CN102682239A - Digital watermark technology based copyright protection method orienting to remote sensing tile data - Google Patents

Digital watermark technology based copyright protection method orienting to remote sensing tile data Download PDF

Info

Publication number
CN102682239A
CN102682239A CN2012101394228A CN201210139422A CN102682239A CN 102682239 A CN102682239 A CN 102682239A CN 2012101394228 A CN2012101394228 A CN 2012101394228A CN 201210139422 A CN201210139422 A CN 201210139422A CN 102682239 A CN102682239 A CN 102682239A
Authority
CN
China
Prior art keywords
watermark
image
watermark information
tile
remotely
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN2012101394228A
Other languages
Chinese (zh)
Inventor
任娜
朱长青
崔翰川
朱一姝
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Changshu Nanjing Normal University Development Research Institute Co Ltd
Original Assignee
Changshu Nanjing Normal University Development Research Institute Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Changshu Nanjing Normal University Development Research Institute Co Ltd filed Critical Changshu Nanjing Normal University Development Research Institute Co Ltd
Priority to CN2012101394228A priority Critical patent/CN102682239A/en
Publication of CN102682239A publication Critical patent/CN102682239A/en
Pending legal-status Critical Current

Links

Images

Landscapes

  • Editing Of Facsimile Originals (AREA)
  • Image Processing (AREA)

Abstract

The invention discloses a digital watermark technology based copyright protection method orienting to remote sensing tile data. According to the method, based on the analysis of the characteristics of the remote sensing tile data and the requirements of the remote sensing tile data for copyright protection, watermark information is not lost in the spliced watermark-containing remote sensing data and is only changed in coordinate positions, and the synchronization relationship between raw data and the watermark information is effectively guaranteed by virtue of an established watermark embedding rule. During watermark detection, image blocks containing the watermark information are rapidly and accurately located by adopting a golden section method search mechanism, and the watermark information is extracted from the image blocks. According to the copyright protection method disclosed by the invention, the characteristics of pixel values of the remote sensing tile data before and after splicing are fully utilized to realize the correct extraction of the watermark information subjected to splicing, so that the robustness of a watermark algorithm is greatly increased, the problem that the tile data cannot resist splicing attacks at present is solved, and the copyright of the tile data is protected effectively.

