CN111724385A - Ink-jet printing added altered file identification system and method based on satellite ink dots - Google Patents
Ink-jet printing added altered file identification system and method based on satellite ink dots Download PDFInfo
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Abstract
The invention discloses a satellite ink dot-based ink-jet printing additive altered file identification system and method, which relate to the field of file verification and comprise the following steps: the system comprises a data management module, a database and a data processing module; the data management module is respectively connected with the query unit and the tool management unit in the data processing module; the data management module is used for acquiring the sample file and extracting satellite ink dot information of the sample file; the database is respectively connected with the data management module, the query unit and the tool management unit; the query unit is used for comparing the satellite ink dot information of the sample file with the satellite ink dot information of the normal file to obtain ink jet printer information related to the satellite ink dot information of the sample file; the tool management unit is used for judging whether the sample file is added with the altered file or not according to the satellite ink dot information and the ink jet printer information of the sample file. The invention can realize accurate and rapid identification on whether the altered files are added.
Description
Technical Field
The invention relates to the field of file verification, in particular to an ink-jet printing adding altered file identification system and method based on satellite ink dots.
Background
The altered document is a fake document produced by altering the content or appearance of the original document by various counterfeiting means on the basis of the original document. Various types of added modified files are a material evidence frequently encountered in judicial practice, and modification of file contents through adding printing to form false files is a typical modified file mode. Different from the randomness and convenience of adding and changing handwritten files, the addition of printed files is more difficult and has high requirements. The identification of the printing rules is used to judge whether the printed document is altered, which plays an increasingly important role in investigation and solution, court actions and trial.
Printing and adding the altered files is the most difficult class in adding the altered files, and is always the key and difficult point for research of court science technicians. In the past, research mainly focuses on printing and adding a modified file, a series of inspection technologies and methods are formed, and the effect is obvious. In recent years, with the intensive research on the printing of gear marks on printed documents, color laser printing of secret mark tracking codes, satellite ink dots, printing modes, printing of stepping characteristics and the like, new inspection technologies and methods are provided and explored for inspection and identification of addition type printed altered documents, and great progress is made in the aspect of identifying the printed altered documents. Court scientists have focused their attention on analyzing the layout distribution of documents, the morphological characteristics of ink marks, the components of ink marks, and the like, and have examined them by methods such as direct observation, microscopic comparison, image software processing, component analysis, and the like. This is a commonly used test method by professionals. However, the characteristics of the inkjet printed document in the previous research are not sufficiently described, and the fact of how to grasp and use the operating rules of the printing head, the characteristics of the satellite ink dots, and the like to determine whether the document is altered is not reported. Meanwhile, if the added files have obvious differences in the characteristics of pigment components, colors, forms, editing and typesetting and the like, the modified files are easy to judge, and if the added files have no obvious differences, the added files are difficult to identify. The fact that the printing altered file is added is difficult to be fully disclosed only by the technical means, and misjudgment is easy to occur, so that the popularization and the application of the technology are not facilitated. The identification of the alteration fact is limited by the limitation of the inspection method of the ink-jet printing alteration document, and an inquiry and identification system does not solve the problems, so that a method for identifying the ink-jet addition printing alteration document which is standard, simple, convenient, effective and reliable is urgently needed to ensure the implementation of the identification of the alteration document.
Disclosure of Invention
The invention aims to provide a satellite ink dot-based ink-jet printing added altered file identification system and method so as to realize accurate and rapid identification on whether an altered file is added.
In order to achieve the purpose, the invention provides the following scheme:
a satellite ink dot based ink jet printing additive altered document authentication system comprising:
the system comprises a data management module, a database and a data processing module; the data processing module comprises a query unit and a tool management unit;
the data management module is respectively connected with the query unit and the tool management unit; the data management module is used for acquiring a sample file and extracting satellite ink dot information of the sample file;
the database is respectively connected with the data management module, the query unit and the tool management unit; the database is used for storing satellite ink dot information of a normal file; the normal file is a file without added alteration;
the query unit is used for comparing the satellite ink dot information of the sample file extracted by the data management module with the satellite ink dot information of the normal file stored in the database to obtain the ink jet printer information related to the satellite ink dot information of the sample file;
the query unit is also connected with the tool management unit; the tool management unit is used for judging whether a modified file is added to the sample file according to the satellite ink dot information of the sample file extracted by the data management module and the ink jet printer information obtained by the query unit.
Optionally, the tool management unit includes a composition judgment subunit and an operation rule judgment subunit;
the typesetting judgment subunit is used for judging whether the sample file is typeset normally according to the satellite ink dot information of the sample file; the satellite ink dot information comprises a satellite ink dot direction, a satellite ink dot size and a satellite ink dot distance value;
the operation rule judging subunit is used for calculating printer operation rule information according to the satellite ink dot information of the sample file when the sample file is normally typeset, and judging whether a modified file is added to the sample file or not according to the printer operation rule information and the ink jet printer information related to the satellite ink dot information of the sample file;
the operation rule judging subunit is further configured to output the sample file addition altered file when the sample file is not typeset normally.
