CN106780285A - A kind of stored technology hidden in application picture and component - Google Patents
A kind of stored technology hidden in application picture and component Download PDFInfo
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- CN106780285A CN106780285A CN201710032749.8A CN201710032749A CN106780285A CN 106780285 A CN106780285 A CN 106780285A CN 201710032749 A CN201710032749 A CN 201710032749A CN 106780285 A CN106780285 A CN 106780285A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T1/00—General purpose image data processing
- G06T1/0021—Image watermarking
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T1/00—General purpose image data processing
- G06T1/0021—Image watermarking
- G06T1/0092—Payload characteristic determination in a watermarking scheme, e.g. number of bits to be embedded
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2201/00—General purpose image data processing
- G06T2201/005—Image watermarking
- G06T2201/0065—Extraction of an embedded watermark; Reliable detection
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Abstract
The invention provides one kind in computer application picture, a large amount of hidden stored techniqueflows, and successfully develop Information Embedding and the technology component for solving, comprising conciliating figure device two parts into figure device, employ with picture color as coding units hidden deposits encoding operation, on the basis of picture internal memory is not increased, realize it is hidden deposit bulk information or data, and effectively can interpret to come from the picture of load information.The present invention does not change picture structure in itself and visual sensory, has obvious technological progress in information loading technique, the hidden structure, hidden capacity of depositing of depositing of information, which enhances the information Store and deciphering technology of profound level, has a wide range of applications.
Description
Technical field
The present invention relates to computer disposal picture and the technical field of information Store, more particularly to one kind is in computer application
Hidden stored technology and component in picture.
Background technology
With developing rapidly for social information's technology, in picture Processing Technique field, people for picture treatment and
Application aspect has larger development.The information of picture is hidden to deposit technology, is also a kind of very popular picture application treatment skill
Art.Picture is hidden to deposit information technology, mainly in the unrecognizable scope of human sight apparatus, with computer is by picture and believes
The binary data of breath does delicate combination or arrangement, so as to by Information hiding in picture, cause ordinary people visually without
Method identifies the minor variations of picture, reaches the hidden purpose for being stored in picture of information.
At present in computer electronic technology field, emerge successively it is many text or file can be processed, it is and hidden
The technology ensconced in picture, is applied to the aspects such as the encryption of picture and text, the storage of file.In present informatized office work or exchange, have
, when placing, important content, the information of the inside usually can be by intentionally, unintentionally for a little important information electronic documents, file printout original text
Spy on, shoot, replicate, cause privacy leakage, business secret leakage produces massive losses, thus brings many puzzlements.One
A little hidden technologies deposited of picture be also used for business exchange, internet exchange, information encryption and it is false proof in, but such technical products is generally
The additional function of software, fails to form single running software system, so as to cause operation extremely complex, it is impossible to flexibly call,
Can not popularize this important efficient, inexpensive information is hidden and deposit technology.
The content of the invention
By the way that to the hidden technical research for depositing the information such as text of picture, the present invention proposes one and is enclosed within application drawing piece, hidden to deposit
The technology and porcess system of the information such as text, and successfully develop the component software that information enters and solves.Set picture is hidden deposits for this
The technology component of information, contains into two parts of figure device reconciliation figure device, and employ with picture color as coding units hidden deposits
Encryption algorithm.The present invention effectively realizes the hidden function of depositing information or data in application picture, and effectively can believe from loading
Interpreted in the picture of breath it is hidden deposit information or data text, realize that high efficiency, reliable information are hidden and deposit and understand.It is hidden compared to other
Technology is deposited, the present invention has obvious technological progress feature in information loading technique, the hidden structure, hidden capacity of depositing of depositing of information, specifically
It is as follows：
1. memory data output is big
The hidden stored method of picture of the invention, is binary data to picture in itself, makees regular in structure
Selection and covering, information is realized on this basis and is implanted into again, its information opens up increment at least original picture self-information amount
Half, which greatly improves memory data output, has expanded the utilization rate of picture internal memory.
2. visual sensory change is small before and after picture
Due to the pixel digit of the color of coloured image it is higher when, its color is also trueer.The vision of people is also with regard to nothing
Method it is sensitive distinguish the small difference of color of image, and the insensitivity that the present invention is exactly utilization vision is reached micro
Change on the basis of image perception, realize the implantation of information.
