CN110489944A - Background picture generation method, device and the storage medium of information management system - Google Patents

Background picture generation method, device and the storage medium of information management system Download PDF

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Publication number
CN110489944A
CN110489944A CN201910644368.4A CN201910644368A CN110489944A CN 110489944 A CN110489944 A CN 110489944A CN 201910644368 A CN201910644368 A CN 201910644368A CN 110489944 A CN110489944 A CN 110489944A
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China
Prior art keywords
watermark
segment
picture
background
verified
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CN201910644368.4A
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牛国锋
张文锋
陈功
张楚楠
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Merchants Union Consumer Finance Co Ltd
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Merchants Union Consumer Finance Co Ltd
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Priority to CN201910644368.4A priority Critical patent/CN110489944A/en
Publication of CN110489944A publication Critical patent/CN110489944A/en
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • G06F21/10—Protecting distributed programs or content, e.g. vending or licensing of copyrighted material ; Digital rights management [DRM]
    • G06F21/106—Enforcing content protection by specific content processing
    • G06F21/1063—Personalisation
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • G06F21/10—Protecting distributed programs or content, e.g. vending or licensing of copyrighted material ; Digital rights management [DRM]
    • G06F21/16—Program or content traceability, e.g. by watermarking
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • G06F21/70—Protecting specific internal or peripheral components, in which the protection of a component leads to protection of the entire computer
    • G06F21/71—Protecting specific internal or peripheral components, in which the protection of a component leads to protection of the entire computer to assure secure computing or processing of information
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2221/00—Indexing scheme relating to security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • G06F2221/21—Indexing scheme relating to G06F21/00 and subgroups addressing additional information or applications relating to security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • G06F2221/2151—Time stamp

Abstract

This application involves a kind of background picture generation method of information management system, device, computer readable storage mediums, which comprises in log-on message management system, obtains user account and logs in the timestamp of the information management system；Watermark is generated according to the user account and the timestamp, and the watermark is encrypted；Obtain the original background picture of the information management system；Respectively to the watermark and the original background picture piecemeal, obtains identical quantity and quantity is multiple watermark segment and original background segment；The resulting watermark segment of piecemeal is respectively embedded in the original background segment；It will be embedded in the original background segment of the watermark segment, synthesizes the background picture of the information management system.Scheme provided by the present application in the background picture of information management system by adding watermark, once the information management system is compromised, can be traced to the source according to the watermark in background picture.

Description

Background picture generation method, device and the storage medium of information management system
Technical field
This application involves Internet technical fields, more particularly to a kind of background picture generation side of information management system Method, device and storage medium.
Background technique
Information management system based on WEB (World Wide Web, WWW) system is easy to operate with its, easy to maintain The features such as possess vast use groups.However, enterprise is while enjoyment information management system bring facilitates, it is also possible to It can be faced with the danger of information leakage, and be difficult to trace to the source after information leakage, for example user is in use information management system, It is taken pictures to information management system or screenshot, is then leaked out corresponding picture, even if the figure leaked out in acquisition When piece, it is also difficult to track the source of information leakage by picture obtained.
Summary of the invention
Based on this, it is necessary to aiming at the problem that being difficult to trace to the source after information leakage in information management system, provide a kind of information Background picture generation method, device and the storage medium of management system.
A kind of background picture generation method of information management system, comprising:
In log-on message management system, obtains user account and log in the timestamp of the information management system；
Watermark is generated according to the user account and the timestamp, and the watermark is encrypted；
Obtain the original background picture of the information management system；The size of the original background picture is the watermark The integral multiple of size；
Respectively to the watermark and the original background picture piecemeal, obtains identical quantity and quantity is multiple watermarks Segment and original background segment；
The resulting watermark segment of piecemeal is respectively embedded in the original background segment；
It will be embedded in the original background segment of the watermark segment, synthesizes the background picture of the information management system.
In one embodiment, described respectively to the watermark and the original background picture piecemeal, obtain identical quantity, And quantity is multiple watermark segment and original background segment, comprising:
Extract the pixel value in the original background picture in the green component of each pixel；
Each pixel value group in the green component is combined into the two-dimensional background figure for being used to indicate the original background picture Array；
Piecemeal is carried out to the watermark and the two-dimensional background figure array, obtains identical multiple watermark segments of quantity and more A two-dimensional background figure subnumber group；
Using the corresponding segment of the multiple two-dimensional background figure subnumber group as original background segment.
It is in one embodiment, described that the resulting watermark segment of piecemeal is respectively embedded in the original background segment, Include:
Fourier transformation is carried out to each original background segment respectively, obtains transformation rear backdrop segment；
According to the pixel value of the watermark segment, to the coefficient of the real part specified in the transformation rear backdrop segment into Row adjustment, the watermark segment is embedded in the original background segment；
Fourier inversion is carried out to the transformation rear backdrop segment of regulation coefficient；
Using amplitude resulting after inverse transformation as the green component as original background segment, after obtaining insertion watermark Original background segment.
In one embodiment, the method also includes:
Obtain system picture to be verified；The system picture to be verified is the information page in the shooting information management system Face carries out obtained by screenshot the information page；
Equal sized system to be verified with the original background picture is extracted from the system picture to be verified Picture；
Pixel value from the green component for extracting each pixel in the system sub-pictures to be verified；
Compare the green of the pixel value and the original background picture in the green component of the system sub-pictures to be verified Pixel value in component；The original background picture is the picture for being not embedded into watermark；
Watermark bianry image is generated according to resulting result is compared.
In one embodiment, the pixel value in the green component of the comparison system sub-pictures to be verified and described Pixel value in the green component of original background picture, comprising:
Each pixel value in the green component of the system sub-pictures to be verified is combined into two dimension array to be verified, and Each pixel value in the green component of the original background picture is combined into two-dimensional background figure array；
Piecemeal is carried out to two dimension array to be verified and the two-dimensional background figure array respectively, obtain quantity it is identical and The identical two dimension of size subnumber group to be verified and two-dimensional background figure subnumber group；
Fourier transformation is carried out to two dimension subnumber group to be verified and the two-dimensional background figure subnumber group；
To the coefficient for specifying real part in transformed two dimension subnumber group to be verified and corresponding two-dimensional background figure subnumber group It compares.