Optionally, the satellite ink dot-based inkjet printing additive modification document authentication system further includes:
a system login module;
the system login module is used for performing identity verification and logging in the inkjet printing and additive alteration file identification system based on the satellite ink dots after the identity verification is successful.
Optionally, the satellite ink dot-based inkjet printing additive modification document authentication system further includes:
a print data module;
the printing data module is respectively connected with the query unit and the tool management unit; the printing data module is used for outputting a judgment result of whether the sample file is added with the altered file and the information of the ink jet printer related to the satellite ink dot information of the sample file; the inkjet printer information includes: the satellite ink dot characteristic graph of the ink-jet printer, the Chinese name of the ink-jet printer, the Chinese brand name of the ink-jet printer, the English brand name of the ink-jet printer and the model of the ink-jet printer.
Optionally, the query unit includes a preprocessing subunit, a first comparison subunit, a second comparison subunit, a third comparison subunit, and an integration subunit;
the preprocessing subunit is used for preprocessing the satellite ink dot information of the sample file, and identifying the satellite ink dot direction, the satellite ink dot size and the satellite ink dot distance value of the satellite ink dot information of the sample file;
the first comparison subunit is used for comparing the satellite ink dot direction in the satellite ink dot information of the sample file with the satellite ink dot direction in the satellite ink dot information of the normal file in the database to obtain a first comparison result;
the second comparison subunit is used for comparing the satellite ink dot size in the satellite ink dot information of the sample file with the satellite ink dot size in the satellite ink dot information of the normal file in the database to obtain a second comparison result;
the third comparison subunit is configured to compare the satellite ink dot distance value in the satellite ink dot information of the sample file with the satellite ink dot distance value in the satellite ink dot information of the normal file in the database, so as to obtain a third comparison result;
and the integration subunit is used for integrating the first comparison result, the second comparison result and the third comparison result to obtain the information of the ink jet printer related to the satellite ink dot information of the sample file.
A satellite ink dot-based ink-jet printing additive modification file identification method comprises the following steps:
acquiring satellite ink dot information of a sample file;
comparing the satellite ink dot information of the sample file with the satellite ink dot information of the normal file stored in a database to obtain the ink jet printer information related to the satellite ink dot information of the sample file;
and judging whether the sample file is added with a modified file or not according to the satellite ink dot information of the sample file and the ink jet printer information related to the satellite ink dot information of the sample file.
Optionally, the authentication method further includes:
and acquiring the identity information of the user to be logged in, and verifying the identity information of the user to be logged in.
Optionally, the determining, according to the satellite ink dot information of the sample file and the inkjet printer information associated with the satellite ink dot information of the sample file, whether a modified file is added to the sample file specifically includes:
judging whether the sample file is normally typeset according to the satellite ink dot information of the sample file to obtain a first judgment result;
if the first judgment result shows that the sample file is normally typeset, calculating printer operation rule information according to the satellite ink dot information of the sample file, and judging whether a modified file is added to the sample file or not according to the printer operation rule information and the ink jet printer information related to the satellite ink dot information of the sample file;
and if the first judgment result shows that the sample file is not typeset normally, indicating that the sample file is added with a changed file.
Optionally, the calculating, according to the satellite ink dot information of the sample file, printer operation rule information, and determining, according to the printer operation rule information and inkjet printer information associated with the satellite ink dot information of the sample file, whether a modification file is added to the sample file specifically include:
calculating printer operation rule information according to the satellite ink dot direction in the satellite ink dot information of the sample file;
and judging whether the printer operation rule information is matched with the ink jet printer information related to the satellite ink dot information of the sample file to obtain a second judgment result, and if the second judgment shows that the printer operation rule information is not matched with the ink jet printer information related to the satellite ink dot information of the sample file, adding a modified file.
Optionally, the comparing the satellite ink dot information of the sample file with the satellite ink dot information of the normal file stored in the database to obtain the ink jet printer information associated with the satellite ink dot information of the sample file specifically includes:
preprocessing the satellite ink dot information of the sample file, and identifying the satellite ink dot direction, the satellite ink dot size and the satellite ink dot distance value of the satellite ink dot information of the sample file;
comparing the satellite ink dot direction in the satellite ink dot information of the sample file with the satellite ink dot direction in the satellite ink dot information of the normal file in the database to obtain a first comparison result;
comparing the satellite ink dot size in the satellite ink dot information of the sample file with the satellite ink dot size in the satellite ink dot information of the normal file in the database to obtain a second comparison result;
comparing the satellite ink dot distance value in the satellite ink dot information of the sample file with the satellite ink dot distance value in the satellite ink dot information of the normal file in the database to obtain a third comparison result;
and integrating the first comparison result, the second comparison result and the third comparison result to obtain the ink jet printer information related to the satellite ink dot information of the sample file.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects:
the invention provides an identification system and method for an ink-jet printing added altered file based on satellite ink dots. And judging whether the sample file is added with the altered file or not through the tool management unit according to the satellite ink dot information of the sample file extracted by the data management module and the ink jet printer information obtained by the query unit, so that whether the sample file is added with the altered file or not can be accurately and quickly obtained.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
FIG. 1 is a schematic diagram of a satellite ink dot-based ink-jet printing additive alteration document authentication system according to the present invention;
FIG. 2 is a flow chart of a method for identifying a satellite ink dot-based ink-jet printing additive modification document according to the present invention;
FIG. 3 is a schematic diagram of a satellite ink dot-based ink-jet printing additive modification document authentication method according to the present invention;
FIG. 4 is a schematic view of a specific processing flow of the method for identifying a satellite ink dot-based ink-jet printing additive altered document according to the present invention;
FIG. 5 is a diagram of three aspects of satellite ink dots in accordance with the present invention; FIG. 5(a) is a bar chart of satellite dots; FIG. 5(b) is a dot shape diagram of satellite dots; FIG. 5(c) is a cloud-shaped morphology of satellite ink dots;
FIG. 6 is a diagram illustrating a first document to be inspected according to the present invention;
FIG. 7 is a diagram illustrating a second suspect file according to the present invention;
FIG. 8 is a schematic view of a third pending document according to the present invention;
FIG. 9 is a diagram of a first document to be inspected with a layout identifier according to the present invention;
FIG. 10 is a second document to be inspected with a layout identifier in accordance with the present invention;
FIG. 11 is a third pending document with a layout identifier according to the present invention.