3. the memory size of picture is not changed
Due to the hidden stored method of the present invention, last position for using each pixel to constituting picture is carried out
Treatment, pixel value is changed using the method for position covering.First have to for hiding information to be first converted into binary data chain, then
One ground reads；Then bit scan is carried out to image, while entering line position covering, completes the insertion of information.This causes hidden depositing
Have the picture and original picture of information, size is identical in committed memory spatially, i.e., the hidden picture deposited after information, its internal memory without
Increment.So, on the basis of original memory headroom is constant, in the way of pixel color data position position covers, greatly extend
The loading capacity of information or data.
General principle and implementation method
In computer system, screen system is shown as the matrix of pixel, i.e. image and can use a series of data of pixels
Gather to represent.In monochromatic figure, each binary digit represents a picture pixels, and 0 corresponding black, 1 correspondence is white, and
Then need to be represented using several binary systems for coloured image, the digit of each pixel data, decision can be in single bitmap
The number of the different color of appearance, such as pixel 4, can produce 16 kinds of colors, and digit represents that color is abundanter, and image is got over
Access expansion color is RGB.Substantially, when color reaches RGB, the vision of people cannot sensitively distinguish small face
Aberration is different, because image is made up of various pixel values, therefore we can by change slightly picture color (as
Plain value) realize that the hidden of information is deposited.
Specific processing mode：The present invention is to constituting last 4 of each color RGB component of each pixel of picture
Processed, the storage of information is realized using the method for position covering, wherein suitably changing the partial value of original picture pixel.
Specific steps：1. the hidden information deposited will be needed, is converted into binary data string, then a ground reads；2. it is right
Original image carries out bit scan, reads the RGB color component of each pixel of image；3. choose each pixel color component last 4
Data, and covered with hidden stored data bit, if 0, then relevant position is 0, if 1, then relevant position is 1, is completed
The implantation of information data and covering；4. the hidden picture for depositing specify information is shown；5. information in image is read, then makees reverse
Treatment, scanning, read image each pixel RGB color component last 4 data, constitute binary data catena, then turn
Change GBK yards into, you can display is in plain text.
The present invention realizes the hidden application component deposited of information using picture, including conciliates figure device, two technology wounds into figure device
New product, operational flowchart is as shown in Figure 1.The application component of detailed description below two：
First, Cheng Tuqi：
Picture is hidden stored into figure device as shown in Fig. 2 in structure composition, this is main by the main boundary of drawing formation system into figure device
Face, project edit interface and picture selection interface composition, the concrete function at each composition interface are as follows with operation setting：
(1) drawing formation system main interface, as shown in Figure 2.Mainly by three message boxs, two parameter set buttons, two work(
Can property button and a parameter display area composition.Three message boxs, are divided into positioned at the upper left of main interface, right upper and lower, are followed successively by
Original pattern frame, hidden information picture of depositing generate frame, information editing's frame.Its function is respectively：
Original pattern frame：For depositing, showing selected hidden stored picture.It can deposit various pictures.
It is hidden to deposit information picture generation frame：Picture for depositing, after display system implantation information.System is by the hidden presence of information
After picture, can be shown in the inframe, overall structure and moulding without destroying original pattern.
Information editing's frame：The message box is used to be input into the information to be implanted into.Can be Chinese character, symbol, English etc..The frame
In information will change into the form of binary data, carry out correspondence coding.
Drawing formation system main interface parameter set button：As shown in Fig. 2 mainly there is " Protocol Numbers " and " the pixel length of side ".Tool
Body function is as follows：
" Protocol Numbers " button, for arrange parameter, by clicking on Protocol Numbers, can allow user to preserve, check or change
In the numbering plan into figure content, in each scheme into figure, set up the parameter setting of many composition schemes separately again.This is into figure
In device, 20 kinds of generations of picture, edit scenarios can be at least preserved, this decapacitation is reappeared outside the pattern for having completed, to repeated application
Into figure picture, it is not required that do the work edited again.The segmentation scheme number can be according to actual adjustment quantity.
