JPH06337929A - Method and device for managing drawing - Google Patents

Abstract

PURPOSE:To easily and highly accurately execute the input and correction of drawing data by executing conversion from raster information mixed in drawing elements into vector information and correction by pattern processing. CONSTITUTION:Raster data in a drawing read out by a drawing reader are displayed on a screen 62, and while referring to a processing definition table 23, the processing contents of optimum conversion and correction and the processing pattern of order are set up in accordance with the differences or combinations of respective drawing elements. A drawing management control part 113 successively starts a vector graphic processing part 114. a character/ mark recognition processing part 115 and a graphic correction processing part 116 in accordance with the processing pattern to convert graphics into vector data and convert a character/mark into a code. When the drawing consists of plural drawing sorts, the drawing is divided into respective areas on the screen and the processing pattern of each area is set up.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drawing management method and apparatus for electronically managing various design drawings such as maps, facility drawings such as piping systems, mechanical drawings, architectural drawings, printed circuit board mounting drawings, etc. The present invention relates to drawing management for converting image-input raster graphic information into vector graphic information.

[0002]

2. Description of the Related Art In recent years, electronic maps of paper maps and various design drawings have become popular. Methods for digitizing drawing information include vectorization for storing the coordinates of a figure and rasterization for storing drawing information as a set of points.

When a drawing is managed by vector information, since the information is described as line segment coordinates and related information can be attached, vectorized data can be directly applied to calculation processing, and data correction can be performed from a mouse or tablet. It is possible by inputting data, and is suitable for drawing management with frequent corrections. However, the initial input of data is troublesome, and if there is a large amount of drawing information, the burden on the operator is heavy.

On the other hand, in the case of managing the drawing by the raster information, the paper initial drawing can be taken in from the image data reading device to easily obtain the digitized initial input. However, in rasterized data, the pixel is set to the density value or 2
It is represented by a value (1, 0) and is not suitable for uses other than display and printing. Moreover, even if the correction can be easily done on the paper drawing, the direct correction by the raster information is troublesome and lacks accuracy.

Under these circumstances, recently, a processing technique for converting raster information read from a paper drawing into vector information has been developed. Examples of such a method include "Image Processing (p.1146-1150)" and "Character Input (p.1)" published by Information Processing Handbook (1989, published by Ohmsha).
151-1155) ”. Here, a vectorization technique for obtaining a digital line image or a label image from a gray-scale surface image or a binary surface line image and describing a line segment and an area is outlined.

Further, the rasterized data includes paper shrinkage, dimensional deviation due to an angle at the time of reading, poor reproducibility of fine and dense portions, and noise due to dirt and wrinkles.
These correction methods are described, for example, in "GMM drawing input device".
Development of ADG-1010 "(Hitachi review; Vol. 73,
No. 10 (1991); p. 51-56) ".

[0007]

When line information of raster information is recognized and converted into vector information, there are many erroneous recognitions and erroneous conversions when reading from a paper drawing as described above. Correction work to improve the quality of figures becomes indispensable.

Conventionally, an operator alternately displays the converted vector graphic information drawing and data for removal of unnecessary information and correction processing according to a graphic element, such as proximity line coupling and straightening for a straight line. I was going while.

In this case, in a drawing in which drawing elements are mixed,
It is necessary to improve the reproducibility of the converted figure by interactively repeating the necessary correction processing for each figure element on a single drawing many times. There is.

An object of the present invention is to convert raster graphic information in which a plurality of drawing elements are mixed into vector graphic information,
An object is to provide a drawing management method for pattern processing.

An object of the present invention is to convert raster graphic information taken in from a new or modified paper drawing through a drawing reading device into vector graphic information easily and with high quality, thereby facilitating maintenance of drawings. The object is to provide a drawing management device that does.

[0012]

DISCLOSURE OF THE INVENTION The present invention includes a character, a symbol, and
In the drawing management method, the drawing element is identified from the raster figure information in which a plurality of drawing elements such as a straight line, a curved line, or a surface figure (closed figure) are mixed, and the vector figure information is created by vectorization or encoding. For each area of raster graphic information divided by the ratio and combination of
It is characterized in that a processing pattern indicating the contents and order of the conversion processing and correction processing for creating vector graphic information is defined in advance and the processing is performed according to the processing pattern.

[0013]

According to the present invention, the area of the raster graphic information is divided by a difference or combination of drawing elements such as a "table" mainly composed of ruled lines and a "route" mainly composed of symbols and straight lines. The processing contents and order are defined for each area. As a result, subsequent conversion processing and correction processing are automatically performed.

