CN108694717A - The method of the authenticity and expressive force of the hidden image decrypted in enhancing digital picture - Google Patents
The method of the authenticity and expressive force of the hidden image decrypted in enhancing digital picture Download PDFInfo
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- CN108694717A CN108694717A CN201810468547.2A CN201810468547A CN108694717A CN 108694717 A CN108694717 A CN 108694717A CN 201810468547 A CN201810468547 A CN 201810468547A CN 108694717 A CN108694717 A CN 108694717A
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- base map
- image
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- digital picture
- hidden
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/60—Analysis of geometric attributes
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/72—Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection
- H04M1/724—User interfaces specially adapted for cordless or mobile telephones
- H04M1/72403—User interfaces specially adapted for cordless or mobile telephones with means for local support of applications that increase the functionality
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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
- H04N1/32—Circuits or arrangements for control or supervision between transmitter and receiver or between image input and image output device, e.g. between a still-image camera and its memory or between a still-image camera and a printer device
- H04N1/32101—Display, printing, storage or transmission of additional information, e.g. ID code, date and time or title
- H04N1/32144—Display, printing, storage or transmission of additional information, e.g. ID code, date and time or title embedded in the image data, i.e. enclosed or integrated in the image, e.g. watermark, super-imposed logo or stamp
- H04N1/32149—Methods relating to embedding, encoding, decoding, detection or retrieval operations
- H04N1/32267—Methods relating to embedding, encoding, decoding, detection or retrieval operations combined with processing of the image
- H04N1/32272—Encryption or ciphering
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/10—Image acquisition modality
- G06T2207/10016—Video; Image sequence
Abstract
The present invention provides a kind of method of the authenticity and expressive force of the hidden image for enhancing and being decrypted in digital picture, is related to smart mobile phone or the identification of Intelligent mobile equipment information and field of anti-counterfeit technology.This method hides a single width the digital table figure image of base map, and a series of base map of decryption is generated with a series of different Tibetan figure deciphering parameters, a series of this base map image construction animation is used in combination to show.The present invention can greatly increase detection or distinguish real-time, authenticity, the transparency, certainty, live sense and the expressive force of base map, greatly reduce the possibility that printed matter and its smart mobile phone or Intelligent mobile equipment containing hidden image recognition APP are counterfeited, better assure that with smart mobile phone or Intelligent mobile equipment APP sweep figure, barcode scanning it is anti-fake trace to the source, the function of anti-channel conflict, also provide completely new approach for the printed matter expressive force of the figure containing Tibetan.
Description
Technical field
The present invention relates to smart mobile phone or the identification of Intelligent mobile equipment information and field of anti-counterfeit technology more particularly to a kind of increasings
The method of the authenticity and expressive force of the hidden image decrypted in strong digital picture.
Background technology
Has considerably long history in the technology that the Biao Tuli of printing hides other images or information.With the number of printing
Change and develop, the technical method of more and more hidden images or information is developed application, most commonly used to apply anti-fake
Field.It includes the SI technologies of Graphics Security System companies, JURA that most representative high-fidelity, which hides diagram technology,
The high-fidelity that the ICI technologies and number of patent application of company are 201610519053.3 and 201610518384.5 hides the digital linked network of figure
Technology.
The image for the actual displayed that observer can see is known as table figure;By particular technology be hidden in it is under table figure,
Image that is that naked eyes can not be differentiated and just can see by corresponding detection means is known as base map;By base map be hidden in table figure it
Under process be known as hide figure.
Hiding diagram technology is realized by the structural modulation to screen, and the both macro and micro feature of screen is included, and hides figure skill
In art, the detection of base map is usually used to be realized with periodic lenticular lenses, and the detection of base map can also use intelligence
Mobile phone or Intelligent mobile equipment are detected by algorithm.It is far from smart mobile phone or Intelligent mobile equipment detection base map
No more, the base map of detection must have enough confidence levels that user is allowed to firmly believe, be detected on smart mobile phone or Intelligent mobile equipment
And the base map content shown, it is actually coming from the material picture (i.e. printed matter) captured by it, this is smart mobile phone or intelligence
Mobile device identifies the key of base map.
Mobile internet era, smart mobile phone and intelligent mobile terminal equipment have become important in people's daily life
Component part, Query Information shopping, are read, make a reservation, entertaining, exchanging ..., and more and more things are all with smart mobile phone come complete
At.Mobile Internet brings prodigious facility to people's lives, while more and more industries are all mobile Internet knot
It closes, all trades and professions all dock the traffic ingress with mobile Internet.
