CN1991901A - Method and device for embedding finger water-print information - Google Patents
Method and device for embedding finger water-print information Download PDFInfo
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Abstract
The invention relates to an embeding immediate gained fingerprint watermark to digit image method and device and digital camera which can embed the fingerprint watermark to digit image and detect information of fingerprint watermark. The invention belongs to fields of digital image watermark technology. The picture took by the digital camera of the invention can check the perfectness and copyright. When the image is edit, updated, added and deleted, the changing of the image can be known by checking the perfectness, so the fidelity of the image can be realized, that digital picture is as electronic evidence is possible. At the same time, because the human original fingerprint is as the watermark information, the copyright information can be identified by extracting fingerprint watermark to achieve the effect of copyright identification.
Description
[affiliated technical field]
The present invention relates to a kind of method and apparatus that in digital picture, embeds the finger water-print information in time obtain, and a kind of can to take a picture and embed the digital camera of finger water-print.The invention belongs to the digital figure watermark technology.
[background technology]
Digital camera is the product that the digitizing technique with maturation combines with traditional camera.In today of the growing maturation of digitizing technique, digital camera is owing to the parent that its convenient and swift fashion obtains men and women, old and young looks at.Digital camera can be taken high-quality digitized image, and can allow you that they are passed through printout on network bamboo telegraph or the color printer.Conveniently simultaneously because digital photograph can be made amendment by various softwares and edit at an easy rate, its as the copyright information of photo and true integrality all by big heavy discount.Can not be as the multimedia photo as the evidence of court, the doctor can not only be confined to analysis to digital pathological image to the judgement of the state of an illness.At the new problem that this new technology is brought, we can realize by the built-in photo fidelity device of digital camera.
At present, digital watermark technology is a kind of comparatively effective method, is used for preventing and differentiate that modes such as despiteful individual or group spread through the internet under the situation that does not obtain data file owner permission duplicate and propagate the document of copyright protection wantonly.Digital watermark technology is to add some numerical information to reach effects such as differentiating its true complete sum copyright protection in multi-medium data (as image, sound, vision signal etc.).We utilize embedded digital watermarking device in digital camera, are used for differentiating the true integrality of digital photograph.Simultaneously, utilize special watermark information, thereby realize better copyright protection effect.
The watermark information that embeds digital picture can be photographer's a finger print information.Because everyone has nothing in common with each other on pattern, breakpoint and point of crossing by (comprising fingerprint) skin lines, that is to say, be unique, and constant throughout one's life.Rely on this uniqueness and stability, we just can be mapped a people with his fingerprint, compare by fingerprint that compares him and the fingerprint of preserving in advance, just can verify his true identity.At present, by computing machine fingerprint being discerned, is one of biometrics identification technology that is most widely used now.
In the prior art, Friedman has proposed a kind of method based on digital signature in document " GL.Friedman The trustworthy digitalcamera restoring credibility to the photographic image.IEEE Trans; Consumer Electron; Vol.39; PP.905-910; Nov.1993 ", be used for confirming the authenticity of digital camera photo, the method is to utilize RSA arithmetic, generate the digital signature of image again by magazine private cipher key, preserve as another file, together issue with image.Domestic consumer is by public-key cryptography like this, combining image file and digital signature file thereof again, and authenticity that can authentication image, but this method has the shortcoming that has increased storage space, inconvenient administering digital signing messages, can not survey the distortion situation.All first-class people that dives under water have proposed image is divided into two zones in patent documentation " embeds the system and the image modification detection system of authentication information; application number: CN97121196.9; the applying date: 1997.10.27 " to image, calculate hashed value from a zone of image, utilize the hashed value that obtains the block of pixels coding method to be embedded into another zone of image then, with regional assembled unit two zones are merged to get up again.The shortcoming of this method maximum is exactly to orient the zone that image is altered.WongP W document " Wong P W.A publickey watermark for image verification andauthentication[A] .In:Proc of the IEEE International Conference onImage Processing (ICIP ' 98) [C]; Chicago; Illinois; USA; 1998,1:455-459 " in a kind of public-key cryptography water mark method that is used for image authentication has been proposed.The watermarking algorithm of this digital picture is to be utilized as image block to locate the zone of altering, if this piecemeal is handled the method for image and is used on digital camera, to reduce the speed of taking pictures of digital camera greatly, therefore, it is unsatisfactory to be used on the digital camera practicality.Same inventor has proposed the method and apparatus that a kind of digital figure watermark adds and verifies in patent documentation " method of digital figure watermark and related device and the digital camera that can add watermark; number of patent application: CN200510055680.8; the applying date: 2005.3.23 ", and a kind of digital camera that adds watermark, the document has disclosed true integrality how to utilize Fragile Watermark Technique to verify digital picture, thereby has realized the fidelity of logarithmic code photo.But the document is not mentioned the copyright protection that how to realize digital photograph.