" the pixel length of side " button, the parameter is for adjusting the hidden size for depositing information picture for having generated, its adjusting range
In 1 to 9 interval, " the pixel length of side " numerical value is often adjusted once, the hidden dimension of picture deposited in information picture generation frame just changes
Once, its size variation is proportional law, i.e., per improving upwards, " 1 " is individual to be measured the pixel length of side, then picture size expands in proportion
One times.
Two functionality buttons, mainly include " generation " and " preserving figure code ", and two buttons are upper and lower to be positioned in main boundary successively
The center section in face." generation " button, after selecting to handle picture and injection information well, the generation of order system is corresponding hidden to deposit
The picture of information；The function of " preserving figure code " button, is that generated hidden information picture of depositing is saved in local file, this
Individual picture, the figure code file for also serving as encryption shows.
" edit scenario " button, is the button that next interface is opened from drawing formation system main interface, and " scheme is opened by it
Editor " interface, such as Fig. 3, the interface are used to generate hidden stored picture, are to make and process the hidden picture deposited before information.
One parameter display area, is " the code length of side " column, is the ratio value for showing Geometry coding cell size, this code length
Degree is designed as ratio value, and an intrinsic pixel size of general setting machine, is a Geometry coding unit, with ratio it is true
Make different code lengths, be also this yard of information storage reference point, this into figure device, generation each picture is hidden deposit information when,
All allow computer to calculate code length automatically, and show, so that the information storage situation in real-time monitored pattern.
(2) " project edit " interface：It is clicked opening by Fig. 2 into " edit scenario " in figure device system interface, launches
" project edit " interface, as shown in figure 3, left side from top to bottom, is sequentially provided with functionality buttons：" opening picture ", " open text
Shelves ", " emptying scheme " " completion scheme "；Right frame is " picture display frame ", and respective function is as follows：
" opening picture "：In " project edit " interface, after clicking on " opening picture " button, third party's picture can be entered
" opening " interface, such as Fig. 4, in this interface, user carries out the selection treatment to third party's picture.
" emptying scheme "：For emptying already present picture and its hidden stored picture of generation in currently displaying frame.
" completion scheme "：Refer to that current hidden information picture of depositing has been completed, after click, preserve current hidden stored picture, and
Jump to software systems main interface.
" picture display frame "：Picture for depositing, after display system implantation information.
Present invention application picture is hidden stored as follows into figure device operating procedure：
(1) open of the invention into figure device system interface, selection scheme numbering is optional in configured Protocol Numbers
One, as editor, conservation object." edit scenario " button is clicked on, into " project edit " interface.
(2) in " project edit " interface, " opening picture " button is clicked on, hiding information is wanted in selection from local device
Picture, selection finish after, the picture can be displayed in right side picture display frame in.Finally, " completion scheme " is clicked on, is returned to
Into figure device system main interface.The hidden stored picture as needed for needing change, then click on " emptying scheme ", then in the display box of right side
The picture of loading will be completely removed, and re-start Scheme Choice.
(3) in the Information into figure device system main interface, the hidden information deposited needed for input clicks on " generation " button, leads to
Software is crossed to constituting the data processing of each colored pixels of picture, the method covered using position completes the implantation of information.
(4) after adjusting that the information for having generated is hidden and depositing picture, " preserving figure code " button, hidden stored figure is clicked on
Piece, is separately stored in local device, and renaming.One applicable hidden picture for depositing specify information is just generated.Can also
The hidden password protection of file is applied to deposit and propagation.
Above content describes the present invention and utilizes picture hidden stored into figure device substantially, and this has been created into figure device at present
Build, and obtain good use.
2nd, Xie Tuqi：
The present invention utilizes the hidden Xie Tuqi for depositing information technology component of picture, as shown in figure 5, from the point of view of structure composition, this solution
Figure device has two display boxes, three functionality buttons.
Concrete function sets as follows with operation：
(1) two display box, is divided into the right and left positioned at solution figure device interface, and left frame is for the hidden picture display frame, right frame deposited
The display box of deciphering information.Its function is respectively：
It is hidden to deposit picture display frame：For showing the hidden picture for depositing customizing messages, solution figure device system is conducted into, to be
System is understood to it.
