CN106709315A - Login information verification method and apparatus for application system - Google Patents

Login information verification method and apparatus for application system Download PDF

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Publication number
CN106709315A
CN106709315A CN201510780018.2A CN201510780018A CN106709315A CN 106709315 A CN106709315 A CN 106709315A CN 201510780018 A CN201510780018 A CN 201510780018A CN 106709315 A CN106709315 A CN 106709315A
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China
Prior art keywords
picture
application system
measured
source
log
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CN201510780018.2A
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CN106709315B (en
Inventor
陈文博
李云龙
高峰
张建军
苏砫
王星亮
张威
周建波
王秀娟
张晓琳
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Beijing Shenzhou Taiyue Software Co Ltd
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Beijing Shenzhou Taiyue Software Co Ltd
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Priority to CN201510780018.2A priority Critical patent/CN106709315B/en
Publication of CN106709315A publication Critical patent/CN106709315A/en
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    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F21/00Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • G06F21/30Authentication, i.e. establishing the identity or authorisation of security principals
    • G06F21/31User authentication
    • G06F21/36User authentication by graphic or iconic representation

Abstract

The invention discloses a login information verification method and apparatus for an application system. The method comprises the steps of logging in the application system by utilizing initial login information of the application system, intercepting a picture from a specified page of the application system to serve as a source picture, and performing storage; after login information of the application system is modified, logging in the application system according to the modified login information, and intercepting a picture according to the position of the source picture from the specified page of the login application system, thereby obtaining a to-be-tested picture; matching the to-be-tested picture with the stored source picture; if a matching result is that the to-be-tested picture is consistent with the stored source picture, confirming that the modified login information is correct; and if a matching result is that the to-be-tested picture is inconsistent with the stored source picture, confirming that the modified login information is wrong. According to the method and the apparatus, the to-be-tested picture is matched with the source picture, so that whether the modified login information is correct or not is verified and whether the currently logined application system is a target application system corresponding to the login information or not is identified; and therefore, availability dial testing of the login information of the application system is realized and better intuitiveness is achieved.

Description

The log-on message verification method and device of a kind of application system
Technical field
The present invention relates to field of computer technology, and in particular to a kind of log-on message authentication of application system Method and device.
Background technology
Concentrate assets authentication platform, i.e., 4A platforms (certification Authentication, account Account, Authorize Authorization, audit Audit) resource can be provided a user with quickly access, concentration represents use Resource (for example, application system) list of family Internet access, user can be by clicking on the Resources list Resource connection, direct logging resource, and being accessed without arrive different resource system certifications respectively, realization User once just can log in multiple resources in Collective qualification platform authentication.
The account number of User logs in 4A platforms is divided into primary account number and from account, primary account number association Internet access Application system a, primary account number can include multiple from account, and each corresponds to an intended application from account System.In practice, 4A platforms can be according to certain Password Policy periodic modification login application system from account Password, be can use, it is necessary to from account to ensure that each signs in the password of the account of application system Test availability is carried out between amended password and application system, testing goes out the wrong account of password, and When modify, it is ensured that account number cipher is correct and signs in the availability of application system.
Existing testing technology, by capturing the Header key word in title of intended application system home page, sentences Whether disconnected application system homepage successfully connects, and returning result is html web page source code, not intuitively, difficult In analysis and understanding.Additionally, this technology is not suitable for using the application system of Silverlight technological development The availability testing of the account number cipher of system, exists and uses limitation.Silverlight is that one kind has merged Microsoft Multiple technologies Web present technology.It provides a set of Development Framework, and by using based on vector Image layer technology, support any size image seamless integration.Silverlight makes exploitation designer Can preferably cooperate, effectively createing can be in various browser such as Windows and Macintosh Abundant in content, the web application (i.e. Silverlight application programs) that interface is gorgeous of operation.
The content of the invention
The invention provides the log-on message verification method and device of a kind of application system, to solve existing skill The availability result of detection that art is present is not directly perceived and there is a problem of using limitation.