[summary of the invention]
At existing deficiency in the prior art, the objective of the invention is to: propose a kind of digital camera that embeds the method and apparatus of finger water-print information and can embed, detect finger water-print information.With the photo that this digital camera is taken, can verify its true integrality and copyright authentication.When picture is edited, after the modification, additions and deletions, can be by the method for the true integrality of checking picture, learn photo by change, thereby realized the fidelity of digital photograph, make digital photograph become possibility as electronic evidence.Simultaneously, owing to be used as the original fingerprint for the people that takes pictures of watermark information in this method, thus can verify copyright owner's information by the method for the watermark that takes the fingerprint, thus reach the effect of copyright authentication.
In order to achieve the above object, the present invention is performed such.
Usually the fingerprint that also is known as signature or hash is the result who the perceptual feature of signal is insinuated the function of binary sequence.Different with the password hash that very easily damages (the single position of upset source data can produce a diverse hash usually), fingerprint is understood that it is strong herein.Just, if source signal is that similarly so Dui Ying fingerprint also is very similar on consciousness.Therefore fingerprint is used for digital image information.This fingerprint and examples of applications thereof be at Jaap Haitsma, and " be used for content aware strong audio frequency and disturb (Robust Audio Hashingfor Content Identification) in a jumble " of Ton Kalker and Job Oostveen work, (being published in the machine that Italy Brescia holds had disclosed in multimedia index (CBMI) 2001 meetings (Content-Based Multimedia Indexing 2001Conference) of content.
The present invention utilizes digital watermark technology, before image imaging, embeds in the digital picture taking the digital finger-print information of gathering simultaneously, and as the foundation of copyright authentication, the copyright person's identity in the time of can the discriminating digit image imaging.Simultaneously, among the present invention by the digital picture that embeds finger water-print information is carried out the dividing data position, thereby the steps such as eigenwert of computed image can realize the fidelity of digital photograph.
The digital watermark processing system can represent WS (A, W, K, E, D) with following function:
The A digital picture of indicating to protect wherein; K represents the watermark secret key; W represents watermark, and the generation of digital watermarking is generally pseudo random number etc., and W=W (K, A); E represents the embedding algorithm of watermark, and watermark embeds to be watermark is embedded in the original figure works, and general formula is represented: E:W '=E (A.E)
Common algorithm is:
I
W,=I (i)+α (i) W (i) addition principle
I
W,=I (i) (1+ α (i) W (i)) multiplication principle
I (i) expression Digital Media amplitude or variation factor, W (i) is watermark, α (i) is a strength factor.D represents the detection algorithm of digital watermarking.D:H (D (K, W ')), W ' is the image behind the embed watermark, and detection algorithm is generally coherent detection, and it is that 1 expression has watermark through the result of decision behind the detection algorithm as H that H represents, is 0 as H, then is expressed as no watermark.
At first, first invention provides a kind of method that embeds finger water-print information in digital picture.This method comprises: obtain digital image information, obtain the digital finger-print information of original fingerprint, utilize digital watermark technology in described digital image information, to embed the watermark information that comprises described digital finger-print information, obtain three basic steps of new digital image information that contain described digital finger-print information.Then the new digital image information that contains described digital finger-print information is taked following steps:
First step conversion image data is converted to new digital image information the data value of data of described each pixel of digital picture of expression;
The second step dividing data position is divided according to the position according to the different pairs of application target, and the data step-by-step of writing down each pixel in the described digital picture is divided into the position of computed image eigenwert, the position of embed watermark.
The calculating of the 3rd step number word image eigenwert utilizes unique eigenwert of the described digital image information of eigenvalue calculation algorithm computation according to the position of computed image eigenwert;
The 4th step was encrypted unique eigenwert of described digital image information;
The 5th step was utilized the eigenwert after the position of the embed watermark of digital watermark technology in described new digital image information hides described encryption.
