CN103577729A - Method for stamping electronic seal on PDF (portable document format) file - Google Patents

Method for stamping electronic seal on PDF (portable document format) file Download PDF

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CN103577729A
CN103577729A CN201310531143.0A CN201310531143A CN103577729A CN 103577729 A CN103577729 A CN 103577729A CN 201310531143 A CN201310531143 A CN 201310531143A CN 103577729 A CN103577729 A CN 103577729A
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pdf
seal
watermark
picture
page
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CN201310531143.0A
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CN103577729B (en
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王德淳
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Beijing Ruian Technology Co Ltd
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Beijing Ruian Technology Co Ltd
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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
    • 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
    • G06F21/60—Protecting data
    • G06F21/64—Protecting data integrity, e.g. using checksums, certificates or signatures

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  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Software Systems (AREA)
  • Computer Security & Cryptography (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Technology Law (AREA)
  • General Health & Medical Sciences (AREA)
  • Bioethics (AREA)
  • Health & Medical Sciences (AREA)
  • Editing Of Facsimile Originals (AREA)
  • Image Processing (AREA)

Abstract

The invention relates to a method for stamping an electronic seal on a PDF (portable document format) file. The method comprises the steps as follows: a packaged source data list is obtained and a third party component is called for creating a temporary PDF file; a watermark is added in the temporary PDF file; and an electronic seal picture is nested in the temporary PDF file added with the watermark, and finally, the PDF file is generated. The PDF file is generated through a programming language, the scanned electronic seal picture is processed, and a corresponding algorithm is generated, so that the seal is added on the PDF file in real time. The electronic seal adopts a picture format, the position and the size of the seal can be calculated directly in the background according to a certain algorithm in a PDF generation process, and the seal is added to the PDF file; subsequent work of manually adding the seal is not required, the safety and the integrity of an electronic document of an output object in a project are guaranteed once, and additional configuration or cost is not required.

