CN109446760A - Electronic Signature localization method in a kind of webpage PDF - Google Patents
Electronic Signature localization method in a kind of webpage PDF Download PDFInfo
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- CN109446760A CN109446760A CN201811080624.3A CN201811080624A CN109446760A CN 109446760 A CN109446760 A CN 109446760A CN 201811080624 A CN201811080624 A CN 201811080624A CN 109446760 A CN109446760 A CN 109446760A
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- Prior art keywords
- seal
- abscissa
- ordinate
- mouse
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- 238000000034 method Methods 0.000 title claims abstract description 11
- 230000004807 localization Effects 0.000 title claims abstract description 10
- 241000699666 Mus <mouse, genus> Species 0.000 claims description 43
- 238000012986 modification Methods 0.000 claims description 4
- 230000004048 modification Effects 0.000 claims description 4
- 230000003044 adaptive effect Effects 0.000 claims description 3
- 238000004364 calculation method Methods 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 abstract description 9
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
Classifications
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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]
- G06F21/16—Program or content traceability, e.g. by watermarking
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/048—Interaction techniques based on graphical user interfaces [GUI]
- G06F3/0484—Interaction techniques based on graphical user interfaces [GUI] for the control of specific functions or operations, e.g. selecting or manipulating an object, an image or a displayed text element, setting a parameter value or selecting a range
- G06F3/0486—Drag-and-drop
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/048—Interaction techniques based on graphical user interfaces [GUI]
- G06F3/0487—Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F40/00—Handling natural language data
- G06F40/10—Text processing
- G06F40/166—Editing, e.g. inserting or deleting
- G06F40/171—Editing, e.g. inserting or deleting by use of digital ink
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- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Software Systems (AREA)
- Human Computer Interaction (AREA)
- Health & Medical Sciences (AREA)
- Artificial Intelligence (AREA)
- Audiology, Speech & Language Pathology (AREA)
- Computational Linguistics (AREA)
- General Health & Medical Sciences (AREA)
- Multimedia (AREA)
- Technology Law (AREA)
- Computer Hardware Design (AREA)
- Computer Security & Cryptography (AREA)
- User Interface Of Digital Computer (AREA)
Abstract
The invention discloses Electronic Signature localization methods in a kind of webpage PDF, it is characterised in that: the following steps are included: 1) parsing PDF document metadata, records PDF document position coordinate；2) when mouse down, the position of current mouse is got；After mouse is mobile, the position of mouse is obtained；3) position calculated when clicking picture is position of the finger mouse in picture i.e. mouse relative to the abscissa in the picture parent upper left corner and the value of ordinate；4) difference of the abscissa, ordinate of the position before calculating movement and the abscissa of the position after movement, ordinate；5) the abscissa and ordinate of new abscissa and ordinate replacement finite element, dragging seal to the step of pdf just finishes.Present invention combination digital signature technology, solves the technical issues of to multiple seals are disposably covered in electronic document, substantially increases efficiency of affixing one's seal, specified seal is added at the position in need affixed one's seal.
Description
Technical field
The invention belongs to a kind of Electronic Signature technical fields, and in particular to Electronic Signature localization method in a kind of webpage PDF.
Background technique
Set Zhang Fangfa in the close Electronic Signature of state is complicated for operation, can not be to disposably covering multiple seals in electronic document
, greatly reduce efficiency of affixing one's seal, especially can not specified seal is added at the position in need affixed one's seal, therefore can not expire
The demand of sufficient people.
Summary of the invention
The technical problem to be solved by the present invention is to provide electronics in a kind of webpage PDF in view of the above shortcomings of the prior art
Stamped signature localization method is solved and is asked the technology for disposably covering multiple seals in electronic document in conjunction with digital signature technology
Topic, substantially increase efficiency of affixing one's seal, institute the position in need affixed one's seal at addition specify seal, it is primary by Electronic Signature technology
Property all seals of signature.