Description of the symbols:
the system comprises a database-1, a data management module-2, a query unit-3 and a tool management unit-4.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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.
The invention aims to provide a satellite ink dot-based ink-jet printing added altered file identification system and method so as to realize accurate and rapid identification on whether an altered file is added.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
As shown in fig. 1, the present invention provides a satellite ink dot-based ink-jet printing additive modification document authentication system, which comprises: the system comprises a data management module 2, a system login module, a printing data module, a database 1 and a data processing module; the data processing module comprises a query unit 3 and a tool management unit 4. The tool management unit 4 comprises a typesetting judgment subunit and an operation rule judgment subunit; the query unit 3 comprises a preprocessing subunit, a first comparison subunit, a second comparison subunit, a third comparison subunit and an integration subunit.
The data management module 2 is respectively connected with the query unit 3 and the tool management unit 4; the data management module 2 is used for acquiring a sample file and extracting satellite ink dot information of the sample file.
The database 1 is respectively connected with the data management module 2, the query unit 3 and the tool management unit 4; the database 1 is used for storing satellite ink dot information of normal files; the normal file is a file without added alteration.
The query unit 3 is configured to compare the satellite ink dot information of the sample file extracted by the data management module 2 with the satellite ink dot information of the normal file stored in the database 1, and obtain the ink jet printer information associated with the satellite ink dot information of the sample file.
The query unit 3 is also connected with the tool management unit 4; the tool management unit 4 is configured to determine whether a modified file is added to the sample file according to the satellite ink dot information of the sample file extracted by the data management module 2 and the inkjet printer information obtained by the query unit 3.
The typesetting judgment subunit is used for judging whether the sample file is typeset normally according to the satellite ink dot information of the sample file; the satellite ink dot information comprises a satellite ink dot direction, a satellite ink dot size and a satellite ink dot distance value.
The operation rule judging subunit is used for calculating printer operation rule information according to the satellite ink dot information of the sample file when the sample file is typeset normally, and judging whether a modified file is added to the sample file or not according to the printer operation rule information and the ink jet printer information related to the satellite ink dot information of the sample file.
The operation rule judging subunit is further configured to output the sample file addition altered file when the sample file is not typeset normally.
The system login module is used for performing identity verification and logging in the inkjet printing and additive alteration file identification system based on the satellite ink dots after the identity verification is successful.
The printing data module is respectively connected with the query unit 3 and the tool management unit 4; the printing data module is used for outputting a judgment result of whether the sample file is added with the altered file and the information of the ink jet printer related to the satellite ink dot information of the sample file; the inkjet printer information includes: the satellite ink dot characteristic graph of the ink-jet printer, the Chinese name of the ink-jet printer, the Chinese brand name of the ink-jet printer, the English brand name of the ink-jet printer and the model of the ink-jet printer.
The preprocessing subunit is used for preprocessing the satellite ink dot information of the sample file, and identifying the satellite ink dot direction, the satellite ink dot size and the satellite ink dot distance value of the satellite ink dot information of the sample file.
The first comparison subunit is configured to compare a satellite ink dot direction in the satellite ink dot information of the sample file with a satellite ink dot direction in the satellite ink dot information of the normal file in the database 1, so as to obtain a first comparison result.
The second comparison subunit is configured to compare the satellite ink dot size in the satellite ink dot information of the sample file with the satellite ink dot size in the satellite ink dot information of the normal file in the database 1, and obtain a second comparison result.
The third comparison subunit is configured to compare the satellite ink dot distance value in the satellite ink dot information of the sample file with the satellite ink dot distance value in the satellite ink dot information of the normal file in the database 1, so as to obtain a third comparison result.
And the integration subunit is used for integrating the first comparison result, the second comparison result and the third comparison result to obtain the information of the ink jet printer related to the satellite ink dot information of the sample file.
