CN110086956A - A kind of halftoning hidden image relief effect shows hidden method - Google Patents
A kind of halftoning hidden image relief effect shows hidden method Download PDFInfo
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- CN110086956A CN110086956A CN201910424352.2A CN201910424352A CN110086956A CN 110086956 A CN110086956 A CN 110086956A CN 201910424352 A CN201910424352 A CN 201910424352A CN 110086956 A CN110086956 A CN 110086956A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M3/00—Printing processes to produce particular kinds of printed work, e.g. patterns
- B41M3/14—Security printing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/40—Picture signal circuits
- H04N1/405—Halftoning, i.e. converting the picture signal of a continuous-tone original into a corresponding signal showing only two levels
- H04N1/4051—Halftoning, i.e. converting the picture signal of a continuous-tone original into a corresponding signal showing only two levels producing a dispersed dots halftone pattern, the dots having substantially the same size
- H04N1/4052—Halftoning, i.e. converting the picture signal of a continuous-tone original into a corresponding signal showing only two levels producing a dispersed dots halftone pattern, the dots having substantially the same size by error diffusion, i.e. transferring the binarising error to neighbouring dot decisions
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/40—Picture signal circuits
- H04N1/405—Halftoning, i.e. converting the picture signal of a continuous-tone original into a corresponding signal showing only two levels
- H04N1/4055—Halftoning, i.e. converting the picture signal of a continuous-tone original into a corresponding signal showing only two levels producing a clustered dots or a size modulated halftone pattern
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- Engineering & Computer Science (AREA)
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Abstract
What the present invention disclosed a kind of halftoning hidden image relief effect shows hidden method, hiding information is added in different location in printing three color versions of image, production simultaneously shows hidden grating tools with the combination that three color versions match, hidden grating tools will be shown to be covered on the four-color image containing hiding information, can show the relief display effect of hidden image；It is comprehensive to carry out Information hiding in different color versions, it is not easy to be copied by criminal, hiding information is during display; the relief effect for realizing hiding information, reaches unique display effect, plays difficult imitated purpose; the antiforge function of printing image is enhanced, the purpose of protection printing packaging product is played.
Description
Technical field
The invention belongs to the half tone image anti-counterfeiting technologies of printed matter, and in particular to a kind of halftoning hidden image relief effect
Fruit shows hidden method.
Background technique
During press is evolving, the technologies such as high-precision scanning, duplication also emerge one after another, these technologies give press band
Also to provide illegal business opportunity for the production of fake and inferior commodities while convenience.The behaviors such as bootlegging, the forgery of product are tight
Business and consumer's equity has been invaded again.Common printed matter anti-counterfeiting technology be concentrated mainly on material is anti-fake, ink is anti-fake, printing
Technique is anti-fake, halftoning hidden image is anti-fake etc..Wherein half tone image concealing technology does not change printing enterprise as one kind
Industry prior art, the mode for not increasing product extra cost are paid close attention to by enterprise and industry.The half tone image of traditional sense is anti-
Pseudo- technology generally using image procossing before printing excessively in, hiding graph text information is hidden into some printing color version, object is utilized
The physical and chemical display for showing hidden tool (optics is shown) and realizing hiding information.The effect of hiding information in order to further increase simultaneously,
Also there is " it is anti-fake that subchannel splices sub-image ", " multi-angle ", the display of the hiding information of " multiple information ".These effects are certain
Half tone image anti-fake method and theory are enriched in degree.
Summary of the invention
Hidden method is shown it is an object of that present invention to provide a kind of halftoning hidden image relief effect, hiding information is with protrusion
Effect is shown, reaches unique display effect, is not easy to be copied by criminal, enhances the antifalse effect of printed matter image information.