Description

In a kind of pdf document, add a cover the method for E-seal
Technical field
The present invention relates to computer software programming application, specifically, relate to a kind of method of adding a cover E-seal in pdf document, adopt programming language to generate pdf document, and add a cover E-seal in the generative process of pdf document.
Background technology
For the electronic document information needing protection in network transport process; generally take certain measure to guarantee security and the integrality of document, such as simplifying office workflow by adding a cover E-seal, improve circulation of official document speed; avoid document to be forged, or data are tampered.This safety practice is according to the degree of using, and the method for employing has:
L) use the method for Adobe software development, the menu namely carrying with software adds seal to ready-made pdf document.
2) interface that calls third-party E-seal product and provide in the process of exploitation is affixed one's seal.E-seal product is that public security department's approval assert to have legal effect, is that the marking of traditional physics official seal or list is encrypted by CA/PKI technology, then in digital storage media mode, adds the novel electronic edition seal that is placed on e-text.
The shortcoming of these two kinds of methods is: when E-seal is the picture of scanned version, these two kinds of methods all can not meet and when adopting on stream a kind of programming language to generate pdf document, add the situation that covers seal.
As shown in Figure 1, the existing E-seal method of adding a cover is used existing PDF source file to add as access entrance.Figure l left side represents that PDF source file adds seal by Adobe software, Fig. 1 right side is that PDF source file adds seal by calling third party's interface, at this moment, if the PDF generating in programming process is by Adobe software development, many one manual tasks, if by the interface interchange of third party's seal product, need corresponding cost, so also just lose generation PDF and immediately increased its due effect of E-seal.Therefore need to set up a kind of pdf document generating for program language and add the integrated approach of E-seal.
Summary of the invention
The object of this invention is to provide a kind of method of adding a cover E-seal in pdf document, by programming language, generate pdf document, by corresponding algorithm is processed and generated to the E-seal picture of scanning, add in real time seal is in pdf document.
For achieving the above object, technical scheme of the present invention is:
In pdf document, add a cover a method for E-seal, its step comprises:
1) obtain the source data list of encapsulation, and call third party's building component PDF temporary file;
2) in PDF temporary file, increase watermark;
3) nested E-seal picture in the PDF temporary file after increasing watermark, generates final pdf document.
Further, also comprise the steps:
4) the final pdf document generating is write in RKB, as databases such as Oracle, SQLserver;
5) delete described PDF temporary file.
Further, third party's assembly is ITEXT assembly described in step 1), adopts JAVA programming language to generate the calling interface of pdf document; Other language are as adopted iTextSharp assembly to generate PDF etc. with C# programming language.
Further, the process that step 1) creates PDF temporary file comprises some gauge outfits processing, as the different disposal of homepage and other page of display gauge head, and medical record: establishing N is the number that records of every page of acquiescence demonstration, if record number <N bar, directly generate in current TABLE; If >=N bar, divides two parts to process, front N bar after first page has shown, recording in Reseal to sub-table afterwards, then be stored in table row and carry out gapless setting between form.
Further, the watermark word increasing step 2) shows with the structure of matrix form.
Further, step 2) specific algorithm of increase watermark word is:
First form, length, transparency, line home position and the row initial position etc. of watermark word are set, and then Yi Yewei unit, in the loop body of page, defines watermark word ranks initial coordinate position; If n is a predetermined constant, m is that every row is carried out number of times, the position of each word that k is word, and j is the length of watermark word, the length of judgement watermark word:
If j >=n, a line watermark word is carried out m time so, with the unit of classifying as, the position display of k word of each order is set, and circulation j time, increases lateral coordinates position by a certain percentage after finishing, carry out row circulation next time; After row loop body is complete, row coordinate position is reduced by a certain percentage, then carry out row loop body next time;
Otherwise, if first j<n reduces row coordinate position by a certain percentage, then carry out carrying out with a line watermark word the circulation of m time.
Further, first step 3) is processed E-seal picture, is removed white background and saves as PNG form, is then added in the PDF temporary file increasing after watermark.Preferably, adopt Photoshop software to process described E-seal picture.
Further, when step 3) is added in PDF temporary file by E-seal figure, first obtain height and the width of PDF page, judge width whether be greater than height (exist horizontal and vertical, when PDF laterally generates, width G reatT.GreaT.GT height; If longitudinally generate, width < highly), the big or small coordinate that picture is set if be greater than is (page height/coefficient a, page width degree/coefficient b), otherwise the big or small coordinate of picture is (page width degree/coefficient a, page height/coefficient b), relocate picture position coordinates for (page width degree * x/y, page height * u/v), this, b, x, y, u and v are predetermined constant, a wherein, b can be floating number.
The present invention to generating the requirement of pdf document and seal is: pdf document creates by a kind of program language, and supports the generation of PDF; E-seal is picture format.Because E-seal is picture format, in the process that generates PDF, can on backstage, directly calculate by certain algorithm position and the size of seal and add in pdf document, do not need the later stage manually to do again the work of adding seal.In other words, because the present invention generates pdf document and adds E-seal by the method for programming language, disposablely complete security and the integrality of output electronic document in project, can directly for subordinate unit, download such document.The present invention adopts digital watermark in the generative process of PDF, can guarantee the integrality of electronic government documents.In addition, the present invention need not increase extra configuration or cost.