As shown in fig. 2, the invention also provides a method for identifying a satellite ink dot-based ink-jet printing additive altered document, which comprises the following steps:
step 101: and acquiring satellite ink dot information of the sample file.
Step 102: and comparing the satellite ink dot information of the sample file with the satellite ink dot information of the normal file stored in the database to obtain the ink jet printer information related to the satellite ink dot information of the sample file.
Step 103: and judging whether the sample file is added with a modified file or not according to the satellite ink dot information of the sample file and the ink jet printer information related to the satellite ink dot information of the sample file.
In practical applications, the authentication method further includes: and acquiring the identity information of the user to be logged in, and verifying the identity information of the user to be logged in.
The step 103 specifically includes:
judging whether the sample file is normally typeset according to the satellite ink dot information of the sample file to obtain a first judgment result; if the first judgment result shows that the sample file is normally typeset, printer operation rule information is calculated according to the satellite ink dot information of the sample file, whether a modified file is added to the sample file is judged according to the printer operation rule information and the ink jet printer information related to the satellite ink dot information of the sample file, and if the first judgment result shows that the sample file is not normally typeset, the sample file is added with the modified file.
The step 1032 specifically includes:
and calculating the running rule information of the printer according to the satellite ink dot direction in the satellite ink dot information of the sample file.
And judging whether the printer operation rule information is matched with the ink jet printer information related to the satellite ink dot information of the sample file to obtain a second judgment result, and if the second judgment shows that the printer operation rule information is not matched with the ink jet printer information related to the satellite ink dot information of the sample file, adding a modified file.
The step 102 specifically includes:
and preprocessing the satellite ink dot information of the sample file, and identifying the satellite ink dot direction, the satellite ink dot size and the satellite ink dot distance value of the satellite ink dot information of the sample file.
And comparing the satellite ink dot direction in the satellite ink dot information of the sample file with the satellite ink dot direction in the satellite ink dot information of the normal file in the database to obtain a first comparison result.
And comparing the satellite ink dot size in the satellite ink dot information of the sample file with the satellite ink dot size in the satellite ink dot information of the normal file in the database to obtain a second comparison result.
And comparing the satellite ink dot distance value in the satellite ink dot information of the sample file with the satellite ink dot distance value in the satellite ink dot information of the normal file in the database to obtain a third comparison result.
And integrating the first comparison result, the second comparison result and the third comparison result to obtain the ink jet printer information related to the satellite ink dot information of the sample file.
The invention can rapidly compare whether the characteristics of the ink dot forms, the distances and the like of the satellites of the ink-jet printed files of different brands and models are consistent, and solve whether the suspicious file paragraphs and the normal file paragraphs are printed by the same machine; judging whether the operation rules of the printing head of the ink-jet printer reflected by the suspicious paragraph of the file and the normal paragraph of the file are consistent or not by comparing whether the characteristics of the directions, the fonts, the word sizes and the like of the satellite ink dots of the character painting brushes of the normal paragraph and the suspicious paragraph of the file are different, so as to realize that whether the file is printed and formed at the same time or not by utilizing the characteristics of the satellite ink dots; by utilizing the system to inquire and compare the various element characteristics of the satellite ink dots, such as forms, distances, directions and the like, whether the machine tool brand models of the suspicious file and the database file are consistent or not can be quickly compared, so that whether the file is added or not is revealed.
Specifically, the system login module: installing a relational database management system mysql database on a server; the method comprises the steps of establishing a satellite ink dot feature picture. Establishing a user form and a field thereof, and a satellite ink point characteristic entry form and a field thereof in a picture. Writing a jsp page for connecting a Java program and a picture. And authenticating the user to be logged in.
A data management module: after the identity authentication is successful, acquiring the operation authority of adding, deleting, changing and backing up the database; after data are obtained from a database, inputting satellite ink dot information of a sample file, wherein the satellite ink dot information comprises satellite ink dot forms, satellite ink dot sizes, satellite ink dot distance values, satellite ink dot characteristic graphs of ink-jet printers, Chinese names of the ink-jet printers, Chinese brand names of the ink-jet printers, English brand names of the ink-jet printers and models of the ink-jet printers; providing sorting and data printing functions.
A query unit: according to known elements of satellite ink dot information needing to be inquired, satellite ink dot array value character series connection is carried out on the satellite ink dot information of the input sample file, the graph of a single satellite ink dot in the satellite ink dot information of the input sample file is extracted, the extracted graph is compared with the graphs of satellite ink dots of various brands of a database to be displayed, the appearance graph of the satellite ink dot, the size of the satellite ink dot, the distance value of the satellite ink dot and the like are compared, various numerical values are calculated, and information such as the brand, the model and the source of an ink jet printer related to the satellite ink dot is displayed. The series connection process is to store the input numerical values in a database form and connect the data in a series connection manner. The single satellite ink dot refers to the shape, distance, direction of occurrence and other numerical values of the satellite ink dot. The comparison process is to identify the form, distance and direction firstly, because the forms and distances of the satellite ink dots of the ink-jet printers with different brands and models are different; then, the satellite ink dot information is compared with the satellite ink dot information in the database, and the type identification or the same identification of the machine is carried out.
