CN108399156B - The composition method and device of formula in a kind of pdf document - Google Patents
The composition method and device of formula in a kind of pdf document Download PDFInfo
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- CN108399156B CN108399156B CN201810168769.2A CN201810168769A CN108399156B CN 108399156 B CN108399156 B CN 108399156B CN 201810168769 A CN201810168769 A CN 201810168769A CN 108399156 B CN108399156 B CN 108399156B
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Abstract
The present invention provides the composition methods and device of formula in a kind of pdf document, wherein this method comprises: obtaining the Latex format formula for including in XML file；Jlatex function library is called to determine the size of Latex format formula；Create PDF vectogram identical with the size of Latex format formula；Call Jlatex function library that the drafting information for corresponding to Latex format formula is plotted on the PDF vectogram of creation；The PDF vectogram of drafting is inserted at location information corresponding with Latex format formula by the location information based on Latex format formula in pdf document, to obtain the pdf document after typesetting.The present invention realizes the direct creation of PDF vectogram by the calling of Jlatex function library, easy to operate, further such that the typesetting efficiency of pdf document is higher, and there is no the picture distortion phenomenon under being enlarged, the using experience degree of user is preferable.
Description
Technical field
The present invention relates to typesetting system fields, in particular to the composition method and dress of formula in a kind of pdf document
It sets.
Background technique
LATEX is a kind of composing system based on TEX, using this format, even if user does not have typesetting and programming
Knowledge can also give full play to the power as provided by TEX.Especially for the complicated table of generation and mathematical formulae, table
Now it is especially prominent.Therefore, it is generated in pdf document according to XML file typesetting, for formula part, usually in XML file
Retain the XML tag of a representation formula, content is then LATEX format.Wherein, LATEX content is that user is compiled using text
Collect device direct editing.
When generating pdf document according to XML file typesetting in the related technology, all LATEX are extracted from XML file first
Then the formula content of format calls LATEX interface that all formula contents are generated formula PDF, finally by each formula PDF points
It is not inserted into the corresponding position of entire pdf document.
However, PDF composition method formula content corresponding for each LATEX format in the related technology is required to mention
It takes, parse and exported with formula, it is complicated for operation, and when the corresponding formula content of LATEX format is more, it considerably increases resource and accounts for
Dosage causes the efficiency of typesetting lower.
Summary of the invention
In view of this, the purpose of the present invention is to provide the composition method and device of formula in a kind of pdf document, to improve
The efficiency of typesetting.
In a first aspect, the present invention provides a kind of composition methods of formula in pdf document, comprising:
Obtain the Latex format formula for including in XML file；
Jlatex function library is called to determine the size of the Latex format formula；
Create PDF vectogram identical with the size of the Latex format formula；
Call the Jlatex function library that the drafting information for corresponding to the Latex format formula is plotted in the institute of creation
It states on PDF vectogram；
The PDF vectogram of drafting is inserted by the location information based on the Latex format formula in pdf document
At to location information corresponding with the Latex format formula, to obtain the pdf document after typesetting.
With reference to first aspect, the present invention provides the first possible embodiments of first aspect, wherein the calling
Jlatex function library determines the size of the Latex format formula, comprising:
The size of the Latex format formula is determined according to the formula analysis function in the Jlatex function library.
With reference to first aspect, the present invention provides second of possible embodiments of first aspect, wherein the calling
The drafting information for corresponding to the Latex format formula is plotted in the PDF vectogram of creation by the Jlatex function library
On, comprising:
A JAVA object comprising PDF vectogram is generated, the JAVA object is used to simulate the Graphics2D class of JAVA；
The drafting formula interface for calling the JLatex function library, transmits the JAVA object；
The drafting information for receiving the Latex format formula calls the drawing image function in the Graphics2D class,
The drafting information is converted into PDF and draws instruction, to be plotted on the PDF vectogram.
The possible embodiment of second with reference to first aspect, the third the present invention provides first aspect are possible
Embodiment, wherein the drafting information includes content information and the location information corresponding to content information, the content letter
Breath includes: text information, font information and symbolic information.
The third possible embodiment with reference to first aspect, the 4th kind the present invention provides first aspect are possible
Embodiment, wherein described that the drafting information is converted into PDF drafting instruction, comprising:
The font information is converted into the font information of PDF format；
The font information of the text information and the PDF format is converted into PDF and draws instruction.