To achieve the above object, the technical solution adopted by the present invention is that:
A kind of halftoning hidden image relief effect shows hidden method, comprising the following steps:
Step 1, bottom layer image of the piece image as Information hiding, and Fill Color are created；
Step 2, the bottom layer image made in step 1 is separated into four chrominance channels, forms four color versions, and respectively to four colors
Version screening；
Step 3, it selects piece image or text as hiding information, removes background layer, and be translated into grayscale image
Picture；
Step 4, complete in step 2 green version (C) in four color versions of halftoning, pinkish red version (M), in black print (K) simultaneously
It is embedded in hiding information, and to hiding information part to deviating；
Step 5, merge four color color versions, complete hiding for information；
Step 6, the display light to match with three the green version (C) in step 4, pinkish red version (M), black print (K) color versions is made
Grid layer merges these three grating layers, after removing background, as the combination grating layer for showing hiding information progress relief；
Step 7, combination grating layer made of step 6 is overlapped on four color hidden images after merging in steps of 5
Show hiding information.
Further, the bottom layer image size in the step 1 is (1-30) cm × (1-30) cm, resolution ratio 500-
2400dpi, color mode are CMYK mode, and background colour is white.
Further, in the step 1 when Fill Color, the Fill Color value of each color version is between 20-80%.
It further, is under pattern bitmap, using circular shaped lattice point to four colors to four color version screenings in the step 2
Version carries out screening, and the screen angle of green black (CMYK) four color versions of product Huang selects 18.4 ° respectively, and 71.6 °, 0 °, 45 °, screening line
Number is between 150lpi-175lpi.
Further, the size of hiding information is (2-5) cm × (2-5) cm in the step 3.
Further, the insertion hiding information in the step 4 is the hiding information layer difference that will be completed in step 3
Copy to green version (C), pinkish red version (M), black print (K) three color versions same position on, later to pinkish red version (M) and black print (K)
Hiding information move to the right, and the offset ranges of hiding information are 0-15 pixel in pinkish red version (M), in black print (K)
The offset ranges of hiding information are 8-30 pixel.
Further, the displacement operation of the step 4 is the constituency chosen in three color versions where hiding information respectively, deletes
Fall the figure layer where it, hiding information be displaced using filter in Photoshop using displacement formula, displacement by
Following equation determines:
Wherein: X, Y are respectively horizontal and vertical displacement, PlFor image lateral resolution, PcFor image longitudinal resolution
Rate, L are screen density, and α is screen angle.
Further, the merging color version in the step 5 is according to blueness-black sequence of product-Huang-in Photoshop to color
Version merges.
Further, the combination grating layer in the step 6 refers to the screen angle, screen frequency, resolution of single layer grating
The anti-fake main color version of rate, color filling rate corresponding thereto is equal, size 5cm × 5cm of grating layer, uses straight line to grating layer
Screening.
The beneficial effects of the present invention are:
Halftoning hidden image relief effect of the present invention shows hidden method, by image processing techniques and printed matter anti-counterfeiting technology
Associated, when carrying out halftone to image, hiding information is added in different location in printing three color versions of image, is made simultaneously
Hidden grating tools are shown with the combination that three color versions match, hidden grating tools will be shown and be covered in the four-color image containing hiding information
On, it can show the relief display effect of hidden image.
It is comprehensive to carry out Information hiding in different color versions, it is not easy to be copied by criminal, hiding information is real during display
The relief effect of existing hiding information enables hiding graph text information to reach unique display effect, play it is unusual, solely
The effect of a flag is set, it is diversified to show hiding anti-counterfeiting information, difficult imitated purpose is played, is conducive to further promote product
Anti-fake effect.
This method does not increase printing cost, is shown in the way of unique to hiding information, enhances printing image
Antiforge function, play protection printing packaging product purpose.
Detailed description of the invention
Fig. 1 is the relief flow for displaying figure of halftoning hidden image of the present invention
Fig. 2 is the figure of hiding information 1
Fig. 3 is the concealment effect figure of hiding information
Fig. 4 is that the relief of hiding information shows figure
Fig. 5 is the figure of hiding information 2
Fig. 6 is the concealment effect figure of hiding information 2
Fig. 7 is that the relief of hiding information 2 shows figure
Specific embodiment
Present invention is further described in detail combined with specific embodiments below, but not as a limitation of the invention.