According to an aspect of the invention, there is provided a kind of log-on message verification method of application system, should Method includes:
Using application system initial log information registration described in application system, from the finger of the application system Determine the page and intercept picture as source picture, and preserve;
After the log-on message of the application system is changed, being logged according to the amended log-on message should With system, picture is intercepted according to the position of the source picture from the specified page of logged in application system, obtained To picture to be measured;
The picture to be measured is matched with the source picture for preserving;
If matching result is consistent, confirm that amended log-on message is correct;
If matching result is inconsistent, amended log-on message mistake is confirmed.
Alternatively, the method is further included:When confirming that amended log-on message is wrong, show institute Source picture and the picture to be measured are stated, and points out login failure result.
Alternatively, it is described to include as source picture from the specified page interception picture of the application system:Profit The specified page of the application system is parsed with HTML html parser, is obtained HTML markup, according to the HTML markup for obtaining, generates corresponding picture, is cut from the picture of generation Picture is taken as source picture;
The specified page from logged in application system intercepts picture bag according to the position of source picture Include:The specified page of logged in application system is solved using HTML html parser Analysis, obtains HTML markup, according to the HTML markup for obtaining, corresponding picture is generated, from generation Picture on intercept picture as picture to be measured.
Alternatively, it is described by the picture to be measured and the source picture for preserving match including:
The source image vegetarian refreshments of predetermined quantity is chosen in the source picture, the RGB of each source image vegetarian refreshments is extracted Color component, obtains the corresponding RGB color component array of each source image vegetarian refreshments, in a predetermined sequence, RGB color component array to the source image vegetarian refreshments is arranged;
According to the position of the source image vegetarian refreshments, choose same amount of in the picture opposite position to be measured Pixel to be measured, extracts the RGB color component of each pixel to be measured, obtains pixel to be measured Corresponding RGB color component array, according to corresponding order, to the RGB face of the pixel to be measured Colouring component array is arranged;
By the RGB color component of the RGB color component of each source image vegetarian refreshments and corresponding pixel to be measured It is compared.
Alternatively, the page headed by the specified page.
According to another aspect of the present invention, there is provided a kind of log-on message checking device of application system, The device includes:
Source picture obtaining unit, for application system described in the initial log information registration using application system, Picture is intercepted as source picture from the specified page of the application system, and is preserved;
Picture obtaining unit to be measured, for after the log-on message of the application system is changed, according to described Amended log-on message logs in application system, and the specified page from logged in application system is according to the source The position interception picture of picture, obtains picture to be measured;
Picture match unit, for the picture to be measured to be matched with the source picture for preserving;
Information confirmation unit, if consistent for matching result, confirms that amended log-on message is correct; If matching result is inconsistent, amended log-on message mistake is confirmed.
Alternatively, described information confirmation unit, is further used for, and has in the amended log-on message of confirmation Mistake, show the source picture and the picture to be measured, and point out login failure result.
Alternatively, the source picture obtaining unit, specifically for using HTML HTML solutions Parser is parsed to the specified page of the application system, obtains HTML markup, according to what is obtained HTML markup, generates corresponding picture, and picture is intercepted from the picture of generation as source picture;
The picture obtaining unit to be measured, specifically for utilizing HTML html parser pair The specified page of logged in application system is parsed, and obtains HTML markup, according to the HTML for obtaining Mark, generates corresponding picture, and picture is intercepted from the picture of generation as picture to be measured.
Alternatively, the picture match unit, the source specifically for choosing predetermined quantity in the source picture Pixel, extracts the RGB color component of each source image vegetarian refreshments, obtains each source image vegetarian refreshments correspondence RGB color component array, in a predetermined sequence, to the RGB color component of the source image vegetarian refreshments Array is arranged;
According to the position of the source image vegetarian refreshments, choose same amount of in the picture opposite position to be measured Pixel to be measured, extracts the RGB color component of each pixel to be measured, obtains pixel to be measured Corresponding RGB color component array, according to corresponding order, to the RGB face of the pixel to be measured Colouring component array is arranged;
By the RGB color component of the RGB color component of each source image vegetarian refreshments and corresponding pixel to be measured It is compared.
Alternatively, the page headed by the specified page.
