CN106250129A - The vector quantization dynamic drawing method of symbol based on meta graph recognition model - Google Patents
The vector quantization dynamic drawing method of symbol based on meta graph recognition model Download PDFInfo
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Abstract
The invention discloses the vector quantization dynamic drawing method of symbol based on meta graph recognition model, belong to the technical field that data process.Present invention XML draws vector symbol and achieves the separation described file with draw platform, the vector identification corresponding to element figure model is obtained by resolving symbol XML file, the dynamic adjustment of vector identification is achieved in conjunction with math label, and then achieve the dynamic plotting of symbol, improve drafting accuracy, save a large amount of study specialty and draw the time of vector icon software, provide great convenience for the vector symbol extension in later stage, cross-platform transplanting.
Description
Technical field
The invention discloses the vector quantization dynamic drawing method of symbol based on meta graph recognition model, belong to the skill of digital processing
Art field.
Background technology
Realization for motion vector symbol at present has two kinds of methods: 1. utilize its secondary on existing basis of software
Development language and the graphics edition function of self realize, such as the MapBasic language of Mapinfo company and Arclnf08.01
Inter-symbol design system StyleManage in ArcMap module；2. the function provided for concrete software designs, draws
Symbol, such as the MapX assembly of Maplnfo company.Although above method is respectively arranged with feature, but uses more complicated, need developer
Take a significant amount of time and be familiar with software using method, and the vector symbol that this kind of drawing software is drawn is to its platform dependence very
By force, need the most drawn vector symbol to be carried out little amendment, such as: the change of angle, the change etc. of width, the most quite
In drawing a new symbol the most again.Simultaneously as the difference of each software, the dynamic symbol constructed lacks versatility, nothing
The cross-platform transplanting of method.Vector plotting file can not efficiently separate with vector plotting loading code, and coupling is high between the two.Unfavorable
In finishing operations such as amendments again, add the workload of developer.
Summary of the invention
The goal of the invention of the present invention is the deficiency for above-mentioned background technology, it is provided that vector based on meta graph recognition model
Change the dynamic drawing method of symbol, combine XML file and math label to obtain moving corresponding to element figure model
State vector identifies, it is achieved that the dynamic plotting of symbol, solves XML document high with structure Coupling degree, and the later stage is difficult to accord with vector
Number extension, cross-platform transplants difficult technical problem.
The present invention adopts the following technical scheme that for achieving the above object
The vector quantization dynamic drawing method of symbol based on meta graph recognition model, comprises the steps:
A, set up element figure model library；
B, descriptor XML file, described symbol generate XML file include: the root node of descriptor application scenarios with
And it being respectively described main control point set, the child node of subordinate control point set, the child node of described description main control point set is subordinated to root
Node, describe subordinate control point set child node be subordinated to describe main control point set child node, wherein,
Root node is including but not limited to figure metaset information, and figure metaset comprises each element figure for combination producing symbol,
Describe main control point set child node including but not limited to: Master Node positional information and description are used for calculating master
The math label of control point positional information computing, main control point set is the set of the point determining each primitive shapes,
Describe subordinate control the child node of point set including but not limited to: subordinate control point positional information and description by based on
Calculating the math label of subordinate control point positional information computing, it is the point coordinating each main Control point to determine primitive shapes that subordinate controls point set
Set；
C, parsing symbol XML file obtain the vector identification corresponding to element figure model library, extract each vector identification
Master Node positional information, subordinate control point positional information；
D, foundation element figure model library, resolve the vector identification and the Master Node position of extraction obtained according to step C
Confidence breath, subordinate control point positional information mark and draw pel, combine each primitive generating symbol.
Further, in the described vector quantization dynamic drawing method of symbol based on meta graph recognition model, the symbol that step B describes
In number XML file, root node also comprises superset, and superset comprises the combination pixel for combination producing symbol.