With reference to first aspect, the present invention provides the 5th kind of possible embodiments of first aspect, wherein incites somebody to action described
Before the PDF vectogram drawn is inserted at location information corresponding with the Latex format formula, further includes:
Formula label is drawn in the PDF vectogram of drafting.
Second aspect, the present invention also provides a kind of composing devices of formula in pdf document, comprising:
Formula obtains module, for obtaining the Latex format formula for including in XML file；
Size determining module, for calling Jlatex function library to determine the size of the Latex format formula；
Vectogram creation module, for creating PDF vectogram identical with the size of the Latex format formula；
Vectogram drafting module, for calling the Jlatex function library that will correspond to drawing for the Latex format formula
Information processed is plotted on the PDF vectogram of creation；
File type-setting module, for the location information based on the Latex format formula in pdf document, by drafting
The PDF vectogram is inserted at location information corresponding with the Latex format formula, to obtain the pdf document after typesetting.
In conjunction with second aspect, the present invention provides the first possible embodiments of second aspect, wherein the size
Determining module, specifically for determining the Latex format formula according to the formula analysis function in the Jlatex function library
Size.
In conjunction with second aspect, the present invention provides second of possible embodiments of second aspect, wherein the vector
Figure drafting module, is specifically used for, and generates a JAVA object comprising PDF vectogram, the JAVA object is for simulating JAVA's
Graphics2D class；The drafting formula interface for calling the JLatex function library, transmits the JAVA object；Described in reception
The drafting information of Latex format formula calls the drawing image function in the Graphics2D class, and the drafting information is turned
It is changed to PDF and draws instruction, to be plotted on the PDF vectogram.
In conjunction with second of possible embodiment of second aspect, the third the present invention provides second aspect is possible
Embodiment, wherein the drafting information includes content information and the location information corresponding to content information, the content letter
Breath includes: text information and symbolic information.
The composition method and device of formula in pdf document provided by the invention, first acquisition XML file in include
Latex format formula；Then it calls Jlatex function library to determine the size of Latex format formula, and creates public with Latex format
The identical PDF vectogram of the size of formula；Furthermore Jlatex function library is called to draw the drafting information for corresponding to Latex format formula
System is on the PDF vectogram of creation；The finally location information based on Latex format formula in pdf document, by the PDF of drafting
Vectogram is inserted at location information corresponding with Latex format formula, to obtain the pdf document after typesetting, that is, it passes through
The calling of Jlatex function library realizes the direct creation of PDF vectogram, easy to operate, further such that the typesetting of pdf document is imitated
Rate is higher, and there is no the picture distortion phenomenon under being enlarged, the using experience degree of user is preferable.
To enable the above objects, features and advantages of the present invention to be clearer and more comprehensible, preferred embodiment is cited below particularly, and cooperate
Appended attached drawing, is described in detail below.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 shows the flow chart of the composition method of formula in a kind of pdf document provided by the embodiment of the present invention；
Fig. 2 shows the flow charts of the composition method of formula in another kind pdf document provided by the embodiment of the present invention；
Fig. 3 shows the flow chart of the composition method of formula in another kind pdf document provided by the embodiment of the present invention；
Fig. 4 shows the structural schematic diagram of the composing device of formula in a kind of pdf document provided by the embodiment of the present invention.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
Middle attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is only
It is a part of the embodiment of the present invention, instead of all the embodiments.The present invention being usually described and illustrated herein in the accompanying drawings is real
The component for applying example can be arranged and be designed with a variety of different configurations.Therefore, of the invention to what is provided in the accompanying drawings below
The detailed description of embodiment is not intended to limit the range of claimed invention, but is merely representative of selected reality of the invention
Apply example.Based on the embodiment of the present invention, those skilled in the art institute obtained without making creative work
There are other embodiments, shall fall within the protection scope of the present invention.
In the composing system for generating pdf document in view of XML file, for the typesetting of mathematical formulae, there are typesetting efficiency
Low, system resource occupies excessively high problem.Based on this, the embodiment of the invention provides a kind of typesetting sides of formula in pdf document
Method calls Jlatex function library to carry out mathematical formulae typesetting, and auxiliary XML file generates pdf document, and typesetting efficiency is higher.
The flow chart of the composition method of formula, above-mentioned in pdf document provided in an embodiment of the present invention shown in Figure 1
The executing subject of the composition method of formula is computer equipment in pdf document, and this method specifically comprises the following steps:
S101, the Latex format formula for including in XML file is obtained.
