmittance height, the lens group that the depth of field is darker makes that the bar code in distant view and the close shot can both be discerned; Perhaps improve resolution of identification equipment or the like.
Summary of the invention
As seen, in the method for existing raising optics sign discrimination, the raising of discrimination all is based upon and improves recognition system itself, and this need increase very big cost.Find a kind of cost that neither increases identification equipment, the discrimination that can improve the optics sign again is a key of the present invention.
The applicant finds through the research back, under many circumstances, cause one of low reason of discrimination to be: certain type optical module group and adjacent in the optics sign in the optical module group of another kind of type, and this optical module group of certain type is obviously less than normal than the optical module group of this another kind type.And the optics identification image that recognition system obtains what can be subjected to diffraction of light or lens distortion influences, this influence makes that this optical module group of certain type " is flooded ", so makes recognition failures, and then causes discrimination low.
In order to address this problem, technical conceive of the present invention is, when generating the optics sign, can be according to the distribution situation of optical module group in the optics sign, figure to some optical module groups is revised, be about to the optics sign because the picture distortion that produces in the optical imagery process that diffraction of light or lens distortion bring compensates in optics sign product, for example increase aforementioned certain type the optical module group size and/or reduce the size of the optical module group adjacent with this optical module group, perhaps change its shape.Like this, can identify by the optics that optical imagery optics identification image resulting, that be subjected to diffraction or distortion effects more is near the mark so that optics identifies, thereby improve the discrimination that this optics identifies.Particularly, in this method,, generate the optics sign of standard according to described information; The number of modules that comprises when a kind of module group is during greater than the given multiple of the number of modules of the another kind of module group of its adjacent at least one side, and need determining the optics identification module group revised is this kind module group and/or should the another kind second module group; Determine to revise the described figure that needs the optics identification module group of correction, be used to improve the discrimination of this optics sign.
According to an aspect of the present invention, provide a kind of method that improves optics sign discrimination, wherein, this optics sign is staggered along assigned direction by the different first module group of two groups of reflectivity and the second module group and forms, and this method comprises the steps:
I. according to described information, generate the optics sign of standard, the size of each module group all is the integral multiple of identification module in the optics sign of described standard;
Ii. when following arbitrary situation takes place, in described normalized optical sign, find out the optics identification module group that needs correction:
A) first number of modules that comprises of the first module group is greater than the given multiple of second number of modules of the second module group of its adjacent at least one side;
B) second number of modules that comprises of the second module group is greater than the given multiple of first number of modules of the first module group of its adjacent at least one side;
The described optics identification module group that needs to revise is described first module group and/or the described second module group;
Iii. determine to revise the described figure that needs the optics identification module group of correction, be used to improve the discrimination of this optics sign.
According to this aspect of the invention, optics is identified owing to compensate on the figure of the module of the picture distortion that produces in the optical imagery process that diffraction of light or lens distortion bring in optics sign product, make the optics sign owing to the optics that optical imagery optics identification image resulting, that be subjected to diffraction or distortion effects more is near the mark identifies, thereby improve the discrimination of this optics sign.
According to one preferred embodiment, described step I ii comprises:
X. determine to revise the described size that needs the optics identification module group of correction, wherein,
To a) situation, reduce the described first module group first size in the direction and/or increase the described second module group, second size;
To b) situation, reduce the described second module group first size in the direction and/or increase the described first module group, second size.
The advantage of this aspect is, for adjacent, less a kind of optical module group and bigger another kind of optical module group, increase the size of less optical module group and/or reduce the size of bigger optical module group, the picture distortion that produces in the optical imagery process that diffraction of light or lens distortion are brought compensates in the optics sign.Make the optics sign owing to the optics that optical imagery optics identification image resulting, that be subjected to diffraction or distortion effects more is near the mark identifies, thereby improve the discrimination of this optics sign.
According to this aspect another preferred embodiment, described step I ii comprises:
Y. by necessarily regular, determine to revise the described shape that needs the optics identification module group of correction.
This preferred embodiment, further by revising the shape of optics identification module group, the picture distortion that produces in the optical imagery process that diffraction of light or lens distortion are brought compensates in the optics sign.Make the optics sign owing to the optics that optical imagery optics identification image resulting, that be subjected to diffraction or distortion effects more is near the mark identifies, thereby improve the discrimination of this optics sign.
According to this aspect another preferred embodiment, described given multiple is not less than 2 times.This has preferred embodiment provided the big module group that is fit to revise and than the multiple size of little module group.