A kind of background picture generating means of information management system, described device include:
Data obtaining module obtains user account and logs in the information management system in log-on message management system Timestamp；
Watermark generation module, for generating watermark according to the user account and the timestamp, and to the watermark into Row encryption；
Original background picture obtains module, for obtaining the original background picture of the information management system；The background The size of picture is the integral multiple of the size of the watermark；
Piecemeal module, for obtaining identical quantity and quantity respectively to the watermark and the original background picture piecemeal For multiple watermark segment and original background segment；
Segment is embedded in module, for the multiple watermark segment to be successively respectively embedded in the multiple original background segment In；
Background picture composite module, it is described for each original background segment for being embedded in the multiple watermark segment to be combined into The background picture of information management system.
In one embodiment, the piecemeal module is also used to: extracting each pixel in the original background picture Pixel value in green component；Each pixel value group in the green component is combined into and is used to indicate the original background picture Two-dimensional background figure array；Piecemeal is carried out to the watermark and the two-dimensional background figure array, obtains the identical multiple watermarks of quantity Segment and multiple two-dimensional background figure subnumber groups；Using the corresponding segment of the multiple two-dimensional background figure subnumber group as original background figure Block.
In one embodiment, the segment insertion module is also used to: carrying out Fu respectively to each original background segment In leaf transformation, obtain transformation rear backdrop segment；According to the pixel value of the watermark segment, to the transformation rear backdrop segment middle finger The coefficient of fixed real part is adjusted, and the watermark segment is embedded in the original background segment；To regulation coefficient Transformation rear backdrop segment carry out Fourier inversion；Original background segment is used as using amplitude resulting after inverse transformation as described Green component, obtain insertion watermark after original background segment.
In one embodiment, described device further include: system picture to be verified obtains module, system sub-pictures to be verified Extraction module, pixel value extraction module, pixel value contrast module and watermark bianry image generation module；
System picture to be verified obtains module, for obtaining system picture to be verified；The system picture to be verified is to clap It takes the photograph information page in the information management system or the information page is carried out obtained by screenshot；
System sub-pictures extraction module to be verified, for being extracted and the original background from the system picture to be verified The equal sized system sub-pictures to be verified of picture；
Pixel value extraction module is also used to from the green component for extracting each pixel in the system sub-pictures to be verified Pixel value；
Pixel value contrast module, pixel value in green component for comparing the system sub-pictures to be verified and described Pixel value in the green component of original background picture；The original background picture is the picture for being not embedded into watermark；
Watermark bianry image generation module, for generating watermark bianry image according to the resulting result of comparison.
In one embodiment, the pixel value contrast module is also used to: by the green of the system sub-pictures to be verified Each pixel value in component is combined into two dimension array to be verified, and by each picture in the green component of the original background picture Plain value is combined into two-dimensional background figure array；Two dimension array to be verified and the two-dimensional background figure array are divided respectively Block obtains that quantity is identical and the identical two dimension of size subnumber group to be verified and two-dimensional background figure subnumber group；It is to be tested to the two dimension It demonstrate,proves subnumber group and the two-dimensional background figure subnumber group carries out Fourier transformation；To transformed two dimension subnumber group to be verified and correspondence The coefficient of real part is specified to compare in two-dimensional background figure subnumber group.
A kind of computer readable storage medium is stored with computer program, when the computer program is executed by processor, So that the processor executes the step of background picture generation method of information above management system.
A kind of computer equipment, including memory and processor, the memory are stored with computer program, the calculating When machine program is executed by the processor, so that the processor executes the background picture generation method of information above management system The step of.
Background picture generation method, device and the storage medium of above- mentioned information management system, according to user login information pipe User account and the login time stamp obtained when reason system generates watermark, then carries out to the watermark of encryption and original background picture The watermark segment of piecemeal is respectively embedded in original background segment, and then obtains the background picture of information management system by piecemeal, Therefore, even if information in the information management system by take pictures or screenshot in a manner of leak out, due to system original background figure Encrypted watermark is embedded in piece, it can be according to extracting watermark in leaked picture to find the source of information leakage. Further, since this watermark traceability is preferable, the user of use information management system can be served as a warning, so as to To reduce the probability of information leakage.
Detailed description of the invention
Fig. 1 is the applied environment figure of the background picture generation method of information management system in one embodiment；
Fig. 2 is the flow diagram of the background picture generation method of information management system in one embodiment；
Fig. 3 is flow diagram of the one embodiment to watermark and original background segment blocking step；
Fig. 4 is the flow diagram that watermark segment is embedded in original background segment step in one embodiment；
Fig. 5 is the flow diagram of the background picture generation method of information management system in one embodiment；
Fig. 6 is the flow diagram that green component method is compared in one embodiment；
Fig. 7 is the structural block diagram of the background picture generating means of information management system in one embodiment；
Fig. 8 is the structural block diagram of the background picture generating means of information management system in another embodiment；
Fig. 9 is the structural block diagram of computer equipment in one embodiment.
Specific embodiment
It is with reference to the accompanying drawings and embodiments, right in order to which the objects, technical solutions and advantages of the application are more clearly understood The application is further elaborated.It should be appreciated that specific embodiment described herein is only used to explain the application, and It is not used in restriction the application.
Fig. 1 is the applied environment figure of the background picture generation method of information management system in one embodiment.Referring to Fig.1, The background picture that the background picture generation method of the information management system is applied to information management system generates system.The message tube It includes terminal 110 and server 120 that the background picture of reason system, which generates system,.Terminal 110 and server 120 are connected by network It connects.Terminal 110 specifically can be terminal console or mobile terminal, and mobile terminal specifically can be with mobile phone, tablet computer, notebook electricity At least one of brain etc..Server 120 can use the server cluster of the either multiple server compositions of independent server To realize.
As shown in Fig. 2, in one embodiment, providing a kind of background picture generation method of information management system.This Embodiment is applied to the terminal 110 in above-mentioned Fig. 1 in this way mainly to illustrate.Reference Fig. 2, the information management system Background picture generation method specifically comprises the following steps:
S202 obtains the timestamp of user account and log-on message management system in log-on message management system.
Wherein, user account is created by the administrator of information management system, and being then assigned to corresponding user makes With；Obtained by either being applied in information management system as user.
In one embodiment, the login page of terminal display information management system can have in the login page more Kind login mode includes: input user account and user password log in, and two dimensional code barcode scanning logs in, and fingerprint recognition logs in and people Face identification logs in.When terminal uses any of the above-described kind of login mode log-on message management system, terminal obtains corresponding user The timestamp of account and log-on message management system.For example, when user uses user account and user password log-on message management When system, terminal can obtain the timestamp of user account and log-on message management system.
S204 generates watermark according to user account and timestamp, and encrypts to watermark.