Further, in the described vector quantization dynamic drawing method of symbol based on meta graph recognition model, root node, description master
The child node controlling point set, the child node describing subordinate control point set all comprise description self and the rope of other node mutual relation
Fuse ceases.
As the further prioritization scheme of the described vector quantization dynamic drawing method of symbol based on meta graph recognition model, step
Described in rapid C, subordinate control point positional information extracts according to the position relationship of subordinate control point and Master Node.
Further, the described vector quantization dynamic drawing method of symbol based on meta graph recognition model, the base set up in step A
This graphical element model storehouse includes: line chart unit, circle diagram unit, circular arc pel, rectangular element, curve pel, polygon pel.
The present invention uses technique scheme, has the advantages that
(1) the invention provides a kind of method marking and drawing dynamic symbol, draw vector symbol with XML and achieve description literary composition
Part and the separation of drafting platform, obtain the vector identification corresponding to element figure model by resolving symbol XML file, in conjunction with
Math label achieves the dynamic adjustment of vector identification, and then achieves dynamically marking and drawing of symbol, improves drafting accuracy, saves
A large amount of study specialties draw the time of vector icon softwares, extend for the vector symbol in later stage, expand platform transplantation and provide pole
Big convenience.
(2) present invention also offers three-dimensional extended space, for realizing three-dimensional future, spatialization present vector symbol provide
May, can expand to the field such as geological prospecting, building.
Accompanying drawing explanation
Fig. 1 is the meta graph recognition model of motion vector symbol.
Fig. 2 is the schematic diagram dynamically marking and drawing vector quantization symbol.
Fig. 3 is the pincer attack arrow that need to draw.
Fig. 4 is to identify symbol Master Node shown in Fig. 3, the vector symbol at subordinate control point.
Fig. 5 is to resolve the vector identification expressed after XML file.
Fig. 6 is to adjust the vector identification obtained behind control point.
Detailed description of the invention
Below in conjunction with the accompanying drawings the technical scheme of invention is described in detail.Present invention seek to address that XML document and structure
The problem that the degree of coupling is high, proposes a kind of motion vector symbol marking method so that the symbol marked and drawn can be expanded in the later stage
Exhibition cross-platform transplanting.XML itself simply uses element and attribute to describe and do not provide the method for video data, and this makes
Obtaining vector plotting file to efficiently separate with vector plotting loading code, the mathematical operation of math tag definition and XML file are extracted
Information combine the vector identification that can obtain corresponding to element figure model, which greatly simplifies the plotting of vector symbol
Journey, alleviates the workload of developer.
In order to solve problems present in motion vector symbol marking, present description provides a kind of new for dynamic
The drawing method of state vector symbol, and use the parsing XML parsing storehouse of the TinyXML increased income that file is resolved, use letter
Single, easy left-hand seat.The model in this parsing storehouse, by resolving XML file, then generates DOM model in internal memory, thus allows me
Travel through this XML tree very easily.The method makes full use of the powerful self portrait ability of expansible plotting Language XML, opens
Putting property, platform-neutral and flexibility characteristics, a kind of method setting up general motion vector symbol marking, this vector plotting is advised
Model is based on Utf-8 character set, and with reference to XML standard and the Math standard that W3C formulates.
The meta graph recognition model of motion vector symbol is as it is shown in figure 1, by resolving vector quantization denotational description file, read main
Control point, and then calculate subordinate control point, then obtain basis pel from pel template base and combine, it is right to ultimately produce
Answer motion vector symbol.
This vector plotting file stores in xml format, and its file comprises a root node, i.e. scene root node, root
There are 4 child nodes below node, are main control point set, subordinate point set, figure metaset and extension respectively.