To realize the above-mentioned technical purpose, the technical scheme adopted by the invention is as follows:
Electronic Signature localization method in a kind of webpage PDF, it is characterised in that: the following steps are included:
1) PDF document metadata is parsed, PDF document position coordinate is recorded；
2) when mouse down, the position of current mouse is got, that is, the position of opposite browser before moving；Mouse is mobile
After, obtain the position of mouse, that is, the position after moving；
3) position calculated when clicking picture is position of the finger mouse in picture i.e. mouse relative to picture father
The grade abscissa in the upper left corner and value of ordinate, they are used to guarantee that mouse after movement remains in the opposite position of picture
It sets, by the way that the position of mouse is subtracted the two deviants；
4) calculate it is mobile before the abscissa of position, ordinate and it is mobile after the abscissa of position, ordinate
Difference, the abscissa of element is designated as after movement: abscissa-mouse down abscissa+element initial horizontal after mouse is mobile
Coordinate；Ordinate are as follows: the initial ordinate of ordinate-mouse down ordinate+element after mouse is mobile；
5) the abscissa and ordinate of new abscissa and ordinate replacement finite element, the step of dragging seal to pdf
Suddenly just finish.
E-seal position algorithm in above-mentioned pdf, comprising the following steps:
1) the pdf total page number for carrying out positioning and record standard pdf is subtracted into seal multiplied by the length of standard pdf individual pages
Length is exactly the top/bottom latitude that seal can drag, and top/bottom latitude cannot be less than 0；
2) width for recording PDF subtracts the width of seal, is exactly the length for the left and right range that seal can drag in pdf, left and right
Range cannot be less than 0；
3) upper left corner PDF abscissa and ordinate are set as 0；
4) PDF is calculated relative to the position, that is, abscissa in the screen upper left corner and the difference of ordinate；
5) when mouse, which is moved within the scope of PDF, and clicks seal does not put, the position in the seal relative screen upper left corner is obtained
6) abscissa Yu ordinate in the seal relative screen upper left corner subtract PDF relative to the screen upper left corner abscissa with
The result that ordinate obtains is exactly coordinate value of the seal relative to PDF；
7) when mouse is mobile, the continuous position for obtaining mouse, and calculate the new coordinate modification seal of seal relative to
The coordinate position of PDF determines the position of seal until mouse leaves；
8) pulling terminates, and cancels the label of dragging, records coordinate position, that is, abscissa, ordinate of the seal relative to PDF.
The location algorithm of above-mentioned backstage stamped signature PDF, which is divided into after PDF does not rotate progress stamped signature algorithm and PDF rotation, to carry out
Two kinds of situations of stamped signature algorithm；
Wherein PDF do not rotate carry out stamped signature algorithm the following steps are included:
1) pixel of original image, which goes to page end according to certain multiplying power, makes the resolution ratio at its adaptive screen end；
2) lower left corner that pdf is arranged is that origin carries out sentencing calculation；
3) abscissa of final stamped signature is exactly the abscissa of seal position, and ordinate is exactly that the length of single page pdf subtracts print
The size of chapter subtracts ordinate of the seal relative to pdf upper left position；
Wherein PDF rotation after carry out stamped signature algorithm the following steps are included:
A) using the center of PDF as the point of rotation, the angle of record PDF rotation；
B) abscissa of stamped signature are as follows: cosine function subtracts the length of seal ordinate multiplied by the length of bevel edge, and stamped signature is indulged
Coordinate are as follows: SIN function subtracts the length of seal abscissa multiplied by the length of bevel edge.
The present invention is based on PDF Electronic Signature technology, by verifying PDF, content is whether there is or not changing after affixing one's seal, in guarantee
Hold authenticity and integrality.
The present invention uses Canvas API and front end encryption technology in H5 to carry out transcoding to stamped signature picture, drags in picture
Dynamic calculates mouse relative to the position in PDF coordinate system when dragging, and realizes that the random dragging of stamped signature picture is placed.By to stamped signature
Floating, correction, polishing etc. a series of processing, make its effect as papery is affixed one's seal or is signed.