Wherein, watermark generated can be the gray level image or bianry image that intensity value ranges are (0,255).Grayscale image Each pixel of picture is 8, and between 0~255, this kind of image is typically shown as from most furvous to most bright corresponding pixel value White gray scale；And each pixel of bianry image is 8, but the bit value of each of which pixel is simultaneously 0 or 1, it is corresponding Pixel value be 0 or 255, wherein 0 represent it is black, then 255 represent it is white.
In one embodiment, after the timestamp for getting user account and log-on message management system, terminal will User account and timestamp are spliced into bit string, and generate watermark according to the bit string.Then, terminal is by using encryption function Generated watermark is encrypted.
Wherein, the encryption function used can be scrambling functions, and scrambling functions include Magic Square Transformation, the change of Hilbert curve It changes, chaos sequence modulation and any one of Arnold conversion, can be the process of image scrambling to the ciphering process of watermark.Figure As scramble refers to that the image for giving a width is the mixed and disorderly nothing of a width in spatial domain or frequency domain transformation by certain transformation rule The image of chapter, to achieve the purpose that hidden image itself.During to watermark encrypting, scrambling functions can be used for multiple times By watermark scramble, and using the number of scramble as encryption key.
In one embodiment, the size of generated watermark is fixed value, which is the integer that can be 8 Times, if the size of watermark is 32 × 32, number of corresponding pixels 1024.
S206 obtains the original background picture of information management system.
Wherein, the size of original background picture is the integral multiple of watermark size.Such as watermark is having a size of 32 × 32, then obtaining The original background picture got can be 8 times of size of watermark, i.e. the size of original background picture is 256 × 256.And it is original Background picture can be solid-color image, be also possible to gray level image, and wherein solid-color image is pixel value all phases of all pixels point With color image, each tri- color of pixel R, G, B of color image is respectively 8, the pixel value of corresponding R, G, B respectively 0~ Between 255.
In one embodiment, the original background picture of information management system may is that user login information management system When, a part in the background picture that login interface is shown.Wherein, water is not embedded into the background picture which shows Print.
In one embodiment, terminal obtains the background picture that login interface is shown, and the back shown from the login interface The image-region that target size size is intercepted in scape picture, using the image-region of the target size size as information management system Original background picture.Wherein, which is the integral multiple of watermark size.
S208 obtains identical quantity and quantity is multiple watermark segments respectively to watermark and original background picture piecemeal With original background segment.
Wherein, the size for each watermark segment got is identical, and does not cover mutually between watermark segment.Each There can be one or more pixel in watermark segment.The size of each original background segment is also identical, and original back It is not covered mutually between scape segment, can have multiple pixels in each original background segment.Correspondingly, the ruler of original background segment The very little integral multiple that can be watermark size.
In one embodiment, original background picture be solid-color image, as shown in figure 3, S208 specifically includes the following steps:
S302 extracts the pixel value in original background picture in the green component of each pixel.
Wherein, the pixel value in green component refers to that each pixel tri- Color Channel Greens of corresponding R, G, B are logical The pixel value of road G can be calculate by the following formula:
Wherein, g represents green pixel values, and i represents the i-th bit of pixel, biRepresent the value of i-th bit, wherein each Value is 0 or 1.
Each pixel value group in green component is combined into the two-dimensional background figure number for being used to indicate original background picture by S304 Group.
In one embodiment, terminal is in each pixel value replacement original background picture in calculated green component The pixel value of each pixel, can be generated the corresponding gray level image of original background picture, and by the ash of original background picture Degree image is indicated with two-dimensional array, that is, generates the two-dimensional background figure array for indicating original background picture.
S306 carries out piecemeal to watermark and two-dimensional background figure array, obtains identical multiple watermark segments of quantity and multiple Two-dimensional background figure subnumber group.
S308, using the corresponding segment of multiple two-dimensional background figure subnumber groups as original background segment.
In one embodiment, terminal is first to watermark piecemeal, obtained multiple watermark segments, each watermark segment it is big Small is 1 pixel.Then piecemeal is carried out to the corresponding two-dimensional background figure array of original background picture, obtains multiple two-dimensional backgrounds Figure subnumber group, using the corresponding subgraph block of each two-dimensional background figure subnumber group as original background segment, each original background segment In have multiple pixels.For example, a watermark and a size for indicating original background picture having a size of 32 × 32 are Watermark, is divided into 1 × 1 watermark segment by 256 × 256 two-dimensional background figure array, obtains 1024 watermark segments.It is corresponding, 256 × 256 two-dimensional background figure array is divided into 8 × 8 two-dimensional background figure subnumber group, and corresponding quantity is 1024, and this Corresponding 1024 8 × 8 original background segments of 1024 two-dimensional background figure subnumber groups.
In above-described embodiment, terminal is by extracting the pixel in original background picture in the green component of each pixel Value, and the pixel value in green component is combined into the two-dimensional background figure array for being used to indicate original background picture, then to water Print and two-dimensional background figure array carry out piecemeal, obtain identical quantity and quantity be multiple watermark segment and original background figure Block, so that watermark segment and original background segment (two-dimensional background figure array) can correspond, in order to embed a watermark into original In beginning background picture.
The resulting watermark segment of piecemeal is respectively embedded in original background segment by S210.
In one embodiment, the corresponding relationship based on each watermark segment and original background segment, by each watermark figure Block is respectively embedded into corresponding original background segment.
In one embodiment, terminal is by the resulting watermark segment of piecemeal and original background segment, according to one-to-one Relationship is numbered respectively, and such as the corresponding original background segment 1 of watermark segment 1, watermark segment 2 corresponds to original background segment 2, according to this Analogize, obtains the number of each watermark segment and original background segment.Then watermark segment is embedded into corresponding original according to number In beginning background segment.
In one embodiment, as shown in figure 4, S210 can specifically include following steps:
S402 carries out Fourier transformation to each original background segment respectively, obtains transformation rear backdrop segment.
In different research fields, Fourier transformation has a variety of different variant forms, such as continuous fourier transform (Continuous Fourier Transform, CFT) and discrete Fourier transform (Discrete Fourier Transform, DFT).Wherein discrete fourier change is that discrete form is all presented in Fourier transformation in time domain and frequency domain, will The sampling transformation of time-domain signal be discrete time Fourier transform (Discrete Time Fourier Transform, DTFT) the sampling of frequency domain.During image processing, image data can be transformed from the time domain to frequency by discrete Fourier transform The distributed function of image is transformed to the frequency distribution function of image by domain.
Wherein, Fourier transformation is carried out respectively to each original background segment to refer to each original background segment two-dimensional background figure Subnumber group carries out Fourier transformation, correspondingly, transformation rear backdrop segment is exactly two-dimensional background figure subnumber group after transformation.