Understand message box：For storing, showing the information content that plug-in reader reads from picture.
(2) three functionality buttons, respectively positioned at the upper right side at solution figure device interface, including " selection picture ", " interception figure
Piece ", " solution figure is decoded " this three.
The function of " selection picture " button is that direct access is saved as the hidden file for depositing picture to carry out solution figure, picture
It can be forms such as " GIF " " JPG " " png ".
" interception picture " is by intercepting one on current computer screen hidden stored picture, it is automatically credited solution
Drawing system, and be displayed in picture box, wait and understanding.
" solution figure is decoded " is that this solution figure device carries out solution figure to the hidden picture deposited in picture display frame, clicks on this button, just
Automatic to perform solution read operation, it is not necessary to by ancillary equipment, its result is displayed in deciphering message box.
The scheme understood to information：Solution figure process is the hidden inverse process for depositing information mapping process, and information in image is read,
Make reverse process, last 4 of scan image each pixel, binary system catena is constituted after reading, reconvert can show in plain text.
Therefore, the solution figure device assembly in the present invention, primary operational is as follows：1. select or intercept one and deposit information comprising hidden
Picture, be input to solution figure display box, carry out solution figure；2. understanding in message box, checking the information of Xie Tuhou.
Function above so that invention components solution figure device, can be suitably used for above-the-line promotion and the various hidden of display deposits picture product
Product are understood, and under conditions of internal memory is not increased, the hidden ciphertext part of energy has wide range of applications.
Brief description of the drawings
Fig. 1 is using the hidden flow chart deposited information and understand information of picture；
Fig. 2 is hidden stored into figure device system interface figure in picture；
Fig. 3 is to open " project edit " surface chart into figure device system；
Fig. 4 is to quote the surface chart opened during third party's picture；
Fig. 5 is to understand the hidden stored solution figure device surface chart of picture；
Fig. 6 is example original picture；
Fig. 7 is that example original picture is imported into figure device system diagram at " project edit " interface；
Fig. 8 is the surface chart of the implantation information in sample picture after treatment for preparing；
Fig. 9 is in the surface chart into figure device main interface editor's information；
Figure 10 is in into figure device interface, to generate the hidden picture surface chart for depositing text message；
The hidden picture patterns for depositing text message of Figure 11；
Figure 12 is introduced into the hidden solution figure device surface chart for depositing text message picture；
Figure 13 is to interpret the hidden solution figure device surface chart for depositing text message.
Specific embodiment
Present example describes a kind of hidden technology for depositing text message of utilization picture and its component application scheme, including into
The operating process that figure device conciliates figure device further illustrates foregoing invention content, and with the implementing procedure in Fig. 1；With Fig. 2 into
Figure device, Fig. 5 Xie Tuqi come generate conciliate interpreting blueprints piece in the hidden information deposited.
Lower example is the hidden process for depositing text message in picture：
1st, a picture for treating loading information is selected, as shown in Figure 6.
2nd, picture is processed in into figure device and hidden stored picture is generated：
1. into figure device main interface, on " Protocol Numbers " column, selection numeral is 0 Protocol Numbers；
2. " edit scenario " button is clicked on, into " project edit " interface, its " opening picture " button is clicked on, by picture
Location paths, by specified picture include in the left frame column at " project edit " interface.As shown in Figure 7；
3. at " project edit " interface, " completion scheme " button is clicked on, interface rotates back into figure device main interface, selected
Treat that loading information picture will be displayed in left figure frame, such as Fig. 8；
4. into figure device main interface " information editing's frame ", the hidden text message deposited, such as Fig. 9 are wanted in input；
5. in the pixel value and the code length of side being adapted into figure device main interface, selection, then " generation " button is clicked on, an implicit finger
The picture for determining information is indicated in the display box of the right, as shown in Figure 10；
6. into figure device interface, clicking on " preservation " button, and the hidden stored picture of generation, the picture is named will to protect
It is resident locally in equipment, for using, such as Figure 11.
7. determine to treat the picture of loading information for one, in the next time of storage information and when applying again, above-mentioned mapping process,
Can automatically be rapidly completed, be not required to excessive artificial link operation.
