CN111737200B

CN111737200B - Quality control method and system based on open network transmission and output version file

Info

Publication number: CN111737200B
Application number: CN202010822539.0A
Authority: CN
Inventors: 锦传银; 张海军; 赵世贤; 李雅
Original assignee: Beijing Renjiao Juzhen Graphic Technology Co ltd
Current assignee: People's Education Press Ltd.
Priority date: 2020-08-17
Filing date: 2020-08-17
Publication date: 2020-11-20
Anticipated expiration: 2040-08-17
Also published as: CN111737200A

Abstract

The invention discloses a quality control method and a control system based on open network transmission output version files, wherein the method is applied to a compilation file management system and a printing file management system, and a compilation file management module generates a transcription printing file and an 8-bit TIFF file from a compilation PDF file; the printing file distribution module generates an encrypted copy file from the transferred printing file and the 8-bit TIFF file and sets the authority and the effective time; and the printing file downloading module decrypts the downloaded encrypted copy printing file to generate an 8-bit TIFF file, and compares the 8-bit TIFF file with the downloaded and decrypted TIFF file. By the method, the problems of low typesetting quality and low efficiency of a publishing company are effectively solved, network security transmission, content quality guarantee and copyright validity control of the printed files at the typesetting and typesetting end, the publishing management end and the printing production end are efficiently solved, and the publishing printing working quality and efficiency are improved.

Description

Quality control method and system based on open network transmission and output version file

Technical Field

The invention belongs to the field of typesetting, publishing and printing, mainly relates to network transmission, quality control, security encryption, authorization control and version checking comparison technologies of a redacted file and a printed file, and particularly relates to a quality control method and a control system for outputting a version file based on open network transmission.

Background

With the continuous development of the publishing and printing industry towards digitalization, informatization, standardization and greening, the film printing technology is gradually eliminated, the CTP plate making technology is widely applied, and the traditional film plate used for printing is replaced by an electronic plate (generally a PDF (Portable document Format) file). The electronic edition has the characteristics of high transmission speed, simple copying, high efficiency secondary processing and the like, so that once the electronic edition is transmitted out of a publishing unit, the copyright problem, the pirate problem and the monitoring failure problem of the given edition unit are caused, and the problems are urgently needed to be solved by the publishing unit.

On the other hand, because there is a difference in software brand and version model between an operating system, hardware equipment, and rasterization processing (also called RIP, which is a key technology in the printing field, and is a process of parsing a PDF format file into a dot matrix file satisfying printing and decomposing the file into corresponding four-color file information) used by an arrangement plate making enterprise and a printing enterprise, after the printed file of the arrangement plate making enterprise is transmitted to the printing enterprise through a network, and the like, the contents of the rasterized dot matrix printed file are often inconsistent with the electronic file generated by the arrangement plate making enterprise through software and hardware rasterization processing of the printing enterprise. In the existing method, a piece of paper pattern is printed on a dot matrix printed file processed by a printing enterprise, and then a worker is arranged to collate the printed paper pattern with the paper pattern edited and signed by responsibility, so that manual collation is time-consuming and labor-consuming, and the quality is difficult to guarantee. In another method, the dot matrix printed file processed by a printing enterprise is compared with the downloaded printed file by using the existing comparison tool, the comparison method can only ensure that the downloaded printed file is consistent with the dot matrix file, but cannot ensure that the content of the downloaded printed file is consistent with the content of the file responsible for editing and signing, the problem of safe and stable transmission of the printed file cannot be fundamentally solved, and the method cannot be directly applied to publishing and printing production. Another method is that firstly, the paper with the responsibility editing signature is scanned to form an electronic file, then the dot matrix file processed by the printing enterprise is compared with the scanned electronic file by using the existing comparison tool, and the comparison result is a whole page error report because of the irregular deformation of the scanned paper caused by factors such as paper expansion and position offset during printing, and the comparison result cannot be used as a basis for judging whether the contents of the two files are consistent. Therefore, the comparison method cannot meet the actual production requirements, and printed files with quality problems after analysis are frequently printed in batch in the actual production process, so that great paper waste and time waste are caused, and great loss is brought to a printing unit.

The patent technology published in the field is a remote version transfer system based on a central node mode, which is applied by Beijing printing college in 2012 and has a patent number of CN202870830U, but is not practiced in the field of publishing and printing. The defects of the method mainly comprise the following points: 1. with the popularization of CTP printing technology and equipment, each printing node has the technical processing capacity of the intermediate node at present, and the problem that the printing node technical equipment cannot meet the CTP plate making requirement does not exist; 2. the layout file is transmitted to each printing node by the central node in a 1-bit TIFF format, the problems of large data volume of the transmitted file, poor adjustability and variability of the data file and the like exist, and the requirements of process changes such as rear-end printing, folding and the like are difficult to meet; 3. the encryption and decryption authorization technology and the like are descriptive descriptions, and the detailed algorithm description is not carried out on the technology, and the file aging control is not carried out; 4. although the system relates to the links of publishing and printing, the method for ensuring the uniform specification, quality safety control and file validity control of typesetting and printing files in the links is not specifically described.

Disclosure of Invention

Based on the technical background and the current situation, the technical problem to be solved by the invention is to overcome the defects and provide a quality control method and a control system based on the file output by the open network transmission, the method and the system can improve the efficiency and the accuracy of publishing and printing, realize the safe transmission and the effectiveness control of the published file, get through the information barriers of three parties of typesetting manufacture, file management of a publishing company and production of a printing enterprise, realize the scientific development targets of digitization, informatization, standardization and greenization of the publishing and printing industry, and assist the structure adjustment and the optimization and the upgrade of the industry.

