CN110264860A - A kind of multispectral image camouflage method based on multimembrane system array - Google Patents
A kind of multispectral image camouflage method based on multimembrane system array Download PDFInfo
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- CN110264860A CN110264860A CN201910514637.5A CN201910514637A CN110264860A CN 110264860 A CN110264860 A CN 110264860A CN 201910514637 A CN201910514637 A CN 201910514637A CN 110264860 A CN110264860 A CN 110264860A
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- image
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- image information
- method based
- system array
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
- G09F3/02—Forms or constructions
- G09F3/0291—Labels or tickets undergoing a change under particular conditions, e.g. heat, radiation, passage of time
- G09F3/0294—Labels or tickets undergoing a change under particular conditions, e.g. heat, radiation, passage of time where the change is not permanent, e.g. labels only readable under a special light, temperature indicating labels and the like
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/20—Filters
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
- G09F3/02—Forms or constructions
- G09F2003/0257—Multilayer
Abstract
The invention discloses a kind of multispectral image camouflage methods based on multimembrane system array, and in particular to technical field is hidden and read to image information.The present invention can carry out multiple image on same surface using film stacking structure difference and add up, utilize the notch filter characteristic of assembly of thin films, spectrum is encoded, it realizes in same code plane, more image concealings, increase encryption information capacity, in membrane system stacking process, the film layer in a cycle is used‑‑Plated film is carried out, when cut-off central wavelength is arbitraryWhen, the corresponding period is n.When image shows, when being irradiated using corresponding wavelength light source, the film layer constituted in the corresponding points of image information on print is zero to the nearly rate of incident light transmission, and reflectivity is very high, therefore the observation of light transmission exemplar can see that the image information of corresponding wavelength.
Description
Technical field
Technical field is hidden and read the present invention relates to image information, and in particular to a kind of based on the multispectral of multimembrane system array
Section image camouflage method.
Background technique
With advances in technology with the increasingly complexity of update and working environment, technology is hidden and read to image information
Technical requirements are continuously improved.Optical encryption technology has high resolution, and no multipath effect, good concealment, light weight is small in size
The advantages that.
In the prior art, " the Hiding multi-level multi-color images in delivered in December, 2016
Terahertz metasurfaces " it refers in a text using resonant structure array, using its structure difference, thus conductivity
Different characteristics keeps the RESONANCE ABSORPTION depth in lens different, so that pictorial information be presented with Terahertz frequency.But since it is super
Surface texture and image information correspond, therefore multiple image can not be presented on same surface.What in December, 2017 delivered
It is straight that linearly polarized light is used in " High-resolution grayscal image hidden in a laser beam " text
One group of linear polarization device corresponding with image content of irradiation is connect, is believed with every corresponding intensity of reflected light difference image is presented
Breath, but equally exist and a width picture can only be hidden, the few problem of information content.
Summary of the invention
The purpose of the present invention is in view of the above deficiencies, propose a kind of multispectral image camouflage side based on multimembrane system array
Method encodes spectrum, realizes more image concealings in same code plane, increases the narrowband square hole of encryption information capacity
Notch filter piece.
The present invention specifically adopts the following technical scheme that
A kind of multispectral image camouflage method based on multimembrane system array, including assembly of thin films, the assembly of thin films is in stacking process
In, the film layer in a cycle uses--Plated film is carried out, when cut-off central wavelength isWhen, the corresponding period
For n；When being superimposed plated film on same pixel, in the film layer of same pixel plating different-thickness d, realize in same pixel pair
Different central wavelength traps, to change trap central wavelength.
Preferably, filter plate is encoded.
Preferably, during being encoded to the optical filter, densifying plate is encoded, selection cuts cardiac wave in system
It is a length ofPoint, is added respective wavelength filter plate between light source and densifying plate, and the position of densifying plate is to select according to figure demand
Plating film location, there is trap phenomenon for constituting graphical content and show image information under respective wavelength.
Preferably, during being encoded to the optical filter, due to when white light source is to densifying plate direct irradiation
When, the combination pattern that multiple image is superimposed jointly is seen through densifying plate, can not read image information at this time.
Preferably, when image shows, when irradiating using corresponding wavelength light source, the correspondence of image information is constituted on print
Film layer on point is zero to the nearly rate of incident light transmission, and reflectivity is very high, therefore the observation of light transmission exemplar can see that corresponding wavelength
Image information.
The invention has the following beneficial effects:
During being encoded to optical filter, densifying plate is encoded, select cut central wavelength processed forPoint, by
Respective wavelength filter plate is added between light source and densifying plate, the densifying plate plating film location that figure demand selects in photograph and picture is used
There is trap phenomenon and show the image information under respective wavelength using corresponding wavelength when image shows to constitute image content
When light source irradiates, the film layer constituted in the corresponding points of image information on print is zero to the nearly rate of incident light transmission, and is reflected
Rate is very high, therefore the observation of light transmission exemplar can see that the image information of corresponding wavelength, by utilizing film stacking structure difference can be same
It is cumulative that one surface carries out multiple image.