According to the present invention, the difference and ratio of drawing elements,
Alternatively, for each combination, drawing classifications such as “table”, “route”, and “map” and processing patterns suitable for them are defined in advance based on the experience of the skilled person and past results, so the area on the screen When the drawing classification is designated, a processing pattern corresponding to each area is executed to create corrected vector graphic information. As a result, the burden on the operator in area division and process definition is reduced, and the quality of vector graphic information can be improved.

As described above, according to the present invention, even in the case of a drawing in which elements are mixed, the optimum processing can be patterned according to the difference or ratio of the elements, and the conversion processing can be automated. Further, since the raster information read from the paper drawing can be easily converted into vector information, it is possible to provide a drawing management device which facilitates maintenance such as creation and correction of digitized drawings.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 2 is a basic configuration diagram of a drawing management apparatus to which the present invention is applied. The drawing management device is a central processing unit (CP
U) 1, file device 2, drawing output device (printer)
3, mouse 4, main memory 5, display device (C
RT) 6, a keyboard 7, etc., and a drawing reading device 8 is attached.

In the figure, the file device 2 stores drawing data. Drawing data includes raster data that stores all characters, lines, surface figures, etc. as point information, vector data that stores lines and area figures as coordinate information, and coded (font) data that stores characters and symbols in code. There is. The vector data and the coded data are provided with attribute data representing the related information corresponding to the figure or code by characters or numerical values.

The display screen of the CRT 6 comprises an icon area 61 for function selection and a drawing display area 62 as shown in FIG. To display the drawing data on the CRT 6, use the mouse 4
Is operated and is designated by the cursor CU.

For the CPU 1, "drawing reading" is designated,
When the data type (raster data or vector data), drawing name, drawing number number, etc. are input from the keyboard 7, the corresponding drawing data is retrieved from the file device 2 and temporarily stored in the main memory 5, and this drawing data is stored. C
Edit and display according to the display area (coordinates) of RT6.

The main memory 5 stores the program and data being processed in order for the CPU 1 to perform processing such as retrieval and editing of screen data.

The CPU 1 is also provided with a well-known graphic display function such as enlarging or reducing the display screen at an arbitrary magnification, scrolling when looking outside the display area, and rotating the screen by designating a function selection icon. However, the operator can see the target drawing contents in detail by the screen display by these functions.

The drawing data stored in the file device 2 or the main memory 5 is printed on paper or polyester film by the printer 3.

Next, the raster data for reading and storing a paper drawing and the conversion processing from raster data to vector data or characters / symbols will be described with reference to FIGS. 1 and 3.
Will be described. FIG. 1 is a functional block diagram of a drawing management apparatus according to this embodiment, which is realized by a CPU 1 and its software. FIG. 3 is a flowchart showing an outline of the processing of the drawing management device.

To start the operation of the drawing management apparatus starting from reading the drawing, the "drawing input" icon is selected.
This selection command is input to the drawing management control unit 113 via the operation input unit 111, and the drawing reading device 8 is operated by the “drawing input” command from the drawing management control unit 113 to the drawing input unit 112.

In step s101, the drawing reading device 8 scans a paper (paper or film) drawing at a predetermined speed, and creates a color / shade gradation according to the shading or color of each point,
It digitizes and generates drawing information by raster data.

In step s102, the drawing management controller 1
13 inputs the raster drawing information and temporarily stores it in the main memory 5, and the drawing management display processing unit 117 edits and displays it in accordance with the drawing display area 62, and adds a predetermined search key to the raster information to create a file. It is stored in the raster information area 20 of the device 2. For the search key, the drawing number, for example, "pipe diagram", "construction plan", "water supply ledger",
Assign drawing names such as "architectural drawing" and "machine drawing".

At step s103, the desired raster graphic information is read by the search key and displayed on the screen. On this screen, the operator divides the processing area with the mouse,
Set the drawing classification for each area. The coordinates of the processing area and the drawing classification are stored in the main memory 5. As will be described later, the raster graphic information is divided and stored for each divided area.

The processing area and drawing classification may be set in step s102 and stored in the raster information area 23 together with the search key. According to this, when converting a plurality of drawings, it is possible to perform continuous processing only by designating the drawings that need to be converted.