The method of embed watermark has disclosed in same inventor's patent documentation " method of digital figure watermark and related device and the digital camera that can add watermark, number of patent application: CN200510055680.8, the applying date: 2005.3.23 " in the inventive method.
The present invention also comprises the method that the finger water-print that embeds is verified in digital picture, the actual inverse process for the watermark embedding of this method.
Second invention provides a kind of device that embeds finger water-print in digital picture, comprise the device that obtains view data that is used for obtaining digital image information, be used for obtaining the device that obtains finger print data of the digital finger-print information of original fingerprint, be used for utilizing digital watermark technology in described digital image information, to embed the watermark flush mounting of the watermark information that comprises described digital finger-print information.And the device that obtains view data comprises the device that obtains image data value of data value of the data of each pixel that is used to obtain to represent the described digital picture that has digital finger-print information, be used for the position classification apparatus will the described data step-by-step that has each pixel of digital picture of digital finger-print information of record divided, and the position classification apparatus can be divided into the position of computed image eigenwert, the position of embed watermark with the data step-by-step of each pixel in the described digital picture of record.Be used for calculating the eigenwert generation device of the eigenwert of the described digital picture that has digital finger-print information in addition.In addition, described watermark flush mounting also comprises the encryption device that watermark information is encrypted.
The present invention also comprises the device that the finger water-print that embeds is verified in digital picture.
The 3rd invention provides a kind of digital camera that embeds finger water-print information, comprise the device that obtains view data that is used for obtaining digital image information, be used for obtaining the device that obtains finger print data of the digital finger-print information of original fingerprint, be used for utilizing digital watermark technology in described digital image information, to embed the watermark information that comprises described digital finger-print information, obtain a watermark flush mounting that contains the new digital image information of described digital finger-print information.Wherein, the device that obtains finger print data comprises the fingerprint image acquisition device that is used to carry the platform of finger and is used for obtaining the finger print information of pointing on the platform.The described platform that is used for carrying finger can be made by transparent material, becomes platy structure, and platform can combine with shutter.Described be used for carrying the finger platform also can be arc groove or round bump.Describedly be used for carrying front portion and the bottom that the finger platform also can be positioned at digital camera.The fingerprint image acquisition device can be for having the device of digital camera functionality, being used for gathering the finger print information that is carried on the platform.
The fingerprint image acquisition device can be an infrared scanner also, is used for scanning the finger print information that is carried on the platform.Like this, offer a crack on the platform of corresponding with it carrying finger, for noctovisor scan.When adopting this device, finger need have the action of slip before the platform crack, could gather complete finger print information.
Common digital camera generally only has the common device that obtains view data, central data processor and memory storage.As mentioned above, in digital camera of the present invention, also added a device that obtains finger print data.Wherein, the platform of carrying finger can be arc groove or round bump, can be the flat board of a flat transparent softness also, is used as the platform of placing finger.The platform rear of carrying finger or below a micro lens is arranged, thereby obtain the complete finger print information of finger, such as trickle information such as pores, digital finger-print information is complete more, is convenient to fingerprint contrast in the future more.The fingerprint image acquisition device can be a miniature digital camera module, and the light signal of the original fingerprint that obtains is changed into digital signal.In an embodiment, the described platform that is used to carry finger is connected with camera shutter, photographer is when taking digital photograph, when pressing camera shutter, the device that obtains finger print data of this digital camera just can obtain photographer's digital finger-print information simultaneously, then digital finger-print information is embedded in the digital photograph of taking simultaneously, as copyright authentication information as watermark information.The device that obtains finger print data also can be a noctovisor scan processor, by infrared scan finger print information is obtained.The device that obtains finger print data also can be other device.
In digital camera of the present invention, added a watermark flush mounting in addition, this device can be placed in the central data processor in the described digital camera.This device is embedded into the digital finger-print information the obtained form with watermark in the digital image, the mode that embeds discloses in same inventor's patent documentation " method of digital figure watermark and related device and the digital camera that can add watermark; number of patent application: CN200510055680.8; the applying date: 2005.3.23 " fully, quotes fully herein.
The 4th invention provides a kind of digital camera that detects finger water-print information in the digital picture, comprise and be used for from described digital picture, utilizing the corresponding digital digital watermark to extract the extraction watermarking device of the finger water-print information of embedding, obtain the fingerprint deriving means of finger print information, be used for more described finger water-print information and described finger print information, and the output unit of the result of determination shown in the comparatively validate device of result of determination and the output.