(1) detailed structural framing is as follows:
<scene root node>
<master control Dian Ji>...</master control Dian Ji>
<subordinate Dian Ji>...</subordinate Dian Ji>
<figure metaset; ... </figure metaset;
<expansion></expansion>
</scene Gen Jiedian>
(2) detailed description of file label
● master control point set
Bookmark name: CtrlPoints
Father node: Scene
Child node: CtrlPoint
Attribute: nothing
● Master Node
Bookmark name: CtrlPoint
Father node: CtrlPoints
Child node: nothing
Attribute: x-axis relative coordinate, y-axis relative coordinate, z-axis relative coordinate
Value: control point set
● subordinate point set
Bookmark name: DependentPoints
Father node: Scene
Child node: DependentPoint
Attribute: nothing
Value: nothing
● subordinate point
Bookmark name: DependentPoint
Father node: DependentPoints
Child node: CtrlPointIndexs, DependentPointCoord
Attribute: nothing
Value: main Control point index information, subordinate point coordinates information
● main Control point indexed set
Bookmark name: CtrlPointIndexs
Father node: DependentPoint
Child node: CtrlPointIndex
Attribute: nothing
Value: main Control point index information set
● main Control point indexes
Bookmark name: CtrlPointIndex
Father node: CtrlPointIndexs
Child node: nothing
Attribute: index information, comprises the index value of a relevant main Control point
Value: nothing
● subordinate point position
Bookmark name: DependentPointCoord
Father node: DependentPoint
Child node: math
Attribute: nothing
Value: generate the relevant mathematical logic of some position, deposit by the order of x, y, z
● figure metaset
Bookmark name: Primitives
Father node: Scene
Child node: Primitive
Attribute: nothing
Value: the pel set that composition is marked and drawed
● pel
Bookmark name: Primitive
Father node: Primitives
Child node: PointIndex, Interpolation, PrimitiveType
Attribute: name, type, isfilled
Value: the single pel that composition is marked and drawed
● point set
Bookmark name: PointIndex
Father node: Primitive
Child node: CtrlPointIndex, DependentPointIndex
Attribute:
Value: nothing
● interpolation parameter
Bookmark name: Interpolation
Father node: Primitive
Child node: nothing
Attribute: nothing
Value: interpolation parameter value
● pel pattern
Bookmark name: PrimitiveType
Father node: Primitive
Child node: nothing
Attribute: nothing
Value: pel pattern sequence number
● extension
Bookmark name: Extension
Father node: Primitive
Child node: AddedCtrlPoint
Attribute: nothing
Value: newly-increased point set
● the set of newly-increased point
Bookmark name: Extension
Father node: Scene
Child node: AddedCtrlPoint
Attribute: nothing
Value: newly-increased some set
● newly-increased point
Bookmark name: AddedCtrlPoint
Father node: Extension
Child node: math
Attribute: newly-increased some initial coordinate
Value: the mathematical logic of newly-increased point coordinates
(3) math label describes in detail
● addition
Bookmark name: mplus
Child node: comprise multiple mathematical logic label, each label represents addend
● multiplication
Bookmark name: mmult
Child node: comprise multiple mathematical logic label, each label represents multiplier
● division
Bookmark name: mfrac
Child node: comprise two child nodes, represent dividend and divisor respectively
● power
Bookmark name: mpow
Child node: comprise a child node, represent the truth of a matter
Parameter: comprise a parameter, represent index
● constant
Bookmark name: mn
Value a: double-precision floating points
● variable
Bookmark name: mi
Value: one at the most referenced index value
The drafting of motion vector symbol for convenience, defines such as the element figure of table 1, and the composition of element figure shown in table 1 is originally
The element figure model library that invention relates to.