In one embodiment, the corresponding two-dimensional background figure subnumber group of original background segment is carried out fast Fourier by terminal It converts (Fast Fourier Transformation, FFT), obtains transformation rear backdrop segment, accordingly, available transformation Two-dimensional background figure subnumber group afterwards.Wherein, Fast Fourier Transform (FFT) using the twiddle factor in discrete Fourier transform periodicity, Symmetry, reducibility etc., reduce operand.
S404 carries out the coefficient for the real part specified in transformation rear backdrop segment according to the pixel value of watermark segment Watermark segment is embedded in original background segment by adjustment.
Wherein, specified real part refers to: according to what is specified in watermark segment after the conversion two-dimensional background figure subnumber group Embedded coordinate determines that the corresponding middle low frequency real part of two-dimensional background figure subnumber group after transformation, identified real part are Above-mentioned specified real part.Coefficient is adjusted and can be one constant of increase on the basis of former coefficient, or is kept Former coefficient is constant.
In one embodiment, terminal to the coefficient of the middle low frequency real part after transformation in two-dimensional background figure subnumber group into Watermark segment, is embedded in original background segment by row modification to realize.Such as two-dimentional after each transformation having a size of 8 × 8 Background subnumber group, by the position record 1bit water of two-dimensional background figure subnumber chunking the third line, third column (3,3) after each transformation Official seal breath.
As an example, the size of each watermark segment is 1 × 1, two-dimensional background figure array size after each transformation It is 8 × 8.Wherein the third line third of two-dimensional background figure subnumber group arranges after the specified insertion transformation of watermark segment, and coordinate is (3,3), The corresponding middle low frequency real part of two-dimensional background figure subnumber group after converting can be then found out according to coordinate.Then according to watermark segment The pixel value of middle pixel, the coefficient of the corresponding middle low frequency real part of two-dimensional background figure subnumber group after adjustment transformation.Work as watermark When the pixel value of pixel is 255 in segment, by corresponding middle low frequency real part in two-dimensional background figure subnumber group after transformation Coefficient increases a constant；When the pixel value of pixel in watermark segment be 0 when, by after transformation in two-dimensional background figure subnumber group it is right The coefficient for the middle low frequency real part answered remains unchanged.Or when the pixel value of pixel in watermark segment is 0, after transformation The coefficient of corresponding middle low frequency real part in two-dimensional background figure subnumber group increases a constant；When pixel in watermark segment When pixel value is 255, by the coefficient of corresponding middle low frequency real part remains unchanged in two-dimensional background figure subnumber group after transformation.
S406 carries out Fourier inversion to the transformation rear backdrop segment of regulation coefficient.
S408, using amplitude resulting after inverse transformation as the green component of original background segment, after obtaining insertion watermark Original background segment.
Wherein, Fourier inversion is the inverse transformation of Fourier transformation, and during image processing, its effect is will to believe Number from frequency-domain transform to time domain, i.e., the frequency distribution function of image is transformed to distributed function.Amplitude, which can be, indicates embedding The function amplitude of original background segment after entering watermark.
In one embodiment, terminal carries out Fu to two-dimensional background figure subnumber group after adjusted transformation of coefficient excessively respectively In leaf inverse transformation, obtain indicate insertion watermark after original background segment function.Then by function width resulting after inverse transformation It is worth the green component as original background segment, the original background segment after obtaining insertion watermark.Wherein it is embedded in the original after watermark Beginning background segment can be gray level image.
In one embodiment, terminal is using function amplitude resulting after inverse transformation as original background segment green component Pixel value, and combine the pixel value of green component with the pixel value of other components, the original background figure after obtaining insertion watermark Block.Original background segment after being wherein embedded in watermark can be solid-color image.
S212 will be embedded in the original background segment of watermark segment, the background picture of composite signal management system.
In one embodiment, the original background segment for being embedded in watermark segment is combined into and original background figure by terminal first Chip size is equal, is embedded in the original background picture of watermark, and the original background picture for being embedded in watermark is then passed through the side of tiling Formula generates a Zhang great Tu, and is applied to information management system using the big figure as background picture.For example, original background dimension of picture It is 256 × 256, the original background segment quantity of insertion watermark segment is 1024, having a size of 8 × 8, is then embedded in this 1024 Having a size of 256 × 256 original background picture for being embedded in watermark, then again the original background segment of watermark segment is combined into one The original background picture of 256 × 256 insertion watermark is generated into a Zhang great Tu by way of tiling, and using the big figure as back Scape picture is applied to information management system.
In above-described embodiment, the user account and login time obtained when terminal is according to user login information management system is stabbed Watermark is generated, piecemeal then is carried out to the watermark of encryption and original background picture, the watermark segment of piecemeal is respectively embedded in original In beginning background segment, and then obtain the background picture of information management system, therefore, even if information in the information management system with It takes pictures or the mode of screenshot leaks out, it, can be according to institute due to being embedded in encrypted watermark in system original background picture Watermark is extracted in leakage picture to find the source of information leakage.Further, since this watermark traceability is preferable, it can be right The user of use information management system serves as a warning, so as to reduce the probability of information leakage.
In one embodiment, as shown in figure 5, the background picture generation method of the information management system can also include with Lower step:
S502 obtains system picture to be verified；System picture to be verified be information page in photographing information management system, Or information page is carried out obtained by screenshot.
Wherein, system picture to be verified can be user after using user account log-on message management system, shooting Information page in information management system carries out then picture that screenshot is leaked out to information page, and to be verified System picture contains at least one complete watermark.
S504 extracts the equal sized system subgraph to be verified with original background picture from system picture to be verified Piece.
Wherein, no-watermark in original background picture.If system dimension of picture to be verified is identical as original background dimension of picture, Terminal is then directly using system picture to be verified as system sub-pictures to be verified.If system dimension of picture to be verified is greater than original back Scape picture, terminal then intercept part picture to be verified as system sub-pictures to be verified.Wherein system sub-pictures to be verified include One complete watermark.If can be intercepted in system picture to be verified it is multiple include a complete watermark picture, select As system sub-pictures to be verified, wherein white space is larger refers on system sub-pictures to be verified the biggish picture of white space The region covered by text or other contents is less.
S506, the pixel value from the green component for extracting each pixel in system sub-pictures to be verified.
S508 compares the green component of the pixel value and original background picture in the green component of system sub-pictures to be verified In pixel value；Original background picture is the picture for being not embedded into watermark.
Terminal can be according to formula:
Calculate the pixel value of the corresponding green channel of each pixel in system sub-pictures to be verified.In original background picture Green component in pixel value can be it is calculated in insertion watermarking process, be also possible to calculate during the extraction process and It obtains.