This device can be placed in the central data processor in the described digital camera, also can be used as the processor that independent apparatus module places computing machine and so on, and the logarithmic code photo detects, and judges its copyright information and true integrality.The process that photo detects, what comprise digital signal reads, discerns corresponding position, the algorithm by the corresponding calculated eigenwert, obtain unique eigenwert of digital signal, from digital signal, utilize the corresponding digital digital watermark to extract hiding watermark information, the watermark information that deciphering extracts, the watermark information after eigenwert that relatively calculates and the deciphering is if the two equates, illustrate that photo was not truly altered, otherwise the true integrality of photo does not ensure.Then, utilize the corresponding digital digital watermark to extract hiding watermark information once more, the watermark information after deciphering once more and the digital finger-print information of appointment are compared, the digital finger-print information of described appointment can be from being stored in the digital finger-print information in the digital camera, perhaps from the timely digital finger-print information of extracting of the device that obtains finger print information, if the two is complementary, the host of the copyright person of this photo for the digital finger-print information of appointment then is described, if the two does not match, the copyright person that this photo is described is not the host of the digital finger-print information of appointment.The method that fingerprint is relatively taked is a digital finger-print information correlation technique, and this technology is a prior art, no longer sets forth here.
Note, in the present embodiment, when calculating the eigenwert of digital signal, only use the data in the position of computed image eigenwert to participate in computing.This is in order to mate between the eigenwert that guarantees calculated feature values and embedding.If the data on the position of hiding watermark are all used such as color signals such as black or whites fill, so such data just can entirely be imported the algorithm of computation of characteristic values.Like this, even also can guarantee correct checking result after embedding data.
When detecting photo, can also on Internet, set up authentication center, set up fingerprint database in this authentication center, anyone can detect the copyright information and the true integrality of picture here, and the result of notarization checking.
In addition, though present embodiment the invention is not restricted to this, but goes for such as digital display circuits such as digital videos for the digital camera explanation.And, present mobile phone, PDA (palm PC), notebook, video media player etc. has all added the module of digital camera, also can be suitable for method and apparatus of the present invention.
In addition, use device of the present invention, also can adopt method shown in the present to carry out authentication,, deposit in this device as obtaining specific person's finger print information earlier, then when the user uses, must be according to the finger print information that originally deposited in, thus judge user's use of whether obtaining the authorization, if be not authorized, can only use the partial function in this device, perhaps can not use fully.Even, do not have can use aforesaid method under the situation of start at this device yet, if do not authorize, can not start shooting.
The present invention's's " a kind of method and apparatus that embeds finger water-print information " advantage is as follows:
1, since the present invention to adopt photographer's digital finger-print be watermark information, before digital image-forming, the finger print information embedding that just will in time obtain, thereby copyright that can the logarithmic code photo authenticates, and confirms its copyright information.
2, because the present invention adopts built-in watermark embed system, and before the photo imaging, added watermark information, from beginning most just to have guaranteed the authenticity of digital photograph.
3, among the present invention, device that obtains finger print information and watermark flush mounting all are built in the digital camera, realized integrated, thereby be convenient for carrying.
4, the present invention is when embedding eigenwert, according to the mankind's visual characteristic, success data message is hidden in the insensitive zone of image vision, guarantee the image vision difference minimum before and after the embed watermark.
5, present, the microprocessor speed of digital camera is compared slowly and the processing speed of the CPU on the PC can't be mentioned in the same breath.Do not use block division method to handle image in the present invention, make processing speed improve greatly, thereby making to be applied in becomes possibility in the digital camera.
[description of drawings]
Fig. 1 a is the front view of traditional digital cameras
Fig. 1 b is the rear view of traditional digital cameras
Fig. 2 a is a kind of rear view of present embodiment digital camera
Fig. 2 b is a kind of rear view of present embodiment digital camera
Fig. 3 is the structural drawing that present embodiment shown in Figure 2 obtains the device of finger print data
Fig. 4 is present embodiment digital camera internal module figure shown in Figure 2
Fig. 5 is the inner watermark flush mounting of a present embodiment digital camera synoptic diagram shown in Figure 2
Fig. 6 is the process flow diagram that present embodiment corresponding shown in Figure 5 is verified photo
[embodiment]
The present invention is described in further detail below in conjunction with drawings and Examples, and see also accompanying drawing.
