CN106023281B - Grating developed image preparation method - Google Patents
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- CN106023281B CN106023281B CN201610344008.9A CN201610344008A CN106023281B CN 106023281 B CN106023281 B CN 106023281B CN 201610344008 A CN201610344008 A CN 201610344008A CN 106023281 B CN106023281 B CN 106023281B
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- 238000002360 preparation method Methods 0.000 title claims abstract description 35
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Classifications
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T11/00—2D [Two Dimensional] image generation
- G06T11/20—Drawing from basic elements, e.g. lines or circles
- G06T11/203—Drawing of straight lines or curves
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T1/00—General purpose image data processing
- G06T1/0021—Image watermarking
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Abstract
The present invention provides a kind of grating developed image preparation method, implementing step is, printing master map of the generation with default resolution ratio, length using a pixel under the default resolution ratio is measurement unit, calculate the corresponding length in pixels of grating constant in the next preset matching grating of the resolution ratio, then some parallel and equidistant straightway formation background layer is generated in the printing master map, the hiding information that the matched FBG shows can be used by finally being made in the background layer.The technique of this grating developed image preparation method is simple, has uniqueness and exclusiveness without the hiding information to any processing of matched FBG progress, and in " the decryption region " being fabricated to, does not mix solution mutually with his class decoding tool.With " hiding information " made by this preparation method, directly apply to the intellectual reading matter of juvenile's class and teaching material is taught in auxiliary answer class books, can effectively cultivate the learning interest and reading ability of children, real realize is taught through lively activities.
Description
Technical field
The present invention relates to printing image concealing technology field, in particular to a kind of grating developed image preparation method.
Background technology
Culture children's reading books, the interest of learning knowledge are the most important things of formative education.But it is existing many suitable
Children read books form it is dry as dust, lack novelty and interest, it is difficult to evoke children learning enthusiasm and
Reading interest.For this phenomenon, design with decryption function " decryption area ", and decrypted with decryption card in books,
Think that the learning tape inherently to children comes certain feeling of freshness and infinite enjoyment, it is a kind of more feasible method that can yet be regarded as.
The manufacture craft with image concealing technology domestic at present sets foot in in the anti-counterfeit package field of enterprise product mostly,
And manufacture craft is not smart, make cumbersome, developed image is smudgy, or even cost of manufacture virtual height, and this sampling technology is not fitted
Close in the printing applied to juvenile's class books.
The content of the invention
In view of this, it is an object of the invention to provide a kind of grating developed image preparation method, applied to books printing
In, to cultivate the learning interest of children, good Learning atmosphere is formed, the purpose taught through lively activities is reached.
The grating developed image preparation method that present pre-ferred embodiments are provided, including：Generation is with default resolution ratio
Print master map；Length using a pixel under the default resolution ratio is calculated next pre- in the resolution ratio as measurement unit
If the corresponding length in pixels of the grating constant of matched FBG；Some parallel and equidistant straight line is generated in the printing master map
Section forms background layer, the corresponding length in pixels of the line width picture corresponding with the vertical range that adjacent two straight line is intersegmental of the straightway
Plain length sum is equal to the corresponding length in pixels of the grating constant, wherein, the inclination angle of the straightway relatively horizontal orientation
Spend for 45 degree, and the corresponding length in pixels of width of the straightway is corresponding with the vertical range that adjacent two straight line is intersegmental
The difference of length in pixels is more than or equal to 2 pixels and is less than or equal to 3 pixels, wherein the intersegmental vertical range of adjacent two straight line is corresponding
Length in pixels is more than the corresponding length in pixels of width of the straightway；The matching can be used by being made in the background layer
The hiding information that grating shows, hiding information includes any one or more in word and figure.
Preferably, the printing master map is generated under pattern bitmap.
Preferably, the length of a pixel using under the default resolution ratio is calculated in this point as measurement unit
The step of grating constant of the next preset matching grating of resolution corresponding length in pixels, includes：Calculate under the default resolution ratio
One inch of corresponding length in pixels；According to calculating formulaThe corresponding length in pixels of grating constant of matched FBG is drawn,
Wherein, NpFor one inch of corresponding length in pixels, f is the groove sum in per inch on the preset matching grating, and N is described
The corresponding length in pixels of grating constant.