In one embodiment, as shown in fig. 6, S508 can specifically include following steps:
Each pixel value in the green component of system sub-pictures to be verified is combined into two dimension array to be verified by S602, with And each pixel value in the green component of original background picture is combined into two-dimensional background figure array.
In one embodiment, terminal is by pixel value in the green component of calculated verifying system sub-pictures and original Pixel value in the green component of background picture replaces the pixel value of each pixel of system sub-pictures to be verified and original respectively The pixel value of each pixel of background picture, is indicated with two-dimensional array respectively, that is, is generated for indicating system sub-pictures to be verified Two dimension array to be verified and indicate the two-dimensional background figure array of original background picture.
S604 carries out piecemeal to two dimension array to be verified and two-dimensional background figure array respectively, obtains that quantity is identical and size Identical two dimension subnumber group to be verified and two-dimensional background figure subnumber group.
Terminal carries out piecemeal to two dimension array to be verified, obtains multiple two dimensions subnumber group to be verified, and each two dimension is to be tested The corresponding subgraph block of subnumber group is demonstrate,proved as system subgraph block to be verified, there are multiple pixels in each system subgraph block to be verified. Wherein the quantity of two-dimentional subnumber group to be verified and size are identical to the piecemeal acquired results of original background picture with telescopiny. Piecemeal is carried out to two-dimensional background figure array, obtains multiple two-dimensional background figure subnumber groups, each two-dimensional background figure subnumber group is corresponding Subgraph block as original background segment, the wherein quantity of two-dimensional background figure subnumber group and size and two dimension subnumber group phase to be verified Together.
S606 carries out Fourier transformation to two dimension subnumber group to be verified and two-dimensional background figure subnumber group；
S608, to specified real part in transformed two dimension subnumber group to be verified and corresponding two-dimensional background figure subnumber group Coefficient compares.
Terminal carries out Fourier transformation, obtained transformation to two dimension subnumber group to be verified and two-dimensional background figure subnumber group respectively Two-dimentional subnumber group to be verified and two-dimensional background figure subnumber group after transformation afterwards.Then basis is in watermark telescopiny, watermark segment It is specified in two-dimensional background figure subnumber group after corresponding transformation with the corresponding relationship and watermark segment of original background segment embedding Enter coordinate, determines two dimension subnumber group to be verified middle low frequency corresponding with two-dimensional background figure subnumber group coordinate points after transformation after transformation Then real part compares the coefficient value of two middle low frequency real parts.
In above-described embodiment, terminal by each pixel value in the green component of system sub-pictures to be verified be combined into two dimension to Array is verified, and each pixel value in the green component of original background picture is combined into two-dimensional background figure array, is then divided It is other that piecemeal is carried out to two dimension array to be verified and two-dimensional background figure array, obtain that quantity is identical and the identical two dimension of size is to be tested Subnumber group and two-dimensional background figure subnumber group are demonstrate,proved, and Fourier's change is carried out to two dimension subnumber group to be verified and two-dimensional background figure subnumber group It changes, so as to the position being embedded according to watermark, finds transformed two dimension subnumber group to be verified and corresponding two-dimensional background figure Real part is specified in array, and real to specifying in transformed two dimension subnumber group to be verified and corresponding two-dimensional background figure subnumber group The coefficient of number part compares, to extract watermark.
S510 generates watermark bianry image according to resulting result is compared.
In one embodiment, if two dimension subnumber group to be verified is corresponding with two-dimensional background figure subnumber group after transformation after transformation The coefficient value of middle low frequency real part is identical, and terminal is then back to watermark array to be verified for 0；If two dimension son to be verified after transformation The coefficient value of array middle low frequency real part corresponding with two-dimensional background figure subnumber group after transformation is not identical, and terminal is then returned 1 To watermark array to be verified.By corresponding with two-dimensional background figure subnumber group after transformation to two dimension subnumber group to be verified after each transformation The coefficient of middle low frequency real part compare, and corresponding value is returned to according to comparing result and arrives watermark array to be verified, from And a watermark array to be verified is generated, watermark bianry image is then generated according to watermark array to be verified.
In one embodiment, after generating watermark bianry image, terminal is by using decryption function to watermark two-value Image is handled, and watermark information string can be obtained.Wherein decryption function can be the inverse function of encryption function.If encryption function Scrambling functions, and to the multiple scramble of watermark in ciphering process, then using in ciphering process to the number of watermark scramble as solution Close key pair watermark bianry image is decrypted, and obtains watermark information string.
In above-described embodiment, terminal passes through the green component extracted in system picture and original background picture to be verified, and Green component is compared, to generate watermark bianry image, can further extract watermark information string.To when letter When breath management system is compromised, system operator can extract watermark from being compromised in picture, find information leakage Source.
Fig. 2-6 is the flow diagram of the background picture generation method of information management system in one embodiment.It should manage Solution, although each step in the flow chart of Fig. 2-6 successively shows that these steps are not according to the instruction of arrow The inevitable sequence according to arrow instruction successively executes.Unless expressly stating otherwise herein, there is no tight for the execution of these steps The sequence of lattice limits, these steps can execute in other order.Moreover, at least part step in Fig. 2-6 can wrap Include multiple sub-steps perhaps these sub-steps of multiple stages or stage be not necessarily execute completion in synchronization, but It can execute at different times, the execution in these sub-steps or stage sequence, which is also not necessarily, successively to be carried out, but can be with It is executed in turn or alternately at least part of the sub-step or stage of other steps or other steps.
In one embodiment, as shown in fig. 7, providing a kind of background picture generating means of information management system, dress Setting includes: data obtaining module 702, watermark generation module 704, and original background picture obtains module 706, piecemeal module 708, figure Block is embedded in module 710, background picture composite module 712；Wherein:
Data obtaining module 702 obtains user account and log-on message management system in log-on message management system Timestamp；
Watermark generation module 704 for generating watermark according to user account and timestamp, and encrypts watermark；
Original background picture obtains module 706, for obtaining the original background picture of information management system；Original background figure The size of piece is the integral multiple of the size of watermark；
Piecemeal module 708, for by watermark and original background picture piecemeal, to identical quantity and quantity to be multiple water Impression block and original background segment；
Segment is embedded in module 710, and the resulting watermark segment of piecemeal is respectively embedded in original background segment；
Background picture composite module 712 will be embedded in the original background segment of watermark segment, the back of composite signal management system Scape picture.