The hidden picture for depositing stylistic information, the process for solving figure reading information is as follows：
1. solution figure device interface, such as Fig. 5 are opened；
2. " selection picture " button or " interception picture " button in solution figure device are clicked, it is selected it is hidden deposit information picture, and show
In the pattern column of the left side, such as Figure 12；
3. " solution figure is decoded " button is clicked on, on the right in Information, the hidden information deposited in picture is shown in order, such as schemed
13。
In this example, text message does not change picture in itself by that into figure device, can be implanted directly into designated pictures
Structure and visual sensory, realize the hidden function of there are designated pictures of text message, and it is empty not increase the internal memory of original pattern
Between.In this example, the hidden text message deposited in picture, by Xie Tuqi, interpret in picture the hidden information deposited.It can be seen that, this
Invention hidden stored technology and component in picture, increased the information Store and deciphering technology of profound level, there is extensive
Application prospect.
Above example, a specific embodiment only of the invention, but protection scope of the present invention are not limited thereto, and appoint
What those familiar with the art, all any modifications within the spirit and principles in the present invention, made, equally replaces
Change, improve, should be included within the scope of the present invention.
Claims (6)
1. the invention provides one kind in computer application picture, hidden stored technical scheme and application component are employed
Hidden with picture color as coding units deposits encoding operation, realizes on the basis of picture internal memory is not increased, and is not changing picture
It is hidden to deposit bulk information or data in the case of itself structure and visual sensory, and can be understood effectively from the picture of load information
Out；Its operating assembly, comprising conciliating figure device two parts into figure device.
2. according to claims 1, in computer application picture, employ with picture color as coding units hidden deposits
Encoding operation, it is characterized in further have following implementation steps：1. by computer, the hidden information deposited will be needed, is converted into two and enters
Serial data processed, then ground reading；2. bit scan is carried out to original image, the RGB color point of each pixel of image is read
Amount；3. last 4 data of each pixel color component are chosen, and is covered with hidden stored data bit, if 0, then accordingly
Position is 0, if 1, then relevant position is 1, completes the implantation and covering of information data；4. the hidden figure for depositing specify information is shown
Piece；5. deposit hidden information in image and read, then make reverse process, scanning, read the RGB color component of image each pixel
Last 4 data, constitute binary data catena, and reconvert is into GBK yards, you can display is in plain text.
3. according to claims 1, in computer application picture, hidden stored operating assembly, comprising into figure device and
Two parts of solution figure device, they are characterized in：
(1) into figure device system main interface, mainly by three message boxs, two parameter set buttons, two functionality buttons and
Individual parameter display area is constituted, wherein three message boxs, are divided into positioned at the upper left of main interface, right upper and lower, is followed successively by original pattern
Frame, hidden information picture of depositing generate frame, information editing's frame；
(2) solution figure device has two display boxes, three functionality buttons, and two of which display box is divided into positioned at solution figure device interface
Right and left, left frame be it is hidden deposit picture display frame, the display box that right frame is deciphering information；Three functionality buttons, are located at respectively
The upper right side at solution figure device interface, including " selection picture ", " interception picture ", " solution figure is decoded " this three.
4. according to claims 1,3, in computer application picture, hidden stored operating assembly, comprising into figure device
Two parts of figure device are conciliate, it is characterized in further that their function setting is respectively：
(1) in into figure device system main interface, its function setting has：
1. original pattern frame：For depositing, showing selected hidden stored picture；
2. it is hidden to deposit information picture generation frame：Picture for depositing, after display system implantation information；
3. information editing's frame：For being input into the information to be implanted into；
4. " Protocol Numbers " button, for arrange parameter, by clicking on Protocol Numbers, can allow user to preserve, check or change
In the numbering plan into figure content, in each scheme into figure, set up the parameter setting of many composition schemes separately again；
5. " the pixel length of side " button, the parameter is that its adjusting range is 1 for adjusting the hidden size for depositing information picture for having generated
To in 9 interval, " the pixel length of side " numerical value, the hidden dimension of picture deposited in information picture generation frame, just change one are often adjusted once
Secondary, its size variation is proportional law；
6. button " is generated ", after selecting to handle picture and injection information well, the generation of order system is corresponding hidden stored
Picture；
7. the function of " preserve figure code " button, be by it is generated it is hidden deposit information picture, be saved in local file；
8. " edit scenario " button, " project edit " interface is opened by it, and the interface is used to generate hidden stored picture, is system
Make and process the hidden picture deposited before information；
9. " the code length of side " column, is the ratio value for showing Geometry coding cell size, this into figure device, setting machine it is intrinsic one
Individual pixel size, is a Geometry coding unit, with ratio determine different code lengths, in generation, each picture is hidden deposits
During information, all allow computer to calculate code length automatically, and show, so that the information storage situation in real-time monitored pattern；
(2) in figure device system main interface is solved, its function setting has：
1. it is hidden to deposit picture display frame：For showing the hidden picture for depositing customizing messages, it will be understood；
2. message box is understood：For storing, showing the information content read from picture；
3. " selection picture " button is that direct access is saved as the hidden file for depositing picture；
4. " interception picture " is by intercepting one on current computer screen hidden stored picture, it is automatically credited solution figure
System, and be displayed in picture box, wait and understanding；
5. " solution figure is decoded ", clicks on this button, automatic to perform solution read operation, it is not necessary to by ancillary equipment.