In order to solve the technical problems, the technical scheme provided by the invention is as follows:

the quality control method based on the open network transmission output version file comprises the following steps: the method is applied to a redacted file management system and a printed file management system, wherein the redacted file management system comprises a redacted file uploading module and a redacted file management module; the printing file management system comprises a printing file auditing module, a printing file distributing module and a printing file downloading module; the verification system also comprises a comparison tool embedded in the editing file uploading module, the editing file management module and the printing file downloading module, the uploading, downloading, printing and scanning of the editing file are completed through the editing file management system, the network security transmission at different places is realized, the comparison tool is used for comparing the editing file of the previous and subsequent times of verification, the verification and the correction are correct, and the editing and the correction work of the first three times of verification and the first check before printing is completed; after the editing and calibration work is finished, the final typesetting source file and the high-precision PDF editing and calibration file are uploaded to an editing and calibration file management system by the layout and plate making enterprise through an editing and calibration file uploading module; the editing and correcting file management module downloads a final typesetting source file and a high-precision PDF editing and correcting file uploaded by an audit typesetting and plate-making enterprise, converts the high-precision PDF editing and correcting file into a conversion printing file, generates 8 TIFF files corresponding to the high-precision PDF editing and correcting file and the conversion printing file, and stores the TIFF files into a typesetting and plate-making resource master library; the printing file auditing module audits the transformated printing files and the 8-bit TIFF files corresponding to all the components of the printing variety, and stores the files into a printing resource master library after the audit is passed; the printing file distribution module generates an encrypted file copy from the required bent printing file and the 8-bit TIFF file and sets validity, wherein the validity comprises file use permission and valid time; the printing file downloading module downloads the encrypted file copy, decrypts the downloaded encrypted file copy to obtain a decrypted transferred printing file and an 8-bit TIFF file, and generates the decrypted transferred printing file into the 8-bit TIFF file after the validity condition is met; and comparing the generated 8-bit TIFF file with the decrypted 8-bit TIFF file by using a comparison tool, and judging whether the received download file can be used for printing according to a comparison result, so that the quality of the print file for printing production is ensured to be stable, and the print quality is convenient to control.

According to the scheme, by setting up a uniform safe, stable, standard and efficient network transmission edition file quality control method, the same edition-making production software and hardware environments of the edition-making enterprises in different regions are realized, the standard and uniform edition-making technical standard is realized, and safe, reliable and standard editing and correcting files are provided for publishing units. And the editing and correcting file management module is used for carrying out bending on the high-precision PDF editing and correcting file uploaded by the typesetting and plate making enterprise to generate a bending and printing file, generating 8-bit TIFF files corresponding to the high-precision PDF editing and correcting file and the bending and printing file, comparing the two 8-bit TIFF files through an embedded comparison tool, ensuring that the content of the bending and printing file is consistent with that of the high-precision PDF editing and correcting file, and storing the files in a typesetting resource master library. And the printing file auditing module matches each printing part in the typesetting resource master library according to the variety attributes, and stores the transformational printing file corresponding to the variety and the 8-bit TIFF file corresponding to the transformational printing file into the production resource master library after completion. The printing file distribution module calls a required transfer printing file and a corresponding 8-bit TIFF file from a production resource master library, generates an encrypted printing file (copy) matched with a printing enterprise through an encryption technology, and authorizes the printing enterprise to download the distributed printing file. Each printing enterprise downloads the encrypted printing file through the printing file downloading module, decrypts and verifies the integrity, converts the decrypted printing file into a locally output 8-bit TIFF file, compares the locally output 8-bit TIFF file with the decrypted 8-bit TIFF file, and judges whether the content of the printing file in the software and hardware environment of the printing enterprise is consistent with the content of the front-end edition environment according to the size of a comparison display difference frame, so that the problem of content errors during network transmission of the publishing file and analysis and edition output of the printing enterprise is solved, and the controllable content quality of the publishing file is guaranteed. Further, the encryption and the effectiveness control of the electronic film are realized through an encryption authorization technology, and the problem of effective out-of-control copyright protection of the current printed files at a network transmission and printing production end is thoroughly solved.

Furthermore, the typesetting and plate making enterprise downloads the paper draft file of the printing responsibility edition and the revision through the edition and revision file uploading module, typesets according to the edition and revision line, and uploads the edition and revision file after the typesetting is finished; the publishing unit carries out metadata setting, authority setting and technical parameter setting on the editing and correcting file through the editing and correcting file management module, downloads the editing and correcting file uploaded by the printing and typesetting and platemaking enterprise, transfers responsibility edition to carry out correction, scans the draft of responsibility edition correction and uploads the draft to be transmitted back to the typesetting and platemaking enterprise through network transmission, and the three-correction one-core editing and correcting work is completed.

Furthermore, the editing and correcting file management module has the functions of downloading and verifying the editing and correcting file uploaded by the printing and typesetting enterprises and scanning the manuscript with responsibility for editing and correcting, and can be used for generating a transcription and printing file (PDF format) by transcribing the high-precision PDF editing and correcting file uploaded by the typesetting and typesetting enterprises (transcription usually refers to the process of converting the PDF file into a picture and improving the safety and stability of the PDF file), then generating a corresponding 8-bit TIFF File (TIFF is an abbreviation of Tag Image File Format, is a flexible bitmap Format for Image storage, has higher stability and universality) from the high-precision PDF editing File and the transcription printing File, comparing the corresponding 8-bit TIFF File with the corresponding 8-bit TIFF File by using a comparison tool to ensure that the contents of the transcription printing File and the high-precision PDF editing File are consistent, and storing the corresponding typesetting source file, the high-precision PDF editing file, the transformational printing file and the corresponding 8-bit TIFF file into a typesetting resource master library.