In one embodiment, piecemeal module 708 is also used to:
Extract the pixel value in original background picture in the green component of each pixel；
Each pixel value group in green component is combined into the two-dimensional background figure array for being used to indicate original background picture；
Piecemeal is carried out to watermark and two-dimensional background figure array, obtains the identical multiple watermark segments of quantity and multiple two dimension back Scape figure subnumber group；
Using the corresponding segment of multiple two-dimensional background figure subnumber groups as original background segment.
In one embodiment, segment insertion module 710 is also used to:
Fourier transformation is carried out to each original background segment respectively, obtains transformation rear backdrop segment；
According to the pixel value of watermark segment, the coefficient for the real part specified in transformation rear backdrop segment is adjusted, Watermark segment to be embedded in original background segment；
Fourier inversion is carried out to the transformation rear backdrop segment of regulation coefficient；
Original back using amplitude resulting after inverse transformation as the green component of original background segment, after obtaining insertion watermark Scape segment.
In above-described embodiment, user account and the login time stamp obtained when according to user login information management system is generated Then watermark carries out piecemeal to the watermark of encryption and original background picture, the watermark segment of piecemeal is respectively embedded in original back In scape segment, and then the background picture of information management system is obtained, therefore, even if the information in the information management system is to take pictures Or the mode of screenshot leaks out, it, can be according to being leaked due to being embedded in encrypted watermark in system original background picture Watermark is extracted in picture to find the source of information leakage.It, can be to using further, since this watermark traceability is preferable The user of information management system serves as a warning, so as to reduce the probability of information leakage.
In one embodiment, as shown in figure 8, the device can also include: that system picture to be verified obtains module 714, System sub-pictures extraction module 716 to be verified, pixel value extraction module 718, pixel value contrast module 720, watermark bianry image Generation module 722；Wherein:
System picture to be verified obtains module 714, for obtaining system picture to be verified；System picture to be verified is shooting Information page in information management system carries out obtained by screenshot information page；
System sub-pictures extraction module 716 to be verified, for being extracted and original background picture from system picture to be verified Equal sized system sub-pictures to be verified；
Pixel value extraction module 718, for from the green component for extracting each pixel in system sub-pictures to be verified Pixel value；
Pixel value contrast module 720, pixel value in green component for comparing system sub-pictures to be verified and original Pixel value in the green component of background picture；Original background picture is the picture for being not embedded into watermark；
Watermark bianry image generation module 722, for generating watermark bianry image according to the resulting result of comparison.
In above-described embodiment, by extracting the green component in system picture and original background picture to be verified, and to green Colouring component compares, to generate watermark bianry image, can further extract watermark information string.To work as message tube When reason system is compromised, system operator can extract watermark from being compromised in picture, find the source of information leakage.
In one embodiment, pixel value contrast module 720 is also used to:
Each pixel value in the green component of system sub-pictures to be verified is combined into two dimension array to be verified, and will be former Each pixel value in the green component of beginning background picture is combined into two-dimensional background figure array；
Piecemeal is carried out to two dimension array to be verified and two-dimensional background figure array respectively, obtains that quantity is identical and size is identical Two dimension subnumber group to be verified and two-dimensional background figure subnumber group；
Fourier transformation is carried out to two dimension subnumber group to be verified and two-dimensional background figure subnumber group；
To the coefficient for specifying real part in transformed two dimension subnumber group to be verified and corresponding two-dimensional background figure subnumber group It compares.
In above-described embodiment, terminal by each pixel value in the green component of system sub-pictures to be verified be combined into two dimension to Array is verified, and each pixel value in the green component of original background picture is combined into two-dimensional background figure array, is then divided It is other that piecemeal is carried out to two dimension array to be verified and two-dimensional background figure array, obtain that quantity is identical and the identical two dimension of size is to be tested Subnumber group and two-dimensional background figure subnumber group are demonstrate,proved, and Fourier's change is carried out to two dimension subnumber group to be verified and two-dimensional background figure subnumber group It changes, so as to the position being embedded according to watermark, finds transformed two dimension subnumber group to be verified and corresponding two-dimensional background figure Real part is specified in array, and real to specifying in transformed two dimension subnumber group to be verified and corresponding two-dimensional background figure subnumber group The coefficient of number part compares, to extract watermark.
Fig. 9 shows the internal structure chart of computer equipment in one embodiment.The computer equipment specifically can be Fig. 1 In terminal 110 (or server 120).As shown in figure 9, it includes total by system that the computer equipment, which includes the computer equipment, Processor, memory, network interface, input unit and the display screen of line connection.Wherein, memory includes that non-volatile memories are situated between Matter and built-in storage.The non-volatile memory medium of the computer equipment is stored with operating system, can also be stored with computer journey Sequence when the computer program is executed by processor, may make processor to realize the background picture generation method of information management system. Computer program can also be stored in the built-in storage, when which is executed by processor, processor may make to execute The background picture generation method of information management system.The display screen of computer equipment can be liquid crystal display or electric ink Display screen, the input unit of computer equipment can be the touch layer covered on display screen, be also possible to computer equipment shell Key, trace ball or the Trackpad of upper setting can also be external keyboard, Trackpad or mouse etc..
It will be understood by those skilled in the art that structure shown in Fig. 9, only part relevant to application scheme is tied The block diagram of structure does not constitute the restriction for the computer equipment being applied thereon to application scheme, specific computer equipment It may include perhaps combining certain components or with different component layouts than more or fewer components as shown in the figure.
In one embodiment, the background picture generation method device of information management system provided by the present application may be implemented For a kind of form of computer program, computer program can be run in computer equipment as shown in Figure 9.Computer equipment The each program module for forming the background picture generation method device of the information management system can be stored in memory, for example, Fig. 7 Shown in data obtaining module 702, watermark generation module 704, original background picture obtain module 706, piecemeal module 708, figure Block is embedded in module 710, background picture composite module 712.The computer program that each program module is constituted executes processor Step in the background picture generation method of the information management system of each embodiment of the application described in this specification.
For example, computer equipment shown in Fig. 9 can be generated by the background picture of information management system as shown in Figure 7 Data obtaining module 702 in square law device executes S202.Computer equipment can execute S204 by watermark generation module 704. Computer equipment can obtain module 706 by original background picture and execute S206.Computer equipment can be held by piecemeal module 708 Row S208.Computer equipment can be embedded in module 710 by segment and execute S210.Computer equipment can pass through background picture combination die Block 712 executes S212.