Preferably, it is described that the step of can using the hiding information that the matched FBG shows is made in the background layer
Including：Under grayscale mode, information to be concealed, the information one new figure of formation to be concealed are imported on the background layer
Layer；Delete the information to be concealed and retain the constituency of the figure layer；Again under pattern bitmap, pass through the figure layer constituency of reservation
The line segment of copy background layer forms another new figure layer, and the new figure layer is moved along the direction of the vertical straightway, it is mobile away from
The vertical range corresponding length in pixels intersegmental less than adjacent two straight line from more than 0.
Preferably, the constituency of the figure layer is more than the straightway along the distance moved perpendicular to the direction of the straightway
The average value of the corresponding length in pixels of line width length in pixels sum corresponding with the vertical range that adjacent two straight line is intersegmental and small
In the intersegmental corresponding length in pixels of vertical range of adjacent two straight line.
Preferably, this method also includes：, will before the constituency of the figure layer is moved in the direction along the vertical straightway
The image model of the printing master map is converted to pattern bitmap from grayscale mode.
Preferably, the resolution ratio of the printing master map is 1200dpi.
Preferably, in the matched FBG per inch groove sum be 80~140 between.
Preferably, methods described also includes：The matched FBG being covered on the printing master map show hiding
During information, the groove on the matched FBG is parallel to the straightway on the background layer.
In the grating developed image preparation method that the present invention is provided, according to the corresponding picture of the grating constant of preset matching grating
Plain length generates some parallel and equidistant straightway in printing master map, forms the Background From Layer in " decryption region ", then
Hiding word or figure is made in Background From Layer.The technique of this preparation method is simple, any without being carried out to matched FBG
Processing, directly can make matched FBG by the vertical range between the width and adjacent two straightway that adjust the straightway
Development effect reach that the hiding information in more visible state, and " the decryption region " being fabricated to has uniqueness and exclusive
Property, i.e., solution is not mixed mutually with his class decoding tool.With " hiding information " made by this preparation method, juvenile is directly applied to
Class intellectual reading matter and teaching material are taught in auxiliary class books, can effectively cultivate the learning interest and reading ability of children, real real
Now teach through lively activities.
Brief description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be attached to what is used required in embodiment
Figure is clearly and succinctly introduced.The following drawings should be understood to illustrate only certain embodiments of the present invention, therefore should not be by
Regard the restriction to scope as, for those of ordinary skill in the art, on the premise of not paying creative work, may be used also
To obtain other related contents according to these accompanying drawings.
Fig. 1 is a kind of flow chart of grating developed image preparation method provided in an embodiment of the present invention；
Fig. 2 is background when application grating developed image preparation method provided in an embodiment of the present invention makes books decryption region
The initial fabrication step schematic diagram of layer；
Fig. 3 is background when application grating developed image preparation method provided in an embodiment of the present invention makes books decryption region
Schematic diagram of the layer when displaying ratio is 200%；
Fig. 4 is the schematic diagram after the background layer shown in Fig. 3 imports information to be concealed；
Fig. 5 is that the schematic diagram behind information to be concealed and reservation figure layer constituency is deleted on the basis of Fig. 4；
Fig. 6 is in " decryption region " that application grating developed image preparation method provided in an embodiment of the present invention completes
Hiding information schematic diagram；
Fig. 7 is provided in an embodiment of the present invention stylish in application grating developed image preparation method making books decryption region
The displacement of figure layer calculates schematic diagram；
Fig. 8 is to be exported after application grating developed image preparation method provided in an embodiment of the present invention makes books decryption region
The film draw a design and decrypt effect diagram.
Embodiment
In order to reach make the purpose of the embodiment of the present invention, make technical scheme and make advantage it is clearer, below in conjunction with
Accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out it is clear, be fully described by.Obviously, retouched
The embodiment stated is a part of embodiment of the invention, rather than whole embodiments.Generally described in accompanying drawing and show here
The component of the embodiment of the present invention gone out can be arranged and designed with a variety of configurations.
It should be noted that：Similar label and letter represents similar terms in following accompanying drawing, therefore, once a certain Xiang Yi
It is defined in individual accompanying drawing, then it further need not be defined and explained in subsequent accompanying drawing.