In anti-fake industry, sweep that figure is anti-fake, barcode scanning is anti-fake, barcode scanning is traced to the source and barcode scanning anti-channel conflict have become it is main, have
Anti-fake, the anti-channel conflict means of effect.And mobile Internet for sweep figure, barcode scanning it is anti-fake trace to the source, the landing of anti-channel conflict provides new base
Plinth technical conditions.One smart mobile phone of consumer's human hand, scanning figure or code true-false inquiring and information of tracing to the source are convenient and efficient;Producer manages
Reason personnel, officer cracking down on fake goods can also hold smart mobile phone or Intelligent mobile equipment scans our company's product, obtain relevant information, to this
Products carry out anti-channel conflict management and crack down on counterfeit goods.Simultaneously with the raising of people's standard of living, consumption is constantly upgrading, people couple
Product quality and added value are increasingly valued, and smart mobile phone or other mobile devices sweep figure, barcode scanning true-false inquiring and information of tracing to the source
The consumer psychology of consumer is complied with, while also being provided for production producer and is prevented fake products, prevents falsifying from providing technology hand
Section.
Sweep figure, barcode scanning anti-fake, barcode scanning anti-channel conflict of tracing to the source mainly there are following a few class modes at present:
The first kind is redirected using APP barcode scannings, that is, the APP of smart mobile phone or Intelligent mobile equipment is used to scan a weight
Code (such as Quick Response Code) is oriented, a new background page is then linked to, a code living is scanned or inputted on the new page
Character string (such as plain code of one yard of a usual object), then one information of background page return, determines authenticity of products or other phases
Close information.
After APP barcode scannings are redirected to a new background page, it is invisible that a naked eyes are scanned using APP again for second class
Hidden Codes, then by background page return an information, determine authenticity of products or other relevant informations.
Third class, APP scan the sightless Hidden Codes of naked eyes, are connected to a backstage to log in or orient heavy chain, so
After return to user related information.
Then 4th class, one backstage of APP initial landings utilize APP to shoot the sightless Tibetan figure of width naked eyes or hide
Code photo, by this still photo pass to backstage, backstage by simply comparing, algorithm compare or image analysis processing, by rear
Platform return the hidden image or Hidden Codes can reading information, or a conclusion is provided in turn, to achieve the purpose that examine the true and false.
The method that above a few class smart mobile phones or Intelligent mobile equipment identify plain code, Hidden Codes or Tibetan figure has limitation.
In first kind technology, since the technology of generated code has versatility, redirects concatenation code and be easy by one
The code of personation is replaced, and when possible barcode scanning is just linked to a false backstage, behind input or the work code of scanning either what,
False website can reply a false information, to mislead user.Therefore, Tibetan figure or Hidden Codes technology become increasingly to weigh
It wants.
In the second class technology, the APP of Hidden Codes is scanned, when scanning to hiding all kinds of so-called Hidden Codes, not in real time
The process or its scanning result for showing identification do not have the direct property distinguished visually, similar secret operation, only after
As the prompt to user, the APP that such APP is easy to be counterfeited is imitated the information that platform returns, and personation APP, which can be utilized, to be known
Read the invisibility of result, no matter any scanning result or ignore scanning result at all, directly reply a personation from the background or
Palm off preset deceptive information in APP.
In three types of technology, such Hidden Codes may also be counterfeited fixed false redirect preset inside APP and link
It is replaced, to lose anti-fake effect.
In the 4th class technology, hides figure or hide the APP corresponding to code technology, identification process is to shoot a figure first
Then piece passes this static images back backstage, be compared with networking backstage, still, this identification method is also easy to be counterfeited
APP replaced by the personation of still image backstage, prediction picture overlapping inside personation APP, prediction picture generation inside personation APP
For etc. means institute it is counterfeit.Its reason is:The basis of this kind of recognition is the static picture of a width fixed image, and counterfeiter can be very
Easily on the static picture of a width fixed image, the personation base map of a preset same fixed image is superimposed, replaced.
In conclusion the base map for detecting hidden image with smart mobile phone or Intelligent mobile equipment is far from being enough, detection
Base map must have enough confidence levels that user is allowed to firmly believe, the bottom for detecting and showing on smart mobile phone or Intelligent mobile equipment
Figure content, be actually coming from its shooting material picture (i.e. printed matter), this be smart mobile phone or Intelligent mobile equipment knowledge
The key of other base map.The base map or Hidden Codes adhered in printed matter is distinguished true using smart mobile phone or Intelligent mobile equipment APP
Reality, key point are real-time, authenticity, the transparency, certainty, live sense and the expressive force of APP recognition processes, and
It can mutually be confirmed with other Aided Physical detection means (such as periodic piece is examined).
Invention content
The technical problem to be solved by the present invention is in view of the above shortcomings of the prior art, provide in a kind of enhancing digital picture
The authenticity of the hidden image of decryption and the method for expressive force, detection can be greatly increased or distinguish the real-time of base map, authenticity,
The transparency, certainty and live sense, greatly reduce the possibility that smart mobile phone or Intelligent mobile equipment APP are counterfeited, preferably
Ensure that with smart mobile phone or Intelligent mobile equipment APP sweep figure, barcode scanning it is anti-fake trace to the source, the function of anti-channel conflict.