In one embodiment, a kind of computer equipment, including memory and processor are provided, memory is stored with meter Calculation machine program, when computer program is executed by processor, so that processor executes following steps: in log-on message management system When, obtain the timestamp of user account and log-on message management system；Watermark is generated according to user account and timestamp, and to water Print is encrypted；Obtain the original background picture of information management system；The size of original background picture is the whole of the size of watermark Several times；Respectively to watermark and original background picture piecemeal, obtains identical quantity and quantity is multiple watermark segment and original back Scape segment；The resulting watermark segment of piecemeal is respectively embedded in original background segment；The original background of watermark segment will be embedded in Segment, the background picture of composite signal management system.
In one embodiment, computer program is executed by processor respectively to watermark and original background picture piecemeal, is obtained To identical quantity and when quantity is the step of multiple watermark segment and original background segment so that processing implement body execute with Lower step: the pixel value in original background picture in the green component of each pixel is extracted；By each pixel in green component Value group is combined into the two-dimensional background figure array for indicating original background picture；Piecemeal is carried out to watermark and two-dimensional background figure array, Obtain the identical multiple watermark segments of quantity and multiple two-dimensional background figure subnumber groups；Multiple two-dimensional background figure subnumber groups are corresponding Segment is as original background segment.
In one embodiment, computer program, which is executed by processor, is respectively embedded in original for the resulting watermark segment of piecemeal When step in beginning background segment, so that processing implement body executes following steps: being carried out in Fu respectively to each original background segment Leaf transformation obtains transformation rear backdrop segment；According to the pixel value of watermark segment, to the real part specified in transformation rear backdrop segment The coefficient divided is adjusted, and watermark segment is embedded in original background segment；To the transformation rear backdrop segment of regulation coefficient into Row Fourier inversion；Using amplitude resulting after inverse transformation as the green component of original background segment, after obtaining insertion watermark Original background segment.
In one embodiment, when computer program is executed by processor, so that processor also executes following steps:
Obtain system picture to be verified；System picture to be verified is the information page or right in photographing information management system Information page carries out obtained by screenshot；The equal sized system to be verified with original background picture is extracted from system picture to be verified System sub-pictures；Pixel value from the green component for extracting each pixel in system sub-pictures to be verified；Compare system to be verified Pixel value in the green component of sub-pictures and the pixel value in the green component of original background picture；Original background picture is not It is embedded in the picture of watermark；Watermark bianry image is generated according to resulting result is compared.
In one embodiment, computer program is executed by processor in the green component for comparing system sub-pictures to be verified Pixel value and original background picture green component in pixel value step when so that processing implement body executes following step It is rapid: each pixel value in the green component of system sub-pictures to be verified to be combined into two dimension array to be verified, and by original back Each pixel value in the green component of scape picture is combined into two-dimensional background figure array；Two dimension array to be verified and two dimension are carried on the back respectively Scape figure array carries out piecemeal, obtains that quantity is identical and the identical two dimension of size subnumber group to be verified and two-dimensional background figure subnumber group； Fourier transformation is carried out to two dimension subnumber group to be verified and two-dimensional background figure subnumber group；To transformed two dimension subnumber group to be verified The coefficient of real part is specified to compare in corresponding two-dimensional background figure subnumber group.
In one embodiment, a kind of computer readable storage medium is provided, computer program, computer journey are stored with When sequence is executed by processor, so that processor executes following steps: in log-on message management system, obtaining user account and step on Record the timestamp of information management system；Watermark is generated according to user account and timestamp, and watermark is encrypted；Obtain information The original background picture of management system；The size of original background picture is the integral multiple of the size of watermark；Respectively to watermark and original Beginning background picture piecemeal, obtains identical quantity and quantity is multiple watermark segment and original background segment；Piecemeal is resulting Watermark segment is respectively embedded in original background segment；The original background segment of watermark segment, composite signal management system will be embedded in The background picture of system.
In one embodiment, computer program is executed by processor respectively to watermark and original background picture piecemeal, is obtained To identical quantity and when quantity is the step of multiple watermark segment and original background segment so that processing implement body execute with Lower step: the pixel value in original background picture in the green component of each pixel is extracted；By each pixel in green component Value group is combined into the two-dimensional background figure array for indicating original background picture；Piecemeal is carried out to watermark and two-dimensional background figure array, Obtain the identical multiple watermark segments of quantity and multiple two-dimensional background figure subnumber groups；Multiple two-dimensional background figure subnumber groups are corresponding Segment is as original background segment.
In one embodiment, computer program, which is executed by processor, is respectively embedded in original for the resulting watermark segment of piecemeal When step in beginning background segment, so that processing implement body executes following steps: being carried out in Fu respectively to each original background segment Leaf transformation obtains transformation rear backdrop segment；According to the pixel value of watermark segment, to the real part specified in transformation rear backdrop segment The coefficient divided is adjusted, and watermark segment is embedded in original background segment；To the transformation rear backdrop segment of regulation coefficient into Row Fourier inversion；Using amplitude resulting after inverse transformation as the green component of original background segment, after obtaining insertion watermark Original background segment.
In one embodiment, when computer program is executed by processor, so that processor also executes following steps:
Obtain system picture to be verified；System picture to be verified is the information page or right in photographing information management system Information page carries out obtained by screenshot；The equal sized system to be verified with original background picture is extracted from system picture to be verified System sub-pictures；Pixel value from the green component for extracting each pixel in system sub-pictures to be verified；Compare system to be verified Pixel value in the green component of sub-pictures and the pixel value in the green component of original background picture；Original background picture is not It is embedded in the picture of watermark；Watermark bianry image is generated according to resulting result is compared.
In one embodiment, computer program is executed by processor in the green component for comparing system sub-pictures to be verified Pixel value and original background picture green component in pixel value step when so that processing implement body executes following step It is rapid: each pixel value in the green component of system sub-pictures to be verified to be combined into two dimension array to be verified, and by original back Each pixel value in the green component of scape picture is combined into two-dimensional background figure array；Two dimension array to be verified and two dimension are carried on the back respectively Scape figure array carries out piecemeal, obtains that quantity is identical and the identical two dimension of size subnumber group to be verified and two-dimensional background figure subnumber group； Fourier transformation is carried out to two dimension subnumber group to be verified and two-dimensional background figure subnumber group；To transformed two dimension subnumber group to be verified The coefficient of real part is specified to compare in corresponding two-dimensional background figure subnumber group.