Furthermore, by a system consisting of a printed file auditing module, a printed file distributing module and a printed file downloading module, the auditing matching, uniqueness encryption, validity setting, task distribution, downloading decryption and TIFF file comparison of the printed files are realized, and a publishing unit edits a signature sample through the printed file auditing module according to responsibility to audit whether each part corresponding to the printed variety is complete and consistent or not; secondly, distributing the printed files and the corresponding 8-bit TIFF files to different printing enterprises as required through a printed file distribution module, generating encrypted printed file copies matched with the printing enterprises one by one through an encryption and decryption technology, and setting the validity period of the files; thirdly, downloading the encrypted printing file and the 8-bit TIFF file through a printing file downloading module, decrypting and verifying the integrity of the encrypted printing file, and generating a new 8-bit TIFF file locally according to the decrypted printing file; and fourthly, comparing the downloaded 8-bit TIFF file with the locally generated 8-bit TIFF file by using a comparison tool, and ensuring that the content of the printed file is kept unchanged after the printed file is locally analyzed.

Furthermore, the comparison tool comprises a first step of importing the 8-bit TIFF file for comparison and the 8-bit TIFF file to be compared into the comparison tool; secondly, generating two corresponding page picture files from the 8-bit TIFF format files used for comparison and to-be-compared; thirdly, extracting key feature points on the two page pictures through an SIFT function, correcting offset, and aligning the plate centers of the two pictures; fourthly, converting the two pictures with the offset adjusted into corresponding dot matrix maps; fifthly, performing three-time image graying and Gaussian smoothing on the two dot matrix maps respectively, obtaining data corresponding to the image dot matrix maps after processing, and converting the dot matrix data into a 24-bit RGB byte array; sixthly, calculating whether the absolute value of the difference value of the R components of the corresponding pixel positions of the two images is greater than a set standard threshold value or not, and whether the absolute value of the difference value of the G components is greater than the set standard threshold value or not, and if at least one of the difference values meets the condition, marking as a difference point; the seventh step of respectively carrying out color value depth processing with set percentage on the two groups of images, calculating difference points of the images according to a set threshold value, and obtaining a difference frame formed by the position collection of all the difference points on the images; eighthly, carrying out binarization processing on the two pictures with the offset adjusted for the second time according to a preset percentage, and converting the pictures into corresponding dot matrix maps; the ninth step is repeated with the fifth, sixth and seventh steps, and a difference frame formed by the position set of the new difference points on the image is calculated; and tenth, combining the difference frame obtained by the calculation in the seventh step with the difference frame obtained by the calculation in the ninth step, obtaining a finally displayed difference frame after the combination algorithm processing, judging whether the area of the difference frame exceeds a set threshold value, if so, prompting the system to further verify, and if not, prompting the system to have an accurate comparison result.

Furthermore, the encryption and decryption method is characterized in that acquisition of relevant parameters of the back-end equipment characteristics, the operating system and the network environment is added in the algorithm of the conventional secret key, assignment and verification of the internal structure of the printed file are carried out, normal use of the encryption software in the predicted associated hardware and software is realized through a kernel device driving mode, and once the file leaves the predicted environment and hardware, the file automatically fails.

Furthermore, the encryption and decryption method realizes the encryption and decryption authorization of the printing files, creates a unique encrypted printing file for each printing enterprise, and can be downloaded and used only on a computer authorized by the printing enterprise; by setting a time limit lock on the printed document, it can only be used within an authorized time, and beyond the authorized time period, the document is automatically invalidated.

Further, a quality control system for output version files based on open network transmission is provided, which comprises: the printing system comprises a calibration file management system and a printing file management system, wherein the calibration file management system comprises a calibration file uploading module and a calibration file management module; the printing file management system comprises a printing file auditing module, a printing file distributing module and a printing file downloading module; and a database supporting the system data storage to ensure operation; the system also comprises a comparison tool embedded in the compilation file uploading module, the compilation file management module and the printing file downloading module, and can realize the open-based network transmission output version file quality control method.

Furthermore, the compilation file management module converts the compilation file into a conversion printing file and simultaneously generates an 8-bit TIFF file; the quality of the printed file is more stable than that of the edited file after the file is bent, and the precision of the printed file can be used for printing; the quality of the 8-bit TIFF file is more stable than that of the bent printed file, but the precision of the TIFF file cannot be used for printing and can only be used for displaying; the converted printing file is used as a file for printing production to carry out network transmission, and the 8-bit TIFF file is only used as a reference file for comparing whether the printing file is changed after rasterization processing.

Furthermore, the printing file rasterization processing, namely RIP technical processing, is a key technology in the printing field, and the main function of the technology is to parse a PDF format file into a dot matrix file (dot file) meeting printing, decompose file color information into corresponding four-color file information, and finally generate a color separation dot matrix file meeting four-color printing production. Because the process of manufacturing the printed file and the software and hardware environment used by the process are different from the software and hardware environment of rasterization processing of a printing enterprise, errors can easily occur in the contents of the rasterized file. The key technology of the invention is to transmit a stable 8-bit TIFF file through a network and verify that the content of the downloaded printing file is unchanged after rasterization processing by using a comparison tool.