Front and back end carries out encrypting and decrypting operation using public, private key, is flowed by front end encryption technology to stamped signature picture byte
Row public key encryption, file transmission are shown in the form of messy code, other people can not read or distort.Rear end is receiving front end hair
It after the byte stream information sent, is decoded using private key, guarantees the safety of file.Use electronic document and digital signature skill
Art, or even than using safer by signed and stamped written document.
The advantage of the invention is that the following: in conjunction with digital signature technology, solve in electronic document disposably plus
The technical issues of covering multiple seals substantially increases efficiency of affixing one's seal, specified seal is added at the position in need affixed one's seal, lead to
It crosses Electronic Signature technology and disposably signs all seals.
Specific embodiment
A specific embodiment of the invention is further illustrated below:
Electronic Signature localization method in a kind of webpage PDF, it is characterised in that: the following steps are included:
1) PDF document metadata is parsed, PDF document position coordinate is recorded；
2) when mouse down, the position of current mouse is got, that is, the position of opposite browser before moving；Mouse is mobile
After, obtain the position of mouse, that is, the position after moving；
3) position calculated when clicking picture is position of the finger mouse in picture i.e. mouse relative to picture father
The grade abscissa in the upper left corner and value of ordinate, they are used to guarantee that mouse after movement remains in the opposite position of picture
It sets, by the way that the position of mouse is subtracted the two deviants；
4) calculate it is mobile before the abscissa of position, ordinate and it is mobile after the abscissa of position, ordinate
Difference, the abscissa of element is designated as after movement: abscissa-mouse down abscissa+element initial horizontal after mouse is mobile
Coordinate；Ordinate are as follows: the initial ordinate of ordinate-mouse down ordinate+element after mouse is mobile；
5) the abscissa and ordinate of new abscissa and ordinate replacement finite element, the step of dragging seal to pdf
Suddenly just finish.
E-seal position algorithm in above-mentioned pdf, comprising the following steps:
1) the pdf total page number for carrying out positioning and record standard pdf is subtracted into seal multiplied by the length of standard pdf individual pages
Length is exactly the top/bottom latitude that seal can drag, and top/bottom latitude cannot be less than 0；
2) width for recording PDF subtracts the width of seal, is exactly the length for the left and right range that seal can drag in pdf, left and right
Range cannot be less than 0；
3) upper left corner PDF abscissa and ordinate are set as 0；
4) PDF is calculated relative to the position, that is, abscissa in the screen upper left corner and the difference of ordinate；
5) when mouse, which is moved within the scope of PDF, and clicks seal does not put, the position in the seal relative screen upper left corner is obtained
6) abscissa Yu ordinate in the seal relative screen upper left corner subtract PDF relative to the screen upper left corner abscissa with
The result that ordinate obtains is exactly coordinate value of the seal relative to PDF；
7) when mouse is mobile, the continuous position for obtaining mouse, and calculate the new coordinate modification seal of seal relative to
The coordinate position of PDF determines the position of seal until mouse leaves；
8) pulling terminates, and cancels the label of dragging, records coordinate position, that is, abscissa, ordinate of the seal relative to PDF.
The location algorithm of above-mentioned backstage stamped signature PDF, which is divided into after PDF does not rotate progress stamped signature algorithm and PDF rotation, to carry out
Two kinds of situations of stamped signature algorithm；
Wherein PDF do not rotate carry out stamped signature algorithm the following steps are included:
1) pixel of original image, which goes to page end according to certain multiplying power, makes the resolution ratio at its adaptive screen end；
2) lower left corner that pdf is arranged is that origin carries out sentencing calculation；
3) abscissa of final stamped signature is exactly the abscissa of seal position, and ordinate is exactly that the length of single page pdf subtracts print
The size of chapter subtracts ordinate of the seal relative to pdf upper left position；
Wherein PDF rotation after carry out stamped signature algorithm the following steps are included:
A) using the center of PDF as the point of rotation, the angle of record PDF rotation；
B) abscissa of stamped signature are as follows: cosine function subtracts the length of seal ordinate multiplied by the length of bevel edge, and stamped signature is indulged
Coordinate are as follows: SIN function subtracts the length of seal abscissa multiplied by the length of bevel edge.