Those of ordinary skill in the art will appreciate that realizing all or part of the process in above-described embodiment method, being can be with Relevant hardware is instructed to complete by computer program, the program can be stored in a non-volatile computer and can be read In storage medium, the program is when being executed, it may include such as the process of the embodiment of above-mentioned each method.Wherein, provided herein Each embodiment used in any reference to memory, storage, database or other media, may each comprise non-volatile And/or volatile memory.Nonvolatile memory may include that read-only memory (ROM), programming ROM (PROM), electricity can be compiled Journey ROM (EPROM), electrically erasable ROM (EEPROM) or flash memory.Volatile memory may include random access memory (RAM) or external cache.By way of illustration and not limitation, RAM is available in many forms, such as static state RAM (SRAM), dynamic ram (DRAM), synchronous dram (SDRAM), double data rate sdram (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronization link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) directly RAM (RDRAM), straight Connect memory bus dynamic ram (DRDRAM) and memory bus dynamic ram (RDRAM) etc..
Each technical characteristic of above embodiments can be combined arbitrarily, for simplicity of description, not to above-described embodiment In each technical characteristic it is all possible combination be all described, as long as however, the combination of these technical characteristics be not present lance Shield all should be considered as described in this specification.
The several embodiments of the application above described embodiment only expresses, the description thereof is more specific and detailed, but simultaneously The limitation to the application the scope of the patents therefore cannot be interpreted as.It should be pointed out that for those of ordinary skill in the art For, without departing from the concept of this application, various modifications and improvements can be made, these belong to the guarantor of the application Protect range.Therefore, the scope of protection shall be subject to the appended claims for the application patent.

Claims (10)

1. a kind of background picture generation method of information management system, comprising:
In log-on message management system, obtains user account and log in the timestamp of the information management system；
Watermark is generated according to the user account and the timestamp, and the watermark is encrypted；
Obtain the original background picture of the information management system；The size of the original background picture is the size of the watermark Integral multiple；
Respectively to the watermark and the original background picture piecemeal, obtains identical quantity and quantity is multiple watermark segments With original background segment；
The resulting watermark segment of piecemeal is respectively embedded in the original background segment；
It will be embedded in the original background segment of the watermark segment, synthesizes the background picture of the information management system.
2. the method according to claim 1, wherein described respectively to the watermark and the original background picture Piecemeal, obtains identical quantity and quantity is multiple watermark segment and original background segment, comprising:
Extract the pixel value in the original background picture in the green component of each pixel；
Each pixel value group in the green component is combined into the two-dimensional background figure array for being used to indicate the original background picture；
Piecemeal is carried out to the watermark and the two-dimensional background figure array, obtains the identical multiple watermark segments of quantity and multiple two Tie up Background subnumber group；
Using the corresponding segment of the multiple two-dimensional background figure subnumber group as original background segment.
3. the method according to claim 1, wherein described be respectively embedded in institute for the resulting watermark segment of piecemeal It states in original background segment, comprising:
Fourier transformation is carried out to each original background segment respectively, obtains transformation rear backdrop segment；
According to the pixel value of the watermark segment, the coefficient for the real part specified in the transformation rear backdrop segment is adjusted It is whole, the watermark segment is embedded in the original background segment；
Fourier inversion is carried out to the transformation rear backdrop segment of regulation coefficient；
Original using amplitude resulting after inverse transformation as the green component as original background segment, after obtaining insertion watermark Beginning background segment.
4. the method according to claim 1, wherein the method also includes:
Obtain system picture to be verified；The system picture to be verified be information page in the shooting information management system, Or the information page is carried out obtained by screenshot；
The equal sized system sub-pictures to be verified with the original background picture are extracted from the system picture to be verified；
Pixel value from the green component for extracting each pixel in the system sub-pictures to be verified；
Compare the green component of the pixel value and the original background picture in the green component of the system sub-pictures to be verified In pixel value；The original background picture is the picture for being not embedded into watermark；
Watermark bianry image is generated according to resulting result is compared.
5. according to the method described in claim 4, it is characterized in that, the green point of the comparison system sub-pictures to be verified Pixel value in amount and the pixel value in the green component of the original background picture, comprising:
Each pixel value in the green component of the system sub-pictures to be verified is combined into two dimension array to be verified, and by institute It states each pixel value in the green component of original background picture and is combined into two-dimensional background figure array；
Piecemeal is carried out to two dimension array to be verified and the two-dimensional background figure array respectively, obtains that quantity is identical and size Identical two dimension subnumber group to be verified and two-dimensional background figure subnumber group；
Fourier transformation is carried out to two dimension subnumber group to be verified and the two-dimensional background figure subnumber group；
Coefficient progress to real part is specified in transformed two dimension subnumber group to be verified and corresponding two-dimensional background figure subnumber group Comparison.
6. a kind of background picture generating means of information management system, which is characterized in that described device includes:
Data obtaining module, in log-on message management system, obtain user account and log in the information management system when Between stab；
Watermark generation module for generating watermark according to the user account and the timestamp, and adds the watermark It is close；
Original background picture obtains module, for obtaining the original background picture of the information management system；The background picture Size be the watermark size integral multiple；
Piecemeal module, for obtaining identical quantity and quantity being more respectively to the watermark and the original background picture piecemeal A watermark segment and original background segment；
Segment is embedded in module, for the multiple watermark segment to be successively respectively embedded in the multiple original background segment；
Background picture composite module, for each original background segment for being embedded in the multiple watermark segment to be combined into the information The background picture of management system.
7. device according to claim 6, which is characterized in that the piecemeal module is also used to:
Extract the pixel value in the original background picture in the green component of each pixel；
Each pixel value group in the green component is combined into the two-dimensional background figure array for being used to indicate the original background picture；
Piecemeal is carried out to the watermark and the two-dimensional background figure array, obtains the identical multiple watermark segments of quantity and multiple two Tie up Background subnumber group；
Using the corresponding segment of the multiple two-dimensional background figure subnumber group as original background segment.
8. device according to claim 6, which is characterized in that described device further include:
System picture to be verified obtains module, for obtaining system picture to be verified；The system picture to be verified is shooting institute It states the information page in information management system or the information page is carried out obtained by screenshot；
System sub-pictures extraction module to be verified, for being extracted and the original background picture from the system picture to be verified Equal sized system sub-pictures to be verified；
Pixel value extraction module, the picture being also used to from the green component for extracting each pixel in the system sub-pictures to be verified Element value；
Pixel value contrast module, pixel value in green component for comparing the system sub-pictures to be verified and described original Pixel value in the green component of background picture；The original background picture is the picture for being not embedded into watermark；
Watermark bianry image generation module, for generating watermark bianry image according to the resulting result of comparison.
9. a kind of computer readable storage medium, be stored with computer program makes when the computer program is executed by processor The processor is obtained to execute such as the step of any one of claims 1 to 5 the method.
10. a kind of computer equipment, including memory and processor, the memory is stored with computer program, the calculating When machine program is executed by the processor, so that the processor executes the step such as any one of claims 1 to 5 the method Suddenly.
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