The drawing classification is preliminarily classified by names such as "straight line", "character", "table", "route", "map" according to the difference or ratio or combination of the graphic elements. Then, the processing contents and order of “vector conversion”, “character / symbol coding (also called character / symbol recognition)” and “graphic correction” suitable for each classification are stored in the processing definition table 23 of the file device 2. It is stored. The drawing classification and process definition can be arbitrarily set by the operator in each case.

At step s104, first, the icon of "automatic conversion correction" is selected. As a result, the drawing management control unit 113 refers to the processing definition corresponding to the set drawing classification for each processing area of the drawing.

In step s105, the control unit 113 follows the process definition referred to and the vector conversion processing unit 11
4 processing (s106), character / symbol recognition processing section 115 processing (s107), and figure correction processing section 116 processing (s1).
08) is operated to encode and vectorize the raster graphic of the area to correct it. Then, when all the processing areas are finished (s109), the automatic conversion processing is finished.

The vector data that has been converted and corrected has its constituent coordinate points described in two-dimensional coordinates (X _i , Y _i ) and stored in the vector data area 22 of the file device 2. The coded data converted from the characters / symbols is stored in the coded data area 21 together with the coordinate point information. It should be noted that the encoded data is provided with region coordinates for each character row (column) so that the encoded data can be combined with the original drawing.

FIG. 4 is a flow chart showing an example of the conversion processing of the vector graphic processing section 114. First, an image of raster data is input from the memory 215 (s2
01). When this data form is a gray-scale surface (lump) image, the discontinuity is extracted by the boundary degree calculation by the differential method or the like (s202). As a result, a gray-scale line image is obtained.

Next, ridge point detection (s203) is performed to obtain a digital line image of width 1. Alternatively, the gray-scale linear image is binarized into a binary linear image (s204), and is thinned within the range where connectivity is not lost (s205) to obtain a digital linear image. Raster data is gray line image or 2
In the case of the data form of the value line image, the process before s204 is unnecessary.

The digital line image is Hough.
A line segment is described by conversion (s206) or line tracing (s207).

In the Hough transform, when the coordinates of each point on the digital line are (X ₁ , Y ₁ ), the parameters of all straight lines passing through these points (for example, the length and direction of the perpendicular line from the origin) are set to 2 Dimension a histogram and estimate a straight line from the peak.

The line tracing is represented by a starting point coordinate on a digital line and a sequence of unit steps in the following eight directions (chain code).

The individual vector data described by the line segment is
By the area description processing (s208), the line segments of a predetermined graphic area are combined and edited to be a database.

FIG. 5 is a flowchart showing the processing of the character / symbol recognition processing unit 115. First, when an image of raster data is input from the memory 215 (s301),
The background is separated from the distribution of the density histogram, the four sides of the character, which is a two-dimensional plane figure, are extracted, and preprocessing is performed to align the size and position (s302).

Next, the feature extraction of the character pattern is performed by the horizontal feature that cuts the character pattern into strips, or the outermost point list method by the uneven portion of the outer shape of the character pattern (s303).
The character pattern classified by the feature is identified as a specific character by the pattern matching method (s304) or the structure analysis method (s305), and is encoded into a code of a fixed font (font) (s306). Finally, the origin coordinates of the character (symbol) are used as the two-dimensional coordinate information, and a database is created together with the code (s307).

In the pattern matching method, the input pattern and the standard pattern of each character type in the identification dictionary are superposed,
Recognize the character type that gives the maximum match as the character of the input pattern. The feature analysis method determines, for example, whether the above-mentioned horizontal feature sequence from the top to the bottom matches the identification transition table created for each character type (recognition automan).

In the figure correction processing unit 116, a proximity line joining process for making the constituent points of figures close to each other within a specific distance into one figure, a straightening process for erasing constituent points having a specific width of a polygonal line or more, It has functions such as corner correction for correcting the corners of a vector closed figure to a constant angle, and erasure of a minute figure of a minute vector figure below a specific value. Each specific value is set as a parameter for processing.

FIG. 6 is an example of a screen in which the drawing name “water supply ledger” is searched and displayed from the raster data area 20 of the file device 2. In the “water supply ledger”, table information (ruled lines / character information) in which the user's address, name, construction history, etc. are entered, piping information indicating the piping system of the user's house, and map information indicating roads and house frames near the user's house It consists of

The table information includes area A [(x ₁ , y ₁ ),
(X ₂ , y ₂ )], and is composed of straight lines (ruled lines) and graphic elements of characters. The pipe information is the area B [(x ₃ , y ₃ ),
(X ₄ , y ₄ )], and consists of straight line and symbolic graphic elements. The piping information is a kind of route information that is the same as a plant system diagram, an electrical network, a road network, a railway network, or the like. The map information includes area C [(x ₅ , y ₅ ), (x ₆ ,
y ₆ )] and is formed mainly of graphic elements such as straight lines, curved lines, and surface graphics.