A kind of halftoning hidden image relief effect of the present invention shows hidden method, and specific flow chart is as shown in Figure 1, specifically press
Implement according to following steps:
Step 1, bottom layer image of the piece image as Information hiding, and Fill Color, detailed process are created are as follows:
New image file in Photoshop: image size is (1-30) cm × (1-30) cm, resolution ratio 500-2400dpi, color
Mode is CMYK mode, and background colour is white；
Step 2, color filling is carried out to new files, Fill Color value is between 20%-80%；
Step 3, the image file made in step 2 is separated into four chrominance channels, forms four color versions, and respectively to four colors
Version screening carries out screening to four color versions using circular shaped lattice point that is, under pattern bitmap, green product Huang black (CMYK) four color versions
Screen angle selects 18.4 ° respectively, and 71.6 °, 0 °, 45 °, screen frequency is between 150lpi-175lpi.
Step 4, select piece image or text as hiding information, size range is (2-5) cm × (2-5) cm,
Remove background layer, and is translated into gray level image；
Step 5, green version (C) in four color versions of halftoning, pinkish red version (M), identical in black print (K) are completed in step 3
Position is embedded in hiding information, i.e., by the hiding information layer to complete in step 3 copy to respectively green version (C), pinkish red version (M),
On the same position of black print (K) three color versions, the hiding information in pinkish red version (M), black print (K) is moved to the right later,
The offset ranges of hiding information are 0-15 pixel in pinkish red version (M), and the offset ranges of hiding information are 8-30 in black print (K)
Pixel；
Step 6, the hiding information in three color versions that position in step 5 is set is chosen, deletes the figure layer where it,
Hiding information is displaced in filter, displacement is determined by following equation:
Wherein: X, Y are respectively horizontal and vertical displacement, PlFor image lateral resolution, PcFor image longitudinal resolution
Rate, L are screen density, and α is screen angle；
Step 7, merge four color color versions, color version is merged according to the sequence of C-M-Y-K in Photoshop, complete
Information is hidden；
Step 8, the display grating to match with three green version (C), pinkish red version (M), black print (K) color version screening parameters is made
Layer, grating tomographic image size are 5cm × 5cm, and the parameter of single layer grating includes screen angle, screen frequency, resolution ratio, dot surface
The anti-fake main color version of product rate corresponding thereto is equal, uses straight line screening to grating layer；
Step 9, the grating layer made in step 8 is subjected to background operation, three grating layers is merged and are known as group light combination
Grid layer；
Step 10, combination grating layer made of step 9 is overlapped on four color hidden images after merging in step 7, i.e.,
It can show the relief effect of hiding information.
Embodiment 1
Step 1, bottom layer image of the piece image as Information hiding, and Fill Color, detailed process are created are as follows:
New image file in Photoshop: image size is 10cm × 10cm, and resolution ratio 2100dpi, color mode is CMYK mould
Formula, background colour are white.
Step 2, color filling is carried out to new files, Fill Color value is set as 30%.
Step 3, the image file made in step 2 is separated into four chrominance channels, forms four color versions, and respectively to four colors
Version screening carries out screening to four color versions using circular shaped lattice point that is, under pattern bitmap, green product Huang black (CMYK) four color versions
Screen angle selects 18.4 ° respectively, and 71.6 °, 0 °, 45 °, screen frequency 175lpi.
Step 4, using Fig. 2 as hiding information 1, remove background layer, and be translated into gray level image；
Step 5, green version (C) in four color versions of halftoning, pinkish red version (M), identical in black print (K) are completed in step 3
Position is embedded in hiding information, i.e., by the hiding information layer to complete in step 3 copy to respectively green version (C), pinkish red version (M),
On the same position of black print (K) three color versions, the hiding information in pinkish red version (M), black print (K) is moved to the right later,
Wherein the offset of hiding information is set as 4 pixels in pinkish red version (M), and the offset of hiding information is set as 10 in black print (K)
Pixel.