The forms and distances of the satellite ink dots of the ink-jet printers with different brands and models are different, and the type identification is carried out according to the characteristic values marked by the measurement; the direction of the satellite ink dots is associated with the running direction of the printing head of the printer, and whether the running of the printing head is reasonable or not is judged according to the direction of the satellite ink dots, so that whether the alteration condition of adding printing exists in the suspicious paragraph or not is judged. The calculation is carried out by measuring the distance, observing the form and the direction and inputting the direction by corresponding columns. Finally, the presented result is that whether the judgment of the file to be checked meets the printing operation rule or not, and the system analysis can be carried out on the characteristics of the distance, the form, the direction and the like of the satellite ink dots of the writing of the suspicious segment, so that whether the suspicious segment and the upper and lower segments meet the printer operation rule or not is judged to obtain a comparison result, and the results are provided with four types: determining an additive variation; no additive modifications; there may be additive variations; it cannot be judged.
The ink-jet printing head can print according to the running instruction of the printer, the ink-jet printing head generally sets a meandering track during normal printing, satellite ink dots appear on the left side of a printed stroke when the ink-jet printing head runs leftwards, and on the right side of the stroke when the ink-jet printing head runs rightwards. The satellite ink dots of different brands of ink-jet printers are different in expression form, and some ink dots are in a dot shape, a line shape or a cloud shape.
A tool management unit: marking satellite ink dots of an input sample file, marking and comparing by using a scale tool, judging whether the satellite ink dots of the sample file are in normal typesetting distribution, if the satellite ink dots can be matched, feeding back matching information, entering a microscopic amplification tool, marking and counting observed satellite ink dot forms, satellite ink dot distances and direction characteristics of the satellite ink dots, calculating brand and model numbers of ink-jet printers represented by the satellite ink dot characteristics, calculating information of the satellite ink dots, showing detailed information reflecting the operation rule of a printing head, and obtaining individual information and operation rule information of the satellite ink dots of a normal document and a suspicious document.
A print data module: and printing the satellite ink dot form, the satellite ink dot distance value and the satellite ink dot appearance direction of the input sample file and the comparison processing result by using output equipment.
The process of the tool management unit applying the satellite ink dots marked by the scale is as follows: setting a two-dimensional coordinate, and marking the typesetting distribution of the rows and the columns of the document to obtain the typesetting distribution map of the document.
The process of amplifying the satellite ink dots by the aid of the amplification tool by the aid of the tool management unit is as follows: and aiming at the satellite ink dots of the normal document and the suspicious document, amplifying and displaying the dot forms of the satellite ink dots, the distance values of the satellite ink dots and the characteristics of the satellite ink dots in the direction in which the satellite ink dots appear, and judging whether contradictory information exists between the satellite ink dots and the operation rule of the printing head.
As shown in fig. 5, the satellite ink dot patterns include three types:
(1) dot type: the satellite ink dots present small dots or small ovals.
(2) Injection type: the satellite ink dots present small lines in the shape of jets.
(3) Cloud type: the satellite ink dots are different from the first 2 shapes and are connected into a piece at the tail end, and the shape of the satellite ink dots is similar to a cloud.
The directions in which the satellite ink dots appear include three:
(1) appear to the left of the stroke edge: representing the print head traveling to the left along the print track.
(2) Appear to the right of the stroke edge: representing the print head traveling to the right along the print track.
(3) Appear to the left and right of the stroke edge: the printing head cannot be printed once when printing the line of writing, and the printing head is finished only by running to the left and right once.
The process of the system login module for identity authentication is as follows: verifying whether the account number and the password are null or not, and otherwise, quitting; checking whether the verification code is input correctly or not, and otherwise, logging out; verifying whether the account number or the password is correct, and if not, quitting; if both are correct, the page jumps to the management page.
As shown in fig. 3, the present invention further provides a method for identifying a satellite ink dot-based inkjet printing additive altered document, comprising:
and authenticating the user to be logged in.
PC segment login and two-dimension code technology remote login, inputting an account name, a password and a verification code on a page, judging whether the account name, the password and the verification code are matched, and returning to a login interface again if the account name, the password and the verification code are not matched; and automatically generating a two-dimensional code on a login interface, sending an authorized user, and realizing login by scanning a mobile phone.
And performing category management and query. After the identity authentication is successful, acquiring the operation authority of adding, deleting, changing and backing up the database; after satellite ink dot information of a normal sample is acquired from a database, recording satellite ink dots of a sample file, wherein the satellite ink dots comprise forms, distances and appearance directions; providing sorting and data printing functions.
The method comprises the steps of carrying out satellite ink dot numerical value character serial connection on satellite ink dots of an input sample file, extracting numerical values of single satellite ink dots in the satellite ink dots of the sample file, comparing and displaying the extracted single satellite ink dot numerical values with satellite ink dot numerical values of all brands of ink-jet printers in a database, comparing forms (shapes, sizes and the like) contained in an outline diagram of the satellite ink dots, satellite ink dot distances, directions of the satellite ink dots and the like, calculating all numerical values, and displaying information such as brands, models, sources and the like of the ink-jet printers related to the satellite ink dots.