The beneficial effects of the invention are as follows:The technical scheme of the embodiment of the present invention is based on image matching technology, profit Log in application system with amended log-on message and intercept picture and obtain picture to be measured, by picture to be measured with The source picture of preservation is matched, and determines whether amended log-on message is correct (i.e. according to matching result Whether amended log-on message can be signed in in intended application system), realize log-on message and target Availability detection between application system, and the mode of picture match is more directly perceived compared to html source code, Easily distinguish and understand.Importantly, the technical scheme of the embodiment of the present invention is by picture match Method, because the page of Silverlight application systems is that the image layer technological development based on vector is formed, So the embodiment of the present invention is also applied for Silverlight application systems, Silverlight technological development is solved Application system availability detection problem.
Brief description of the drawings
Fig. 1 is a kind of flow of the log-on message verification method of application system of one embodiment of the invention Figure;
Fig. 2 is a kind of flow of the log-on message verification method of application system of another embodiment of the invention Schematic diagram;
Fig. 3 is a kind of block diagram of the log-on message checking device of application system of one embodiment of the invention.
Specific embodiment
Core concept of the invention is:For prior art exist technical problem, based on picture interception and Picture match technology, using the source figure that specified page is intercepted after initial log information registration intended application system Piece, and it is preserved;And, the application system signed in using the interception of amended log-on message Specified page picture to be measured, picture to be measured is matched so as to be verified result with source picture.
According to an aspect of the invention, there is provided a kind of log-on message verification method of application system, figure 1 is a kind of flow chart of the log-on message verification method of application system of one embodiment of the invention, referring to Fig. 1, the method includes:
S11, using application system initial log information registration described in application system, from the application system Specified page intercept picture as source picture, and preserve;
S12, after the log-on message of the application system is changed, according to the amended log-on message Application system is logged in, is intercepted according to the position of the source picture from the specified page of logged in application system and schemed Piece, obtains picture to be measured;
S13, the picture to be measured is matched with the source picture for preserving;
S14, if matching result is consistent, confirms that amended log-on message is correct;If matching result is not Unanimously, then amended log-on message mistake is confirmed.
As shown in Figure 1 the step of, understands, in the embodiment of the present invention, first with initial log information registration mesh Mark application system obtains source picture and preserves, and then recycles amended log-on message to log in application system And intercept picture and obtain picture to be measured, picture to be measured is matched with the source picture for preserving, according to matching Result determines whether amended log-on message is correct, realizes between log-on message and intended application system Availability is detected, and the mode of picture match is more directly perceived compared to html source code, easily distinguishes and manages Solution.In addition, the technical scheme of the embodiment of the present invention is also applied for Silverlight application systems, fill up The blank of the availability field of detecting of Silverlight application systems.
Fig. 2 is a kind of flow of the log-on message verification method of application system of another embodiment of the invention Schematic diagram, referring to Fig. 2, in the present embodiment, method is further included shown in Fig. 1:Confirming to change When log-on message afterwards is wrong, show source picture and picture to be measured, and point out login failure result.
The log-on message verification method of this application system of the present embodiment includes step S21 to step S26, Step S21 to step S26 is specifically described below in conjunction with Fig. 2.
Step S21, initial log information registration (intended application system)
First, this method obtains source using initial log information registration (intended application system) so as to follow-up Picture.
In practice, login account number of the user on assets certification 4A platforms are concentrated includes primary account number and from account Number.One primary account number often associate multiple application systems (for example, application system A, application system B, Application system C), each corresponds to an application system, i.e. intended application system from account.Due to 4A Platform is understood periodic modification log-on message (i.e. from the password of account) and is used from the amended password of account When logging in application system, it is possible to apply system A is corresponding to be logged on application system B from account, And in order to verify from the availability between amended password, the application system of account, i.e., it is amended close Whether code can be successfully logged onto intended application system, so needing to verify amended password.
Step S22, picture is intercepted in the specified page of application system, obtains source picture
After signing in intended application system, a pictures are intercepted in the specified page of application system, as source Picture is subsequently to be matched.
In the present embodiment, after generally logging in application system, the homepage face of the often application system for representing, because This time in order to save picture interception, the page headed by specified page.It is appreciated that specified page also may be used To be other pages of application system, this is not restricted.
In the present embodiment, include in the specified page interception picture of application system:Using hypertext markup language Speech html parser is parsed to the specified page of application system, obtains HTML markup, according to The HTML markup for obtaining, generates corresponding picture, and picture is intercepted from the picture of generation as source picture.