FIG. 7 shows the process definition table 200 for the drawing classification of each area of the "water supply ledger". To create the process definition table 200, first, the diagonal coordinates of the areas A, B, and C divided by the difference or combination of drawing elements are set. Next, the processing contents of each area are defined in the processing order.

FIG. 8 is a conceptual diagram for explaining the area division of the raster graphic data of the "water supply ledger" before the conversion processing based on the area designation. The input raster data stored in the storage area 20 includes the entire area. The data of area A, area B, and area C is divided from this data and stored. Further, the data of the area D is created by performing the difference processing between the entire area data and the data of the areas A, B, and C. The data of the area D includes the entire outer frame and boundary information between the areas, and the processing content and order according to the graphic element is also defined for this area.

As described above, since the target raster graphic is divided into regions in advance and the conversion and correction processes are performed for each region, unnecessary duplication process is eliminated and the speed can be increased.

In the above example, the drawing classification of each area is not always necessary. However, when the drawing classification is divided by the combination or ratio of the drawing elements and the processing contents and order suitable for each drawing classification are defined in advance, the processing contents and order of each area specify the drawing classification. Can only be defined by

FIG. 9 shows such a processing principle definition table. In the process definition table 201, optimal process contents and order are defined in advance for each generalized drawing classification. Therefore, when the operator sets the processing area and its drawing classification, a table equivalent to that in FIG. 8 can be immediately generated.

In the present embodiment, the drawing classification and processing pattern arbitrarily created by the operator are also registered and can be reused. The "table" and "route" in FIG. 9 are initially created arbitrarily. If the drawing classification is subdivided according to the parameters of the correction process, the selection range can be widened according to the situation of the figure and the purpose of use.

After setting the processing area and creating the processing definition table, the drawing management control unit 113 starts the conversion processing from the area A. First, the character / symbol recognition processing unit 115 is operated to perform character recognition in the area A, each character is encoded and coordinates are given, and the character string (row) is managed and stored in the storage area 21.

Next, the vector conversion processing unit 114 is operated to trace the raster information of the area A, and the broken points of each line segment are described by coordinates and vectorized. After that, the graphic correction processing unit 116 is operated to correct the vectorized data,
It is stored in the storage area 22.

In the vector data of the area A, the drawing classification is "table", the ruled lines forming the table are relatively long straight lines with few constituent points, the start and end points of the line segment are connected by straight lines, and Is connected with the line segment of. In this embodiment, the characteristics of this table information are adapted and corrected.

FIG. 10 shows an example of processing for correcting the vectorized table data in the area A. FIG. 10A shows the processing pattern of this embodiment. FIG. 11B shows the result of the proximity line combination after the straight line correction, regardless of the processing pattern of this embodiment.

Since there are no broken straight lines in the table information, vectorized figures (H01, H04) before correction
The line segments, which are originally part of one straight line, which are divided (301 to 304) by (1), are closely coupled (H02).
Further, since the table information is an artificial figure, the original drawing has no noise. Therefore, since all the minute figures remaining after the correction of the proximity coupling can be regarded as noise, they are deleted. Since all of the start points and end points of the line segments after the close coupling should be straight lines, the number of constituent points of one figure (line segment) is reduced, and the bent portion is linearly corrected (H03).

On the other hand, if straight line correction is first performed as shown in FIG. 7B, each of the divided short lines is made straight (H0
5). After that, if combining processing is performed to form one figure (H0
6), parts (305, 306) that cannot be linearized are generated. In addition, even if the minute figure is erased before the proximity line coupling, the useful short broken line is also erased, so that the closed table figure cannot be reproduced.

As described above, in the table information, it is effective to improve the accuracy of reproducibility by first performing the proximity line coupling and then performing the straight line correction or the minute figure erasure.

In the vector data of the area B, the drawing classification is "route" and the route information is an artificial figure,
Since the line segment is divided by the bent portion or the symbol of the route, the short line figure and the long line figure are mixed. Therefore, the route information needs a correction processing procedure that leaves a short line figure. Further, the route information may be used for various network analysis, even in the case of the pipeline figure of this example, and the line figure is not divided by other than the symbol (even if it is not divided by the symbol. Yes).