Being the front view of traditional digital cameras 100 shown in Fig. 1 a, is the rear view of traditional digital cameras 100 shown in Fig. 1 b.Shown in Fig. 1 a, 1b, traditional digital cameras 100 comprises shutter device 101, view-finder 102, flashlamp 106, main lens 104, LCDs 105 and user input apparatus 103.User input apparatus 103 generally comprises button 103A-103C.User input apparatus 103 allows user input data and selects to use the various functions of camera.
In operation, the user adjusts the position of camera 100 and removes to obtain needed image by view-finder 102 or LCDs 105.When camera 100 was placed on the appropriate location, the user pressed shutter device 101, thereby obtained needed image.And optical imagery is hinted obliquely at imageing sensor 400 by main lens 104, and the signal here all is an optical signalling.The image that is obtained shows on LCDs 105.Flashlamp 106 is user's servicing units when obtaining the image optimum light effects in being in the not good zone of light status.User input apparatus 103 is user input data and the various functions of selecting to use camera 100.
Fig. 2 a is the rear view of the digital camera 200 among the present invention.Digital camera 200 can be used as the camera function of ordinary digital camera, can obtain simultaneously photographer's finger print information, and the form of this finger print information with watermark is embedded in the captured digital photograph, thereby can judges the copyright information and the true integrality of captured digital photograph.Why digital camera 200 can realize this function, is because added our bright method and apparatus of setting forth.Shown in Fig. 2 a, digital camera 200 comprises the used same parts of digital camera 100, simultaneously, comprises the platform 201 that obtains fingerprint.In the present embodiment, when the user presses shutter device 101, generally be to touch shutter device 101 with forefinger, simultaneously, thumb is placed on the platform 201 that obtains fingerprint, this device is a transparent flat board.After shutter device was pressed, digital camera 200 obtained needed image by main lens 104 on the one hand, obtains user's finger print information on the other hand simultaneously by the platform 201 that obtains fingerprint.
In the present invention, the platform 201 that obtains fingerprint also can be placed on other positions of digital camera 200, is integrated as one such as platform 201 that will obtain fingerprint and shutter device 101, shown in Fig. 2 b.When user's filmed image was pressed shutter device 101, its finger finger was placed on the shutter device 101, and digital camera 200 just can obtain the finger print information that the user presses the finger finger of shutter device 101 by the platform 201 that obtains fingerprint simultaneously.In addition, the platform 201 that obtains fingerprint also can be placed on other positions, rear portion of digital camera 200, perhaps in the bottom of digital camera 200, perhaps in the front portion of digital camera 200.When user's filmed image is pressed shutter device 101, in order to stablize digital camera 200, use on the fuselage that other finger is placed on digital camera 200, as its rear portion, bottom or anterior position, this position is the position that obtains the platform 201 of fingerprint.Like this, also can be when the user to take pictures, digital camera 200 obtains the finger print information that the user presses finger other fingers in addition of shutter device 101.
Fig. 3 is the schematic representation of apparatus of obtaining finger print data of the present embodiment digital camera shown in Fig. 2 b.The platform 201 that obtains fingerprint is the auxiliary equipments on the digital camera 200, is a flat board in the present embodiment.The device that obtains finger print data comprises platform 201 and the fingerprint image acquisition device that obtains fingerprint, the fingerprint image acquisition device comprises a pair of light emitting diode 202a, 202b, a pair of opaque light baffle plate 203a, 203b, an attachment lens 204 and a miniature digital camera module 205.
Finger 300 is placed on the platform 201 that obtains fingerprint, and this platform is transparent, soft, a dry material in the present embodiment, is convenient to finger and places.In the present invention, the user places its finger for convenience, and the platform 201 that obtains fingerprint also can curved groove or round bump shape.When gathering finger print information, light emitting diode 202a, 202b emit beam, and opaque light baffle plate 203a, 203b block the downward light that light emitting diode 202a, 202b send, and be transmitted on the device 201.The finger print information of finger 300 is hinted obliquely at attachment lens 204 by light.Attachment lens 204 is an attachment lens, is a micro lens in the present embodiment, and the complete finger print information that micro lens can obtain to point is such as trickle information such as pores.Attachment lens 204 also can be a wide-angle lens.To miniature digital camera module 205, miniature digital camera module 205 is converted to digital signal with optical signalling to attachment lens 204, and is stored in the storer at last with the optical signalling transmission of fingerprint.