Marking satellite ink dots of an input sample file, marking and comparing by using a scale tool, judging whether the satellite ink dots are in normal typesetting distribution, if the satellite ink dots can be matched, feeding back matching information, entering a microscopic amplification tool, marking and counting the observed form of the satellite ink dots, the distance of the satellite ink dots and the direction characteristics of the satellite ink dots, calculating the brand model number value of the ink-jet printer represented by the satellite ink dot characteristics, calculating the information that the satellite ink dot information presents detailed information reflecting the operation rule of a printing head, and obtaining the individual information and the operation rule information of the satellite ink dots of a normal document and a suspicious document. The individual information refers to the form, distance and direction of the satellite ink dots; the operation rule refers to the brand and model of the ink-jet printer, the printing mode of the ink-jet printer during printing, the font and the font size selected by the document, and the like.
The typesetting judgment can be carried out along with the marking of each line of characters in each line of the file by a ruler tool in the software to form a coordinate grid, and if the obvious line spacing and character spacing difference exists, if a line of characters is obviously not in a line of grid lines and is possibly higher or lower than the grid lines, the normal typesetting can be judged. And judging whether the deformation condition exists or not according to the normal typesetting rule obtained by the ruler and whether the direction reflected by the satellite ink dots of the character strokes is consistent with the printing operation rule of the ink-jet printer or not. The specific judgment basis is that the judgment is carried out according to the snaking motion track of the ink-jet printing head, the printing head has a certain height, namely the height of a nozzle, the height and the character row form a corresponding relation, the height and the running direction of the printing head are deduced on a printed document through satellite ink dot direction conversion, and if the changed character row or character is added, the situation that the running of the original ink-jet printing head is inconsistent is probably caused, and obvious differences appear on the snaking motion track, the satellite ink dot direction or form and other details.
And printing the satellite ink dot form, the satellite ink dot distance and the satellite ink dot appearance direction of the input sample file and comparison processing results by using output equipment.
The satellite ink dot-based ink-jet printing additive altered file identification system and method provided by the invention have the advantages that:
(1) the invention utilizes the different satellite ink dot information in the ink jet printing files of different brands and models, determines the information of the satellite ink dot form, the satellite ink dot distance, the graph and the like by marking the satellite ink dot characteristic, and compares the satellite ink dot characteristic value with the satellite ink dot characteristic value in the database to obtain the information of the brand and the individual model of the ink jet printer to which the satellite ink dot characteristic belongs. Respectively comparing satellite ink dot characteristic marks in the ink-jet printing files of different brands and models with satellite ink dot characteristic values in a database, and determining if all the satellite ink dot characteristic marks accord with the satellite ink dot characteristic query, otherwise, not matching; the satellite ink dot characteristics are identified and confirmed, and the brand type of the ink-jet printer can be identified by tracing the satellite ink dots.
(2) The invention extracts the direction characteristic information of the satellite ink dots of different brands and types of ink-jet printing files, marks the direction of the satellite ink dots, marks the snake-shaped motion of the printing head, and utilizes the regular marks between the direction of the satellite ink dots and the snake-shaped motion of the printing head to obtain the information whether the normal document and the suspicious document belong to one-time printing.
(3) The invention utilizes the morphological characteristics, the appearing directional characteristics and other factors of the known satellite ink dot characteristics stored and backed up in the picture. The additive deformation inspection and identification method has the advantages of low inspection cost, good comparison effect, wide application range and high accuracy.
(4) The method comprises the steps of establishing a user form and a field thereof in a picture. Sql databases may only be used by system administrators or users that have already built up the system of the present invention. The embodiment of the invention has higher use permission, prevents other people from freely using or copying the software under the condition of no license, and has higher safety. Meanwhile, by using the two-dimension code authentication technology, the login system can be authorized through other terminals, the application range is expanded, and the utilization rate is high.
The invention also provides two specific modes aiming at typesetting layout detection and operation rule detection.
The first specific mode is as follows:
as shown in FIG. 4, the layout of an ink jet printed document is detected using the method of the present invention.
(1) Firstly, putting a document evidence of a file to be detected into a scanner, scanning the document evidence with a resolution of over 600DPI, inputting the scanned document evidence into a computer, and storing the document evidence as a JPEG format document to obtain a to-be-detected altered file; and meanwhile, carrying out microscopic amplification on the normal document and the suspicious file by using a microscope at a multiplying power of not less than 10X, and storing the normal document and the suspicious file as a JPEG format file.
(2) And secondly, selecting an arbitrary angle of a 'rotating canvas' column in a Photoshop image processing software toolbar to rotationally correct the ink-jet printing file so that the content of the file is horizontal along the transverse direction of the file and vertical along the longitudinal direction of the file. The check is carried out by any one of the following methods (a), (b) and (c) to obtain the typesetting grid map of the ink-jet printing document, and the position identification is carried out at the abnormal position of the typesetting layout.