FIG. 11 shows an example of processing for correcting the vectorized route data of the area B. FIG. 11A shows the processing pattern of this embodiment, and FIG. 11B shows the processing of this embodiment. This is the case not depending on the pattern.

First, the character / symbol recognition processing unit 115 is operated to encode the symbols (a) and (b) which are easily misidentified as a graphic, and then the vector graphic processing is performed (K01).

Since there are many short lines in the route information (pipe line information in this example), first, as shown in FIG. 10A, the bent portions (402, 405) having a width less than a certain width are linearized by linear correction. Lines and bends that need to be left (403, 40
4,408,410) becomes apparent (K02). Then, the divided parts (401, 405, 407, 409) of the line segments are closely coupled, and are coupled with another figure so as to make sense as route information (K03). This joint becomes a new bent portion. The minute figure remaining after the proximity coupling is regarded as noise and is erased.

On the other hand, as shown in FIG. 6B, when the proximity line coupling is processed first, for example, 406 and 407 are coupled to form a bent portion having a certain width or less (K05), and then linearization processing is performed. Then, the bent portions 406 and 407 are removed. As a result, the number of bent portions existing in FIG. 11 (a) is reduced to four in FIG. 11 (b), and the bent shape of the conduit is omitted, so that reproducibility is significantly reduced. .

As described above, in the route information, it is effective to first perform straight line correction and then perform proximity line coupling.

Next, the conversion processing of the map information of the C area is performed. Since the graphic in the area C in FIG. 7 does not include characters or symbols, the vector graphic processing and the graphic correction processing are directly performed. Originally, the map information is a figure based on a free curve of a natural object, and is formed mainly by straight lines with many bends, which are a collection of short line segments, curves, and closed figures.

Therefore, when there are many short and small straight lines, each line segment is linearized by straight line correction, and then the broken portions of the line segments are joined by proximity coupling. After that, the corner correction is performed to make the house frame or the intersection of the road into a right angle, and finally the minute figure is erased. If there are many curves, straight line correction is not performed and proximity coupling is started.

According to the present embodiment, even in the case of graphic information in which a plurality of graphic elements are mixed, the operator can automatically perform the conversion and correction from the raster graphic to the vector graphic only by setting the processing definition table. Therefore, if the paper drawing is input by the reading device 8, the vector data can be easily realized, and the maintenance of the drawing including the correction becomes extremely easy.

[0068]

According to the drawing management method of the present invention, conversion from raster graphic information in which a plurality of drawing elements are mixed into vector graphic information can be patterned according to the ratio and combination of drawing elements. This has the effect of saving labor and improving the accuracy of converted data.

According to the drawing management apparatus of the present invention, raster graphic information read from a paper drawing can be easily converted into vector graphic information and corrected, so that vector drawing information can be easily created and maintained, and highly functional. Drawing management becomes possible.

[Brief description of drawings]

FIG. 1 is a functional block diagram of a drawing management apparatus that is an embodiment of the present invention.

FIG. 2 is a hardware configuration diagram of a drawing management apparatus as an application example of the present invention.

FIG. 3 is a flowchart showing a drawing management method according to an embodiment of the present invention.

FIG. 4 is a flowchart showing a conversion process from raster to vector data.

FIG. 5 is a flowchart showing a conversion process from raster characters to encoded data.

FIG. 6 is a screen display example of a “water supply ledger” drawing showing its area divisions.

FIG. 7 is a process definition table of each area of the “water supply ledger” drawing.

FIG. 8 is a conceptual diagram illustrating divided storage of raster data for each area.

FIG. 9 is a processing definition table defined by drawing classification.

FIG. 10 is an example of a screen display for each processing step in correcting “table” information, where (a) is according to the processing procedure of the present embodiment, and (b) is not.

FIG. 11 is an example of a screen display for each processing step in correcting the “route” information, where (a) is according to the processing procedure of the present embodiment, and (b) is not.

[Explanation of symbols]

1 ... Central processing unit (CPU) 2 ... File device, 3 ... Drawing output device, 4 ... Mouse, 5 ... Main memory, 6 ... Display, 7 ... Keyboard, 8 ... Drawing reading device, 20 ...
Raster data storage area, 21 ... Character / symbol data storage area, 22 ... Vector data storage area, 23 ... Processing definition table storage area, 61 ... Operation icon area, 62
... drawing display area 111 ... operation input unit 112 ... drawing input unit 113 ... drawing management control unit 114 ... vector graphic processing unit 115 ... graphic recognition processing unit 116 ... graphic correction processing unit 117 ... drawing management Display processing unit, 200, 201
... Process definition table.