Compared with the prior art, the quality control method and the control system based on the open network transmission and output version file provided by the invention at least have the following advantages:

1. and establishing a remote editing and calibrating production service platform through the editing and calibrating file management system. Each line of plate-making enterprises use the platform to upload and download the relevant files of plate-making, thereby realizing the network security transmission and storage of the relevant files of plate-making across areas and realizing the electronic file comparison among all proofreading times of the plate-making enterprises. The quality standard of each line of plate-making enterprises can be unified and standardized, effective management of each line of plate-making enterprises can be realized, and the plate-making quality can be improved. Meanwhile, each publishing unit establishes a typesetting resource master library through the platform, so that the digitization level of book products of the publishing units and the reutilization efficiency and value of digital resources are improved.

2. And generating a safe and stable printing file and an 8-bit TIFF file through a reduplication file management module, and establishing a printing file resource master library. The publishing unit generates a transfer printing file for the editing and correcting files uploaded by each row of plate-making enterprises, the transfer printing file is safer and more stable than the editing and correcting files, and the environmental adaptability of the rear-end production of the printing file is improved; comparing the file before and after the file is turned by using a comparison tool to ensure that the content of the printed file after the file is turned is correct; the 8-bit TIFF file generated by utilizing the compiled file is safer and more stable than a bent printed file, is theoretically not changed due to the change of software and hardware environments, is the safest and most stable file format acknowledged by the printing industry, but has low file precision and cannot meet the requirement of back-end printing production, but can replace an edited signature paper draft as a reference file of a back-end printing production end. Meanwhile, the printing files and the 8-bit TIFF files are stored in a printing resource master library, so that the safe and efficient management of a publishing unit on the printing files of the book products is improved.

3. The printing file is encrypted and effectiveness control is realized through the printing file distribution module. The publishing unit utilizes the client to call the required file from the printing resource master library, encrypts the file according to the requirement to generate encrypted printing file copies matched with the printing enterprises one by one, and fills the effective time of the encrypted file, thereby realizing the encryption and time effectiveness control of the printing file and solving the problem that the publishing unit is out of control in managing the printing file provided for the printing enterprises in reality.

4. And the comparison tool of the printing file downloading module ensures that the content quality of the printing file is stable. And the printing enterprise generates an 8-bit TIFF file from the downloaded and decrypted printing file, compares the 8-bit TIFF file with the downloaded and decrypted TIFF file, and verifies whether the printing file can safely and stably output the printing plate in the software and hardware environment of the printing enterprise. In the prior art, a paper pattern is printed after a printing file is subjected to rasterization processing, and workers are arranged to correct the paper pattern with an edited signature type paper, so that an output printing plate of the printing file is ensured to be correct. Therefore, the invention not only saves manpower and material resources, but also improves the quality of printed documents and the publishing and printing efficiency.

5. The embedded comparison tool meets the requirement of the printing and publishing on page information comparison and verification, the comparison between the compiled and calibrated files and the printed file and the stable 8-bit TIFF file is realized, the comparison between the compiled and calibrated files and the stable 8-bit TIFF file can be used for comparing the compiled and calibrated files before and after in the compiling and calibrating process, a content quality control method is provided for the publishing and printing industry, and the working efficiency of the publishing and printing industry is further improved.

6. By building a network transmission output version file quality control system, the problems of disorder, irregularity and non-standard unification of plate-making enterprises at present are solved, the problems of safe storage and effective management of plate-making resources and printing resources of publishing units are solved, the problems of copyright protection and effectiveness control of the printing files of the publishing units are solved, information barriers of the plate-making enterprises, the publishing units and the printing enterprises are opened, efficient and stable transmission of the resources is achieved, and the development of the publishing and printing industries towards the direction of informatization, digitization, standardization and greenization is effectively promoted.

The advantages of the present invention are, of course, many, but not all, of the advantages described above are necessarily achieved by the method and product of the present invention.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.

The structure, proportion, size and the like of the drawings in the specification are only used for matching with the content disclosed in the specification, so that those skilled in the art can understand and read the description, and the limitation conditions that the invention can be implemented are not limited, so that the essence of the technology is not provided, and any structural modification, proportion relation change or size adjustment can still fall within the scope covered by the technical content disclosed by the invention without affecting the effect and the purpose which can be achieved by the invention.

Fig. 1 is an overall flowchart of a quality control method for a network-transmitted and output version file.

FIG. 2 is a flow chart of a remote redaction production service platform.

Fig. 3 is a flowchart of editing file uploading and management.

Fig. 4 is a flow chart of the verification, distribution and download of printed documents.

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. The embodiments described below are only a part of the embodiments of the present invention, and not all of them. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "comprises/comprising," "consists of … …," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a product, apparatus, process, or method that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such product, apparatus, process, or method if desired. Without further limitation, an element defined by the phrases "comprising/including … …," "consisting of … …," or "comprising" does not exclude the presence of other like elements in a product, device, process, or method that comprises the element.