Description

Copy-right protection method based on digital watermark technology to the tile remotely-sensed data
Technical field
The invention belongs to geography information copyright protection field, be specifically related to a kind of digital watermark method that is directed against the employing Fibonacci method of tile remote sensing image data,, realize the copyright protection of tile remotely-sensed data to improve the anti-splicing ability of remote sensing image digital watermarking algorithm.
Background technology
Along with development of internet technology; The application of geodata is more extensive; Many websites such as Baidu, Google etc. all provide the electronic chart service, are geodata releasing software popular of representative with Google Earth particularly, have greatly promoted the development of geomatics industry.China is also greatly developing the network geographic information service; Mapping geography information office of country unites national each province and city and has developed " day map " website; Actively promoted geography information resource Joint construction and sharing; In very short time, realized national multiple dimensioned, eurypalynous comprehensive utilization of resources and online service, open 4 days the number of visiting peoples just up to more than 460 ten thousand person-times.At present, the geodata service presents fast development situation under the network environment.
Geodata is normally deposited in service end with the form of section under the network environment, and slice size is 256 * 256 pixel.The tile pyramid is a kind of multiresolution data model, and its core is layering and piecemeal, and raw data resample is produced new figure layer according to different resolution, and same figure layer carries out even subdivision by the sizing grid of appointment and promptly gets tile.At first be that original image data is set up image pyramid, then each rank image pyramid generated the tile remotely-sensed data according to fixing size, with the stored in form of picture file under the hard disk catalogue of server.System loads the tile remotely-sensed data according to user's range of choice, and is faster, more convenient than traditional real-time rendering mode response speed, is common method in the present network environment.The tile remotely-sensed data also have data volume huge, upgrade fast characteristics, " day map " website for example, total tile number of host node and partial node is up to 10,000,000,000.But; There is a deadly defect in the data of this tile storing mode; Promptly be very to be easy to download; So that at present safety problems such as geodata illegal download, illegal uses, withholding are serious day by day and give prominence to, serious harm data owner's rights and interests, upset the normal development of geomatics industry.Adopting the copyright of tile remotely-sensed data under the effective technical means protecting network environment is the problem that presses for solution at present.
Digital watermark technology is the cutting edge technology of information security; It is with watermark information and carrier data is combined closely and hide wherein; Become the inseparable part of carrier data, come to confirm the copyright owner thus, follow the tracks of abuse, authenticated digital content authenticity, provide about other additional informations of digital content etc.
Digital watermark technology was developed in the mid-90 in last century, was developing comparatively ripely aspect the safeguard protection in fields such as image, video, audio frequency at present, and was obtaining many successful Application.In recent years, aspect the geodata safeguard protection, digital watermarking has obtained the concern of height, has also obtained many important achievement, for significant contribution has been made in the geodata safeguard protection.Yet,, study also very shortage to the digital watermark technology of tile remotely-sensed data characteristics from present research.
In network environment, implement the copyright protection of effective tile remotely-sensed data and the new problem that the information security means become mapping digital applications field, have important theoretical meaning and using value.
Summary of the invention
The objective of the invention is to: to present tile remotely-sensed data digital watermark can't solve watermark information synchronously, be difficult to the opposing splicing and attack; Can't effectively protect tile remotely-sensed data copyright problem; A kind of anti-splicing watermarking algorithm based on Fibonacci method is proposed; Make watermarking algorithm keep on the resist geometric attacks basis, the splicing that is highly resistant to the tile data is attacked, thereby has improved the robustness of algorithm.
In order to realize the foregoing invention purpose, the technical scheme that the present invention taked is: a kind of copy-right protection method to the tile remotely-sensed data based on digital watermark technology is characterized in that may further comprise the steps:
(1) watermark information generates: read significant literal; Convert the Word message that reads to binary sequence
Figure 137899DEST_PATH_IMAGE001
according to coded system, the sequence length that is converted to is
Figure 404933DEST_PATH_IMAGE002
; The binary sequence that generates is spread to length be
Figure 603833DEST_PATH_IMAGE003
, wherein
Figure 210395DEST_PATH_IMAGE004
; To the binary sequence scramble of spread spectrum, obtain watermark information
Figure 203758DEST_PATH_IMAGE005
;
(2) watermark embeds: the embedded location of confirming watermark information; Set up the many-one mapping function between watermark information position and the tile remotely-sensed data; Promptly confirm function
Figure 958088DEST_PATH_IMAGE006
; Wherein,
Figure 695100DEST_PATH_IMAGE007
expression watermark embeds the position, and
Figure 156168DEST_PATH_IMAGE008
representes remotely-sensed data gray-scale value and window Mean Parameters thereof respectively; Set up and embed rule; The embedded mode of watermark information can be expressed as:
Figure 586012DEST_PATH_IMAGE009
; Mapping function establishment according to setting up is located embed watermark information at pixel value , the embedding rule of
Figure 102761DEST_PATH_IMAGE011
expression watermark; Image data behind the preservation embed watermark information;
(3) watermark detection process: read the remote sensing image data of moisture official seal breath, obtain the size of image; Horizontal direction to image is carried out golden section, two-part related coefficient after the difference computed segmentation, and more two-part related coefficient size keeps that big a part of image of related coefficient; The image blocks that retains is carried out the golden section of vertical direction, the related coefficient of two parts image after the computed segmentation respectively, more two-part related coefficient size, that big a part of image of reservation related coefficient; Repeat the comparison procedure of cutting apart of above level and vertical direction; When the facies relationship numerical value of the big partial image of related coefficient greater than pre-set threshold, or the image blocks size after cutting apart minimumly stops when dividing block size smaller or equal to predefined, and the output testing result.