In specifically used initial log information registration, asset management platform is concentrated to obtain the clothes of application system The specified page that business device is returned, and voluntarily parsed using html parser, corresponding parsing is real one by one It is existing, HTML markup is obtained, according to the HTML markup for obtaining, corresponding picture is generated, from generation Picture on intercept picture as source picture.
Here with html parser, the specified page source code that application system server is returned is carried out Parsing, and the HTML markup of pictorial information described in source code is found, according to these HTML markups, Generation picture, intercepts a pictures as source picture, and preserve from the picture of generation.It is appreciated that HTML markup is to describe the named web page page in the form of code (to use Silverlight technological development Multiple pictures are designed with webpage) in the information such as length, width, height, the content of picture that sets. According to these description informations (i.e. HTML markup), corresponding picture is generated, then on the picture of generation Interception picture respectively obtains source picture or picture to be measured, and carries out picture match operation, direct with existing The availability Detection Techniques that source code according to specified page is compared are compared, more with intuitive.
It should be noted that here how according to HTML markup, the operation for generating picture can be used Means of the prior art are realized, this are not restricted.
Step S23, (application system) is logged in using amended log-on message
When here, using amended password login, it is possible to the application system non-targeted application for signing in System, so needing to carry out availability detection.
Step S24, in the specified page of the application system for being logged in, the position interception figure according to source picture Piece, obtains picture to be measured
After amended log-on message signs in an application system, according to the source figure obtained in step S22 The position of piece, a pictures are intercepted in the specified page of this login application system, that is, obtain picture to be measured. The step of obtaining picture to be measured reference can be made to the step of foregoing acquisition source picture, repeat no more here.
Need exist for, it is emphasized that the position for intercepting picture to be measured will ensure and intercept the position phase of source picture Correspondence, for example, source picture is in the interception of this position of the lower left corner in the homepage face of intended application system, Picture so to be measured is also required to logging in the lower-left Angle Position interception in the homepage face of application system.Specific implementation When, position coordinates can be passed through according to the first page makeup rectangular coordinate system of application system, the position of interception It is determined that.
Step S25, matches source picture and picture to be measured
In the present embodiment, matching source picture and picture to be measured include:In source, picture chooses the source of predetermined quantity Pixel, extracts the RGB color component of each source image vegetarian refreshments, obtains the corresponding RGB of each source image vegetarian refreshments Color component array, in a predetermined sequence, the RGB color component array to source image vegetarian refreshments is arranged Row;According to the position for choosing source image vegetarian refreshments, same amount for the treatment of is chosen in the corresponding position of picture to be measured Pixel is surveyed, the RGB color component of each pixel to be measured is extracted, pixel to be measured is obtained corresponding RGB color component array, according to corresponding order, to the RGB color component array of pixel to be measured Arranged;By the RGB face of the RGB color component of each source image vegetarian refreshments and corresponding pixel to be measured Colouring component is compared.
Here predetermined order can be according to collection pixel RGB color component size sequentially Arranged.
According to matching result, if matching result is consistent, confirm that log-on message is correct, i.e., it is amended Password can log in intended application system.If matching result is inconsistent, the method for the present embodiment also includes Step S26.
Step S26, shows source picture and picture to be measured, points out login failure result
With the availability detecting strategy of prior art, only return login failure result (and the result be with The form displaying of html source code) it is different, this method of the embodiment of the present invention also by source picture and Picture to be measured is shown, and points out login failed for user result.
Can not only more visual cues login failure result, and by the displaying of source picture and picture to be measured, User also will appreciate which the application system that amended password is currently logged in is, or according to source picture With the RGB color component (specific numerical value) of picture pixels point to be measured relatively know picture to be measured with Which difference source picture has, and more facilitates and understands and follow-up operation of modifying.
In addition, the embodiment of the present invention additionally provides a kind of log-on message checking device of application system, Fig. 3 It is a kind of block diagram of the log-on message checking device of application system, referring to Fig. 3, the login of the application system Information Authentication device 30 includes:
Source picture obtaining unit 301, for being applied described in the initial log information registration using application system System, intercepts picture as source picture, and preserve from the specified page of the application system;
Picture obtaining unit 302 to be measured, for when the application system log-on message change after, according to The amended log-on message logs in application system, and the specified page from logged in application system is according to institute The position interception picture of source picture is stated, picture to be measured is obtained;
Picture match unit 303, for picture to be measured to be matched with the source picture for preserving;
Information confirmation unit 304, if consistent for matching result, is confirming amended log-on message just Really;If matching result is inconsistent, amended log-on message mistake is confirmed.