Referring to fig. 1, fig. 1 discloses an overall flow chart of a quality control method for network-transmitted output files, which is applied to a redacted file management system and a printed file management system, wherein the redacted file management system comprises a redacted file uploading module and a redacted file management module; the printing file management system comprises a printing file auditing module, a printing file distributing module and a printing file downloading module; the verification system also comprises a comparison tool embedded in the editing file uploading module, the editing file management module and the printing file downloading module, the uploading, downloading, printing and scanning of the editing file are completed through the editing file management system, the network security transmission at different places is realized, the comparison tool is used for comparing the editing file of the previous and subsequent times of verification, the verification and the correction are correct, and the editing and the correction work of the first three times of verification and the first check before printing is completed; after the editing and calibration work is finished, the final typesetting source file and the high-precision PDF editing and calibration file are uploaded to an editing and calibration file management system by the layout and plate making enterprise through an editing and calibration file uploading module; the editing and correcting file management module downloads a final typesetting source file and a high-precision PDF editing and correcting file uploaded by an audit typesetting and plate-making enterprise, converts the high-precision PDF editing and correcting file into a conversion printing file, generates 8 TIFF files corresponding to the high-precision PDF editing and correcting file and the conversion printing file, and stores the TIFF files into a typesetting and plate-making resource master library; the printing file auditing module audits the transformated printing files and the 8-bit TIFF files corresponding to all the components of the printing variety, and stores the files into a printing resource master library after the audit is passed; the printing file distribution module generates an encrypted file copy from the required bent printing file and the 8-bit TIFF file and sets validity, wherein the validity comprises file use permission and valid time; the printing file downloading module downloads the encrypted file copy, decrypts the downloaded encrypted file copy to obtain a decrypted transferred printing file and an 8-bit TIFF file, and generates the decrypted transferred printing file into the 8-bit TIFF file after the validity condition is met; and comparing the generated 8-bit TIFF file with the decrypted 8-bit TIFF file by using a comparison tool, and judging whether the received download file can be used for printing according to a comparison result, so that the quality of the print file for printing production is ensured to be stable, and the print quality is convenient to control.

Referring to fig. 2, the invention discloses an implementation mode and principle of a remote editing and correcting production service platform:

and reading the selected question information to create a variety by the typesetting and platemaking enterprise through a webserver interface. The file is uploaded to a server by using a Socket through a TCP/IP protocol, and the implementation principle is as follows: the server side starts to monitor the appointed port after starting. The client divides the file to be uploaded into a plurality of blocks with equivalent sizes, and sends a file transmission request to an appointed port of the IP of the server and attaches size and position information of a transmission data block. And the server stores the received data into a cache file after receiving the database and sends the information of successful receiving to the client. And after receiving the sending success information, the client side continues to transmit the next data block until the whole file transmission is completed. The server changes the cache file into a formal file. So far the whole transmission process is finished. If the network is interrupted in the transmission process, the client cannot receive the successful data block receiving information sent by the server, and the client repeatedly sends the transmission request of the current data block until the server responds to continue to transmit data.

The publishing unit receives the uploaded editing and calibrating file through the editing and calibrating file management module, uploads the calibration file to the plate arranging and making enterprise if the calibration file is changed after the responsibility editing and verifying, performs calibration and modification after the plate arranging and making enterprise downloads the calibration file, and uploads the calibration file to the publishing unit again after the calibration and modification. And the responsibility edition again audits the edited file, if the edited file is modified, the operation is continuously repeated, and if the edited file is not modified, the edited file is signed. After seeing the responsibility edition signature payment type, the publishing unit transmits a high-precision PDF editing file corresponding to the variety and a source file into a layout resource master library to finish remote editing and digital resource warehousing work of the publishing unit.

Referring to fig. 3, the present invention discloses an implementation and principle of redacted file management:

the publishing unit receives the final source file and the high-precision PDF editing file uploaded by the plate-making enterprise through the editing and correcting file management module, the high-precision PDF editing and correcting file is converted to generate a conversion printing file, and an 8-bit TIFF file corresponding to the high-precision PDF editing and correcting file and the conversion printing file is generated, the stability of the converted printing file is higher than that of the high-precision PDF file and can meet the printing technical requirements, and the stability of the 8-bit TIFF file is higher than that of the converted printing file but can not meet the printing technical requirements. And comparing the 8-bit TIFF files generated before and after the transfer by using an embedded comparison tool (the TIFF format is identified and the PDF format is not identified by the comparison tool), and ensuring that the contents of the printed file generated by the transfer are consistent with those of the redacted file. The generated 8-bit TIFF file has stable quality, does not change along with the change of software and hardware environments, is the most safe and stable file format in the field of publishing and printing, is transmitted to a printing enterprise through a network, and is used as a reference file to verify the correctness of the 8-bit TIFF file generated by the printing file downloading module, so that the printing quality is finally ensured. After the comparison shows that the converted printed file is correct, the publishing unit transmits the source file, the high-precision PDF editing and correcting file, the converted printed file and the 8-bit TIFF file which the printed matter belongs to a layout and plate making resource master library through the editing and correcting file management module, and the remote editing, correcting, layout and plate making and related digital resource warehousing work of the publishing unit are completed.

The comparison tool embedded in the method is an important content of the invention. The comparison tools in the market at present compare the comparison picture with the compared picture one by one, or adjust the difference size by the threshold of the number of the difference pixels, but the method does not perform optimization processing on the image processing algorithm, so that the practical application is difficult. For example, in actual production, due to differences of typesetting software of printed documents, a generation mode of the printed documents and RIP equipment at the rear end of the printed documents, more random pixel level changes occur in the content of the printed documents, and the changes even relate to changes of each pixel value, but the changes are not in a range distinguishable by human eyes, so that false alarm is easily caused, the comparison efficiency is seriously affected, and the wide application in production is difficult. The comparison tool is developed on the basis of continuously optimizing an image algorithm in practice, and the principle of the comparison tool is as follows:

firstly, converting a PDF page into a picture file; secondly, the images to be compared may have offset on positions, key feature points of the images are extracted through an SIFT function, the offset is corrected, and the plate centers of the two images are aligned.