In the description of the invention, it is necessary to explanation, the side of the instruction such as term " " center ", " on ", " vertical ", " level "
Position or position relationship are, based on orientation shown in the drawings or position relationship, to be for only for ease of the description present invention and simplify description,
Rather than indicate or imply that signified preparation method must have specific orientation, with specific azimuth configuration and operation, therefore
It is not considered as limiting the invention.
Therefore, the detailed description of embodiments of the invention below to providing in the accompanying drawings is not intended to limit claimed
The scope of the present invention, but be merely representative of the present invention selected embodiment.Based on the embodiment in the present invention, this area is common
The every other embodiment that technical staff is obtained under the premise of creative work is not made, belongs to the model that the present invention is protected
Enclose.
Referring to Fig. 1, being the grating developed image preparation method flow chart that present pre-ferred embodiments are provided, it should illustrate
, grating development pattern-producing method of the present invention is not using Fig. 1 and particular order as described below as limitation.Below
Idiographic flow shown in Fig. 3 will be described in detail.
Step S101, printing master map of the generation with default resolution ratio.
In the present embodiment, using graphics software, such as Photoshop, one is generated under pattern bitmap or grayscale mode
Digital document with default resolution ratio (such as 1200dpi), the length and width size of the digital document can be set according to actual needs
Put, be such as set to 6 centimetres of 6 cm x, obtain the printing master map.
Step S102, the length using a pixel under the default resolution ratio is calculated in the resolution as measurement unit
The corresponding length in pixels of grating constant of the next preset matching grating of rate.
Grating constant is the distance between groove of grating two, is commonly called as pitch.Due to making on printing master map " decryption area
During hiding information in domain ", the width of required straightway can not be measured with millimeter, and making purpose is otherwise unable to reach at all,
Therefore need with the measurement unit smaller than millimeter, in the present embodiment, use " pixel ".The known next picture of different resolution
The length of element is different, to calculate the corresponding length in pixels of grating constant under the default resolution ratio, it is necessary first to convert
Go out one inch of corresponding length in pixels under the default resolution ratio, then according to calculating formulaDraw matched FBG
The corresponding length in pixels of grating constant, wherein parameter NpThe length in pixels corresponding to one inch is represented, parameter f represents described pre-
If the groove sum that per inch is included on matched FBG, parameter N represents that the corresponding pixel of the grating constant of the matched FBG is long
Degree.
Step S103, generates some parallel and equidistant straightway formation background layer in the printing master map, described
The corresponding length in pixels of the line width length in pixels sum corresponding with the vertical range that adjacent two straight line is intersegmental of straightway is equal to institute
State the corresponding length in pixels of grating constant.
After the grating constant for calculating the matched FBG, some parallel and equidistant straight line is generated in printing master map
Section forms background layer.Wherein, the corresponding length in pixels of the width of the straightway is N1, between adjacent two straightway it is vertical away from
It is N from corresponding length in pixels2。N1With N2Sum is equal to the corresponding length in pixels of width and adjacent two straight line of N, i.e. straightway
The corresponding length in pixels sum of vertical range between section is equal to the corresponding length in pixels of grating constant of the matched FBG.
Preferably, some straightway relatively horizontal orientations generated have certain angle of inclination, such as 45 degree, and straight line
The difference of the corresponding length in pixels of the corresponding length in pixels of width and the intersegmental vertical range of adjacent two straight line of section more than etc.
It is less than or equal to 3 pixels in 2 pixels, wherein the intersegmental corresponding length in pixels of vertical range of adjacent two straight line is more than the straightway
The corresponding length in pixels of width, i.e. N2With N1Difference be more than or equal to 2 pixels and be less than or equal to 3 pixels, and N2>N1。
Step S104, the hiding information that the matched FBG shows can be used by being made in the background layer, hide letter
Breath includes any one or more in word and figure.
The specific implementation that hiding information to be shown is made in background layer is, under grayscale mode, in the background
Information to be concealed, the information one new figure layer of formation to be concealed are imported in layer；Then the information to be concealed is deleted
And retain the constituency of the figure layer, and the image model of printing master map is converted into pattern bitmap by grayscale mode；Again in bitmap
Under pattern, the true lines of background layer are copied with the figure layer constituency that is retained, new figure layer is formed, and along the side of the vertical straightway
To the mobile new figure layer, mobile distance should be greater than 0 and the vertical range corresponding pixel intersegmental less than adjacent two straight line is long
Degree, i.e., the position that the line segment of new figure layer is moved between the straightway belonging to its original and adjacent straightway.