In order to solve the above technical problems, the technical solution used in the present invention is:
In a kind of authenticity for the hidden image decrypted in enhancing digital picture and the method enhancing digital picture of expressive force
The authenticity of the hidden image of decryption and the method for expressive force, this method include the following contents:Base map is hidden to a single width
Digital table figure image, a series of base map of decryption is generated with a series of different Tibetan figure deciphering parameters, a series of this bottom is used in combination
Figure image construction animation is shown.
Further, the digital table figure image of the hiding base map includes but not limited to the direct design of digital picture Tibetan figure
The image of image, the printed matter Digital Design image for being concealed with base map or the solid images for being concealed with base map.
Further, the acquisition pattern of the image of the solid images for being concealed with base map includes but not limited to following manner
One or more modes superposition:Entity table figure to being concealed with base map is scanned, takes pictures, recording a video, video, fact regard
Frequently, display screenshotss, display device are shown.
Further, the entity table figure for being concealed with base map includes but not limited to the printed matter for being concealed with base map.
Further, the printed matter for being concealed with base map, the method for hiding base map include but not limited to based on to net
The various modulation of point structure, the lattice point structure modulation include but not limited to the position of site, size, frequency, spacing, phase
Position, direction.
Further, the Tibetan figure deciphering parameter includes but not limited to scale, frequency, direction, phase, position.
Further, the base map of the decryption includes the base map that one or more are hidden under same table figure image, each
Width base map generates a series of base map of decryption by different Tibetan figure deciphering parameters.
Further, the animation can further be stored as animation file by storage device, or be shown by display.
Further, the storage device or display are from including but not limited to smart mobile phone, lithographic plate computer, notebook
Computer, portable electronic terminal, wearable device, Specialised mobile terminal equipment, computer, television set or projector.
Further, the acquisition source of the image of the solid images for being concealed with base map includes but not limited to intelligent hand
Machine, laptop, portable electronic terminal, wearable device, Specialised mobile terminal equipment, camera installation, is taken the photograph lithographic plate computer
As the image component of equipment or scanning device.
It is using advantageous effect caused by above-mentioned technical proposal:It is decrypted in enhancing digital picture provided by the invention
The authenticity of hidden image and the method for expressive force, to a single width hide base map digital table figure image, with it is a series of not
Same Tibetan figure deciphering parameter generates a series of base map of decryption, a series of this base map image construction animation is used in combination to show, to big
The big real-time for increasing detection or recognition base map, authenticity, the transparency, certainty and live sense, greatly reduce smart mobile phone
Or the possibility that Intelligent mobile equipment APP is counterfeited, it better assures that and sweeps figure with smart mobile phone or Intelligent mobile equipment APP, sweeps
Code it is anti-fake trace to the source, the function of anti-channel conflict, also provide completely new approach for the printed matter expressive force of the figure containing Tibetan.
Description of the drawings
Fig. 1 is the side that hidden image in decryption printed matter is analyzed based on digital video image that the embodiment of the present invention 1 provides
The flow chart of method;
Fig. 2 is that being analyzed based on digital video image for caching base map function that carry that the embodiment of the present invention 1 provides decrypts print
The method flow diagram of hidden image in brush product;
Fig. 3 is that being analyzed based on digital video image with cache table figure function that the embodiment of the present invention 1 provides decrypts print
The method flow diagram of hidden image in brush product;
Fig. 4 is the synchronous display method schematic diagram of the switching of the first image or insertion that the embodiment of the present invention 1 provides;Its
In, (a) is continuous live video, is (b) that discontinuous base map is decrypted, and is (c) that the first synchronism switching exports, is (d) the
Two kinds of synchronism switching outputs;
Fig. 5 is the synchronous display method schematic diagram of the switching of second of image or insertion that the embodiment of the present invention 1 provides;Its
In, (a) is continuous live video, is (b) that discontinuous base map is decrypted, and is (c) that the base map of stable output is shown;
Fig. 6 is the method flow diagram that detection Tibetan figure is shown with animation mode that the embodiment of the present invention 2 provides.
Specific implementation mode
With reference to the accompanying drawings and examples, the specific implementation mode of the present invention is described in further detail.Implement below
Example is not limited to the scope of the present invention for illustrating the present invention.
The APP of smart mobile phone or Intelligent mobile equipment is when identifying all kinds of base maps hidden in printed matter, since APP is identified
The limitation of method or the defect of recognizer, the APP that true APP is easy to be counterfeited is replaced, and user can not differentiate APP
The true and false, can not also differentiate the true and false of base map, to which the true and false of former printed matter can not be differentiated, can not effectively realize and sweep figure, sweep
Code it is anti-fake trace to the source, the function of anti-channel conflict.