In addition, in the present invention, the fingerprint image acquisition device also can adopt infrared scanner, like this, offers a crack on the platform of corresponding with it carrying finger, for noctovisor scan.When adopting this device, finger need have the action of slip before the platform crack, could gather complete finger print information.The device that obtains fingerprint also can be other device.
Fig. 4 is present embodiment digital camera 200 internal module figure shown in Figure 2.Digital camera 200 comprises main lens 104, obtains the platform 201 of fingerprint, attachment lens 204, imageing sensor 400 (master image sensor and auxilliary imageing sensor), control device 401, central processing unit 402, dynamic storage 407, nonvolatile memory 403, built-in Control Software 404, watermark embedded software 405, data input/output interface 406, shutter device 102, LCDs 105, user input apparatus 103 etc.There is built-in Control Software 404 in the nonvolatile memory 403, includes watermark embedded software 405 in the built-in Control Software 404.
When the user presses shutter device 102, central processing unit 402 and control device 401 drive imageing sensor 400 and obtain image, this image comprises the master image of being obtained from main lens 104, also comprises from what attachment lens 204 was obtained being placed on fingerprint image on the platform 201 that obtains fingerprint.In the present embodiment, image processor 400 is two imageing sensors (master image sensor and auxilliary imageing sensors), the master image sensor is handled the master image of being obtained from main lens 104, and auxilliary imageing sensor is handled from what attachment lens 204 was obtained and is placed on fingerprint image on the platform 201 that obtains fingerprint.In the present invention, also two imageing sensors can be merged into an imageing sensor.Imageing sensor 400 is transferred to central processing unit 402 with the pixel data of representative image then.The pixel data of two images stores in the dynamic storage 407 temporarily, and simultaneously, the image that main lens 104 is obtained will show on LCDs 105.The built-in Control Software 404 that is stored in the nonvolatile memory 403 is used for controlling central processing unit 402, also contain watermark embedded software 405 in the built-in Control Software 404, the digital finger-print information that is used for temporarily being stored in the finger 300 that is obtained in the dynamic storage 407 embeds in the digital picture in the watermark mode, obtain a new digital picture, this image is stored in the nonvolatile memory 403 at last.
In the present invention, built-in Control Software 404 also can comprise the software that is used for detecting watermark information.By user input apparatus 103, choose a digital camera 200 image detection function is carried out watermark detection with built-in Control Software 404 to the digital photographs that are stored in the storer 403, detects the true integrality of digital photograph, and carry out fingerprint simultaneously and contrast, identify its copyright information.Testing process as shown in Figure 6.Related algorithm is a known technology, no longer describes in detail.
In the present invention, digital camera 200 can be used for limited subscriber and use the function of digital camera 200, such as forbid unauthorized user take pictures or watch be stored in the nonvolatile memory 403 before the photo taken.The finger print information that has only user's finger print information and be stored in the mandate in the nonvolatile memory 403 in advance matches, and could use these functions.In the present invention, can also be limited under the situation of digital camera 200 shutdown, have only after the fingerprint user rs authentication by digital camera 200, digital camera 200 could be started shooting.
Data input/output interface 406, be used for digital camera 200 be connected such as electronic equipments such as computer, digital partners, at transmitting data information between the two.Such as with the image data download in the digital camera 200 in electronic equipment.In the present invention, the software that detects watermark information also can be installed in this electronic equipment, and the view data from digital camera 200 is detected, and detects the true integrality of digital photograph, and carries out fingerprint simultaneously and contrast, and identifies its copyright information.
As Fig. 5 is the inner watermark flush mounting of the present embodiment digital camera shown in Fig. 2 b synoptic diagram.Digital camera 200 comprises the device 501 that obtains the digital signal signal value, the device a 502 of embed watermark information, position classification apparatus 503, the device 504 of computation of characteristic values, encryption device 505, cipher key calculation device 506, the device b507 of embed watermark information, nonvolatile memory 403, main lens 104, attachment lens 204, imageing sensor 400 (master image sensor and auxilliary imageing sensor) etc.
The device 501 that obtains the digital signal signal value is used to read out the value of digital signal, and this digital signal is to be reacted to the digital signal that the analog signal conversion in the digital camera becomes by optical imagery; The device a502 of embed watermark information is used for utilizing digital watermark technology that digital finger-print information is embedded into digital picture.Position classification apparatus 503 is used for the data step-by-step of each pixel of record digital image is divided into the position of computed image eigenwert, the position of hiding watermark; The device 504 of computation of characteristic values is used for according to the position of digital picture computed image eigenwert unique eigenvalue calculation of the digital signal of input being come out; Key generating device 506 is used to generate key; Encryption device 505 is used to the eigenwert of utilizing secret key encryption to calculate; The device b507 of embed watermark information is used for utilizing the eigenwert after digital watermark technology will be encrypted to be embedded into the position that digital signal is hidden watermark.