Coded system is the reversible encoding mode.Embed the embedding rule of rule for quantizing.It is 256 * 256 that the minimum of image setting is divided block size, and threshold value is 0.5.
The present invention is based on mapping function tile remotely-sensed data and watermark information have been set up many-to-one funtcional relationship; Solved the nonsynchronous problem of watermark information; Attacking for the anti-splicing of tile data provides prerequisite, can navigate to fast and accurately based on the search mechanisms of Fibonacci method to contain the watermark image blocks, on original watermarking algorithm basis; Effectively improve the anti-attack ability of watermarking algorithm, solved tile remotely-sensed data Copyright Protection.This method strong robustness is applicable in the tile remotely-sensed data copyright protection.
Description of drawings
Fig. 1 is a kind of watermark embedding and testing process figure to the copy-right protection method of tile remotely-sensed data based on digital watermark technology of the present invention.
Fig. 2 is an original tile remotely-sensed data in the embodiment of the invention.
Fig. 3 is the watermark information that embeds in the embodiment of the invention.
Fig. 4 is a spliced tile remotely-sensed data in the embodiment of the invention.
Fig. 5 is the watermark information that extracts in the embodiment of the invention.
Fig. 6 is the watermark information that extract the splicing back in the embodiment of the invention.
Specific embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is described in further detail.
It is experimental data that present embodiment is selected single-range tile remotely-sensed data; To the reading of data, pre-service, watermark information generate, watermark embeds, moisture printing according to preserve, the whole process of search image blocks, watermark detection, testing result output; Provide one embodiment of the present of invention, further explain the present invention.
Like Fig. 2; Present embodiment selects a width of cloth tile remotely-sensed data as experimental data; Size of data is
Figure 683915DEST_PATH_IMAGE012
, and data layout is tif.
1. watermark information generates:
Step 1: import Word message to be embedded, the watermark information of present embodiment is: the watermark of lucky seal, and as shown in Figure 3.
Step 2: adopt encoding mechanism to encode the Word message of input, generate binary sequence.
Step 3: the binary sequence that spread spectrum generates, adopt all data of 1 spread spectrum, length is 1000.
Step 4: adopt disorder method, 1000 binary sequences are encrypted, obtain watermark information, be used for the watermark embedding operation.
2. watermark embeds:
Step 1: read the tile remotely-sensed data of experiment, the size of data is
Figure 19082DEST_PATH_IMAGE012
.
Step 2: obtain remote sensing image center pixel value and neighborhood window average, window size is set to
Figure 748003DEST_PATH_IMAGE013
.If center pixel value is the independent variable
Figure 826818DEST_PATH_IMAGE014
of mapping function, neighborhood window average is another independent variable
Figure 262478DEST_PATH_IMAGE015
.
Step 3: set up the mapping function of watermark bit
Figure 34125DEST_PATH_IMAGE016
and remotely-sensed data
Figure 984764DEST_PATH_IMAGE017
,
Figure 867269DEST_PATH_IMAGE018
.This mapping function should be as much as possible in last
Figure 157436DEST_PATH_IMAGE019
full mapping.
Step 4: adopt the mode that quantizes to carry out watermark and embed, travel through whole tile data and carry out the watermark embedding.
Step 5: the tile data behind the preservation embed watermark.
3. regular based on the remotely-sensed data watermark detection of Fibonacci method search mechanisms:
Step 1: read remotely-sensed data to be detected, and obtain the size
Figure 99984DEST_PATH_IMAGE020
of data to be tested.
Step 2: the watermark information that initialization detects; 1000 watermark informations all are set to 0, i.e.
Figure 537919DEST_PATH_IMAGE021
.
Step Three: Determine
Figure 958536DEST_PATH_IMAGE020
and
Figure 368789DEST_PATH_IMAGE012
the relationship between the size.If greater than, then carry out step 4, otherwise, watermark directly detected, the output result.
Step 4: carrying out the alternately watermark detection of level and vertical direction, all is to keep that big a part of image of related coefficient on both direction.
Step 5: output testing result.
Method proposed by the invention is the copy-right protection method that is directed against the tile remotely-sensed data specially; When carrying out watermark detection; Adopt the Fibonacci method search mechanisms to search for the image blocks that contains watermark; Effectively reject the influence that does not contain the watermark information image blocks, also can search the image blocks that contains watermark fast and accurately.Can find out that adopt Fibonacci method to search for the method that contains the watermark image blocks and can effectively resist the splicing attack, the robustness of watermarking algorithm also is greatly improved.
4. test and analysis
Method proposed by the invention is the water mark method that is directed against the tile remotely-sensed data specially, adopts this method can develop and realize the tile remotely-sensed data copyright protecting system based on digital watermark technology.
(1) the tile remotely-sensed data is extracted watermark
Tile remotely-sensed data behind the embed watermark is carried out watermark information extract, if tile remotely-sensed data size is for
Figure 482238DEST_PATH_IMAGE012
then directly carry out watermark information and extract.Experimental result shows that this method can be extracted watermark information accurately, and extraction ratio all is 100%.
(2) format conversion is attacked
The tif that preserves is contained the data that the watermark image saves as .bmp or .png form, and the amount of capacity of data, header file all can change, but these attacks do not change the pixel value of image, thereby can effectively extract watermark information.Experimental result shows that this method can effectively be resisted format conversion and attacked, and extraction ratio all is 100%.
(3) splicing is attacked
The tile remotely-sensed data in use; Often need splice processing; Change has all taken place in size and the relative position of splicing back remote sensing image, and watermark information does not at this moment disappear, yet the embedded location of how accurately to locate watermark information becomes the key of solution.This method is carried out the search of watermark embedded location based on Fibonacci method, can locate the position of embed watermark fast and accurately, thereby effectively extracts watermark information.The tile remotely-sensed data that four width of cloth is contained watermark is spliced, and wherein a width of cloth data do not contain watermark information, and the effect of splicing is as shown in Figure 4.Experimental result shows that splicing back watermark information still can correct extraction go out, and the extraction ratio of watermark is 100% in the experiment.