According to this aspect another preferred embodiment, described first size and/or second is of a size of 1% to 30% of identification module size.This has preferred embodiment provided the size of revising size more specifically.
According to of the present invention one preferred embodiment, described step x comprises:
-to a) situation, determine described first size and/or described second size greater than the actual multiple of described second number of modules according to described first number of modules;
-to b) situation, determine described first size and/or described second size according to described second number of modules greater than the actual multiple of described first number of modules;
Described step y comprises:
-to a) situation, determine the shape of described correction greater than the actual multiple of described second number of modules according to described first number of modules;
-to b) situation, determine the shape of described correction greater than the actual multiple of described first number of modules according to described second number of modules.
This advantage preferred embodiment is, revises and decides according to actual multiple, for example if multiple more then carries out more correction, therefore can avoid revising deficiency or overcorrect so that revise more accurately, guarantees discrimination.
According to of the present invention another preferred embodiment, described step I ii comprises:
-determine the actual operating position of this optics sign;
-according to described actual operating position,, determine the described first size and/or second size based on predetermined criterion.
This advantage preferred embodiment is that concrete correction is relevant with the actual operating position of this optics sign, like this can be so that revise more accurate when reality is used.
According to a further preferred embodiment, described predetermined criterion is determined by following method:
-based on described actual operating position normalized optical is discerned;
-based on recognition result, at least one the first module group in this normalized optical sign and/or the size and dimension of the second module group are revised, and regenerate this optics sign based on revised size and dimension, and repeat identification, revise and regenerate step, satisfy predetermined condition until discrimination;
-record is for the correction of the size and dimension of this first module group and/or the second module group, as described first and second predetermined criterion.
This embodiment has provided a kind of method of determining the correction relevant with actual conditions.
According to one preferred embodiment, described actual operating position comprise following at least each:
The size that this optics sign is generated;
This optics identifies the light source of residing environment;
The distance that this optics sign is identified;
Discern this optics and identify employed optical system.
This embodiment has provided several concrete actual operating positions.
According to one preferred embodiment, described optics sign comprises that one-dimensional bar code, described direction are the direction vertical with the bar code bearing of trend; Or
Described optics sign comprises that two-dimension code, described direction are the vertical direction and the horizontal direction of two-dimension code.
In this embodiment, one dimension or two-dimensional bar code can be revised based on the present invention, have therefore improved the discrimination of bar code.
Preferred embodiment the correction of the described first module group and/or the second module group be can be used in improves this optics and be identified at discrimination under the stable condition according to one, a described stable condition comprise following at least each:
Focusing is inaccurate;
At a distance;
The identification equipment low resolution;
Light source is a multi-wavelength;
The illumination low environment.
This embodiment has provided embodiments of the present invention can use the low problem of optics sign discrimination under several typical mal-conditions that solves.
Correspondingly, according to a second aspect of the invention, provide a kind of optics sign, this sign is staggered along assigned direction by the different first module group of two groups of reflectivity and the second module group and forms, and it is characterized in that:
When following arbitrary at least situation satisfies:
A) first number of modules that comprises of the first module group is greater than the given multiple of second number of modules of the second module group of its adjacent at least one side;
B) second number of modules that comprises of the second module group is greater than the given multiple of first number of modules of the first module group of its adjacent at least one side;
The figure of described first module group and/or the described second module group is different with the figure of the identification module group of standard.
This embodiment provides the product of the optics sign with high discrimination.
Other aspects and advantages of the present invention will be described below, perhaps the explanation by hereinafter and being understood by those skilled in the art.
Description of drawings
Fig. 1 is the one-dimensional bar code of an example of unmodified;
Fig. 2 is the corresponding bar code of the one-dimensional bar code with among Fig. 1 through the embodiments of the present invention correction;
Fig. 3 is the two-dimension code of an example of unmodified;
Fig. 4 is the corresponding two-dimension code of the two-dimension code with among Fig. 3 through the embodiments of the present invention correction.
In the accompanying drawing, same or analogous Reference numeral is represented same or analogous step block group or parts (module) module group.
Embodiment
Below with reference among Fig. 1 to 4, the embodiment of one-dimensional bar code and two-dimension code being revised according to the present invention is described in detail.Be appreciated that the present invention is not limited to bar code, any optics sign revised and can be used in.
In first embodiment,, the application of the present invention in one-dimensional bar code is described referring to figs. 1 through 2.
In an example, shown in the numeral of bar code bottom among Fig. 1, need be numeral 693461310001 by the bar code loaded information.