5. according to claims 1,3,4 into figure device, click on its " edit scenario " button, open " project edit " boundary
Face, the interface from top to bottom, is sequentially provided with functionality buttons from left side：" opening picture ", " opening document ", " emptying scheme "
" completion scheme "；Right frame is " picture display frame ", and wherein major function sets and is characterized as：
1. " opening picture "：After clicking on, third party's picture interface can be entered, user carries out the selection to third party's picture
Treatment；
2. " scheme is emptied "：For emptying already present picture and its hidden stored picture of generation in currently displaying frame；
3. " completion scheme "：It is current it is hidden deposit information picture after the completion of, click on, preserve current hidden stored picture,
And jump to system main interface.
6. the operating procedure into figure device, Xie Tuqi according to claims 1,3,4 is as follows：
(1) figure device system interface, selection scheme numbering, optional in configured Protocol Numbers, as volume are opened into
Volume, conservation object, click on " edit scenario " button, into " project edit " interface；
(2) in " project edit " interface, " opening picture " button is clicked on, the figure of hiding information is wanted in selection from local device
Piece, after selection is disposed, clicks on " completion scheme ", returns into figure device system main interface；
(3) in the Information into figure device system main interface, the hidden information deposited needed for input clicks on " generation " button, system pair
The data processing of each colored pixels of picture is constituted, the method covered using position completes the implantation of information；
(4) after adjusting that the information for having generated is hidden and depositing picture, " preserving figure code " button is clicked on, hidden stored picture is separately deposited
To in local device, and renaming；
(5) primary operational of Xie Tuqi：1. select or intercept one and include hidden stored picture, be input to solution figure and show
Frame, carries out solution figure；2. understanding in message box, checking the information of Xie Tuhou.
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| CN201710032749.8A CN106780285A (en) | 2017-01-11 | 2017-01-11 | A kind of stored technology hidden in application picture and component |
| PCT/CN2017/000578 WO2018129640A1 (en) | 2017-01-11 | 2017-09-11 | Technology and assembly for storing information in application picture in hidden manner |
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| WO2018129640A1 (en) * | 2017-01-11 | 2018-07-19 | 江苏图码信息科技有限公司 | Technology and assembly for storing information in application picture in hidden manner |
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| CN102270335A (en) * | 2010-06-03 | 2011-12-07 | 三星电子（中国）研发中心 | Method for embedding additional information into image |
| CN103778590A (en) * | 2012-10-24 | 2014-05-07 | 航天信息股份有限公司 | Method and device for utilizing digital image to store and transmit information |
| CN105303510A (en) * | 2014-07-31 | 2016-02-03 | 国际商业机器公司 | Method and device for hiding information in image |
| CN104202501A (en) * | 2014-08-29 | 2014-12-10 | 西安空间无线电技术研究所 | Method for performing information carrying and transmission in image |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018129640A1 (en) * | 2017-01-11 | 2018-07-19 | 江苏图码信息科技有限公司 | Technology and assembly for storing information in application picture in hidden manner |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2018129640A1 (en) | 2018-07-19 |
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