Step 6, the hiding information in three color versions that position in step 5 is set is chosen, deletes the figure layer where it,
Hiding information is displaced in filter, displacement is determined by following equation:
Wherein: wherein: Pl=Pc=2100dpi, L=175lpi, α=18.4 ° of green version (C), the α of pinkish red version (M)=
71.6 °, α=45 ° of black print (K), by being calculated: the lateral displacement amount X=2 of hiding information, length travel in green version (C)
Measure Y=6；The lateral displacement amount X=6 of hiding information, length travel amount Y=2 in pinkish red version (M)；The displacement X=of black print (K)
4, length travel amount Y=4.
Step 7, merge four color color versions, color version is merged according to the sequence of C-M-Y-K in Photoshop, complete
Information is hidden, and four colors of hiding information 1 hide figure such as Fig. 3.
Step 8, the display grating to match with three green version (C), pinkish red version (M), black print (K) color version screening parameters is created
Layer, the size of single layer grating are 5cm × 5cm, and resolution ratio 2100dpi, dot area percentage 30%, screening shape is straight line
Shape, screen frequency 175lpi, grating layer screen angle corresponding with green version (C) are 18.4 °；Light corresponding with pinkish red version (M)
Grid screen angle is 71.6 °, and grating layer screen angle corresponding with black print (K) is 45 °.
Step 9, remove the background layer of three single layer gratings, merge and be known as combination grating layer.
Step 10, combination grating layer made of step 9 is overlapped on four color hidden images after merging in step 7, i.e.,
It can show the relief effect of hiding information, display effect such as Fig. 4.
Embodiment 2
Step 1, bottom layer image of the piece image as Information hiding, and Fill Color, detailed process are created are as follows:
New image file in Photoshop: image size is 10cm × 10cm, and resolution ratio 2100dpi, color mode is CMYK mould
Formula, background colour are white.
Step 2, color filling is carried out to new files, Fill Color value is set as 30%.
Step 3, the image file made in step 2 is separated into four chrominance channels, forms four color versions, and respectively to four colors
Version screening carries out screening to four color versions using circular shaped lattice point that is, under pattern bitmap, green product Huang black (CMYK) four color versions
Screen angle selects 18.4 ° respectively, and 71.6 °, 0 °, 45 °, screen frequency 175lpi.
Step 4, using Fig. 5 as hiding information 2, remove background layer, and be translated into gray level image；
Step 5, green version (C) in four color versions of halftoning, pinkish red version (M), identical in black print (K) are completed in step 3
Position is embedded in hiding information, i.e., by the hiding information layer to complete in step 3 copy to respectively green version (C), pinkish red version (M),
On the same position of black print (K) three color versions, the hiding information in pinkish red version (M), black print (K) is moved to the right later,
Wherein the offset of hiding information is set as 15 pixels in pinkish red version (M), and the offset of hiding information is set as 30 in black print (K)
Pixel.
Step 6, the hiding information in three color versions that position in step 5 is set is chosen, deletes the figure layer where it,
Hiding information is displaced in filter, displacement is determined by following equation:
Wherein: wherein: Pl=Pc=2100dpi, L=175lpi, α=18.4 ° of green version (C), the α of pinkish red version (M)=
71.6 °, α=45 ° of black print (K), by being calculated: the lateral displacement amount X=2 of hiding information, length travel in green version (C)
Measure Y=6；The lateral displacement amount X=6 of hiding information, length travel amount Y=2 in pinkish red version (M)；The displacement X=of black print (K)
4, length travel amount Y=4.
Step 7, merge four color color versions, color version is merged according to the sequence of C-M-Y-K in Photoshop, complete
Information is hidden, and four colors of hiding information 2 hide figure such as Fig. 6.
Step 8, the display grating to match with three green version (C), pinkish red version (M), black print (K) color version screening parameters is created
Layer, the size of single layer grating are 5cm × 5cm, and resolution ratio 2100dpi, dot area percentage 30%, screening shape is straight line
Shape, screen frequency 175lpi, grating layer screen angle corresponding with green version (C) are 18.4 °；Light corresponding with pinkish red version (M)
Grid screen angle is 71.6 °, and grating layer screen angle corresponding with black print (K) is 45 °.
Step 9, remove the background layer of three single layer gratings, merge and be known as combination grating layer.