In a first step, according to information 693461310001, generate the bar code of the standard corresponding with this information.Concrete, the method that generates this bar code is consistent with existing barcode encoding method.The bar code of the standard that generates is a bar code as shown in Figure 1, be staggered forms this bar code in horizontal (promptly vertical with bar code bearing of trend direction) with the second module group by the first module group, and each size black, informal voucher sign indicating number module all is the integral multiple of the bar code module of standard in the bar code of this standard.Wherein, one first module group refers to one section continuous black bar code module, and one second module group refers to one section continuous white bar code module.
It should be noted that, in a first step, this standard bar code can only be produced electronically, for example be produced as digital signal black, informal voucher sign indicating number module correspondence, perhaps be produced as the digital signal of bar code image, this signal is stored in the storer, and needn't be printed practically or print.
In second step, in this standard bar code, search for, search for and aforesaidly may be subjected to diffraction of light or less a kind of optical module group that lens distortion influenced, adjacent and bigger another kind of optical module group.
Particularly, search for the given multiple of the width of the first module group greater than the width of its second adjacent module group, this given multiple for example is not less than 2 times.This can be realized greater than the given multiple of the bar code module number of the second module group by the bar code module number of the search first module group.In one embodiment, that standard bar code is generated as is black, the digital signal of informal voucher sign indicating number correspondence, for example logical value 0 corresponding black bar code, logical value 1 corresponding white bar code, then the number multiple relation between logical value 0 that present embodiment can be more continuous and the adjacent continuous logical value 1.For example, in Fig. 1, the quantity that can search bar code module among the first module group B is 4 times of quantity of bar code module among the second module group A.In another embodiment, standard bar code is generated as the digital signal of bar code image, then can use image processing techniques to analyze the width multiple of black bar code image and adjacent white bar code image.For example in Fig. 1, the width that can analyze the image that obtains the first module group B is 4 times of width of the image of white bar code modules A group.
Then, needing the bar code module group of correction is the second module group A or the first module group B or A and B.
In the 3rd step, present embodiment is determined the horizontal increase second module group A first size along bar code, or reduces the first module group B, second size, or increases the second module group A first size and reduce the first module group B, second size simultaneously.
Preferably, consistent for the width that guarantees whole bar code with the width of standard bar code, can adopt the third mode: promptly increase the second module group A first size simultaneously and reduce the first module group B, second size simultaneously.Under a kind of situation, the first size and second size equate, can guarantee that like this width of whole bar code is still consistent with the whole bar code width of standard; Under the another kind of situation, first size also can be unequal with second size.
Preferably, first size and/or second be of a size of standard the bar code module size 1% to 30%.
Preferably, in one case, present embodiment is determined the first size and/or second size according to the quantity of the bar code module of the first module group B actual multiple greater than the bar code module of the second module group A.For example, actual multiple is big more, and then the first size and/or second size also should be big more; And when actual multiple was also little, the first size and/or second size can be less, thereby only carry out trickle correction, by coming that like this diffraction or lens distortion are carried out suitable correction.Corresponding relation between actual multiple and first size/second size can obtain more excellent result through overtesting in advance, and stores for using.
In another case, particularly need to print in large quantity under the situation of same bar code, can determine the first size and/or second size that it is special at the actual operating position of this bar code.Particularly, at first, this standard bar code can be printed out practically.And,, this standard bar code is discerned based on the actual operating position of this bar code.Then, based on recognition result, the size of the second module group A in this standard bar code and/or the first module group B is revised, the repetitive generation of laying equal stress on, identification and correction step satisfy predetermined condition until discrimination.Then, record is for the correction of the size of this second module group A and/or the first module group B, respectively as the first size and/or second size.
Aforesaid actual operating position comprise following at least each:
The size that this bar code is generated;
This bar code will be identified the light source of residing environment;
The distance that this bar code will be identified;
Will discern the employed optical system of this bar code.
This step can automatically be finished by a system, for example this system at first prints this bar code by intended size, and regulating light source and this bar code, will to be identified residing actual light source consistent, discerns then, revises, the system of duplicating of laying equal stress on, identification and correction step.
Fig. 2 has provided the second module group A and has obtained bar code module group A ' and the first module group B and subtract the one-dimensional bar code that narrow second size obtains bar code module group B ' through widening first size.For the ease of watching, the correction size in the accompanying drawing may be exaggerative to some extent, but this can't change technical scheme of the present invention itself.