The above is only the preferred embodiment of the present invention, protection scope of the present invention is not limited merely to above-described embodiment,
All technical solutions belonged under thinking of the present invention all belong to the scope of protection of the present invention.It should be pointed out that for the art
For those of ordinary skill, several improvements and modifications without departing from the principles of the present invention should be regarded as protection of the invention
Range.
Claims (3)
1. Electronic Signature localization method in a kind of webpage PDF, it is characterised in that: the following steps are included:
1) PDF document metadata is parsed, PDF document position coordinate is recorded；
2) when mouse down, the position of current mouse is got, that is, the position of opposite browser before moving；Mouse movement terminates
Afterwards, the position for obtaining mouse, that is, the position after moving；
3) position calculated when clicking picture is that position of the finger mouse in picture i.e. mouse is left relative to picture parent
The abscissa at upper angle and the value of ordinate, they are used to guarantee the relative position that mouse after movement remains in picture, lead to
It crosses and the position of mouse is subtracted into the two deviants；
4) difference of the abscissa, ordinate of the position before calculating movement and the abscissa of the position after movement, ordinate,
The abscissa of element is designated as after movement: the initial abscissa of abscissa-mouse down abscissa+element after mouse is mobile；
Ordinate are as follows: the initial ordinate of ordinate-mouse down ordinate+element after mouse is mobile；
5) the abscissa and ordinate of new abscissa and ordinate replacement finite element, the step of pulling seal to pdf, is just
Finish.
2. Electronic Signature localization method in a kind of webpage PDF according to claim 1, it is characterised in that: in the pdf
E-seal position algorithm, comprising the following steps:
1) the pdf total page number for carrying out positioning and record standard pdf is subtracted into the length of seal just multiplied by the length of standard pdf individual pages
It is the top/bottom latitude that seal can drag, top/bottom latitude cannot be less than 0；
2) width for recording PDF subtracts the width of seal, is exactly the length for the left and right range that seal can drag in pdf, left and right range
It cannot be less than 0；
3) upper left corner PDF abscissa and ordinate are set as 0；
4) PDF is calculated relative to the position, that is, abscissa in the screen upper left corner and the difference of ordinate；
5) when mouse, which is moved within the scope of PDF, and clicks seal does not put, the position in the seal relative screen upper left corner is obtained
6) abscissa Yu ordinate in the seal relative screen upper left corner subtract PDF relative to the abscissa in the screen upper left corner and vertical seat
Marking obtained result is exactly coordinate value of the seal relative to PDF；
7) when mouse is mobile, the continuous position for obtaining mouse, and the new coordinate modification seal of seal is calculated relative to PDF's
Coordinate position determines the position of seal until mouse leaves；
8) pulling terminates, and cancels the label of dragging, records coordinate position, that is, abscissa, ordinate of the seal relative to PDF.