Accompanying drawing explanation
Fig. 1 is the existing process flow diagram that adds the method for E-seal in PDF source file.
Fig. 2 is generation pdf document of the present invention the process flow diagram of adding a cover the method for E-seal.
Fig. 3 is the process flow diagram of digital watermark matrix algorithms in embodiment.
Fig. 4 is the process flow diagram of nested E-seal picture algorithm in embodiment.
Fig. 5-1,5-2 are respectively in embodiment PDF source file after generating and the seal picture of electronic edition.
Fig. 6 is the final PDF schematic diagram adding in embodiment after watermark and E-seal.
Embodiment
Below by specific embodiments and the drawings, the present invention will be further described.
Fig. 2 is generation pdf document of the present invention the process flow diagram of adding a cover the method for E-seal.As shown in Figure 2, the method specifically comprises the steps:
1) adopt third party's assembly ITEXT as JAVA programming language, generate the calling interface of pdf document; Adopt source data encapsulation as the Data Source of pdf document.
2) obtain the source data list of encapsulation, call third party's building component PDF temporary file (generating interim pdf document), as shown in Fig. 5-1.
The process that creates PDF temporary file comprises some gauge outfits processing, as the different disposal of homepage and other page of display gauge head, medical record: establishing N is the number that records of every page of acquiescence demonstration, if record number <N bar, directly generates in current TABLE; If >=N bar, divides two parts to process, front N bar after first page has shown, recording in Reseal to sub-table afterwards, then be stored in table row and carry out gapless setting between form.
3) in PDF temporary file, increase watermark, process flow diagram as shown in Figure 3.
In the generative process of PDF, digital watermark is set, can further improves security, play the effect that prevents forgery, guarantee the integrality of electronic government documents.The watermark word of full page background is with the structure demonstration of matrix form, and the main algorithm of specific implementation is:
First form f, the length j of watermark word, the transparency v of word are set, line home position rowpose and row initial position colpose etc.Then Yi Yewei unit, in the loop body of page, defines watermark word ranks initial coordinate position, and initial value is all defaulted as 30.The font size arranging due to word is different, and page shows that line number also can be different.As generate the watermark word that one page X is capable, and in the loop body Zhong，Yi of this row behavior unit, replacement row-coordinate initial value, the length of judgement watermark word.
If n is an appointment constant or claims predetermined constant; M is that every row is carried out number of times, as a line shows 4 times; K is the position of each word of word, can obtain by circulation; J is the length of watermark word.If the length of watermark word is greater than n or equals n, n preferably equals 15, and a line watermark word is carried out m time so, with the unit of classifying as, the position display of k word of each order is set, circulation j time, after end, increase by a certain percentage lateral coordinates position, carry out row circulation next time.After row loop body is complete, row coordinate position is reduced by a certain percentage, then carry out row loop body next time.
Otherwise, if length is less than n, first row coordinate position is reduced by a certain percentage, then carries out carrying out with a line watermark word the circulation of m time.
4) nested E-seal picture.
First need scanned copy E-seal picture to carry out background transparent processing.Original paper can be the seal of A4 paper upper cover, by scanner or camera, takes the picture of electron gain version.The method of carrying out background transparent processing can be: in Photoshop software, double-click picture, allow it become common figure layer, with magic wand menu, select white, press DEL key, remove white background, finally at File menu, save as PNG form, save as the picture of transparent form, as shown in Fig. 5-2, (be red originally, and for meeting patent document, the requirement of picture color changed into black and white).
The main algorithm process flow diagram of nested picture as shown in Figure 4, comprising: obtain height and the width of PDF page, judge width whether be greater than height (exist horizontal and vertical, when PDF laterally generates, width G reatT.GreaT.GT height; If longitudinally generate, width < is highly), the big or small coordinate that picture is set if be greater than is (page height/coefficient a, otherwise the big or small coordinate of picture is (page width degree/coefficient a, page height/coefficient b) page width degree/coefficient b),, relocate picture position coordinates for (page width degree * x/y, page height * u/v), this, b, x, y, u, v is predetermined constant, a wherein, and b can be floating number.
In Fig. 4, " img.scaleAbsolute " represents set and display size; " img.setAlignment " represents to arrange alignment thereof; " img.setAbsolutePosition " represents to arrange picture position; " Image.ALIGN_TOP " represents top alignment.
As shown in Figure 4, when page height is greater than width, seal picture size coordinate is:
Img.scaleAbsolute (pageWidth/6.4f, pageHeight/4.8f); (noting: f represents floating number)
When page height is less than width, seal picture size coordinate is:
Img.scaleAbsolute (pageHeight/6.4f, pageWidth/4.8f); (noting: f represents floating number)
Seal picture position is:
img.setAlignment(Image.ALIGN_TOP)；
img.setAbsolutePosition(pageWidth*9/16,pageHeight*7/9)。(noting: * represents the symbol that multiplies each other)
5) generate final pdf document.Fig. 6 is the final pdf document schematic diagram adding after watermark and E-seal, and the watermark word that it adopts and the content of E-seal Chinese word are " Rui-an Science and Technology Co., Ltd., Beijing ".
Although disclose for the purpose of illustration specific embodiments of the invention and accompanying drawing, its object is help to understand content of the present invention and implement according to this, but it will be appreciated by those skilled in the art that: without departing from the spirit and scope of the invention and the appended claims, various replacements, variation and modification are all possible.The present invention should not be limited to this instructions most preferred embodiment and the disclosed content of accompanying drawing, and the scope that the scope of protection of present invention defines with claims is as the criterion.