Here, it is contemplated that the concrete application scene of the composition method of formula in pdf document provided in an embodiment of the present invention, this
Inventive embodiments need to obtain the Latex format formula for including in XML file, in XML file, remain a representation formula
XML tag, the content of label is entirely Latex format.Specifically, the embodiment of the present invention can be by using text editor
The Latex code in XML file is obtained, the Latex Code obtaining of the mathematical formulae of desired acquisition.
S102, calling Jlatex function library determine the size of Latex format formula.
Here, for the Latex code of the mathematical formulae of above-mentioned acquisition, the embodiment of the present invention is by calling Jlatex function
Library determines the size for the mathematical formulae that Latex code is stated.Wherein, the size of the mathematical formulae includes but unlimited
Width value, height value in mathematical formulae.
S103, creation PDF vectogram identical with the size of Latex format formula.
Here, the size for the mathematical formulae that the embodiment of the present invention is got based on Jlatex function library, creation with
The identical PDF vectogram of size of Latex code statement, the height of the vectogram of PDF is the height of formula, PDF vectogram
Width be formula width.
S104, call Jlatex function library by the drafting information for corresponding to Latex format formula be plotted in the PDF of creation to
On spirogram.
Here, the embodiment of the present invention carries out the drafting of mathematical formulae based on the PDF vectogram of initialized size, first
First, the Graphics2D class based on JAVA generates the JAVA object comprising PDF vectogram, then calls Jlatex function library
In drafting formula procedure, be passed to generated JAVA object information, instruction will be drawn and be converted into the identical PDF of display effect and refer to
It enables, and is drawn on PDF vectogram.
S105, the location information based on Latex format formula in pdf document, by the PDF vectogram of drafting be inserted into
At the corresponding location information of Latex format formula, to obtain the pdf document after typesetting.
Here, location information of the embodiment of the present invention based on Latex format formula in XML file will have been completed to draw
Mathematical formulae and label information be inserted into corresponding position in pdf document, with obtain complete typesetting after pdf document.
The composition method of formula in pdf document provided in an embodiment of the present invention, first acquisition XML file in include
Latex format formula；Then it calls Jlatex function library to determine the size of Latex format formula, and creates public with Latex format
The identical PDF vectogram of the size of formula；Furthermore Jlatex function library is called to draw the drafting information for corresponding to Latex format formula
System is on the PDF vectogram of creation；The finally location information based on Latex format formula in pdf document, by the PDF of drafting
Vectogram is inserted at location information corresponding with Latex format formula, to obtain the pdf document after typesetting, that is, it passes through
The calling of Jlatex function library realizes the direct creation of PDF vectogram, easy to operate, further such that the typesetting of pdf document is imitated
Rate is higher, and there is no the picture distortion phenomenon under being enlarged, the using experience degree of user is preferable.
For the ease of the Latex format formula in XML file to be output in pdf document, the embodiment of the present invention needs to adjust
The size of Latex format formula is determined with the formula analysis function in Jlatex function library.The embodiment of the present invention can be based on PDF
The default page width of file and default page height determine the size of Latex format formula, that is, various sizes of PDF is literary
The size of the corresponding Latex format formula of part is also different.Specifically, the embodiment of the present invention can first call formula analysis function,
Then the default page width of pdf document and default page height are input to the formula analysis function, pass through formula analysis letter
Several analyses can directly acquire the size of Latex format formula.
The composition method of formula also needs to call Jlatex function library that will correspond in pdf document provided in an embodiment of the present invention
In on the PDF vectogram that the drafting information of Latex format formula is plotted in creation, referring to fig. 2, the drafting of above-mentioned PDF vectogram
Process specifically comprises the following steps:
S201, a JAVA object comprising PDF vectogram is generated, JAVA object is used to simulate the Graphics2D of JAVA
Class；
S202, the drafting formula interface for calling JLatex function library transmit JAVA object；
S203, the drafting information for receiving Latex format formula call the drawing image function in Graphics2D class, will
It draws information and is converted to PDF drafting instruction, to be plotted on PDF vectogram.
Here, the embodiment of the present invention firstly generates the JAVA object comprising PDF vectogram, then passes through calling
The drafting formula interface of JLatex function library, transmits the JAVA object of above-mentioned generation, then calls JAVA object simulation
The drafting information of received Latex format formula is converted to PDF and draws instruction by the drawing image function in Graphics2D class
And it is plotted on PDF vectogram.
Wherein, above-mentioned Graphics2D class is a general class, and the powerful X-Y scheme processing capacity that JAVA 2D possesses is i.e.