In the present embodiment, information confirmation unit 304 is further used for, and is confirming amended log-on message When wrong, show source picture and the picture to be measured, and point out login failure result.
In the present embodiment, source picture obtaining unit 301, specifically for using HTML HTML Resolver is parsed to the specified page of application system, obtains HTML markup, according to what is obtained HTML markup, generates corresponding picture, and picture is intercepted from the picture of generation as source picture;
Picture obtaining unit 302 to be measured, specifically for utilizing HTML html parser pair The specified page of logged in application system is parsed, and obtains HTML markup, according to the HTML for obtaining Mark, generates corresponding picture, and picture is intercepted from the picture of generation as picture to be measured.
In the present embodiment, picture match unit 303, the source specifically for choosing predetermined quantity in source picture Pixel, extracts the RGB color component of each source image vegetarian refreshments, obtains the corresponding RGB of each source image vegetarian refreshments Color component array, in a predetermined sequence, the RGB color component array to source image vegetarian refreshments is arranged Row;
According to the position of source image vegetarian refreshments, same amount of pixel to be measured is chosen in picture opposite position to be measured Point, extracts the RGB color component of each pixel to be measured, obtains the corresponding RGB face of pixel to be measured Colouring component array, according to corresponding order, the RGB color component array to pixel to be measured is arranged Row;
By the RGB color component of the RGB color component of each source image vegetarian refreshments and corresponding pixel to be measured It is compared.
In the present embodiment, the page headed by specified page.
From the foregoing, it will be observed that the log-on message checking device of the application system shown in Fig. 3, is believed using initial log Breath logs in intended application system, using image interception technique intercepts to source picture, and chooses several in the picture of source Individual pixel is preserved after being marked.According to amended close during the password of follow-up periodic modification login account number Code logs in application system, and the picture for intercepting relevant position obtains picture to be measured, and chooses right on picture to be measured The pixel answered, and be compared for pixel, whether it is target with the application system for verifying out login Whether application system, amended password is correct.Task-driven is make use of, is realized regularly to application The log-on message of system carries out availability detection.
It should be noted that the log-on message of this access application system in the present embodiment verifies device The course of work is to realize that step is corresponding with the log-on message verification method of foregoing application system, because This, the specific work process of the log-on message of the application system of the present embodiment checking device may refer to foregoing Illustrate, will not be repeated here.
In summary, the technical scheme of the embodiment of the present invention is based on image matching technology, using amended Log-on message logs in application system and intercepts picture and obtains picture to be measured, by picture to be measured and the source figure for preserving Piece is matched, and determines that whether correct amended log-on message is (i.e. amended to step on according to matching result Whether record information can be signed in in intended application system), realize between log-on message and intended application system Availability detection, and picture match mode compared to extract Header keywords code process mode It is more directly perceived, easily distinguish and understand.Importantly, the technical scheme of the embodiment of the present invention is to pass through Picture match, because the page of Silverlight application systems is the image layer technological development based on vector Form, so the embodiment of the present invention is also applied for Silverlight application systems, solve Silverlight The availability detection problem of application system.
Presently preferred embodiments of the present invention is the foregoing is only, protection model of the invention is not intended to limit Enclose.All any modification, equivalent substitution and improvements made within the spirit and principles in the present invention etc., Comprising within the scope of the present invention.

Claims (10)

1. the log-on message verification method of a kind of application system, it is characterised in that the method includes:
Using application system initial log information registration described in application system, from the finger of the application system Determine the page and intercept picture as source picture, and preserve;
After the log-on message of the application system is changed, being logged according to the amended log-on message should With system, picture is intercepted according to the position of the source picture from the specified page of logged in application system, obtained To picture to be measured;
The picture to be measured is matched with the source picture for preserving;
If matching result is consistent, confirm that amended log-on message is correct;
If matching result is inconsistent, amended log-on message mistake is confirmed.
2. the method for claim 1, it is characterised in that the method is further included:Confirming When amended log-on message is wrong, show the source picture and the picture to be measured, and point out to log in and lose Lose result.