Claims (4)

  1. One kind based on digital watermark technology to the copy-right protection method of tile remotely-sensed data, it is characterized in that may further comprise the steps:
    (1) watermark information generates:
    Read significant literal;
    Convert the Word message that reads to binary sequence
    Figure 2012101394228100001DEST_PATH_IMAGE001
    according to coded system, the sequence length that is converted to is
    Figure 241741DEST_PATH_IMAGE002
    ;
    The binary sequence that generates is spread to length be
    Figure 2012101394228100001DEST_PATH_IMAGE003
    , wherein
    Figure 34248DEST_PATH_IMAGE004
    ;
    To the binary sequence scramble of spread spectrum, obtain watermark information
    Figure 2012101394228100001DEST_PATH_IMAGE005
    ;
    (2) watermark embeds:
    Confirm the embedded location of watermark information;
    Set up the many-one mapping function between watermark information position and the tile remotely-sensed data; Promptly confirm function
    Figure 813985DEST_PATH_IMAGE006
    ; Wherein,
    Figure 2012101394228100001DEST_PATH_IMAGE007
    expression watermark embeds the position, and
    Figure 146878DEST_PATH_IMAGE008
    representes remotely-sensed data gray-scale value and window Mean Parameters thereof respectively;
    Set up and embed rule; The embedded mode of watermark information can be expressed as:
    Figure 2012101394228100001DEST_PATH_IMAGE009
    ; Mapping function establishment according to setting up is located embed watermark information at pixel value
    Figure 961250DEST_PATH_IMAGE010
    , the embedding rule of
    Figure 2012101394228100001DEST_PATH_IMAGE011
    expression watermark;
    Image data behind the preservation embed watermark information;
    (3) watermark detection process:
    Read the remote sensing image data of moisture official seal breath, obtain the size of image;
    Horizontal direction to image is carried out golden section, two-part related coefficient after the difference computed segmentation, and more two-part related coefficient size keeps that big a part of image of related coefficient;
    The image blocks that retains is carried out the golden section of vertical direction, the related coefficient of two parts image after the computed segmentation respectively, more two-part related coefficient size, that big a part of image of reservation related coefficient;
    Repeat the comparison procedure of cutting apart of above level and vertical direction;
    When the facies relationship numerical value of the big partial image of related coefficient greater than pre-set threshold, or the image blocks size after cutting apart minimumly stops when dividing block size smaller or equal to predefined, and the output testing result.
  2. 2. the copy-right protection method to the tile remotely-sensed data based on digital watermark technology according to claim 1, it is characterized in that: said coded system is the reversible encoding mode.
  3. 3. the copy-right protection method to the tile remotely-sensed data based on digital watermark technology according to claim 1 is characterized in that: the said embedding rule of rule for quantizing that embed.
  4. 4. the copy-right protection method to the tile remotely-sensed data based on digital watermark technology according to claim 1, it is characterized in that: it is 256 * 256 that the minimum of said image setting is divided block size, and threshold value is 0.5.
CN2012101394228A 2012-05-08 2012-05-08 Digital watermark technology based copyright protection method orienting to remote sensing tile data Pending CN102682239A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2012101394228A CN102682239A (en) 2012-05-08 2012-05-08 Digital watermark technology based copyright protection method orienting to remote sensing tile data

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2012101394228A CN102682239A (en) 2012-05-08 2012-05-08 Digital watermark technology based copyright protection method orienting to remote sensing tile data

Publications (1)

Publication Number Publication Date
CN102682239A true CN102682239A (en) 2012-09-19

Family

ID=46814147

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2012101394228A Pending CN102682239A (en) 2012-05-08 2012-05-08 Digital watermark technology based copyright protection method orienting to remote sensing tile data

Country Status (1)