Core of the invention is exactly the internal algorithm by smart mobile phone or Intelligent mobile equipment APP, is taken the photograph to its camera
To the table figure for keeping base map live video carry out in real time, quickly analysis recognition, the fact of synchronous displaying table figure and the table figure
The base map of detection corresponding to fact, and dynamic comparison is formed, to greatly increase detection or distinguish the real-time of base map
Property, authenticity, the transparency, certainty and live sense, greatly reduce the possibility that APP is counterfeited, better assure that with intelligence
Mobile phone or Intelligent mobile equipment APP sweep figure, barcode scanning it is anti-fake trace to the source, the function of anti-channel conflict.
The invention solves technical difficult point one:The base map that smart mobile phone or Intelligent mobile equipment decrypt, frame
Speed is likely lower than the video frame of the table figure of smart mobile phone or Intelligent mobile equipment camera institute captured in real-time visually nearly singular integral
Number, it is difficult to form the one-to-one correspondence on frame number.The invention solves technical difficult point two:Smart mobile phone or intelligence are improved as possible
Energy mobile device decrypts the frame speed of Tibetan figure.
The basic hardware for decrypting base map in the present invention with Intelligent mobile equipment is required to include but is not limited to:
Device requirement:Camera (camera), display screen and image processor (cpu, gpu, spu signal processor) etc.;
Device type:All kinds of mobile devices such as mobile phone, tablet computer, wearable device, Specialised mobile terminal;
Operating system:Android, ios (apple) etc., can also be the system for being particularly developed customization.
Embodiment 1
Through this embodiment, it will be appreciated that smart mobile phone or Intelligent mobile equipment detect hidden image general flow and
Where difficulty.Video is concatenated by the higher discrete image of frequency acquisition, to be reached visually using the persistence of vision
Continuous effect, each discrete image be known as a frame.In general, the analysis deciphering of hidden image is independent based on each frame
It carries out.
The detection and decryption of base map have specific requirement to the image quality of captured or interception original image.According to Tibetan
The concrete mode of figure, it is desirable that slightly difference, but focusing to camera system and magnifying power have higher requirement.
It is higher anti-fake, anti-copy due to having the function of, the technology of hidden image is realized by the modulation of lattice point structure
(such as:The SI technologies of Graphics Security System companies, the ICI technologies of JURA companies, number of patent application are
201610519053.3 the high-fidelity with 201610518384.5 hides the digital screening technology of figure) there is good development prospect.It is high
The printed matter of quality needs the screen using high line number (such as 175lpi), and hidden image is also necessary under this high-quality printed matter
With the lattice point structure of similar high-frequency (spatial frequency).In order to detect base map, shooting or the image scanned must have enough
High resolution ratio can tell the slight change of lattice point structure.By taking 175lpi as an example, need to have told black (site) and nothing
Black (background) area, therefore, image at least needs the actual resolution of about 2x175=350dpi.For higher anti-fake effect,
When hidden image, often make the screen of higher frequency or more fine structure, therefore, the requirement to the resolution ratio of image also can
Higher, the actual resolution requirement even higher 1000dpi is quite a few to be seen.
Realize that the technology of hidden image is not limited solely to the image of printing by the modulation of lattice point structure, application can also lead to
The lines to body surface is crossed to realize.Such as by be molded, adorn carve the methods of formed in body surface or substrate surface it is similar
The depth lines of site cable or other reflective lines, can also similarly hidden image.When detection, under the conditions of particular light
(such as sidelight) can also treasure figure by the Optical devices such as grating or image processing method solution.The present invention is to such hiding figure
The detection decryption of picture is same effective.
The actual resolution of image refers to the true resolution of image, and is not only the pixel dpi of image.In general,
The actual resolution of image can be less than the pixel resolution of image, much lower sometimes, such as image focusing is bad, then such as phase
Machine uses interpolation calculation, the dpi values etc. to give virtual height.
In order to reach higher spatial resolution, camera on present smart mobile phone or Intelligent mobile equipment generally can be with
Reach the closely shooting (less than 20cm), sometimes, or even to be clapped on the permitted minimum distance of camera (minimum object distance)
It takes the photograph, obtains maximum magnifying power, while ensureing accurately to focus.In terms of technical standpoint, the accurate of short distance is focused to camera just
It is a prodigious challenge, along with the shake of user's hand in shooting process so that it is high-resolution, suitable to obtain a frame
The image of analysis detection decryption base map becomes extremely challenging.
In the present embodiment by taking smart mobile phone as an example, detected in smart mobile phone hiding the corresponding frame page of live video
The method of base map image uses the method for analyzing hidden image in decryption printed matter based on digital video image, as shown in Figure 1, tool
Body method is as described below.
The first step:Exact focus is analyzed:The table figure to be identified is shot with the camera of smart mobile phone or Intelligent mobile equipment,
Analysis is focused to certain frame image captured by smart mobile phone or Intelligent mobile equipment camera.Focusing point to digital picture
Analysis has the method for many routines, including but not limited to Analysis of Contrast, acutance analysis etc..If it is good enough to focus, meet accurate
The requirement of focusing then enters in next step;If not meeting the requirement of exact focus, selection next frame is returned, continues to gather
Burnt analytic process.