Claims (10)

1. in pdf document, add a cover a method for E-seal, its step comprises:
1) obtain the source data list of encapsulation, and call third party's building component PDF temporary file;
2) in PDF temporary file, increase watermark;
3) nested E-seal picture in the PDF temporary file after increasing watermark, generates final pdf document.
2. the method for claim 1, is characterized in that, also comprises the steps: the final pdf document generating to write in RKB, and deletes described PDF temporary file.
3. the method for claim 1, is characterized in that: described in step 1), third party's assembly is ITEXT assembly, adopts JAVA programming language to generate pdf document.
4. the method for claim 1, is characterized in that: described in step 1), third party's assembly is iTextSharp assembly, adopts C# programming language to generate pdf document.
5. the method for claim 1, it is characterized in that: when step 1) creates described PDF temporary file, carry out gauge outfit processing, comprise: establishing N is the number that records of every page of acquiescence demonstration, if record number <N bar, directly in current TABLE, generates; If >=N bar, divides two parts to process, front N bar after first page has shown, recording in Reseal to sub-table afterwards, then be stored in table row and carry out gapless setting between form.
6. the method for claim 1, is characterized in that: step 2) in watermark word with the structure of matrix form, show.
7. method as claimed in claim 6, is characterized in that step 2) adopt following algorithm to increase watermark word: form, length, transparency, line home position and row initial position that first watermark word is set; Then Yi Yewei unit, in the loop body of page, defines watermark word ranks initial coordinate position; If n is a predetermined constant, m is that every row is carried out number of times, k is the position of each word of word, and j is the length of watermark word, the length of judgement watermark word: if j >=n, a line watermark word is carried out m time so, with the unit of classifying as, the position display of k word of each order is set, circulation j time, after end, increase by a certain percentage lateral coordinates position, carry out row circulation next time; After row loop body is complete, row coordinate position is reduced by a certain percentage, then carry out row loop body next time; Otherwise, if first j<n reduces row coordinate position by a certain percentage, then carry out carrying out with a line watermark word the circulation of m time.
8. the method for claim 1, is characterized in that: first step 3) is processed E-seal picture, is removed white background and saves as the picture of transparent form, is then added in the PDF temporary file increasing after watermark.
9. method as claimed in claim 8, is characterized in that: adopt Photoshop software to process E-seal picture.
10. the method for claim 1, it is characterized in that: when step 3) is added in PDF temporary file by E-seal figure, first obtain height and the width of PDF page, judge whether width is greater than height, the big or small coordinate that picture is set if be greater than is (page height/coefficient a, page width degree/coefficient b), otherwise the big or small coordinate of picture is (page width degree/coefficient a, page height/coefficient b), relocating picture position coordinates is (page width degree * x/y, page height * u/v), wherein a, b, x, y, u and v are predetermined constant.
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Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104134023A (en) * 2014-08-15 2014-11-05 北京邮电大学 Watermark processing method and system
CN105760172A (en) * 2016-03-02 2016-07-13 浪潮软件集团有限公司 Statement generation method based on itext
CN104134023B (en) * 2014-08-15 2017-01-04 北京邮电大学 A kind of watermark handling method and system for processing watermark
CN107292136A (en) * 2017-07-10 2017-10-24 广东省广业科技集团有限公司 A kind of pdf document anti-counterfei waterprint embedding grammar and system based on micro services
CN107291919A (en) * 2017-06-28 2017-10-24 四川妥妥递科技有限公司 A kind of system and method for add fields online in pdf document
CN107984910A (en) * 2017-12-05 2018-05-04 大连易签云网络科技有限公司 A kind of method and apparatus of electronic-seal
CN108109187A (en) * 2017-12-04 2018-06-01 泰康保险集团股份有限公司 E-seal generation method, device and electronic equipment
CN108280371A (en) * 2018-01-28 2018-07-13 丁超 Generate method, computer readable storage medium and the computing device of electronic document
CN108875322A (en) * 2018-05-31 2018-11-23 四川物联亿达科技有限公司 A kind of digital archives seal method based on e-government Intranet
CN109739451A (en) * 2018-10-22 2019-05-10 京东方科技集团股份有限公司 Digital picture methods of exhibiting, apparatus and system
TWI663553B (en) * 2017-02-17 2019-06-21 大陸商平安科技（深圳）有限公司 Method and device for generating contract
CN110727962A (en) * 2019-10-17 2020-01-24 武汉英思工程科技股份有限公司 Electronic signature method suitable for whole-flow process
CN111563238A (en) * 2019-04-19 2020-08-21 上海约顺信息科技有限公司 Anti-counterfeiting PDF automatic generation system and method for contract text
CN112733095A (en) * 2020-12-25 2021-04-30 山东浪潮通软信息科技有限公司 Implementation method and equipment for automatically generating document watermark
CN113989123A (en) * 2021-12-23 2022-01-28 广州市新文溯科技有限公司 Electronic seal stamping method and system, electronic equipment and readable medium
CN116702719A (en) * 2023-06-16 2023-09-05 易签链(深圳)科技有限公司 Intelligent seal text generation method based on manual typesetting deep learning