Country Link
CN (1) CN102682239A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103955634A (en) * 2014-05-15 2014-07-30 南京师范大学 Copyright protecting method based on digital watermark technology and aiming at tile remote sensing data
CN106485641A (en) * 2016-08-31 2017-03-08 南京师范大学 A kind of tile data digital watermarking based on QR code generates embedded and extracting method
CN114862646A (en) * 2022-05-10 2022-08-05 南京师范大学 Watermark embedding and extracting method and system for vector tile splicing resistance

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1808970A (en) * 2006-01-26 2006-07-26 西南交通大学 Non-uniform discrete Fourier transform based robust digital watermark method for audio
US20100017620A1 (en) * 2001-06-13 2010-01-21 Intertrust Technologies Corporation Software self-checking systems and methods
CN102156952A (en) * 2011-03-08 2011-08-17 南京师范大学 Copyright-protection-service-oriented remote sensing image digital watermarking method

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100017620A1 (en) * 2001-06-13 2010-01-21 Intertrust Technologies Corporation Software self-checking systems and methods
CN1808970A (en) * 2006-01-26 2006-07-26 西南交通大学 Non-uniform discrete Fourier transform based robust digital watermark method for audio
CN102156952A (en) * 2011-03-08 2011-08-17 南京师范大学 Copyright-protection-service-oriented remote sensing image digital watermarking method

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
任娜: "遥感影像数字水印算法研究", 《中国博士学位论文全文数据库信息科技辑》 *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103955634A (en) * 2014-05-15 2014-07-30 南京师范大学 Copyright protecting method based on digital watermark technology and aiming at tile remote sensing data
CN106485641A (en) * 2016-08-31 2017-03-08 南京师范大学 A kind of tile data digital watermarking based on QR code generates embedded and extracting method
CN106485641B (en) * 2016-08-31 2019-10-01 南京师范大学 A kind of tile data digital watermarking generation insertion and extracting method based on QR code
CN114862646A (en) * 2022-05-10 2022-08-05 南京师范大学 Watermark embedding and extracting method and system for vector tile splicing resistance
CN114862646B (en) * 2022-05-10 2024-01-30 南京师范大学 Watermark embedding and extracting method and system for vector tile anti-splicing

Similar Documents

Publication Publication Date Title
Niu et al. A survey of digital vector map watermarking
CN103310407B (en) Based on the vectorial geographical spatial data total blindness water mark method of QR code
Abubahia et al. Advancements in GIS map copyright protection schemes-a critical review
Wang et al. A high capacity reversible data hiding method for 2D vector maps based on virtual coordinates
CN103955634A (en) Copyright protecting method based on digital watermark technology and aiming at tile remote sensing data
CN106204411B (en) Vector settlement place Zero watermarking method based on not bending moment and Hilbert code
Yan et al. A normalization-based watermarking scheme for 2D vector map data
Peng et al. Blind watermarking scheme for polylines in vector geo-spatial data
Cao et al. Nonlinear scrambling-based reversible watermarking for 2D-vector maps
Parah et al. Realisation and robustness evaluation of a blind spatial domain watermarking technique
CN106485641B (en) A kind of tile data digital watermarking generation insertion and extracting method based on QR code
CN103377457B (en) A kind of vector geographic data Hard Authentication vulnerable watermark method
Bukharmetov et al. Robust method for protecting electronic document on waterway transport with steganographic means by embedding digital watermarks into images
Matheswaran et al. Image Privacy in Social Network Using Invisible Watermarking Techniques
CN102682239A (en) Digital watermark technology based copyright protection method orienting to remote sensing tile data
CN101847250B (en) Vector map data blind watermarking method based on DCT transformation
Qiu et al. A novel multi-stage watermarking scheme of vector maps
Zope-Chaudhari et al. Copyright protection of vector data using vector watermark
Wang et al. RST invariant fragile watermarking for 2D vector map authentication
CN103377458A (en) Geographic space data watermarking method based on byte streams
KR100944488B1 (en) Watermark Inserting Method to Vector data for using Azimuth Information and Watermark Detecting Method to the same
CN104103031A (en) Normalization-based vector spatial data blind watermark method
Abbas et al. Digital vector map watermarking: Applications, techniques and attacks
Wu et al. Review of digital watermarking for 2d-vector map
Zope-Chaudhari et al. Evaluation of spatial relations in watermarked geospatial data

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C02 Deemed withdrawal of patent application after publication (patent law 2001)
WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20120919