It is to be completed by the Graphics2D class, such is a subclass of Graphics class.Its feature is the figure drawn
Shape is handled as an object, first creates object before drawing.In addition, above-mentioned drafting information includes content information and corresponds to
The location information of content information, content information include: text information and symbolic information.
In the embodiment of the present invention, after by formula analysis typesetting, Yao Zhenzheng draws formula, will call and above-mentioned passes to JAVA
Corresponding each corresponding drawing image function, and be transmitted to drawing image function point, text, symbol etc. and draw information and is corresponding
Picture point, draw text, the draftings instruction such as Taoism draw magic figures or incantations number.Above-mentioned drawing image function does not have actually after receiving above-mentioned drafting instruction
There is picture on the screen, also do not have to be drawn as bitmap as usually, but drafting instruction is converted into the identical PDF of display effect and is drawn
System instruction is drawn on the PDF vectogram based on JAVA object creation.
It is interior involved in formula in the embodiment of the present invention in order to further ensure display effect of the formula in pdf document
Hold text information, font information and the symbolic information for including in information and carries out corresponding processing.
For text information, referring to Fig. 3, the composition method of formula is logical in pdf document provided in an embodiment of the present invention
It crosses following steps and realizes that drafting information draws the conversion of instruction to PDF:
S301, the font information that font information is converted into PDF format；
S302, the font information of text information and PDF format is converted into PDF drafting instruction.
Here, the PDF that the text information of PDF format is converted is drawn into instruction and is plotted in the PDF based on JAVA object creation
On vectogram, the display effect for the text information for including in formula is further ensured.
For symbolic information, in the embodiment of the present invention, remain unchanged it afterwards before switching, to further ensure
The display effect for the symbolic information for including in formula.
In addition, for the above-mentioned mathematical formulae for completing to draw in PDF vectogram, can also add in the embodiment of the present invention
Add formula label, and the PDF vectogram added with formula label is inserted into location information corresponding with Latex format formula
Place.Wherein, above-mentioned formula label can be the number information of mathematical formulae in pdf document.
The composition method of formula in pdf document provided in an embodiment of the present invention, first acquisition XML file in include
Latex format formula；Then it calls Jlatex function library to determine the size of Latex format formula, and creates public with Latex format
The identical PDF vectogram of the size of formula；Furthermore Jlatex function library is called to draw the drafting information for corresponding to Latex format formula
System is on the PDF vectogram of creation；The finally location information based on Latex format formula in pdf document, by the PDF of drafting
Vectogram is inserted at location information corresponding with Latex format formula, to obtain the pdf document after typesetting, that is, it passes through
The calling of Jlatex function library realizes the direct creation of PDF vectogram, easy to operate, further such that the typesetting of pdf document is imitated
Rate is higher, and there is no the formula distortion phenomenon under being enlarged, the using experience degree of user is preferable.
Based on the same inventive concept, it is additionally provided in the embodiment of the present invention corresponding with the composition method of formula in pdf document
Pdf document in formula composing device, the principle solved the problems, such as due to the device in the embodiment of the present invention and the present invention are implemented
The composition method of formula is similar in the above-mentioned pdf document of example, therefore the implementation of device may refer to the implementation of method, repeats place not
It repeats again.As shown in figure 4, for the structural schematic diagram of the composing device of formula in pdf document provided by the embodiment of the present invention, it should
The composing device of formula includes: in pdf document
Formula obtains module 11, for obtaining the Latex format formula for including in XML file；
Size determining module 22 is specifically used for root for calling Jlatex function library to determine the size of Latex format formula
The size of Latex format formula is determined according to the formula analysis function in Jlatex function library；
Vectogram creation module 33, for creating PDF vectogram identical with the size of Latex format formula；
Vectogram drafting module 44, for calling Jlatex function library that will correspond to the drafting information of Latex format formula
It is plotted on the PDF vectogram of creation,
File type-setting module 55, for the location information based on Latex format formula in pdf document, by the PDF of drafting
Vectogram is inserted at location information corresponding with Latex format formula, to obtain the pdf document after typesetting.
In specific implementation, above-mentioned size determining module 22, specifically for according to the formula analysis in Jlatex function library
Function determines the size of Latex format formula.