3. method as claimed in claim 1 or 2, it is characterised in that
It is described to include as source picture from the specified page interception picture of the application system:Using hypertext Markup language html parser is parsed to the specified page of the application system, obtains HTML Mark, according to the HTML markup for obtaining, generates corresponding picture, and picture is intercepted from the picture of generation As source picture;
The specified page from logged in application system intercepts picture bag according to the position of source picture Include:The specified page of logged in application system is solved using HTML html parser Analysis, obtains HTML markup, according to the HTML markup for obtaining, corresponding picture is generated, from generation Picture on intercept picture as picture to be measured.
4. method as claimed in claim 1 or 2, it is characterised in that it is described by the picture to be measured with The source picture of preservation carries out matching to be included:
The source image vegetarian refreshments of predetermined quantity is chosen in the source picture, the RGB of each source image vegetarian refreshments is extracted Color component, obtains the corresponding RGB color component array of each source image vegetarian refreshments, in a predetermined sequence, RGB color component array to the source image vegetarian refreshments is arranged;
According to the position of the source image vegetarian refreshments, choose same amount of in the picture opposite position to be measured Pixel to be measured, extracts the RGB color component of each pixel to be measured, obtains pixel to be measured Corresponding RGB color component array, according to corresponding order, to the RGB face of the pixel to be measured Colouring component array is arranged;
By the RGB color component of the RGB color component of each source image vegetarian refreshments and corresponding pixel to be measured It is compared.
5. the method for claim 1, it is characterised in that the page headed by the specified page.
6. a kind of log-on message of application system verifies device, it is characterised in that the device includes:
Source picture obtaining unit, for application system described in the initial log information registration using application system, Picture is intercepted as source picture from the specified page of the application system, and is preserved;
Picture obtaining unit to be measured, for after the log-on message of the application system is changed, according to described Amended log-on message logs in application system, and the specified page from logged in application system is according to the source The position interception picture of picture, obtains picture to be measured;
Picture match unit, for the picture to be measured to be matched with the source picture for preserving;
Information confirmation unit, if consistent for matching result, confirms that amended log-on message is correct; If matching result is inconsistent, amended log-on message mistake is confirmed.
7. device as claimed in claim 6, it is characterised in that described information confirmation unit, further For, when confirming that amended log-on message is wrong, show the source picture and the picture to be measured, And point out login failure result.
8. device as claimed in claims 6 or 7, it is characterised in that the source picture obtaining unit, Specifically for being entered to the specified page of the application system using HTML html parser Row parsing, obtains HTML markup, according to the HTML markup for obtaining, generates corresponding picture, from Picture is intercepted on the picture of generation as source picture;
The acquisition picture element unit cell to be measured, specifically for utilizing HTML html parser pair The specified page of logged in application system is parsed, and obtains HTML markup, according to the HTML for obtaining Mark, generates corresponding picture, and picture is intercepted from the picture of generation as picture to be measured.
9. device as claimed in claims 6 or 7, it is characterised in that the picture match unit, tool Body is used to be chosen in the source picture source image vegetarian refreshments of predetermined quantity, extracts each source image vegetarian refreshments RGB color component, obtains the corresponding RGB color component array of each source image vegetarian refreshments, according to predetermined Sequentially, the RGB color component array to the source image vegetarian refreshments is arranged;
According to the position of the source image vegetarian refreshments, choose same amount of in the picture opposite position to be measured Pixel to be measured, extracts the RGB color component of each pixel to be measured, obtains pixel to be measured Corresponding RGB color component array, according to corresponding order, to the RGB face of the pixel to be measured Colouring component array is arranged;
By the RGB color component of the RGB color component of each source image vegetarian refreshments and corresponding pixel to be measured It is compared.
10. device as claimed in claim 6, it is characterised in that the page headed by the specified page.
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贺嘉: "统一认正授权审计管理平台的研究与实现", 《中国优秀硕士学位论文全文数据库 信息科技辑》 *

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110602076A (en) * 2019-08-15 2019-12-20 中国人民银行数字货币研究所 Identity using method, device and system based on master identity multiple authentication
CN110751861A (en) * 2019-11-28 2020-02-04 张丽丽 Network remote education system based on cloud platform

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