The correction of the second module group A and/or the first module group B be can be used in improves the discrimination of this bar code under a stable condition, a stable condition here comprise following at least each:
Focusing is inaccurate;
At a distance;
The identification equipment low resolution;
Light source is a multi-wavelength;
The illumination low environment.
Similarly, as shown in Figure 1, the white second module group D is wide more a lot of than the first module group C of its adjacent black, therefore, the low problem of discrimination also might occur.So, this embodiment can also to C and/size of D revises.Concrete implementation is similarly, repeats no more here.Fig. 2 gives the first module group C and obtains bar code module group C ' and the second module group D and subtract the one-dimensional bar code that narrow second size obtains bar code module group D ' through widening first size.
More than be applied to one-dimensional bar code with the present invention embodiment the present invention is described in detail, the embodiment that again the present invention is applied to two-dimension code describes below.
Fig. 3 shows the example of a standard two-dimension code that is generated.
Wherein, the second module group A of white is surrounded by the first module group B of the black of both sides in laterally (horizontal direction in orientation shown in Fig. 3), and module number all is three times of module number of the second module group A among the first module group B.Then present embodiment can determine that the module group that needs to revise is the first module group B of the second module group A and/or its both sides.Then, present embodiment determines along laterally increasing the second module group A, second size of white, and/or reduces at least one first size in the first module group B group of two black of its both sides.Preferably, the overall dimensions of the first module group A of the overall dimensions of the second module group A through revising and the first module group B through revising and standard and the second module group B is identical.As shown in Figure 4, Bai Se the first module group A is broadened in the horizontal and is A '.The first module group B of its both sides black is subtracted the narrow B ' that is respectively.
In addition, among Fig. 3, the downside of the second module group C of black on vertically (vertical direction in orientation shown in Fig. 3) is adjacent with the first module group D of white, and wherein, the module number of the first module group D of white is 5 times of module number among the second module group C of black.Then, present embodiment is determined along the horizontal second module group C of increase, second size, and/or is reduced by the first module group D first size.Preferably, the overall dimensions of the second module group C of the overall dimensions of the second module group C through revising and the first module group D through revising and standard and the first module group D is identical.As shown in Figure 4, the second module group C is C ' from the downside lengthening in the vertical, and the first module group D is shortened to D ' from upside in the vertical.
Revise dimensionally similarly with above, present embodiment can also be to the shape of the modification region of the described first size and the second size correspondence, promptly the shape of the first module group and/or the second module group is revised, be arc for example, shown in the first module group D ' among Fig. 4 with its edge modifications.The shape that is appreciated that this correction can be the arbitrary shape that helps improving discrimination.For the ease of watching, the correction size in the accompanying drawing may be exaggerative to some extent, but this can't change technical scheme of the present invention itself.
Correspondingly, the present invention also provides the optics sign shown in Fig. 2 for example and the bar code shown in Figure 4, and this sign is staggered along assigned direction by the different first module group of reflectivity and the second module group and forms, and it is characterized in that:
When following arbitrary at least situation satisfies:
C) first number of modules that comprises of the first module group (B ') is greater than the given multiple of second number of modules of the second module group of its adjacent at least one side (A ');
D) second number of modules that comprises of the second module group (D ') is greater than the given multiple of first number of modules of the first module group of its adjacent at least one side (C ');
The figure of described first module group and/or the described second module group is different with the figure of the identification module group of standard, is used to improve the discrimination of this optics sign.
Preferably, the size of described first module group and/or the described second module group is different with the size of the identification module group of standard:
To a) situation, the described in the direction first module group (B ') is than the little first size of size of first several identification modules of module, and/or the described second module group (A ') is than big second size of size of second several identification modules of module;
To b) situation, the described in the direction second module group (D ') is than the little first size of size of second several identification modules of module, and/or the described first module group (C ') is than big second size of size of first several identification modules of module;
A more concrete example of this embodiment can not repeat them here with reference to Fig. 1-Fig. 4 and above related description to Fig. 1-Fig. 4.
The shape of described first module group and/or the described second module group is different with the shape of the identification module group of standard.
A more concrete example of this embodiment can not repeat them here with reference to Fig. 3-Fig. 4 and above related description to Fig. 3-Fig. 4.
Preferably, described given multiple is not less than 2 times.
Preferably, described first size and/or second is of a size of 1% to 30% of identification module size.