In specific implementation, above-mentioned vectogram drafting module 44, specifically for generating JAVA pairs comprising PDF vectogram
As JAVA object is used to simulate the Graphics2D class of JAVA；The drafting formula interface of JLatex function library is called, JAVA is transmitted
Object；The drafting information of Latex format formula is received, the drawing image function in Graphics2D class is called, information will be drawn
It is converted to PDF and draws instruction, to be plotted on PDF vectogram.
Wherein, above-mentioned drafting information includes content information and the location information corresponding to content information, content information packet
It includes: text information and symbolic information.
In specific implementation, above-mentioned vectogram drafting module 44, is converted into PDF format also particularly useful for by text information
Text information；The text information of PDF format is converted into PDF and draws instruction.
The composing device of formula in above-mentioned pdf document further include:
Label drafting module 66, for drawing formula label in the PDF vectogram of drafting.
The composing device of formula in pdf document provided in an embodiment of the present invention, first acquisition XML file in include
Latex format formula；Then it calls Jlatex function library to determine the size of Latex format formula, and creates public with Latex format
The identical PDF vectogram of the size of formula；Furthermore Jlatex function library is called to draw the drafting information for corresponding to Latex format formula
System is on the PDF vectogram of creation；The finally location information based on Latex format formula in pdf document, by the PDF of drafting
Vectogram is inserted at location information corresponding with Latex format formula, to obtain the pdf document after typesetting, that is, it passes through
The calling of Jlatex function library realizes the direct creation of PDF vectogram, easy to operate, further such that the typesetting of pdf document is imitated
Rate is higher, and there is no the formula distortion phenomenon under being enlarged, the using experience degree of user is preferable.
The computer program product of the method for the typesetting of pdf document, including storage are carried out provided by the embodiment of the present invention
The computer readable storage medium of program code, the instruction that said program code includes can be used for executing previous methods embodiment
Described in method, specific implementation can be found in embodiment of the method, details are not described herein.
The device of the typesetting of pdf document provided by the embodiment of the present invention can be the specific hardware or installation in equipment
In software or firmware etc. in equipment.The technical effect of device provided by the embodiment of the present invention, realization principle and generation and
Preceding method embodiment is identical, and to briefly describe, Installation practice part does not refer to place, can refer in preceding method embodiment
Corresponding contents.It is apparent to those skilled in the art that for convenience and simplicity of description, foregoing description is
The specific work process of system, device and unit, the corresponding process during reference can be made to the above method embodiment, it is no longer superfluous herein
It states.
In embodiment provided by the present invention, it should be understood that disclosed device and method, it can be by others side
Formula is realized.The apparatus embodiments described above are merely exemplary, for example, the division of the unit, only one kind are patrolled
Function division is collected, there may be another division manner in actual implementation, in another example, multiple units or components can combine or can
To be integrated into another system, or some features can be ignored or not executed.Another point, shown or discussed is mutual
Coupling, direct-coupling or communication connection can be INDIRECT COUPLING or communication link by some communication interfaces, device or unit
It connects, can be electrical property, mechanical or other forms.
The unit as illustrated by the separation member may or may not be physically separated, aobvious as unit
The component shown may or may not be physical unit, it can and it is in one place, or may be distributed over multiple
In network unit.It can select some or all of unit therein according to the actual needs to realize the mesh of this embodiment scheme
's.
In addition, each functional unit in embodiment provided by the invention can integrate in one processing unit, it can also
To be that each unit physically exists alone, can also be integrated in one unit with two or more units.
It, can be with if the function is realized in the form of SFU software functional unit and when sold or used as an independent product
It is stored in a computer readable storage medium.Based on this understanding, technical solution of the present invention is substantially in other words
The part of the part that contributes to existing technology or the technical solution can be embodied in the form of software products, the meter
Calculation machine software product is stored in a storage medium, including some instructions are used so that a computer equipment (can be a
People's computer, server or network equipment etc.) it performs all or part of the steps of the method described in the various embodiments of the present invention.
And storage medium above-mentioned includes: that USB flash disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), arbitrary access are deposited
The various media that can store program code such as reservoir (RAM, Random Access Memory), magnetic or disk.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing, in addition, term " the
One ", " second ", " third " etc. are only used for distinguishing description, are not understood to indicate or imply relative importance.