Table 1 element figure definition table
By to above XML file label and the detailed description of math label, mark being carried out standard according to frame structure
Form stores.Step is as follows:
1, set up coordinate axes, determine Master Node and determined subordinate control point expression formula by Master Node；
2, according to structural framing and tag expression vector symbol；
(3) subordinate point related attentional item
Subordinate point is tried to achieve according to two control point.Can be depended in the hope of subordinate point by CtrlPointIndexs
Two control point.Target order under control point as represented by CtrlPointIndexs, we are by the two control point successively table
It is shown as (x1, y1) and (x2, y2).The control point that different subordinate points are relied on is the most different, but number is all 2, so I
Just represent two control point with (x1, y1) and (x2, y2).The control point that the position of subordinate point is depended on it is relevant, calculates
The key problem of subordinate point is i.e. to obtain the relation formula between subordinate point and control point.
Information above is that the definition of the node etc. to dynamic symbol describes, and after completing file description, solves file
Analysis and expression, as shown in Figure 2.
Element figure model library has to point, line, rectangle, circle, camber line, the definition of six kinds of element figures of curve, and complete
The description file of vector symbol in pairs.
Element figure pie graph meta template storehouse in element figure model library, in pel template base, storage defines
Some element figure types, including title and attribute thereof, attribute includes again: labelling, expression condition, explanation.
Shape library by means of the drawing function that QT is powerful complete to point defined in element figure, line, rectangle, circle, camber line,
The drafting of curve.After completing the parsing to graphical element model file, from pel template base, call element figure and at figure
Expression library is drawn and dynamic combined, finally gives expression to vector symbol according to coordinate.
Three. accompanying drawing explanation
The vector symbol that requirement as shown in Figure 3 is drawn, it is desirable to two drift angles of this figure are 30 °.
Establish coordinate axes as shown in Figure 4, from element figure defined above to symbol carry out split, arrow
Two triangle drift angles at quantity symbol top are made up of broken line, and remainder is made up of 4 curves.According to the base needed for each pel
Originally count and determine substantially counting on every curve.Owing to this vector symbol has symmetry, so only need to determine on the right side of x-axis
Coordinate points, the x coordinate being adjusted corresponding point of symmetry can express the coordinate points of opposite side.
First, give the suitable coordinate of Master Node A0 to A8, such as: Master Node A0:(0.0,0.0 as required,
0.0), Master Node A1:(2.0,0.0,0.0).
Secondly, after Master Node coordinate determines, drift angle 30 ° and axial symmetry the coordinate at subordinate control point can be obtained such as
Under:
Subordinate control point B0 depends on Master Node A1, Master Node A2, Master Node A1, Master Node A2 coordinate parameters
It is expressed as (x1, y1, z1)、(x2, y2, z2), therefore, the expression formula of subordinate control point B0 is: (tan15 ° × (y1-y2)+x2,-
tan15°×(x1-x2)+y2, 0).
In like manner, the expression formula of subordinate control point B1 is (-tan15 ° × (y1-y2)+x2, tan15 ° × (x1-x2)+y2, 0).
Again, the coordinate at each subordinate control point is expressed according to the math label defined and expression formula.Only illustrate subordinate
The expression at control point 0.
Subordinate control point 0
Finally, express the various piece of vector symbol with point set, element figure etc., splice.The most only lift in Fig. 4 right
The example that upper drift angle is drawn.
<Primitive name=" pel 0 " type=" Line " isfilled=" 0 ">// pel index value is 0, class
Type is line segment, non-filling
It is linked in sequence each point by the index point of broken line.
Fig. 5 is vector identification corresponding after analyzing platform resolves xml document, and Fig. 6 is through the tune to control point
Vector identification after the adjustment of whole acquisition.User can according to oneself need adjust each control point to obtain oneself required dynamic
Vector identification.
In sum, the method have the advantages that
(1) the invention provides a kind of method marking and drawing dynamic symbol, draw vector symbol with XML and achieve description literary composition
Part and the separation of drafting platform, obtain the vector identification corresponding to element figure model by resolving symbol XML file, in conjunction with
Math label achieves the dynamic adjustment of vector identification, and then achieves dynamically marking and drawing of symbol, improves drafting accuracy, saves
A large amount of study specialties draw the time of vector icon softwares, extend for the vector symbol in later stage, expand platform transplantation and provide pole
Big convenience.