Detailed description of the invention
Fig. 1 is filtering trap schematic diagram；
Fig. 2 is the notch figure under red light irradiation；
Fig. 3 is the notch figure under green light irradiation；
Fig. 4 is the notch figure under blue light illumination；
Fig. 5 is the notch film layer sectional view in red light wavelength one longitudinal period；
Fig. 6 is the notch film layer sectional view in green wavelength one longitudinal period；
Fig. 7 is the notch film layer sectional view in blue light wavelength one longitudinal period；
Fig. 8 is light source through the light intensity curve after feux rouges filter plate；
Fig. 9 is light source through the light intensity curve after green light filter plate；
Figure 10 is light source through the light intensity curve after blue light filter plate；
Figure 11 is the notch figure under red blue light illumination；
Figure 12 is the notch figure under blue green light irradiation；
Figure 13 is the notch figure under red-green glow irradiation；
Figure 14 is the notch figure under the irradiation of red blue green three coloured light；
Figure 15 is the notch film layer sectional view in red blue light wavelength one longitudinal period；
Figure 16 is the notch film layer sectional view in bluish-green optical wavelength one longitudinal period；
Figure 17 is the notch film layer sectional view in red-green glow wavelength one longitudinal period；
Figure 18 is the notch film layer sectional view of red blue green three coloured light wavelength；
Figure 19 is light source through the light intensity curve after blue green light filter plate；
Figure 20 is light source through the light intensity curve after blue green light filter plate；
Figure 21 is light source through the light intensity curve after red-green glow filter plate；
Figure 22 is light source through the light intensity curve after red blue green three coloured light filter plate；
Figure 23 is exemplar plated film schematic diagram.
Specific embodiment
A specific embodiment of the invention is described further in the following with reference to the drawings and specific embodiments:
As shown in Figure 1, a kind of multispectral image camouflage method based on multimembrane system array, including assembly of thin films, the multilayer film
It ties up in stacking process, the film layer in a cycle uses--Plated film is carried out, when cut-off central wavelength is
When, the corresponding period is n；When it is multiple for ending central wavelength, i.e. cut-off central wavelength is respectively,,When, it respectively corresponds
Three width image informations such as Fig. 2, Fig. 3, Fig. 4；When being superimposed plated film on same pixel, different-thickness d is plated in same pixel
Film layer, realize in same pixel to different central wavelength traps, to change trap central wavelength.Such as Fig. 5, Fig. 6, Fig. 7 institute
Show, corresponding wavelength reflection image such as Fig. 8, Fig. 9 and Figure 10；And the membrane system of different cut-off central wavelengths is overlapped mutually not mutually
It mutually influences, shows that image such as Figure 11, Figure 12, Figure 13, Figure 14, every corresponding membrane structure such as Figure 15, Figure 16, Figure 17, Figure 18 are right
Answer wavelength-albedo image such as Figure 19, Figure 20, Figure 21, Figure 22.
Filter plate is encoded, during being encoded to optical filter, densifying plate is encoded, selection cuts system
Central wavelength isPoint, is added respective wavelength filter plate between light source and densifying plate, and the position of densifying plate is to need according to figure
The plating film location of selection is sought, trap phenomenon occur for constituting graphical content shows image information under respective wavelength.To filter
During mating plate is encoded, due to seeing multiple image through densifying plate when white light source is to densifying plate direct irradiation
The combination pattern being superimposed jointly can not read image information at this time.
As shown in figure 23,Corresponding region is trap central wavelengthPixel,Corresponding region is in trap
Cardiac wave is longPixel,Corresponding region is that trap central wavelength isPixel,、Corresponding region is trap
Central wavelength is respectively、,, corresponding region be trap central wavelength be respectively、, when white light, due to white
Light includes all wavelengths coloured light, if transmitting information isWavelength content has then hidden the image information under specific wavelength at this time.
When image shows, when being irradiated using corresponding wavelength light source, on print in the corresponding points of composition image information
Film layer is zero to the nearly rate of incident light transmission, and reflectivity is very high, therefore the observation of light transmission exemplar can see that the image of corresponding wavelength
Information.
Certainly, the above description is not a limitation of the present invention, and the present invention is also not limited to the example above, this technology neck
The variations, modifications, additions or substitutions that the technical staff in domain is made within the essential scope of the present invention also should belong to of the invention
Protection scope.
Claims (5)
1. a kind of multispectral image camouflage method based on multimembrane system array, is characterized in that comprising assembly of thin films, the multilayer film
It ties up in stacking process, the film layer in a cycle uses--Plated film is carried out, when cut-off central wavelength is
When, the corresponding period is n；When being superimposed plated film on same pixel, in the film layer of same pixel plating different-thickness d, realize
Same pixel is to different central wavelength traps, to change trap central wavelength.
2. a kind of multispectral image camouflage method based on multimembrane system array as described in claim 1, which is characterized in that filter
Wave plate is encoded.
3. a kind of multispectral image camouflage method based on multimembrane system array as claimed in claim 2, which is characterized in that right
During the optical filter is encoded, densifying plate is encoded, select cut central wavelength processed forPoint in light source and adds
Respective wavelength filter plate is added between close plate, the position of densifying plate is the plating film location selected according to figure demand, for constituting
There is trap phenomenon and shows image information under respective wavelength in graphical content.
4. a kind of multispectral image camouflage method based on multimembrane system array as claimed in claim 3, which is characterized in that right
During the optical filter is encoded, due to being seen through densifying plate more when white light source is to densifying plate direct irradiation
The combination pattern that width image is superimposed jointly can not read image information at this time.
5. a kind of multispectral image camouflage method based on multimembrane system array as claimed in claim 3, which is characterized in that scheming
As when irradiating using corresponding wavelength light source, the film layer in the corresponding points of image information is constituted on print to incident light when showing
Transmiting nearly rate is zero, and reflectivity is very high, therefore the observation of light transmission exemplar can see that the image information of corresponding wavelength.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111951662A (en) * | 2020-06-03 | 2020-11-17 | 中山大学 | Physical information hiding structure based on size difference of structural units and preparation method thereof |
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