The method that the image of the high magnifying power of high-resolution is obtained in video frame page extremely has detection decryption hidden image
Profit.Since the upper camera of short distance is focused because of difficulty, chance is transient.Video image provides a large amount of chance, and to video frame page
The focus analysis of image, which then gives, catches the means for putting forward the chance.
Second step:Geometrical Characteristics Analysis:Calibration, especially image are measured to the geometric properties of above-mentioned frame of digital image
The measurement of scale and direction.
Using pixel as basic unit, geometric properties are described digital picture by the rectangular co-ordinate as unit of pixel.For example,
Center, the trend of lines and point and the spacing of point etc..Wherein, scale (measurement of distance) be as unit of pixel,
Its absolute measure has certain randomness, it is necessary to which there are one amounts to connect the scale of pixel and real space, such as image
Dpi numbers, i.e., the corresponding number of pixels of each inch.
The digital picture of the printed matter of one width hidden image, it is necessary to it meets some requirements, especially the condition of resolution ratio,
It could be detected parsing, extract hidden image.The condition is related to parameter with the mode for hiding figure.Such as based on lattice point structure tune
The digital picture of the Tibetan figure of method processed, carrier (printed matter) in kind must have enough resolution ratio, can clearly differentiate institute
The lattice point structure variation stated, it has to be possible to the clear ink zone for differentiating site and background blank area.That is two sites it
Between at least need to show white space, i.e. at least more than two pixels of the spacing of site there are one pixel.As previously mentioned, by
Scale and angle detecting, if enough resolution ratio (magnifying power and clarity, basic demand is not achieved in image:The dpi > of pixel
2 × screen lpi), which cannot use, and retract and choose next frame, continue first step process.
When the digital picture for hiding base map passes through the analysis of geometric properties, the especially detection of scale and direction meets Tibetan
After resolution requirement needed for figure detection parsing, you can carry out the Tibetan figure detection parsing of next step.
Third walks:Hide figure detection parsing.The detection parsing for hiding figure includes obtaining to hide figure mode and associated parameter.It is right
It is parsed in the detection of digital picture, needs to obtain as unit of pixel and using the coordinate system where pixel as the geometric parameters of reference
Number.
Some or all of mode and parameter of Tibetan figure can be known in advance sometimes, such as hide figure printed matter and produced in design
When parameter (these to hide figure printed matter design parameter it is sometimes still effective to its digital picture);Or algorithm can be passed through and converted
Can be obtained (such as the digital picture obtained by scanner has good geometrical relationship with artwork, including horizontal put down is erected on direction
Directly, few big deflections;On scale also very precisely, such as 600dpi etc.).Therefore, to the Tibetan figure detection of scan image
Parsing can be obtained as unit of pixel, by simply converting with pixel when Tibetan figure mode and relevant parameter is known in advance
Coordinate system is the parameter of reference, then directly handles image with mode corresponding with Tibetan figure mode, detects hiding base map.
But for smart mobile phone or Intelligent mobile equipment, the geometry between solid images and its digital picture closes
System just becomes not knowing very much.For example, the direction of the paper when direction of camera and its shooting can have prodigious angular deviation;
For another example the far and near variation of camera distance printed matter paper can greatly change the scale (such as dpi) of digital picture.This
When, can only have partial information (such as hiding drawing method) that can be obtained ahead of time, and at least partly geometric parameter need by pair
Digital picture carries out analysis measurement and obtains.
As previously mentioned, the Tibetan figure detection parsing to digital picture, it is only necessary to the geometric parameter based on pixel and its coordinate system
(geometric parameter of relative measurement parameter or pixel space), and need be not necessarily based on physical size (such as centimetre, inch etc.)
With the absolute reference of solid images.Front illustrates by taking scanner as an example and (is equal to digital picture by means of the dpi of scanner
Dpi), by the method for the geometric parameter in the absolute geometry Parameter Switch pixel space of solid images.
Tibetan figure detection with the uncertain digital picture of the geometrical relationship of solid images is parsed, a kind of direct method
Exactly by (for helping to establish the datum mark of point-to-point relative position, easily identifying the spy of resolution with positioning mark, anchor point
Different icon) method etc. establish the geometrical relationship of digital picture and solid images.
The method that another kind obtains Tibetan drawing method and geometric parameter based on image processing and analyzing is then more effective, especially needle
To by modulating the technology into conduct figure, such as number of patent application to lattice point structure as 201610519053.3 Hes
201610518384.5 high-fidelity hide the digital screening technology of figure.It is analyzed by the structure feature to site, including but not
It is limited to the analysis to features such as site spacing, period, frequency, trend, shape, sizes, obtains lattice point structure scale, direction, position
It the relevant geometric parameter such as sets, even directly obtains the mode of Tibetan figure.