3. Electronic Signature localization method in a kind of webpage PDF according to claim 1, it is characterised in that: the backstage
The location algorithm of stamped signature PDF, which is divided into after PDF does not rotate progress stamped signature algorithm and PDF rotation, carries out two kinds of situations of stamped signature algorithm；
Wherein PDF do not rotate carry out stamped signature algorithm the following steps are included:
1) pixel of original image, which goes to page end according to certain multiplying power, makes the resolution ratio at its adaptive screen end；
2) lower left corner that pdf is arranged is that origin carries out sentencing calculation；
3) abscissa of final stamped signature is exactly the abscissa of seal position, and ordinate is exactly that the length of single page pdf subtracts seal
Size subtracts ordinate of the seal relative to pdf upper left position；
Wherein PDF rotation after carry out stamped signature algorithm the following steps are included:
A) using the center of PDF as the point of rotation, the angle of record PDF rotation；
B) abscissa of stamped signature are as follows: cosine function subtracts the length of seal ordinate, the ordinate of stamped signature multiplied by the length of bevel edge
Are as follows: SIN function subtracts the length of seal abscissa multiplied by the length of bevel edge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201811080624.3A CN109446760A (en) | 2018-09-17 | 2018-09-17 | Electronic Signature localization method in a kind of webpage PDF |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811080624.3A CN109446760A (en) | 2018-09-17 | 2018-09-17 | Electronic Signature localization method in a kind of webpage PDF |
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| CN201811080624.3A Pending CN109446760A (en) | 2018-09-17 | 2018-09-17 | Electronic Signature localization method in a kind of webpage PDF |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109781207A (en) * | 2019-01-15 | 2019-05-21 | 江苏东方赛光电有限公司 | A kind of level monitoring system based on IPC technology |
| CN110245220A (en) * | 2019-05-05 | 2019-09-17 | 深圳法大大网络科技有限公司 | Electronic document signs method, apparatus and server, storage medium |
| CN111444672A (en) * | 2020-06-11 | 2020-07-24 | 南京壹证通信息科技有限公司 | Method for scaling stamp and PDF in linkage manner during PDF stamping of mobile terminal |
| CN111783384A (en) * | 2020-06-29 | 2020-10-16 | 金茂投资管理(天津)有限公司 | Method, device, server and storage medium for determining position on PDF document |
| CN111881653A (en) * | 2020-07-20 | 2020-11-03 | 江西金格科技股份有限公司 | Method for positioning impressions in batch PDF (Portable document Format) documents |
| CN112529516A (en) * | 2020-11-10 | 2021-03-19 | 上海同在互联网科技有限公司 | Method, device and system for large-file online high-performance webpage electronic signature |
| CN112559938A (en) * | 2020-12-21 | 2021-03-26 | 深圳云之家网络有限公司 | Electronic seal file generation method and device, computer equipment and storage medium |
| CN112749282A (en) * | 2019-10-31 | 2021-05-04 | 北京国双科技有限公司 | Knowledge graph display method, device, equipment and storage medium |
| CN113535651A (en) * | 2021-09-15 | 2021-10-22 | 南京汽轮电机(集团)有限责任公司 | Non-standard PDF file bar code adding method, device and storage medium |
| CN113918059A (en) * | 2021-10-26 | 2022-01-11 | 国电南瑞科技股份有限公司 | Signature position positioning method and device of electronic cloud signature |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109781207A (en) * | 2019-01-15 | 2019-05-21 | 江苏东方赛光电有限公司 | A kind of level monitoring system based on IPC technology |
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| CN111444672A (en) * | 2020-06-11 | 2020-07-24 | 南京壹证通信息科技有限公司 | Method for scaling stamp and PDF in linkage manner during PDF stamping of mobile terminal |
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| CN111881653A (en) * | 2020-07-20 | 2020-11-03 | 江西金格科技股份有限公司 | Method for positioning impressions in batch PDF (Portable document Format) documents |
| CN112529516A (en) * | 2020-11-10 | 2021-03-19 | 上海同在互联网科技有限公司 | Method, device and system for large-file online high-performance webpage electronic signature |
| CN112559938A (en) * | 2020-12-21 | 2021-03-26 | 深圳云之家网络有限公司 | Electronic seal file generation method and device, computer equipment and storage medium |
| CN113535651A (en) * | 2021-09-15 | 2021-10-22 | 南京汽轮电机(集团)有限责任公司 | Non-standard PDF file bar code adding method, device and storage medium |
| CN113918059A (en) * | 2021-10-26 | 2022-01-11 | 国电南瑞科技股份有限公司 | Signature position positioning method and device of electronic cloud signature |
| CN113918059B (en) * | 2021-10-26 | 2023-11-28 | 国电南瑞科技股份有限公司 | Signature position positioning method and device for electronic cloud signature |
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