Preferably, when moving the new figure layer in the direction along the vertical straightway, its last shift position is in
The position of upper middle between straightway belonging to the line segment original of new figure layer and adjacent straightway.Specifically, the new figure
Layer along the distance moved perpendicular to the direction of the straightway be more than the corresponding length in pixels of line width of the straightway with it is adjacent
The average value of the corresponding length in pixels sum of the intersegmental vertical range of two straight lines and less than intersegmental vertical of adjacent two straight line
Apart from corresponding length in pixels, that is, the distance moved should be greater than (N2+N1)/2 and less than N2。
So far, completing for the hiding information on master map in " decryption region " is printed.Made " decryption region " can
Go out the film and draw a design or be printed as book, then the matched FBG is covered in development on " decryption region ".Need explanation
, when development is decrypted in matched FBG, when it is covered on " decryption region ", grating line should be with making " decryption region "
When background layer in straightway it is parallel, optimal decryption effect so could be presented, hiding information could clearly show
Out.For example, when the angle of inclination of shown straightway relatively horizontal orientation is 45 degree, when development is decrypted in matched FBG,
The optimum tilt angle of its groove relatively horizontal orientation is also 45 degree, and now hiding information shows best results.
In addition, in the present embodiment, there is the hiding information in " decryption region " preferably making effect to refer to by described
When development is decrypted in matched FBG, " hiding information " can be high-visible, just looks at less than zebra-stripe (due to grating material pair
The chequered with black and white striped of the diffraction formation of light, is commonly called as zebra-stripe).On one-step print master map is completed in " decryption region "
After the making of hiding information, it can be judged to make effect according to the judgment criteria, if dissatisfied, repeat above-mentioned making step
And inclining for the vertical range between the width of the straightway, adjacent straightway and straightway relatively horizontal orientation is finely tuned accordingly
The parameters such as rake angle are to reach finally satisfied making effect.
The grating developed image preparation method that the present embodiment is provided, which is particularly suitable for use in, makes books decryption region.Will " decryption
Region " is applied in the intellectual reading matter of juvenile's class and teaching material teach auxiliary class books, and small readers can be allowed to experience novelty, then produced
Learning interest, the learning ability of effective lifting child.Just it is specifically described this implementation exemplified by making books decryption region below
The specific implementation for the grating developed image preparation method that example is provided.
When making books decryption region, the resolution ratio of printing master map should be 1200dpi, and preset matching grating should be every English
Groove sum in very little is the column mirror grating between 80~140, and it is 100 that groove sum in per inch is used in this example
Post mirror light is deleted.
It is determined that, it is necessary to calculate in the case where resolution ratio is 1200dpi, matching light after the resolution ratio and matched FBG of printing master map
The corresponding length in pixels of grating constant of grid, specific calculating process is referred to, but is not limited to, and following methods are realized：
After the length of the next pixels of known 1200dpi, using computer scale compare method, draw 1 millimeter with
Conversion formula between the next pixel of the resolution ratio is 1 millimeter of pixel of ≈ 47.Have again, 1 inch=2.54 centimetres=25.4 millimeters,
So obtaining 1 inch=25.4 millimeters pixels of 25.4 × 47 pixel ≈ of ≈ 1193.8.
Afterwards, using calculating formulaDraw the corresponding length in pixels of grating constant of matched FBG, wherein NpAbout
Equal to 1193.8 pixels, f is equal to 100, finally obtains N and be approximately equal to 10.938 pixels, in order to easy to make, N tetra- is given up into five here
The pixel of integer value 11 is obtained after entering, i.e., in per inch the column mirror grating of 100 grooves using a length in pixels under 1200dpi as
During measurement unit, the corresponding length in pixels of its grating constant is 11 pixels.