Existing Tibetan diagram technology is varied, and most of is to be based on digital linked network, such as number of patent application
201610519053.3 and 201610518384.5 high-fidelity hides the digital screening technology of figure, there is screen angle modulation, site frequency
Rate modulation, network cable frequency modulation, dot shape modulation, cable phase-modulation, site phase-modulation, two-way site (cable) phase
Modulation, the methods of dynamic mole line, the basic principle of these methods are:It initial is opened from one with reference to net point net screen system structure
Begin, requires according to figure is hidden, according to the figure for hiding figure, the system structure with reference to site screen is modulated, modulator approach includes
But it is not limited to size, shape, black and white, position, phase, the density of site, frequency, angle etc..For can be by body surface
Lines come the method for realizing Tibetan figure, modulator approach further includes the depth of lines or the power of reflective function.
For the Tibetan diagram technology based on digital linked network, it is generally not required to setting positioning mark.At this moment, the structure of site can be passed through
It calculates, such as by the spacing of site or period (frequency), magnifying power (linear-scale) can be extrapolated using algorithm, is passed through
The direction of site can extrapolate the direction etc. of image.A kind of effective method is calculated in frequency space, such as two dimension
Fourier transformation.With the corresponding position of peak value in frequency space, you can accurately calculate frequency (lpi) and the direction of site.
Tibetan figure mode and hide graph parameter obtain can in conjunction with the information learnt in advance and practical survey calculation as a result, with
Time needed for the accuracy of parameter, Reduction Computation analysis needed for optimizing to the maximum extent and resource.For example, if being known in advance
The general direction of figure site used is hidden, when calculating analysis digital picture parameter, so that it may to be substantially reduced the range of parameter search.
4th step decrypts and obtains base map:The information obtained according to third step and former Tibetan drawing method, drawing method is hidden with original
Corresponding method, is calculated by algorithm, one weight of detection or multiple base map.
According to the former modulation system for hiding figure, corresponding base map manner of decryption is also different, and basic principle is modulation
Site screen afterwards and the initial base map information for comparing with reference to site screw structure, being hidden to decryption.Optical detection is
According to the structure or its certain feature of initial reference site screen, an optical mask or micro mirror array (such as grating are created
Piece) as detection diaphragm, then detection diaphragm image planes cover is equally covered on table figure, through detection diaphragm, so that it may with decryption
Hiding image or information.
To hide base map digital picture decryption, algorithm may include with digital algorithm analog physical decryption device or
Device.Such as:The Tibetan drawing method that a kind of phase with periodical site is modulated, can use the detection of its entity printed matter
The lenticular lenses of respective frequencies detect in a respective direction;Due to have third step provide parameter, accordingly pixel space with
Pixel is that the frequency of unit and directioin parameter have all had, and can be calculated with the digital algorithm similar to grating and detect base map.
It is modulated on 175lpi for example, hiding drawing method, it is 1000dpi to obtain image by camera, then corresponding site
Frequency is the pixel of 175 lines/1000, i.e. 1000/175=5.714 pixels/lines (period), has this in the direction indicated with one group
The digital parallel lines masking-out in period can decrypt base map.
Decryption to the digital picture for implying base map, algorithm include but not limited to use digital algorithm analog physical decipher
The flexibility of part or device, digital algorithm can provide huge room for improvement and chance.One obvious advantage just exists
It is parsed in the detection of the digital picture to hiding multiple base map with a variety of methods or different parameters, is not needing to change detecting instrument
In the case of, Digital Detecting analytical algorithm can be multi-purpose with a figure, and differently or parameter decrypts multiple base map simultaneously.
With mobile detection apparatus obtain a frame it is good can detect that the image of base map is not easy to.Therefore, once finding
Picture frame, it should preserve.Two kinds of storages are exemplified below, includes the method for caching, video, especially fact is regarded
Frequently largely effective.
The first storage caching method, after decrypting base map, base map is stored in and is cached, as shown in Figure 2.Its advantage is that base map
It calls soon, meanwhile, the size (memory size of occupancy) of base map can be smaller than the former artwork for choosing frame.
Original is chosen frame image deposit caching, as shown in Figure 3 by second of caching method.When calling, by recalculating,
Obtain base map.Advantage is the former lossless preservation of artwork for choosing frame, can advanced optimize, can also detect multiple when re-calling
Base map is without depositing several figures.
So far, the present embodiment can obtain one or more and detect the hiding base map parsed, but use
It is far from being enough that smart mobile phone or Intelligent mobile equipment, which decrypt base map, and the base map decrypted must have enough confidence levels to allow
User firmly believes that the base map content for detecting and showing on smart mobile phone or Intelligent mobile equipment is actually coming from it and is clapped
The table figure (i.e. printed matter) in kind taken the photograph.This is the key that smart mobile phone or Intelligent mobile equipment identification base map.