(a) The Photoshop software image processing function can be utilized to select a new reference line in a 'view' column in a toolbar to obtain horizontal and vertical reference lines, arrange the horizontal reference lines along the horizontal direction of a document, and also arrange the vertical reference lines along the vertical direction of the document to obtain a grid coordinate graph of the document in the horizontal and vertical directions.
(b) Selecting a 'straight line tool' in a toolbar by utilizing a Photoshop software image processing function, then selecting a 'thickness' and a 'color', adjusting the size and the color of a proper pixel, and drawing horizontal lines in sequence along the horizontal direction of a document in a file; similarly, vertical lines are drawn in the file in sequence along the vertical direction of the document. These horizontal lines and vertical lines are arranged to intersect with each other to form a grid-like coordinate diagram.
(c) And printing the ink-jet printing file, and drawing a connecting line along the horizontal and vertical directions of the document by using a ruler and a color pen to form a network-shaped coordinate graph in a cross state.
Fig. 6 is a first to-be-detected document, fig. 9 is a first to-be-detected document with a layout identifier, and it can be known by comparing the first to-be-detected document with the layout identifier that the first to-be-detected document has layout abnormality, where an arrow in the figure indicates a position where the layout abnormality occurs.
Fig. 7 is a second document to be inspected, fig. 10 is a second document to be inspected with a layout identifier, and it can be known by comparing the second document to be inspected with the layout identifier that the second document to be inspected has layout abnormality, wherein an arrow in the figure indicates a position where the layout abnormality occurs.
Fig. 8 is a third document to be inspected, fig. 11 is a third document to be inspected with a layout identifier, and it can be known by comparing the third document to be inspected with the layout identifier that the third document to be inspected has layout abnormality, wherein an arrow in the figure indicates a position where the layout abnormality occurs.
The second specific mode is as follows:
the invention is used for detecting the satellite ink dots of the ink-jet printed file.
(1) Displaying satellite ink dots of a file to be detected by using an optical inspection method or a scanning method, processing the satellite ink dots by using Adobe photoshop image software to obtain a clear image, and storing the clear image in a JPEG format to obtain the file to be detected. When the optical inspection method is used, the microscopic magnification is not less than 10X times.
(2) The form, the distance and the direction of the satellite ink dots of the obtained microscopic magnifications of the normal document and the suspicious document are detected and judged respectively, the satellite ink dots are marked in the direction of the satellite ink dots, and the rule of the satellite ink dots of the ink-jet printing document can be obtained.
(3) According to the rule of satellite ink dot running of the ink jet printing file, the direction of the satellite ink dot is combined, the 'snake-shaped' track of the ink jet printer printing head running along the guide rail in the normal document and the suspicious file is marked respectively, and the abnormal area of the direction of the satellite ink dot and the 'snake-shaped' track of the printing head running along the guide rail is found; clicking the 'inquiry' column, popping up a line and column input dialog box, and inputting the satellite ink dots of the file to be detected into the dialog box to obtain a comparison result.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. For the system disclosed by the embodiment, the description is relatively simple because the system corresponds to the method disclosed by the embodiment, and the relevant points can be referred to the method part for description.
The principles and embodiments of the present invention have been described herein using specific examples, which are provided only to help understand the method and the core concept of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (10)
1. A satellite ink dot based ink jet printing additive altered document authentication system, comprising:
the system comprises a data management module, a database and a data processing module; the data processing module comprises a query unit and a tool management unit;
the data management module is respectively connected with the query unit and the tool management unit; the data management module is used for acquiring a sample file and extracting satellite ink dot information of the sample file;
the database is respectively connected with the data management module, the query unit and the tool management unit; the database is used for storing satellite ink dot information of a normal file; the normal file is a file without added alteration;
the query unit is used for comparing the satellite ink dot information of the sample file extracted by the data management module with the satellite ink dot information of the normal file stored in the database to obtain the ink jet printer information related to the satellite ink dot information of the sample file;
the query unit is also connected with the tool management unit; the tool management unit is used for judging whether a modified file is added to the sample file according to the satellite ink dot information of the sample file extracted by the data management module and the ink jet printer information obtained by the query unit.
2. The satellite ink dot based ink jet printing additive metamorphic document identification system as claimed in claim 1, wherein the tool management unit includes a layout judgment subunit and a rule of operation judgment subunit;
the typesetting judgment subunit is used for judging whether the sample file is typeset normally according to the satellite ink dot information of the sample file; the satellite ink dot information comprises a satellite ink dot direction, a satellite ink dot size and a satellite ink dot distance value;
the operation rule judging subunit is used for calculating printer operation rule information according to the satellite ink dot information of the sample file when the sample file is normally typeset, and judging whether a modified file is added to the sample file or not according to the printer operation rule information and the ink jet printer information related to the satellite ink dot information of the sample file;
the operation rule judging subunit is further configured to output the sample file addition altered file when the sample file is not typeset normally.
3. The satellite ink dot based ink jet printing additive distortion document authentication system of claim 1, further comprising:
a system login module;
the system login module is used for performing identity verification and logging in the inkjet printing and additive alteration file identification system based on the satellite ink dots after the identity verification is successful.