Secondly, converting the two pictures with the offset adjusted into corresponding dot-matrix maps; secondly, carrying out three-time image graying and Gaussian smoothing treatment on the two dot matrix maps respectively, wherein a two-dimensional Gaussian function is as follows:

obtaining data corresponding to the image bitmap after processing, and converting the bitmap data into a 24-bit RGB byte array; and calculating whether the absolute value of the difference value of the R components of the corresponding pixel positions of the two images is greater than the set standard threshold value or not, and whether the absolute value of the difference value of the G components is greater than the set standard threshold value or not, and if at least one of the difference values meets the condition, marking as a difference point.

Thirdly, sequentially calculating all difference points of the image from left to right and from top to bottom in a circulating manner; secondly, color value depth processing with set percentage is carried out on the two groups of images respectively, difference points on the images are calculated according to set threshold values, and a difference frame formed by the position collection of all the difference points on the images is obtained.

Fourthly, firstly, carrying out binarization processing on the two pictures with the offset adjusted according to a preset percentage, and converting the specific binarized pictures into corresponding dot matrix maps; and secondly, repeating the second step and the third step by a subsequent calculation method, and finally calculating to obtain a difference frame formed by the position set of all difference points on the image.

And fifthly, combining the difference frame obtained by the third step with the difference frame obtained by the fourth step, wherein a combination algorithm is to judge whether the two frames are intersected or not, if the two frames are intersected, the abscissa X of the new difference frame is the smaller X value, the total coordinate Y is the smaller Y value, the width is the smaller X value +2 times the width of the difference frame- (the smaller X value + the width of the difference frame-the larger X value), the height is similar to the wide algorithm, if the two frames are not intersected, the combination calculation is carried out, the difference frame finally displayed is obtained after the combination algorithm processing, and whether the downloaded printing file can be used for printing production or not is determined according to the size of the difference frame. Optionally, whether the area of the difference frame exceeds a set threshold is judged, if the area exceeds the set threshold, the difference is large, the system prompt needs to be further verified, and if the area does not exceed the set threshold, the comparison result of the system prompt is acceptable, and whether the area can be used for publishing and printing is further judged.

Through the steps, the final difference frame is obtained through plate center correction, picture graying processing, picture outline smoothing processing, difference point threshold value setting and two times of difference point calculation on the picture and combination calculation. The method effectively solves the problems of error report of difference points and low comparison efficiency in the prior comparison technology, ensures the accuracy and high efficiency of the comparison result, and technically ensures the network transmission quality of the published files.

Referring to fig. 4, the present invention discloses one embodiment and principle of printed document auditing:

the publishing unit checks the variety which is put in storage through the printed file auditing module, and can search the variety and parts which need to be audited by using metadata such as material numbers, book numbers and the like. And a verification leader of a publishing company downloads the transcription printing file to a system cache area through the FTP server, calls local FTP reading software to open the printing file, verifies the content of the printing file of each component and matches the corresponding components, thereby ensuring that each component, such as a cover, a text, an insert, an album and the like, corresponding to the variety is complete. And confirming that the checked and correct file enters a printing resource master library to prepare for network transmission of the printing file. And the printing files which do not pass the examination are rejected to a plate-making enterprise, and the uploading procedure is repeated after the printing files are re-made.

With continued reference to FIG. 4, the present invention discloses one embodiment and principle of printed document distribution:

and inquiring varieties to be printed in the printing resource master library by a publishing and printing management user through a webserver interface, and reading the metadata of the printing files to create printing varieties. And calling a webserver interface to acquire an FTP download path of the file to be printed, and downloading the transferred printing file and the corresponding 8-bit TIFF file to a file download server. The method for separating the file downloading server from the resource master library protects the safety of the resource master library to the maximum extent.

A publishing printing management user distributes printing varieties to printing factories, a printing file distribution module automatically generates encrypted file copies corresponding to printing enterprises, and how many printing factories can create how many encrypted copies, each printing factory is different, so that one factory can be ensured to be encrypted, encrypted files can be prevented from being exchanged among the printing factories, and hackers can be prevented from obtaining encrypted characteristics by analyzing the encrypted files. The encryption process has three locks, namely a hardware information lock, a software information lock and a time limit lock:

1. the hardware information lock is used for encrypting the printing file by taking the hardware characteristics of computers of appointed distribution printing factories as keys, and if the encrypted file is opened on a non-appointed computer, the encrypted file cannot be decrypted.

2. The software information lock contains a software white list which allows the file to be operated in each encrypted file, and if the software which tries to open the file is not in the white list, the software is messy even if the software is opened, and decryption processing is not carried out.

3. The third lock is a time limit lock, each encrypted file has a valid use time, and after the time limit, the encrypted file cannot be opened even by correct software on a correct computer, and a printing enterprise is required to perform safe downloading within a set date.

Through the triple encryption mechanism, the maximum limited printed file is spread by pirated copy, the copyright is effectively protected, and meanwhile, the effective control on the printed file is realized by limiting the effective period of the printed file through the time lock.