Preferably, to a) situation, described first and/or second size is relevant greater than the actual multiple of described second number of modules with described first number of modules, and the shape of described first module group and/or the described second module group is relevant greater than the actual multiple of described second number of modules with described first number of modules;
To b) situation, described first and/or second size is relevant greater than the actual multiple of described first number of modules with described second number of modules, and the shape of described first module group and/or the described second module group is relevant greater than the actual multiple of described first number of modules with described second number of modules.
Preferably, the described first size and/or second size are relevant with the actual operating position of this optics sign, and the shape of described first module group and/or the described second module group is relevant with the actual operating position of this optics sign, described actual operating position comprise following at least each:
The size that this optics sign is generated;
This optics identifies the light source of residing environment;
The distance that this optics sign is identified;
Discern this optics and identify employed optical system.
Preferably, described optics sign comprises that one-dimensional bar code, described direction are the direction vertical with the bar code bearing of trend; Or
Described optics sign comprises that two-dimension code, described direction are the horizontal and vertical of two-dimension code;
Described first module group and/or the figure described second module group, different with the module group of standard can be used in and improve this optics and be identified at discrimination under the stable condition, a described stable condition comprise following at least each:
Focusing is inaccurate;
At a distance;
The identification equipment low resolution;
Light source is a multi-wavelength;
The illumination low environment.
The more concrete example of above embodiment can not repeat them here with reference to Fig. 1-Fig. 4 and above related description to Fig. 1-Fig. 4.
In the above embodiment, only having black, white two kinds of modules with one dimension sign indicating number and two-dimension code is that example is described embodiments of the present invention.Be appreciated that the present invention is not limited to this, and go for the optics that color the constituted sign of other any kind and quantity.And, be appreciated that the present invention is not limited to the size and dimension of the module group of optics sign is revised, and can be to any attribute relevant with its figure, for example various attributes such as color, reflecting rate are revised, to reach purpose of the present invention.
Although sets forth in detail and described the present invention in accompanying drawing and aforesaid description should think that this is illustrated and describes is illustrative and exemplary, rather than restrictive; The invention is not restricted to above-mentioned embodiment.The picture distortion that produces in the optical imagery process that the present invention also is not limited to bring at diffraction of light or lens distortion.The claimed optics sign of the present invention product comprises the optics sign product by method manufacturing of the present invention, also comprises with optics other any way manufacturings, that fall within the optics sign claim to a product scope identifying product.
The those skilled in the art in those present technique fields can be by research instructions, disclosed content and accompanying drawing and appending claims, and understanding and enforcement are to other changes of the embodiment of disclosure.In the claims, word " comprises " element and the step of not getting rid of other, and wording " one " is not got rid of plural number.Any Reference numeral in the claim should not be construed as the restriction to scope.
Claims (16)
1. method that improves optics sign discrimination, wherein, this optics sign is staggered along assigned direction by the different first module group of reflectivity and the second module group and forms, and this method comprises the steps:
I. according to described information, generate the optics sign of standard;
Ii. when following arbitrary situation takes place, in described normalized optical sign, find out the optics identification module group that needs correction:
A) first number of modules that comprises of the first module group (B) is greater than the given multiple of second number of modules of the second module group (A) of its adjacent at least one side;
B) second number of modules that comprises of the second module group (D) is greater than the given multiple of first number of modules of the first module group (C) of its adjacent at least one side;
The described optics identification module group that needs to revise is described first module group and/or the described second module group;
Iii. determine to revise the described figure that needs the optics identification module group of correction, be used to improve the discrimination of this optics sign.
2. method according to claim 1 is characterized in that, described step I ii comprises following arbitrary at least step:
X. determine to revise the described size that needs the optics identification module group of correction, wherein:
To a) situation, reduce described first module group (B) first size in the direction and/or increase the described second module group (A), second size
To b) situation, reduce described second module group (D) first size in the direction and/or increase the described first module group (C), second size;
Y. determine to revise the described shape that needs the optics identification module group of correction.
3. method according to claim 1 is characterized in that, described given multiple is not less than 2 times.
4. method according to claim 2 is characterized in that, described first size and/or second is of a size of 1% to 30% of standard module size.
5. method according to claim 2 is characterized in that, described step x comprises:
-to a) situation, determine described first size and/or described second size greater than the actual multiple of described second number of modules according to described first number of modules;
-to b) situation, determine described first size and/or described second size according to described second number of modules greater than the actual multiple of described first number of modules;
Described step y comprises:
-to a) situation, determine the shape of described correction greater than the actual multiple of described second number of modules according to described first number of modules;
-to b) situation, determine the shape of described correction greater than the actual multiple of described first number of modules according to described second number of modules.