After the corresponding length in pixels of grating constant for obtaining matched FBG, and then it needs to be determined that the width institute of straightway is right
The corresponding length in pixels of vertical range between the length in pixels answered and adjacent two straightway.Straightway is too thick or carefully can very much
Influence the making effect in " decryption region ", the color lump that line segment will be slightly presented the word or figure that are hidden in " decryption region " very much
Black obfuscation, very unsightly, and line segment is too thin may not to reach the purpose of hidden text or figure again, so choosing proper width
Line segment is particularly significant.Found after repeatedly practice, the width of straightway should be less than the vertical range between adjacent two straightway, and
Poor 2~3 pixel is advisable between the two, and the color lump for the implicit word being so not only imprinted in " the decryption region " on books will not be sent out
Dark hair is dark, and being capable of preferably hidden text or figure.Thus, in this example, the width of the straightway used is 4 picture
Vertical range between element, adjacent two straightway is 7 pixels, and the grating constant that both sums are exactly equal to matched FBG is corresponding
Length in pixels.
Based on above-mentioned preparation, the manufacturing process for the hiding information that will be specifically described below in " decryption region ", such as
Shown in lower：
First, in the graphics software, such as Photoshop, newly-built-pattern-bitmap is performed, one dimensional parameters of generation are
66 centimetres of cm x, resolution ratio is 1200dpi digital document, obtains printing master map.
Secondly, it is that the straightway and width of 4 pixels are the straight line of 7 pixels respectively to draw a width in the printing master map
Section, the angle of inclination of two line segment relatively horizontal orientations is 45 degree, wherein, width is used as interim adjustment for the straightway of 7 pixels
Spacing is used.
Again, in printing master map, copy the width for 4 pixels straightway once, and by image mode transform be
Grayscale mode, image, which is shown, is changed to 300%, and two width of adjustment are the spacing between 4 pixel straightways, make between the two only between
Every a width be 7 pixels straightway, as shown in Figure 2.Then the straightway that the width is 7 pixels is deleted, and it is viscous to copy
The Form generation of patch is some parallel and equidistant width be 4 pixels straightway, be illustrated in figure 3 under 200% displaying ratio
Printing master map in background layer.
Finally, word to be concealed is added in background layer, as shown in figure 4, then choosing word, text to be concealed is deleted
Word simultaneously retains figure layer constituency (dashed region shown in Fig. 5), then utilizes retained figure layer constituency to copy background in background layer
The true lines of layer form new figure layer, and move the new figure layer using the direction of the vertical straightway in arrow edge, send out line segment
Raw dislocation, and the position of upper middle that the lines that are copied of new figure layer should be moved between adjacent two line segment is advisable, and specifically please
Reference picture 6.
For the movement of new figure layer, it can use and first move horizontally after certain distance, then the mode of vertical shift is realized newly
Figure layer relatively straight line segment is vertically moved.Assuming that with d1Represent the distance that moves horizontally of new figure layer, d2Represent the vertical shifting of new figure layer
Dynamic distance, as shown in fig. 7, can obtain：
d1=(x+4) cos α=(x+4) cos (90- β),
d2=(x+4) sin α=(x+4) sin (90- β), wherein β=45 °
Have again：Obtain 1.5<x≤2.
Wherein, this boundary condition of x≤2 allow for new figure layer should be moved to the position of upper middle between two line segments and
Setting.In different embodiments, " upper middle " this position can be limited using different boundary values so that " solution
Hiding information in close region ", which is obtained, preferably makes effect.
After hiding information in " decryption region " completes, the film can be gone out and draw a design or be printed as book, and by matched FBG
(decryption card) is covered on " decryption region " and is decrypted.Matched FBG is drawn a design and covered to the film shown in Fig. 8 for output
The schematic diagram after development is decrypted.
In addition, in order that dull matched FBG piece is more beautiful, the fineness related to books can print in lenticular lenses and is schemed
Case, is made lovely 3D stereotomes, to excite the desire of buying books of small reader.
Especially, it should be noted that, the preparation method of this grating development figure is applicable not only to existing lenticular lenses, also
It can be used in common PVC (polyvinyl chloride) clear plastic articles.Difference is：On common PVC transparent plastic sheet not
There is groove, without calculating the corresponding length in pixels of grating constant, direct secondary identical " pitch " plate of self manufacture two is (foregoing
Background layer), a pair is imprinted on PVC transparent plastic sheet as printed panel, forms a stand-by matched FBG piece, and another pair is then used for
The hiding information in " decryption region " is made, preparation method is the same as those described above, will not be repeated here.