(2) present invention also offers three-dimensional extended space, for realizing three-dimensional future, spatialization present vector symbol provide
May, can expand to the field such as geological prospecting, building.
As seen through the above description of the embodiments, those skilled in the art it can be understood that to the present invention can
The mode adding required general hardware platform by software realizes.Based on such understanding, technical scheme essence
On the part that in other words prior art contributed can embody with the form of software product, this computer software product
Can be stored in storage medium, such as ROM/RAM, magnetic disc, CD etc., including some instructions with so that a computer equipment
(can be personal computer, server, or the network equipment etc.) performs embodiments of the invention or some part of embodiment
Described method.
Claims (5)
1. the vector quantization dynamic drawing method of symbol based on meta graph recognition model, it is characterised in that comprise the steps:
A, set up element figure model library；
B, descriptor XML file, described symbol generates XML file and includes: the root node of descriptor application scenarios and point
Not describing main control point set, the child node of subordinate control point set, the child node of described description main control point set is subordinated to root node,
Describe subordinate control point set child node be subordinated to describe main control point set child node, wherein,
Root node is including but not limited to figure metaset information, and figure metaset comprises each element figure for combination producing symbol,
Describe main control point set child node including but not limited to: Master Node positional information and description are used for calculating main control
The math label of dot position information computing, main control point set is the set of the point determining each primitive shapes,
Describe subordinate control the child node of point set including but not limited to: subordinate control point positional information and describe for calculate from
Belonging to the math label of control point positional information computing, it is the collection that each main Control point of cooperation determines the point of primitive shapes that subordinate controls point set
Close；
C, parsing symbol XML file obtain the vector identification corresponding to element figure model library, extract the master control of each vector identification
Dot position information processed, subordinate control point positional information；
D, foundation element figure model library, resolve the Master Node position letter of vector identification and the extraction obtained according to step C
Breath, subordinate control point positional information mark and draw pel, combine each primitive generating symbol.
The vector quantization dynamic drawing method of symbol based on meta graph recognition model the most according to claim 1, it is characterised in that step
In the symbol XML file that rapid B describes, root node also comprises superset, and superset comprises the constitutional diagram for combination producing symbol
Unit.
The vector quantization dynamic drawing method of symbol based on meta graph recognition model the most according to claim 1, it is characterised in that root
Node, the child node of description main control point set, description subordinate control the child node of point set and all comprise description self and other node
The index information of mutual relation.
4. according to the vector quantization dynamic drawing method of symbol based on meta graph recognition model described in any one in claims 1 to 3,
It is characterized in that, the positional information of subordinate control point described in step C carries according to the position relationship at subordinate control point and Master Node
Take.
The vector quantization dynamic drawing method of symbol based on meta graph recognition model the most according to claim 1, it is characterised in that step
The element figure model library set up in rapid A includes: line chart unit, circle diagram unit, circular arc pel, rectangular element, curve pel, polygon
Pel.
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| CN107145655A (en) * | 2017-04-25 | 2017-09-08 | 南京南瑞集团公司 | The method for setting up the grid equipment vector graphical element sign mould comprising topology information |
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| CN109887058A (en) * | 2018-11-07 | 2019-06-14 | 上海艾麒信息科技有限公司 | Cross-platform drafting system |
| CN111880883A (en) * | 2020-07-29 | 2020-11-03 | 北京中水科水电科技开发有限公司 | Dynamic combined primitive realization method based on equipment object |
| CN112802158A (en) * | 2021-01-18 | 2021-05-14 | 中国人民解放军国防科技大学 | Large-scale dynamic symbol plotting method based on multi-scale visualization |
| CN113553635A (en) * | 2021-06-28 | 2021-10-26 | 通号城市轨道交通技术有限公司 | Method and device for configuring graph base primitive, electronic equipment and storage medium |
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