Arrive imageing sensor 400 when image passes through main lens 104, imageing sensor passes to device 501 with signal then, and device 501 reads out the value of digital signal.Simultaneously, finger 300 finger print information to imageing sensor 400, is converted to digital signal with the optical signalling of fingerprint image by attachment lens 204, promptly represents the pixel data of digital picture.Then, imageing sensor passes to device 501 with digital signal, and device 501 reads out the value of digital signal.By the device a502 of embed watermark information, utilize digital watermark technology that digital finger-print information is embedded in the digital picture again.The value of digital signal that contains finger water-print is again by classification apparatus 503, with the data step-by-step of each pixel in the record digital image be divided into the computed image eigenwert the position, hide the position of watermark.Then, device 504 is used for according to the position of digital picture computed image eigenwert unique eigenvalue calculation of the digital signal of input being come out.By encryption device 505, the secret key encryption that utilizes key generating device 506 to generate calculates eigenwert again.At last, by the device b507 of embed watermark information, utilize the eigenwert after digital watermark technology will be encrypted to be embedded in the position of the hiding watermark of digital signal.After above calculating, the digital picture that contains the digital finger-print watermark the most at last is stored in the nonvolatile memory 403.
Fig. 6 is the process flow diagram that present embodiment corresponding shown in Figure 5 is verified photo.The step of the operation of checking digital photograph is as follows: step 601 reads for digital signal, restores digital signal earlier from the photo of lossless format.Step 602 is designated the position of computed image eigenwert, the position of hiding watermark with the data step-by-step of each pixel in the record digital image.Step 603 is for utilizing the corresponding digital digital watermark to extract hiding watermark information the position that hides watermark from digital signal.The watermark information of step 604 for utilizing the PKI deciphering to extract.Step 605 obtains unique eigenwert of digital signal according to the algorithm of the data run corresponding calculated eigenwert of the position of computed image eigenwert in the digital picture.The watermark information of step 606 after for the eigenwert that relatively obtains and deciphering, if the two equate, enter next step, if unequal, illustrate that photo is untrue.Step 607 is for to utilize the corresponding digital digital watermark to extract hiding watermark information once more.Step 608 is the watermark information that contains finger print information that relatively extracted and the digital finger-print information of appointment, be used for judging if the digital finger-print information of described watermark information and appointment is identical, the digital finger-print information of then judging described digital picture and described appointment is complementary, and the affirmation of photo copyright is described.If the digital finger-print information of described watermark information and appointment is different, judge that then the digital finger-print information of described digital picture and described appointment does not match, illustrate that the photo copyright is not inconsistent.
In the above-described embodiments, told about and how to have utilized the present invention, in digital camera, realized finger print information is embedded digital photograph in the mode of watermark, and to its method of verifying.In addition, though present embodiment the invention is not restricted to this, but goes for such as digital display circuits such as digital videos for the digital camera explanation.And, present mobile phone, PDA (palm PC), notebook, video media player etc. has all added the function of digital camera, also can be suitable for method and apparatus of the present invention.
Above embodiment is the technical scheme of unrestricted our face in order to explanation only, although the present invention is had been described in detail with reference to the foregoing description, those of ordinary skill in the art is to be understood that: still can make amendment or be equal to replacement the present invention, and the task of not breaking away from the spirit and scope of the present invention is revised or local the replacement, and it all should be encompassed in the middle of the claim scope of the present invention.
Claims (16)
1. method that embeds finger water-print information in digital picture may further comprise the steps:
(1) obtains view data, obtain digital image information; With
(2) obtain finger print data, obtain the digital finger-print information of original fingerprint;
(3) utilize digital watermark technology in described digital image information, to embed the watermark information that comprises described digital finger-print information, obtain a new digital image information that contains described digital finger-print information.