In addition, a watermark which is different according to different printing factories is arranged in each encrypted file, the watermark cannot be operated in normal use, but once piracy occurs, the file can be traced according to the watermark, and the traceability of file leakage is improved.

The file encryption algorithm adopts a combination mode of multiple symmetric encryption algorithms, so that the decryption speed is ensured, and the adopted algorithm cannot be easily analyzed. The file encryption adopts a transparent encryption technology, and has the advantages that the file is always in an encrypted state in the transmission process and the storage state, the file can be automatically decrypted only when the file is opened by using specified software on a specified machine within specified time, and the file is still in an encrypted state after the software is closed. The implementation principle is that when the file is encrypted, the encryption program does not write the file content on the user level, but writes the file on the windows kernel level through the drive technology. The kernel-level code is not accessed through the API when the file content is read, but the encrypted file is decrypted when the encrypted file is read into the memory by using a driving technology, so that the file data can be read by authorized software recorded in the file at the moment. And when the file is stored, the decrypted plaintext is encrypted again and stored in the storage medium.

With continued reference to FIG. 4, the present invention discloses one embodiment and principle of print file download:

the method comprises the steps that a user does not need to participate in the decryption process of the file, when the file is opened and written into a memory, a hardware information lock of the file is read to judge whether a machine for opening the file is authorized or not, if the file is the authorized machine and the current time is also within the time lock limit of the file, the file is written into the memory, then the file is opened by using authorized software, and otherwise the file is failed to be opened.

After the printing enterprise downloads the printing file and the 8-bit TIFF file, the MD5 code of the file to be calculated is compared with the MD5 code of the file stored by the download server, so that the safety and the integrity of file downloading are ensured.

And the files with the validity set comprise file use permission and valid time. When the file is decrypted, the use authority and the valid time of the file are judged at first, and the file can be operated after the file meets the requirements of the time and the authority; secondly, limiting private arrangement printing after the printing enterprise is beyond the effective period through effectiveness setting; and the problem of pirating caused by outflow of the file is prevented again, so that effective management and control of the printed file are realized to a certain extent, and the copyright of the printed product is protected.

The printing enterprise downloads the encrypted printing file and the 8-bit TIFF file copy through the printing file downloading module, decrypts the encrypted printing file to generate an 8-bit TIFF file, wherein the 8-bit TIFF file is consistent with the content of a printing plate file output by rasterization processing of the printing enterprise, and the downloaded 8-bit TIFF file is consistent with the content of a paper draft file signed by responsibility edition. The comparison tool used in embodiment 2 is used to compare the generated 8-bit TIFF file with the downloaded 8-bit TIFF file, and determine whether the generated 8-bit TIFF file is correct according to the size of the difference frame displayed by the comparison result, if the size of the difference frame is smaller than the standard threshold, the generated 8-bit TIFF file is consistent with the downloaded 8-bit TIFF file, and further determine that the printing plate file output by the printing enterprise rasterization processing is consistent with the paper draft file content of the responsibility editing signature, thereby further ensuring that the book content of the printing production is consistent with the content of the responsibility editing signature, and realizing quality control on the network transmission output file.

The present invention and its embodiments have been described above, and the description is not intended to be limiting, and the drawings are only one embodiment of the present invention, and the actual structure is not limited thereto. In summary, those skilled in the art should appreciate that they can readily use the disclosed conception and specific embodiments as a basis for designing or modifying other structures for carrying out the same purposes of the present invention without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A quality control method based on open network transmission output version files is applied to a compilation file management system and a printing file management system, wherein the compilation file management system comprises a compilation file uploading module and a compilation file management module; the printing file management system comprises a printing file auditing module, a printing file distributing module and a printing file downloading module; wherein the editing and correcting file uploading module, the editing and correcting file management module and the printing file downloading module are embedded with comparison tools; the method is characterized by comprising the following steps:

s10: uploading, downloading, printing and scanning of the editing and calibrating files are completed through the editing and calibrating file management system, remote network safe transmission is realized, the editing and calibrating files of the previous and subsequent calibration times are compared by using a comparison tool, the verification and the correction are correct, and the editing and calibrating work of the first three proofings and the first check before printing is completed; after the editing and calibration work is finished, the final typesetting source file and the high-precision PDF editing and calibration file are uploaded to an editing and calibration file management system by the layout and plate making enterprise through an editing and calibration file uploading module;

s20: the editing and correcting file management module downloads a final typesetting source file and a high-precision PDF editing and correcting file uploaded by an audit typesetting and plate-making enterprise, converts the high-precision PDF editing and correcting file into a conversion printing file, generates 8 TIFF files corresponding to the high-precision PDF editing and correcting file and the conversion printing file, and stores the TIFF files into a typesetting and plate-making resource master library;

s30: the printing file auditing module audits the transformated printing files and the 8-bit TIFF files corresponding to all the components of the printing variety, and stores the files into a printing resource master library after the audit is passed;

s40: the printing file distribution module generates an encrypted file copy from the required transfer printing file and the 8-bit TIFF file and sets validity, wherein the validity comprises file use permission and valid time;

s50: the printing file downloading module downloads the encrypted file copy, decrypts the downloaded encrypted file copy to obtain a decrypted transferred printing file and an 8-bit TIFF file, and generates the decrypted transferred printing file into the 8-bit TIFF file after the validity condition is met;

s60: and comparing the 8-bit TIFF file generated in the step S50 with the decrypted 8-bit TIFF file by using a comparison tool, and judging whether the received download file can be used for printing according to a comparison result, so that the quality of the print file for printing production is ensured to be stable, and the print quality is convenient to control.