6. method according to claim 2 is characterized in that, described step x comprises:
-determine the actual operating position of this optics sign;
-according to described actual operating position,, determine the described first size and/or second size based on first predetermined criterion;
Described step y comprises:
-determine the actual operating position of this optics sign;
-according to described actual operating position,, determine the shape of described correction based on second predetermined criterion.
7. method according to claim 6 is characterized in that, described first and second predetermined criterion are determined by following method:
-based on described actual operating position normalized optical is discerned;
-based on recognition result, at least one the first module group in this normalized optical sign and/or the size and dimension of the second module group are revised, and regenerate this optics sign based on revised size and dimension, and repeat identification, revise and regenerate step, satisfy predetermined condition until discrimination;
-record is for the correction of the size and dimension of this first module group and/or the second module group, as described first and second predetermined criterion.
8. according to claim 6 or 7 described methods, it is characterized in that, described actual operating position comprise following at least each:
The size that this optics sign is generated;
This optics identifies the light source of residing environment;
The distance that this optics sign is identified;
Discern this optics and identify employed optical system.
9. optics sign according to claim 1 is characterized in that, described optics sign comprises that one-dimensional bar code, described direction are the direction vertical with the bar code bearing of trend; Or
Described optics sign comprises that two-dimension code, described direction are the horizontal and vertical of two-dimension code;
The correction of the described first module group and/or the second module group be can be used in improves this optics and be identified at discrimination under the stable condition, a described stable condition comprise following at least each:
Focusing is inaccurate;
At a distance;
The identification equipment low resolution;
Light source is a multi-wavelength;
The illumination low environment.
10. optics sign, this sign are staggered along assigned direction by the different first module group of reflectivity and the second module group and form, and it is characterized in that:
When following arbitrary at least situation satisfies:
A) first number of modules that comprises of the first module group (B ') is greater than the given multiple of second number of modules of the second module group of its adjacent at least one side (A ');
B) second number of modules that comprises of the second module group (D ') is greater than the given multiple of first number of modules of the first module group of its adjacent at least one side (C ');
The figure of described first module group and/or the described second module group is different with the figure of the identification module group of standard, is used to improve the discrimination of this optics sign.
11. optics sign according to claim 10 is characterized in that the size of described first module group and/or the described second module group is different with the size of the identification module group of standard:
To a) situation, the described in the direction first module group (B ') is than the little first size of size of first several identification modules of module, and/or the described second module group (A ') is than big second size of size of second several identification modules of module;
To b) situation, the described in the direction second module group (D ') is than the little first size of size of second several identification modules of module, and/or the described first module group (C ') is than big second size of size of first several identification modules of module;
And/or,
The shape of described first module group and/or the described second module group is different with the shape of the identification module group of standard.
12. optics sign according to claim 10 is characterized in that described given multiple is not less than 2 times.
13. optics sign according to claim 11 is characterized in that described first size and/or second is of a size of 1% to 30% of identification module size.
14. optics sign according to claim 11 is characterized in that,
To a) situation, described first and/or second size is relevant greater than the actual multiple of described second number of modules with described first number of modules, and the shape of described first module group and/or the described second module group is relevant greater than the actual multiple of described second number of modules with described first number of modules;
To b) situation, described first and/or second size is relevant greater than the actual multiple of described first number of modules with described second number of modules, and the shape of described first module group and/or the described second module group is relevant greater than the actual multiple of described first number of modules with described second number of modules.
15. optics sign according to claim 11, it is characterized in that, the described first size and/or second size are relevant with the actual operating position of this optics sign, and the shape of described first module group and/or the described second module group is relevant with the actual operating position of this optics sign, described actual operating position comprise following at least each:
The size that this optics sign is generated;
This optics identifies the light source of residing environment;
The distance that this optics sign is identified;
Discern this optics and identify employed optical system.
16. optics sign according to claim 10 is characterized in that, described optics sign comprises that one-dimensional bar code, described direction are the direction vertical with the bar code bearing of trend; Or
Described optics sign comprises that two-dimension code, described direction are the horizontal and vertical of two-dimension code; And,
The figure of described first module group and/or the described second module group can be used in and improves this optics and be identified at discrimination under the stable condition, a described stable condition comprise following at least each:
Focusing is inaccurate;
At a distance;
The identification equipment low resolution;
Light source is a multi-wavelength;
The illumination low environment.
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