In summary, the technique for the grating developed image preparation method that the present invention is provided is simple, without entering to matched FBG
Any processing of row, can directly be made by the vertical range between the width and adjacent two straightway of finely tuning the straightway
Development effect with grating reaches that the hiding information in more visible state, and " the decryption region " being fabricated to has uniqueness
And exclusiveness, i.e., solution is not mixed mutually with his class decoding tool.Simultaneously can also be by " the decryption region " made by such a preparation method
Interior hiding information, directly applies to the intellectual reading matter of juvenile's class and teaching material is taught in auxiliary answer class books, can effectively cultivate child
Son learning interest and reading ability, real realize teach through lively activities.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.Within the spirit and principles of the invention, that is made any repaiies
Change, equivalent substitution, improvement etc., should be included in the scope of the protection.
Claims (9)
1. a kind of grating developed image preparation method, it is characterised in that methods described includes：
Printing master map of the generation with default resolution ratio；
Length using a pixel under the default resolution ratio is calculated in the next preset matching of the resolution ratio as measurement unit
The corresponding length in pixels of grating constant of grating；
Some parallel and equidistant straightway formation background layer, the line width pair of the straightway are generated in the printing master map
It is corresponding that the length in pixels answered length in pixels sum corresponding with the vertical range that adjacent two straight line is intersegmental is equal to the grating constant
Length in pixels, wherein, the angle of inclination of the straightway relatively horizontal orientation is 45 degree, and the straightway width correspondingly
Length in pixels and the difference of the corresponding length in pixels of the intersegmental vertical range of adjacent two straight line be more than or equal to 2 pixels and be less than etc.
In 3 pixels, wherein the intersegmental corresponding length in pixels of vertical range of adjacent two straight line is more than the width pair of the straightway
The length in pixels answered；
The hiding information that the matched FBG shows can be used by being made in the background layer, and hiding information includes word and figure
Any one or more in shape.
2. grating developed image preparation method according to claim 1, it is characterised in that the printing master map artwork in place
Generated under formula.
3. grating developed image preparation method according to claim 1, it is characterised in that described with the default resolution ratio
Under the length of a pixel be measurement unit, the grating constant calculated in the next preset matching grating of the resolution ratio is corresponding
The step of length in pixels, includes：
Calculate length in pixels corresponding in the default next inch of resolution ratio；
According to calculating formulaThe corresponding length in pixels of grating constant of matched FBG is drawn, wherein, NpIt is right for one inch
The length in pixels answered, f is the groove sum in per inch on the preset matching grating, and N is the corresponding picture of the grating constant
Plain length.
4. grating developed image preparation method according to claim 1, it is characterised in that described to be made in the background layer
The step of making the hiding information that the matched FBG can be used to show includes：
Under grayscale mode, information to be concealed, the information one new figure layer of formation to be concealed are imported on the background layer；
Delete the information to be concealed and retain the constituency of the figure layer；
Again under pattern bitmap, the line segment for copying background layer by the figure layer constituency of reservation forms another new figure layer, and along vertical
The new figure layer is moved in the direction of the straightway, mobile distance be more than 0 be less than adjacent two straight line it is intersegmental it is vertical away from
From corresponding length in pixels.
5. grating developed image preparation method according to claim 4, it is characterised in that the new figure layer is along perpendicular to institute
The distance for stating the direction movement of straightway is intersegmental more than the corresponding length in pixels of line width and adjacent two straight line of the straightway
The average value of the corresponding length in pixels sum of vertical range and the vertical range corresponding picture intersegmental less than adjacent two straight line
Plain length.
6. grating developed image preparation method according to claim 4, it is characterised in that this method also includes：
Before the constituency of the figure layer is moved in the direction along the vertical straightway, by the image model of the printing master map from
Grayscale mode is converted to pattern bitmap.
7. grating developed image preparation method according to claim 1, it is characterised in that the resolution ratio of the printing master map
For 1200dpi.
8. grating developed image preparation method according to claim 7, it is characterised in that in the matched FBG per inch
Groove total value be 80~140 between.
9. grating developed image preparation method according to claim 1, it is characterised in that methods described also includes：
The matched FBG is covered in show hiding information on the printing master map when, the groove on the matched FBG
Parallel to the straightway on the background layer.
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| CN110210471A (en) * | 2019-07-19 | 2019-09-06 | 南京环印防伪科技有限公司 | A kind of image information area location structure and image information area acquisition methods for image rectification |
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