When base map can be decrypted continuously, simultaneous display base map video and Biao Tu videos can form real-time comparison, increase
Strong authenticity.But in many cases, these hiding base maps are likely to discontinuous, and are nonlinear.And by intelligence
Can mobile phone or Intelligent mobile equipment camera captured in real-time to table figure live video be continuous, it is linear.Table figure video
The one-to-one correspondence on frame number can not be formed with the Tibetan figure of detection, to which the comparison one by one by corresponding frame can not be formed.
In order to keep live innervation and the dynamic live sense of reality on the spot in person, and the base map decrypted and decryption can be allowed
The table figure shot when base map is allowed among base map involvement table figure or allows tester that can experience base map conscientiously really at dynamic comparison
The combination of the detection process being derived from inside table figure, rather than the fixation image being preset in algorithm, base map and Biao Tu facts and
It synchronizes to show and just seems extremely important.Below by showing two different presentation modes respectively.When practical operation, both sides
Formula is not repelled, and can use respectively, can also use simultaneously, can be with compatible, combined use.
A kind of method of the fact and authenticity that enhance Intelligent mobile equipment detection of concealed image in the present embodiment is such as
A kind of image shown in Fig. 4 switches or the synchronous display method of insertion, and the first row in figure shows a system of continuous table figure video
List figure frame;Second row shows the corresponding hiding base map decrypted, such as is only obtained on frame number 3,6,7,11
Base map;The third line shows a kind of image display pattern, i.e., with decrypting on the former table figure frame for decrypt the base map
The former table figure picture frame of base map switching.
It is time-consuming shorter in display since the frame number for decrypting base map is limited, it is written in water, it is possible to will not leave behind vision
Effect is persisted, the fourth line in Fig. 4 then shows a kind of method of enhancing base map persistence of vision effect, that is, when extending the display of base map
Between, such as extend 1 second so that observe the real-time video that smart mobile phone or Intelligent mobile equipment camera are taken the photograph in real time in user
When, the persistence of vision effect of real-time video selection table figure frame is left, then synchronism switching, shows 1 second base map decrypted, to
It is formed and is compared.
The core of the method is, when base map is cut, base map and corresponding table figure video are synchronous or almost
It is synchronous.The decryption of base map has certain delay since algorithm calculation amount is larger, but as long as delay is less (being, for example, less than 1 second), no
It can influence the subjective sensation of visual synchronism switching.
The base map obtained by Digital Image Processing generally all also contains the feature of many table figures, rather than completely solely
Stand on the former base map of table figure.The table figure feature that exactly these hidden images are left is compared with the formation of table figure video, especially synchronous
Dynamic comparison so that become extremely difficult using preset fixation image replacement is counterfeit.
Simple switching is used only in the present embodiment, in specific implementation, can also use other transition switching modes, example
Such as switching is overlapped, is fade-in fade-out, the variation of integration percentage or other video transition methods.This mode of the present embodiment can be with
It is broadly interpreted as, in a certain specific display space region, doing one direction synchronism switching or transition to video image at any time,
I.e. in the certain time range of base map incision, table figure video is almost synchronous with base map.It is nonsynchronous when base map is cut out.Institute
With one direction synchronism switching is the core of this method.
The present embodiment provides enhancing Intelligent mobile equipment detection of concealed image fact and authenticity another method,
The mode that realization base map i.e. as shown in Figure 5 and Biao Tu audio video synchronizations are shown.Synchronous display method as shown in fig. 4 is the same, intelligence
The live video for the table figure that energy mobile phone or Intelligent mobile equipment camera are taken the photograph in real time is continuous, but through algorithm picks Biao Tute
The base map that framing decrypts may be it is intermittent, it is nonlinear.In the present embodiment, the area of space of display is divided into several portions
Part, or several windows are directly displayed, in decrypting for multiple window synchronization display table figure facts and a weight or multiple simultaneous
Base map, as shown in Figure 5.
Unlike method shown in Fig. 4, a certain subregion or a certain child window show complete smart mobile phone or intelligence
Can the table figure continuous videos taken the photograph in real time of mobile device camera, and other regions or other child window show it is corresponding
One weight or the multiple base map decrypted from certain table figure frame.The display of the base map of each child window decryption all continues to next width decryption
The base map gone out has the enough display time to be distinguished for user so the display of each child window base map is stable, and base map
Update is synchronous with table figure live video, and cut out and the fact of base map are nonsynchronous.This is that one direction synchronism switching is shown
Another method.
Fig. 4 respectively shows one direction synchronous (being synchronized when only base map update is cut) with Fig. 5 and shows over time and space
Segmentation, but the two and be not antagonistic, can be used together or be compatible with.Such as the live video in embodiment 2 can be by embodiment 1
Some scheme substitutes.Therefore, any combinations mode for the mode that Tibetan figure and table figure audio video synchronization are shown is realized in Fig. 4 and Fig. 5 all
Within the coverage area of the present invention.