Finally, it should be noted that embodiment described above, only a specific embodiment of the invention, to illustrate the present invention
Technical solution, rather than its limitations, scope of protection of the present invention is not limited thereto, although with reference to the foregoing embodiments to this hair
It is bright to be described in detail, those skilled in the art should understand that: anyone skilled in the art
In the technical scope disclosed by the present invention, it can still modify to technical solution documented by previous embodiment or can be light
It is readily conceivable that variation or equivalent replacement of some of the technical features；And these modifications, variation or replacement, do not make
The essence of corresponding technical solution is detached from the spirit and scope of technical solution of the embodiment of the present invention.Should all it cover in protection of the invention
Within the scope of.Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. the composition method of formula in a kind of pdf document characterized by comprising
Obtain the Latex format formula for including in XML file；
Jlatex function library is called to determine the size of the Latex format formula；
Create PDF vectogram identical with the size of the Latex format formula；
Call the Jlatex function library that the drafting information for corresponding to the Latex format formula is plotted in described in creation
On PDF vectogram；
Location information based on the Latex format formula in pdf document, by the PDF vectogram of drafting be inserted into
At the corresponding location information of the Latex format formula, to obtain the pdf document after typesetting.
2. the method according to claim 1, wherein the calling Jlatex function library determines the Latex lattice
The size of formula formula, comprising:
The size of the Latex format formula is determined according to the formula analysis function in the Jlatex function library.
3. the method according to claim 1, wherein described call the Jlatex function library will be corresponding to described
The drafting information of Latex format formula is plotted on the PDF vectogram of creation, comprising:
A JAVA object comprising PDF vectogram is generated, the JAVA object is used to simulate the Graphics2D class of JAVA；
The drafting formula interface for calling the JLatex function library, transmits the JAVA object；
The drafting information for receiving the Latex format formula calls the drawing image function in the Graphics2D class, by institute
It states drafting information and is converted to PDF drafting instruction, to be plotted on the PDF vectogram.
4. according to the method described in claim 3, it is characterized in that, the drafting information includes content information and corresponds to interior
Hold the location information of information, the content information includes: text information, font information and symbolic information.
5. according to the method described in claim 4, it is characterized in that, it is described by the drafting information be converted to PDF draw instruction,
Include:
The font information is converted into the font information of PDF format；
The font information of the text information and the PDF format is converted into PDF and draws instruction.
6. the method according to claim 1, wherein it is described by the PDF vectogram of drafting be inserted into
Before at the corresponding location information of the Latex format formula, further includes:
Formula label is drawn in the PDF vectogram of drafting.
7. the composing device of formula in a kind of pdf document characterized by comprising
Formula obtains module, for obtaining the Latex format formula for including in XML file；
Size determining module, for calling Jlatex function library to determine the size of the Latex format formula；
Vectogram creation module, for creating PDF vectogram identical with the size of the Latex format formula；
Vectogram drafting module, for calling the Jlatex function library to believe the drafting for corresponding to the Latex format formula
Breath is plotted on the PDF vectogram of creation；
File type-setting module will be described in drafting for the location information based on the Latex format formula in pdf document
PDF vectogram is inserted at location information corresponding with the Latex format formula, to obtain the pdf document after typesetting.
8. device according to claim 7, which is characterized in that the size determining module is specifically used for according to
Formula analysis function in Jlatex function library determines the size of the Latex format formula.
9. device according to claim 7, which is characterized in that the vectogram drafting module is specifically used for, and generates a packet
The JAVA object of the vectogram containing PDF, the JAVA object are used to simulate the Graphics2D class of JAVA；Call the JLatex letter
The drafting formula interface in number library, transmits the JAVA object；The drafting information of the Latex format formula is received, described in calling
The drafting information is converted to PDF and draws instruction, to be plotted in the PDF by the drawing image function in Graphics2D class
On vectogram.
10. device according to claim 9, which is characterized in that the drafting information includes content information and corresponds to
The location information of content information, the content information include: text information and symbolic information.
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| CN111507067A (en) * | 2019-01-31 | 2020-08-07 | 北京易真学思教育科技有限公司 | Method for obtaining formula pictures, method and device for transferring formula pictures |
| CN110059628A (en) * | 2019-04-18 | 2019-07-26 | 广东小天才科技有限公司 | Image recognition method, device, equipment and storage medium |
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| CN101329731A (en) * | 2008-06-06 | 2008-12-24 | 南开大学 | Automatic Recognition Method of Mathematical Formula in Image |
| CN101714133A (en) * | 2009-11-18 | 2010-05-26 | 佛山市数苑科技信息有限公司 | WEB-based mathematical formula editing system and method |
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| CN105868177A (en) * | 2016-03-24 | 2016-08-17 | 河北师范大学 | Universal formula search method |
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