2. The method according to claim 1, wherein in step S10, the typesetting and platemaking enterprise downloads the paper document for printing responsibility edition modification through the edition document uploading module, typesets according to the edition modification line, and uploads the edition document after completion of the typesetting; the publishing unit carries out metadata setting, authority setting and technical parameter setting on the editing and correcting file through the editing and correcting file management module, downloads the editing and correcting file uploaded by the printing and typesetting and platemaking enterprise, transfers responsibility edition to carry out correction, scans the draft of responsibility edition correction and uploads the draft to be transmitted back to the typesetting and platemaking enterprise through network transmission, and the three-correction one-core editing and correcting work is completed.

3. The method according to claim 1, wherein in step S20, the publishing entity generates a transcription print file by transcribing the high-precision PDF transcription file through the transcription file management module, then generates a corresponding 8-bit TIFF file by the high-precision PDF transcription file and the transcription print file, compares the two corresponding 8-bit TIFF files by using a comparison tool, and stores the layout source file, the high-precision PDF transcription file, the transcription print file and the corresponding 8-bit TIFF file into the layout resource library.

4. The method according to claim 1, wherein in step S30, the storing of the file into the printing resource total library after the audit is passed includes: and editing the signature sample by the printed file auditing module according to the responsibility to audit whether all the parts corresponding to the printed variety are complete and consistent.

5. The method according to claim 1, wherein in step S40, the print file distribution module generates an encrypted file copy from the required transfer print file and the 8-bit TIFF file and performs validity setting, where the validity includes file usage right and validity time, and specifically includes: the method comprises the steps of distributing a required bent printing file and an 8-bit TIFF file corresponding to the bent printing file to different printing enterprises as required through a printing file distribution module, generating encrypted printing file copies matched with the printing enterprises one by one through an encryption and decryption technology, and setting file use permission and effective service life.

6. The method according to claim 1, wherein step S50 further comprises: the encrypted transferred print file and the 8-bit TIFF file copy are downloaded through the print file downloading module, the encrypted print file is decrypted and integrity is verified, and meanwhile, a new 8-bit TIFF file can be locally generated according to the decrypted print file.

7. The method of claim 1, wherein in step S60, the specific implementation manner of the comparison tool is as follows:

step one, importing 8-bit TIFF files for comparison and 8-bit TIFF files to be compared into a comparison tool, wherein the 8-bit TIFF files for comparison are decrypted 8-bit TIFF files, and the 8-bit TIFF files to be compared are generated 8-bit TIFF files;

secondly, generating two corresponding page picture files from the 8-bit TIFF format files used for comparison and to-be-compared;

thirdly, extracting key feature points on the two page pictures through an SIFT function, correcting offset, and aligning the plate centers of the two page pictures;

fourthly, converting the two page pictures with the offset adjusted into corresponding dot matrix maps;

fifthly, performing three-time image graying and Gaussian smoothing on the two dot matrix maps respectively, obtaining dot matrix map data of corresponding images after processing, and converting the dot matrix map data into a 24-bit RGB byte array;

sixthly, calculating whether the absolute value of the difference value of the R components of the corresponding pixel positions of the two images is greater than a set standard threshold value or not, and whether the absolute value of the difference value of the G components is greater than the set standard threshold value or not, and if at least one of the difference values meets the condition, marking as a difference point;

seventhly, performing color value depth processing on the two images in a set percentage respectively, calculating difference points of the images according to a set threshold value, and obtaining a difference frame formed by position aggregation of all the difference points on the images;

eighthly, carrying out binarization processing on the two page pictures with the offset adjusted according to a preset percentage, and converting the two page pictures into corresponding dot matrix maps;

the ninth step, repeat the fifth, sixth, seventh step, calculate and get the difference frame that the position set of new difference point forms on the picture;

and tenth, combining the difference frame obtained by the calculation in the seventh step with the difference frame obtained by the calculation in the ninth step, obtaining a final difference frame after the processing of a combination algorithm, judging whether the area of the final difference frame exceeds a set threshold value, if so, prompting the system to further check, and if not, prompting the system to have an accurate comparison result.

8. The method according to claim 1 or 6, characterized in that the encryption and decryption method is to add the collection of the relevant parameters of the backend equipment, the operating system and the network environment and the assignment and verification of the internal structure of the printed file in the algorithm of the conventional key, realize the normal use of the encryption software in the pre-known associated hardware and software through the kernel device driving mode, and automatically disable the file once leaving the pre-known environment and hardware.

9. The method of claim 8, wherein the encryption and decryption method encrypts and decrypts print documents, creates unique encrypted print documents for each printing enterprise, and is only available for download and use on the computer authorized by the printing enterprise; a time limit lock is arranged on the printed file, the printed file can be used only within the authorized time, and the file is automatically invalid when the authorized time period is exceeded.

10. An open network transmission output file-based quality control system, which is applied to the open network transmission output file-based quality control method according to any one of claims 1 to 9, and is characterized by comprising the following steps:

the editing and correcting file management system is provided with an editing and correcting file uploading module and an editing and correcting file management module;

the printing file management system is provided with a printing file auditing module, a printing file distributing module and a printing file downloading module;

the comparison tool is embedded in the editing and correcting file uploading module, the editing and correcting file management module and the printing file downloading module; and

and the database is used for storing data to support the operation of the system.