Claims (10)

[Claims] 1. A drawing management method for converting raster graphic information in which a plurality of drawing elements are mixed into vector graphic information, wherein conversion processing and correction processing for creating the vector graphic information according to a ratio or combination of the drawing elements. The drawing management method characterized in that the contents and the order of are defined in advance and the raster graphic information is automatically converted into vector graphic information according to the definition. 2. A drawing management method for converting raster graphic information in which a plurality of drawing elements coexist into vector graphic information, wherein the raster graphic information is divided into one or more regions according to a ratio or combination of the drawing elements, and A drawing management method characterized in that the contents and order of the conversion process and the correction process are defined for each area, and the raster graphic information of each area is converted into vector graphic information according to the definition. 3. The method according to claim 1 or 2, wherein when the raster graphic information is a "table" mainly composed of straight lines (eg ruled lines), the correction processing is first performed by proximity line combination and then straight line correction and / or A drawing management method characterized by erasing minute figures. 4. The correction process according to claim 1 or 2, when the raster graphic information is a "route" mainly composed of a symbol and a straight line, after the conversion process of encoding the symbol and vectorizing the straight line. A drawing management method characterized by first performing straight line correction and then performing proximity line coupling. 5. The processing pattern according to claim 1, wherein a content and order of the conversion processing and the correction processing are ruled in advance for each drawing classification divided by a ratio or combination of the drawing elements. The drawing management method is characterized in that by specifying the drawing classification corresponding to the raster graphic information, the contents and order of the conversion processing and correction processing are defined from the corresponding processing pattern. 6. A drawing element is identified from raster graphic information in which a plurality of drawing elements such as characters, symbols, straight lines, curves, surface figures (closed figures) coexist, and conversion of vectorization and coding,
In a drawing management method for performing correction processing to create vector graphic information, a processing pattern in which the contents and order of the conversion processing and correction processing are ruled in advance is provided for each drawing classification divided by the difference or combination of the drawing elements. Storing, dividing the raster graphic information into a plurality of areas by the difference or combination of the drawing elements, specifying the drawing classification corresponding to each area, according to the processing pattern corresponding to the specified drawing classification, A drawing management method comprising performing the conversion processing and the correction processing. 7. The table according to claim 6, wherein the drawing classification includes a character and a ruled line.
There is a "path" that combines a symbol and a straight line, and the processing pattern of the "table" defines encoding of characters and vectorization of ruled lines, then proximity line coupling, and then straight line correction. A drawing management method characterized in that a processing pattern is defined by encoding a symbol, vectorizing a straight line, then correcting a straight line, and then defining proximity line coupling. 8. The drawing management according to claim 6 or 7, wherein the raster graphic information read from the paper drawing is designated with the drawing name (for example, number), the coordinates of the area and the drawing classification. Method. 9. A drawing element is identified from raster graphic information in which a plurality of drawing elements such as characters, symbols, straight lines, curves, surface figures (closed figures) are mixed, and conversion processing and correction processing for vectorization and coding are performed. In a drawing management device for performing vector graphic information by performing the above, an input means for taking in the raster graphic information from the drawing reading device, and a drawing display for editing and displaying the input raster graphic information and the converted vector graphic information on the screen Means, and the raster graphic information representing the entire area of the drawing in grayscale values or binary values on a pixel-by-pixel basis, and the vector graphic information that represents the line segments of the drawing by coordinates and / or the characters and symbols of the drawing. For each area divided from the raster graphic information due to the difference or combination of the drawing elements and each of the coded information represented by the code and the coordinates. A storage unit that stores split raster graphic information, a processing definition table that stores in advance a processing pattern in which the contents and order of the conversion processing and correction processing are ruled for each area, and a screen that displays the raster graphic information. In addition to designating the coordinates for each of the regions above, the region designating unit that defines the processing pattern of each region, the recognition processing unit that performs the encoding, the vectorization processing unit that performs the vectorization, and the vector information are corrected. A drawing data management device comprising: a correction processing unit, and a graphic conversion processing means for processing the divided raster graphic information according to a corresponding processing pattern of the processing definition table. 10. The "table" according to claim 9, which is classified by a difference or combination of the drawing elements,
A plurality of drawing classifications such as “route” and processing patterns corresponding to each drawing classification are stored in advance in the processing definition table,
A drawing management apparatus capable of automatically defining a processing pattern of each area by designating a drawing classification from the area specifying means.