Step 10, combination grating layer made of step 9 is overlapped on four color hidden images after merging in step 7, i.e.,
It can show the relief effect of hiding information 2, display effect such as Fig. 7.
Finally it should be noted that: the above examples are only used to illustrate the technical scheme of the present invention rather than its limitations, to the greatest extent
Pipe is described the invention in detail referring to above-described embodiment, it should be understood by those ordinary skilled in the art that: still may be used
With modifications or equivalent substitutions are made to specific embodiments of the invention, and repaired without departing from any of spirit and scope of the invention
Change or equivalent replacement, should all cover in present claims range.
Claims (9)
1. a kind of halftoning hidden image relief effect shows hidden method, it is characterised in that the following steps are included:
Step 1, bottom layer image of the piece image as Information hiding, and Fill Color are created；
Step 2, the bottom layer image made in step 1 is separated into four chrominance channels, forms four color versions, and add respectively to four color versions
Net；
Step 3, it selects piece image or text as hiding information, removes background layer, and be translated into gray level image；
Step 4, the green version (C) in four color versions of halftoning, pinkish red version (M) are completed in step 2, are embedded in black print (K) simultaneously
Hiding information, and to hiding information part to deviating；
Step 5, merge four color color versions, complete hiding for information；
Step 6, the display grating layer to match with three the green version (C) in step 4, pinkish red version (M), black print (K) color versions is made,
These three grating layers are merged, after removing background, as the combination grating layer for showing hiding information progress relief；
Step 7, combination grating layer made of step 6 is overlapped on four color hidden images after merging in steps of 5, can be shown
Hiding information.
2. halftoning hidden image relief effect according to claim 1 shows hidden method, it is characterised in that: the step
Bottom layer image size in 1 is (1-30) cm × (1-30) cm, and resolution ratio 500-2400dpi, color mode is CMYK mode,
Background colour is white.
3. halftoning hidden image relief effect according to claim 1 shows hidden method, it is characterised in that: the step
In 1 when Fill Color, the Fill Color value of each color version is between 20-80%.
4. halftoning hidden image relief effect according to claim 1 shows hidden method, it is characterised in that: the step
It is screening to be carried out to four color versions using circular shaped lattice point, green product Huang is black under pattern bitmap to four color version screenings in 2
(CMYK) screen angle of four color versions selects 18.4 ° respectively, 71.6 °, 0 °, 45 °, screen frequency be 150lpi-175lpi it
Between.
5. halftoning hidden image relief effect according to claim 1 shows hidden method, it is characterised in that: the step
The size of hiding information is (2-5) cm × (2-5) cm in 3.
6. halftoning hidden image relief effect according to claim 1 shows hidden method, it is characterised in that: the step
Insertion hiding information in 4, be the hiding information layer that will be completed in step 3 copy to respectively green version (C), pinkish red version (M),
On the same position of black print (K) three color versions, the hiding information of pinkish red version (M) and black print (K) is moved to the right later, and
The offset ranges of hiding information are 0-15 pixel in pinkish red version magenta version (M), the offset ranges of hiding information in black print (K)
For 8-30 pixel.
7. halftoning hidden image relief effect according to claim 1 shows hidden method, it is characterised in that: the step
4 displacement operation is the constituency chosen in three color versions where hiding information respectively, deletes the figure layer where it, use displacement
Formula is displaced hiding information using filter in Photoshop, and displacement is determined by following equation:
Wherein: X, Y are respectively horizontal and vertical displacement, PlFor image lateral resolution, PcFor image longitudinal resolution, L is
Screen density, α are screen angle.
8. halftoning hidden image relief effect according to claim 1 shows hidden method, it is characterised in that: the step
Merging color version in 5 is merged according to blueness-black sequence of product-Huang-to color version in Photoshop.
9. halftoning hidden image relief effect according to claim 1 shows hidden method, it is characterised in that: the step
Combination grating layer in 6 refers to the screen angle of single layer grating, screen frequency, resolution ratio, color filling rate corresponding thereto
Anti-fake main color version is equal, size 5cm × 5cm of grating layer, uses straight line screening to grating layer.
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