Embodiment 2
The decryption for hiding base map in figure printed matter is to combine one group of parameter complete by decryption method corresponding with drawing method is hidden
At the variation of parameter can influence the effect of base map detection.Such as:The most common type hides drawing method, to periodical site
The Tibetan drawing method that phase is modulated, is hidden by this method and schemes later printed matter, and base map can use the matched grating of frequency
Piece detects.The angle change of lenticular lenses, the variation of the density and direction of interference fringe (moir patterns) when base map can be caused to show.
The movement of lenticular lenses can cause phase change, so as to cause the mobile effect of interference fringe (moir patterns).To such printed matter
Smart mobile phone or the Digital Map images that decrypt of Intelligent mobile equipment APP can also obtain similar effect, such as Fig. 6 institutes
Show, method is to do corresponding variation to Tibetan figure detection parameters.For example, the parameter for controlling angle is changed, for another example
The parameter for controlling frequency can be changed, generate series of parameters or parameter group, then with each (group) parameter to print
The digital picture table figure of brush product carries out base map decryption, to obtain a series of image containing base map of detections, this series of images
It can show in animated way, to reach the authenticity effect of higher expressive force.
This animation display mode, it is only necessary to the digital picture of a width table figure can be completed, in a width table figure digital picture,
By the effect and innervation of series of parameters control base map detection, therefore it is not limited to the digital picture obtained by video, it can be with
It is widely applicable for the digital picture obtained in any manner, including but not limited to scans, take pictures, screenshotss, taking frame etc., very
To the design original text for including digital picture.
Finally it should be noted that:The above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations;To the greatest extent
Present invention has been described in detail with reference to the aforementioned embodiments for pipe, it will be understood by those of ordinary skill in the art that:Its according to
So can with technical scheme described in the above embodiments is modified, either to which part or all technical features into
Row equivalent replacement;And these modifications or replacements, it does not separate the essence of the corresponding technical solution, and the claims in the present invention are limited
Fixed range.
Claims (10)
1. the method for the authenticity and expressive force for the hidden image decrypted in a kind of enhancing digital picture, it is characterised in that:The party
Method includes the following contents:A series of digital table figure image that base map is hidden to a single width, with different Tibetan figure deciphering parameters
A series of base map for generating decryption is used in combination a series of this base map image construction animation to show.
2. the method for the authenticity and expressive force for the hidden image decrypted in enhancing digital picture according to claim 1,
It is characterized in that:The digital table figure image of the hiding base map include but not limited to digital picture Tibetan figure direct designed image,
It is concealed with the printed matter Digital Design image of base map or is concealed with the image of the solid images of base map.
3. the method for the authenticity and expressive force for the hidden image decrypted in enhancing digital picture according to claim 2,
It is characterized in that:The acquisition pattern of the image of the solid images for being concealed with base map includes but not limited to one kind of following manner
Or the superposition of various ways:Entity table figure to being concealed with base map is scanned, takes pictures, recording a video, video, live video, display
Device screenshotss, display device are shown.
4. the method for the authenticity and expressive force for the hidden image decrypted in enhancing digital picture according to claim 3,
It is characterized in that:The entity table figure for being concealed with base map includes but not limited to the printed matter for being concealed with base map.
5. the method for the authenticity and expressive force for the hidden image decrypted in enhancing digital picture according to claim 4,
It is characterized in that:The printed matter for being concealed with base map, the method for hiding base map include but not limited to based on to lattice point structure
Various modulation, which includes but not limited to position, size, frequency, spacing, phase, the direction of site.
6. the method for the authenticity and expressive force for the hidden image decrypted in enhancing digital picture according to claim 1,
It is characterized in that:The Tibetan figure deciphering parameter includes but not limited to scale, frequency, direction, phase, position.
7. the method for the authenticity and expressive force for the hidden image decrypted in enhancing digital picture according to claim 1,
It is characterized in that:The base map of the decryption includes the base map that one or more are hidden under same table figure image, each width base map
A series of base map of decryption is generated by different Tibetan figure deciphering parameters.
8. the method for the authenticity and expressive force for the hidden image decrypted in enhancing digital picture according to claim 1,
It is characterized in that:The animation can further be stored as animation file by storage device, or be shown by display.
9. the method for the authenticity and expressive force for the hidden image decrypted in enhancing digital picture according to claim 8,
It is characterized in that:The storage device or display from include but not limited to smart mobile phone, lithographic plate computer, laptop,
Portable electronic terminal, wearable device, Specialised mobile terminal equipment, computer, television set or projector.
10. the method for the authenticity and expressive force for the hidden image decrypted in enhancing digital picture according to claim 3,
It is characterized in that:The acquisition source of the image of the solid images for being concealed with base map includes but not limited to smart mobile phone, lithographic plate
Computer, laptop, portable electronic terminal, wearable device, Specialised mobile terminal equipment, camera installation, picture pick-up device
Or the image component of scanning device.
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Application publication date: 20181023 |