2, a kind of method that embeds finger water-print information in digital picture as claimed in claim 1 is characterized in that: the new digital image information that is obtained in the step (3) is carried out following processing:
First step conversion image data is converted to new digital image information the data value of data of described each pixel of digital picture of expression;
The second step dividing data position is divided according to the position according to the different pairs of application target, comprises the position of computed image eigenwert, the position of embed watermark;
The calculating of the 3rd step number word image eigenwert, according to image feature value the position unique eigenwert of utilizing the described digital image information of eigenvalue calculation algorithm computation;
The 4th step was encrypted unique eigenwert of described digital image information;
The 5th step was utilized the eigenwert after the position of the embed watermark of digital watermark technology in described new digital image information hides described encryption.
3, a kind of device that embeds finger water-print in digital picture comprises:
(1) obtains the device of view data, be used for obtaining digital image information;
(2) obtain the device of finger print data, be used for obtaining the digital finger-print information of original fingerprint;
(3) watermark flush mounting is used for utilizing digital watermark technology to embed the watermark information that comprises described digital finger-print information in described digital image information.
4, a kind of device that adds finger water-print in digital picture as claimed in claim 3 is characterized in that: also comprise:
A, obtain the device of image data value, be used to obtain to represent the data value of each pixel of the described digital picture that has digital finger-print information;
B, position classification apparatus are used for the described data value step-by-step that has each pixel of digital picture of digital finger-print information of record is divided into the position of computed image eigenwert, the position of embed watermark;
C, eigenwert generation device calculate the described eigenwert that has the digital picture of digital finger-print information according to the position of computed image eigenwert; Wherein
The eigenwert of this digital picture be embedded into as digital watermark information the view data that has digital finger-print information embed watermark the position in.
5, as each described a kind of device that adds finger water-print in digital picture among the claim 3-4, its feature also is: described watermark flush mounting also comprises the encryption device that watermark information is encrypted.
6, a kind of digital camera that embeds finger water-print information is characterized in that comprising:
(1) obtains the device of view data, be used for obtaining digital image information;
(2) obtain the device of finger print data, be used for obtaining the digital finger-print information of original fingerprint;
(3) watermark flush mounting is used for utilizing digital watermark technology to embed the watermark information that comprises described digital finger-print information in described digital image information.
7. a kind of digital camera that embeds finger water-print information as claimed in claim 6 is characterized in that the device that obtains finger print data comprises:
A, be used to carry the platform of finger;
B, fingerprint image acquisition device are used for obtaining the finger print information of pointing on the platform.
8. a kind of digital camera that embeds the finger water-print device as claimed in claim 7, it is characterized in that: described platform is made by transparent material, becomes platy structure.
9. a kind of digital camera that embeds the finger water-print device as claimed in claim 7 is characterized in that: described fingerprint image acquisition device is the device with digital camera functionality.
10. a kind of digital camera that embeds the finger water-print device as claimed in claim 7 is characterized in that: offer a slit on the described platform.
11. a kind of digital camera that embeds the finger water-print device as claimed in claim 7, it is characterized in that: platform is positioned at the shutter position of digital camera, and described shutter is that transparent material is made.
12. a kind of digital camera that embeds the finger water-print device as claimed in claim 11, it is characterized in that: curved groove of described platform or round bump, the fingerprint image acquisition device obtains the finger print information of the finger that is positioned at the user on arc groove or the round bump.
13. a kind of digital camera that embeds the finger water-print device as claimed in claim 7, it is characterized in that: platform is positioned at the bottom of digital camera.
14. a kind of digital camera that embeds the finger water-print device as claimed in claim 7, it is characterized in that: platform is positioned at the front portion of digital camera.
15. a kind of digital camera that embeds the finger water-print device as claimed in claim 7 is characterized in that described fingerprint image acquisition device is the noctovisor scan module, is used for scanning fingerprint information.
16. a digital camera of verifying finger water-print information in the digital picture comprises:
Extract watermarking device, be used for from described digital picture, utilizing the corresponding digital digital watermark to extract the finger water-print information of embedding;
The fingerprint deriving means obtains finger print information;
The comparatively validate device is used for more described finger water-print information and described finger print information and result of determination; Output unit, the result of determination shown in the output.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510135689 CN1991901A (en) | 2005-12-31 | 2005-12-31 | Method and device for embedding finger water-print information |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200510135689 CN1991901A (en) | 2005-12-31 | 2005-12-31 | Method and device for embedding finger water-print information |
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| CN1991901A true CN1991901A (en) | 2007-07-04 |
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| CN 200510135689 Pending CN1991901A (en) | 2005-12-31 | 2005-12-31 | Method and device for embedding finger water-print information |
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