4. The satellite ink dot based ink jet printing additive distortion document authentication system of claim 1, further comprising:
a print data module;
the printing data module is respectively connected with the query unit and the tool management unit; the printing data module is used for outputting a judgment result of whether the sample file is added with the altered file and the information of the ink jet printer related to the satellite ink dot information of the sample file; the inkjet printer information includes: the satellite ink dot characteristic graph of the ink-jet printer, the Chinese name of the ink-jet printer, the Chinese brand name of the ink-jet printer, the English brand name of the ink-jet printer and the model of the ink-jet printer.
5. The satellite ink dot based ink jet printing additive metamorphic document authentication system of claim 1 wherein the query unit includes a preprocessing subunit, a first comparison subunit, a second comparison subunit, a third comparison subunit, and an integration subunit;
the preprocessing subunit is used for preprocessing the satellite ink dot information of the sample file, and identifying the satellite ink dot direction, the satellite ink dot size and the satellite ink dot distance value of the satellite ink dot information of the sample file;
the first comparison subunit is used for comparing the satellite ink dot direction in the satellite ink dot information of the sample file with the satellite ink dot direction in the satellite ink dot information of the normal file in the database to obtain a first comparison result;
the second comparison subunit is used for comparing the satellite ink dot size in the satellite ink dot information of the sample file with the satellite ink dot size in the satellite ink dot information of the normal file in the database to obtain a second comparison result;
the third comparison subunit is configured to compare the satellite ink dot distance value in the satellite ink dot information of the sample file with the satellite ink dot distance value in the satellite ink dot information of the normal file in the database, so as to obtain a third comparison result;
and the integration subunit is used for integrating the first comparison result, the second comparison result and the third comparison result to obtain the information of the ink jet printer related to the satellite ink dot information of the sample file.
6. A method for identifying a satellite ink dot-based ink-jet printing additive altered file is characterized by comprising the following steps:
acquiring satellite ink dot information of a sample file;
comparing the satellite ink dot information of the sample file with the satellite ink dot information of the normal file stored in a database to obtain the ink jet printer information related to the satellite ink dot information of the sample file;
and judging whether the sample file is added with a modified file or not according to the satellite ink dot information of the sample file and the ink jet printer information related to the satellite ink dot information of the sample file.
7. The satellite ink dot based ink jet printing additive metamorphic document authentication method of claim 6, further comprising:
and acquiring the identity information of the user to be logged in, and verifying the identity information of the user to be logged in.
8. The method for identifying a satellite ink dot based ink jet printing additive variation file according to claim 6, wherein the judging whether the sample file adds the variation file according to the satellite ink dot information of the sample file and the ink jet printer information associated with the satellite ink dot information of the sample file specifically comprises:
judging whether the sample file is normally typeset according to the satellite ink dot information of the sample file to obtain a first judgment result;
if the first judgment result shows that the sample file is normally typeset, calculating printer operation rule information according to the satellite ink dot information of the sample file, and judging whether a modified file is added to the sample file or not according to the printer operation rule information and the ink jet printer information related to the satellite ink dot information of the sample file;
and if the first judgment result shows that the sample file is not typeset normally, indicating that the sample file is added with a changed file.
9. The method for identifying a satellite ink dot based ink jet printing additive modification file according to claim 8, wherein the calculating of printer operation rule information according to the satellite ink dot information of the sample file and the determining of whether the sample file is additive modification file according to the printer operation rule information and the ink jet printer information associated with the satellite ink dot information of the sample file specifically comprise:
calculating printer operation rule information according to the satellite ink dot direction in the satellite ink dot information of the sample file;
and judging whether the printer operation rule information is matched with the ink jet printer information related to the satellite ink dot information of the sample file to obtain a second judgment result, and if the second judgment shows that the printer operation rule information is not matched with the ink jet printer information related to the satellite ink dot information of the sample file, adding a modified file.
10. The method for identifying a satellite ink dot based ink jet printing additive metamorphic file according to claim 6, wherein the comparing the satellite ink dot information of the sample file with the satellite ink dot information of the normal file stored in the database to obtain the ink jet printer information associated with the satellite ink dot information of the sample file, specifically comprises:
preprocessing the satellite ink dot information of the sample file, and identifying the satellite ink dot direction, the satellite ink dot size and the satellite ink dot distance value of the satellite ink dot information of the sample file;
comparing the satellite ink dot direction in the satellite ink dot information of the sample file with the satellite ink dot direction in the satellite ink dot information of the normal file in the database to obtain a first comparison result;
comparing the satellite ink dot size in the satellite ink dot information of the sample file with the satellite ink dot size in the satellite ink dot information of the normal file in the database to obtain a second comparison result;
comparing the satellite ink dot distance value in the satellite ink dot information of the sample file with the satellite ink dot distance value in the satellite ink dot information of the normal file in the database to obtain a third comparison result;
and integrating the first comparison result, the second comparison result and the third comparison result to obtain the ink jet printer information related to the satellite ink dot information of the sample file.
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