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050120290A1 (en) * 2003-12-01 2005-06-02 Information Handling Services Inc. Page rendered electronic file processing
CN1758585A (en) * 2004-10-10 2006-04-12 北京华旗数码影像技术研究院有限责任公司 Method for recogniting seal by digital watermark
JP4179977B2 (en) * 2003-11-28 2008-11-12 株式会社リコー Stamp processing apparatus, electronic approval system, program, and recording medium
CN101398870A (en) * 2007-09-24 2009-04-01 广州市百成科技有限公司 Electronic stamp system based on password layered system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4179977B2 (en) * 2003-11-28 2008-11-12 株式会社リコー Stamp processing apparatus, electronic approval system, program, and recording medium
US20050120290A1 (en) * 2003-12-01 2005-06-02 Information Handling Services Inc. Page rendered electronic file processing
CN1758585A (en) * 2004-10-10 2006-04-12 北京华旗数码影像技术研究院有限责任公司 Method for recogniting seal by digital watermark
CN101398870A (en) * 2007-09-24 2009-04-01 广州市百成科技有限公司 Electronic stamp system based on password layered system

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
司秀丽、李伟为: "iTextSharp在新能源Web系统中的PDF报表应用", 《农业网络信息》 *
司秀丽、李伟为: "iTextSharp在新能源Web系统中的PDF报表应用", 《农业网络信息》, no. 10, 31 October 2012 (2012-10-31), pages 47 - 52 *
李宽、张志红: "基于C# iTextsharp类库PDF文档生成技术的研究与应用", 《昆明学院学报》 *

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* Cited by examiner, † Cited by third party
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CN104134023B (en) * 2014-08-15 2017-01-04 北京邮电大学 A kind of watermark handling method and system for processing watermark
CN104134023A (en) * 2014-08-15 2014-11-05 北京邮电大学 Watermark processing method and system
CN105760172A (en) * 2016-03-02 2016-07-13 浪潮软件集团有限公司 Statement generation method based on itext
TWI663553B (en) * 2017-02-17 2019-06-21 大陸商平安科技（深圳）有限公司 Method and device for generating contract
US10825088B2 (en) 2017-02-17 2020-11-03 Ping An Technology (Shenzhen) Co., Ltd. Contract generation method and apparatus, server and storage medium
CN107291919A (en) * 2017-06-28 2017-10-24 四川妥妥递科技有限公司 A kind of system and method for add fields online in pdf document
CN107292136A (en) * 2017-07-10 2017-10-24 广东省广业科技集团有限公司 A kind of pdf document anti-counterfei waterprint embedding grammar and system based on micro services
CN108109187A (en) * 2017-12-04 2018-06-01 泰康保险集团股份有限公司 E-seal generation method, device and electronic equipment
CN107984910A (en) * 2017-12-05 2018-05-04 大连易签云网络科技有限公司 A kind of method and apparatus of electronic-seal
CN108280371A (en) * 2018-01-28 2018-07-13 丁超 Generate method, computer readable storage medium and the computing device of electronic document
CN108875322A (en) * 2018-05-31 2018-11-23 四川物联亿达科技有限公司 A kind of digital archives seal method based on e-government Intranet
CN108875322B (en) * 2018-05-31 2022-02-01 四川物联亿达科技有限公司 Digital archive stamping method based on electronic government network
CN109739451A (en) * 2018-10-22 2019-05-10 京东方科技集团股份有限公司 Digital picture methods of exhibiting, apparatus and system
CN111563238A (en) * 2019-04-19 2020-08-21 上海约顺信息科技有限公司 Anti-counterfeiting PDF automatic generation system and method for contract text
CN110727962A (en) * 2019-10-17 2020-01-24 武汉英思工程科技股份有限公司 Electronic signature method suitable for whole-flow process
CN110727962B (en) * 2019-10-17 2023-07-07 武汉英思工程科技股份有限公司 Electronic signature method suitable for whole-flow procedural
CN112733095A (en) * 2020-12-25 2021-04-30 山东浪潮通软信息科技有限公司 Implementation method and equipment for automatically generating document watermark
CN113989123A (en) * 2021-12-23 2022-01-28 广州市新文溯科技有限公司 Electronic seal stamping method and system, electronic equipment and readable medium
CN116702719A (en) * 2023-06-16 2023-09-05 易签链(深圳)科技有限公司 Intelligent seal text generation method based on manual typesetting deep learning

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