JP2024068871A - Drawing Management System - Google Patents

Abstract

To provide a drawing management system that digitizes character information written on a page on which a building drawing is drawn.SOLUTION: A drawing management system includes: an extraction unit that extracts written information from image data of an image including a drawing representing a building written on a paper and written information written on the paper; an identification unit that acquires at least text information from the written information in the image data; a data creation unit that creates drawing data by adding the text information of the written information acquired by the identification unit to the image data so that the text information is displayed in the image represented by the image data; and a storage unit that stores the drawing data.SELECTED DRAWING: Figure 1

Description

The present invention relates to a drawing management system that digitizes images including drawings of buildings on paper and written information written on the paper, and stores the image data, and in particular to a drawing management system that converts written information such as characters written on paper on which building drawings are drawn into text that can be processed by a computer.

When designing and completing a building, various drawings such as site plans, layout plans, floor plans, and elevations are created. These drawings may undergo several changes before the building is completed. Furthermore, instructions for changes to the building's design and confirmations regarding the building's design are written directly on the paper on which the drawings are drawn. By the time the building is completed, the number of drawings can become enormous. This makes managing the drawings extremely cumbersome. As a result, a method for managing the drawings has been proposed.

For example, Patent Document 1 proposes a drawing management system that efficiently manages the huge number of drawings created when building a house, and that can easily register the handwritten revisions to drawings that are often made up until completion as drawing data in a database.

JP 2008-21025 A

In Patent Document 1, handwritten revised drawings are read and the data is saved, and any characters written on the drawings are also saved as images. This makes it possible to check what has been written on the drawings, but to use what has been written, it is necessary to convert it into text that can be processed by a computer.

Therefore, the present invention was made in consideration of the above problems, and its purpose is to provide a drawing management system that digitizes text information and other information written on paper on which building drawings are drawn.

The above problem is solved by the drawing management system of the present invention, which has an extraction unit that extracts written information from image data of an image including a drawing representing a building written on paper and written information written on the paper, an identification unit that acquires at least text information from the written information in the image data, a data creation unit that creates drawing data by adding the text information of the written information acquired by the identification unit to the image data so that the text information is displayed in the image represented by the image data, and a storage unit that stores the drawing data.
In the plan management system of the present invention configured as described above, character information and the like written on building plans can be digitized.
It is preferable that the above-mentioned drawing management system further comprises an acquisition unit for acquiring image data of an image including a drawing representing a building drawn on paper and written information written on the paper.
According to the above configuration, image data can be easily acquired.

In the above-mentioned drawing management system, it is preferable that the extraction unit divides the image indicated by the image data into a plurality of areas and extracts the written information for each area.
According to the above configuration, the written information can be easily extracted, and the extraction position can also be easily specified.
In the above-described drawing management system, it is more preferable that the data creation unit adds text information of the written information to the image data so that the text information is displayed at a position in the image data corresponding to the area from which the written information was extracted.
According to the above configuration, the position of the written information corresponds to a position on the drawing data, so that the written information is easy to recognize.
Furthermore, in the above-mentioned drawing management system, it is even more preferable that when the written information written on the paper includes an arrow or an indication line, the data creation unit adds text information based on the written information to the image data so that the text information is displayed at a location set based on the position of the tip of the arrow or indication line.
According to the above configuration, it is possible to clarify the location, etc., indicated by the written information.

Furthermore, in the above-mentioned drawing management system, when the extracting section extracts a plurality of pieces of written information, it is even more preferable that the identifying section classifies each piece of written information.
According to the above configuration, by classifying the written information, the relationship between the written information can be clarified.
In the above-mentioned drawing management system, the classification of the written information by the identification unit is even more preferable if position information of each piece of written information on the paper or the orientation of characters in the written information is used.
According to the above configuration, the written information can be easily classified.
Furthermore, in the above-mentioned drawing management system, it is even more preferable if the data creation unit changes areas of the image represented by the image data other than the areas corresponding to the drawing of the building on paper to blank areas, and then adds text information to the image data so that text information based on the written information is displayed in the blank areas.
According to the above configuration, image data can be easily added to text information.

In the above-mentioned drawing management system, it is even more preferable if the data creation unit adds at least one of user information of the user who wrote the written information and date information on when the written information was written to the image data.
According to the above configuration, the posting date of the posted information and the user who posted it can be easily identified.
It is easy to add drawing data.
In the above-mentioned drawing management system, a comparison unit is provided which compares image data of an image including a drawing of a building written on paper and written information written on the paper with drawing data stored in the storage unit, and when the comparison unit determines that there is drawing data related to the image data among the drawing data stored in the storage unit, it is even more preferable to associate the drawing data obtained from the image data with the related drawing data and store it in the storage unit.
According to the above configuration, the image data acquired by the acquisition unit can be stored in the storage unit in association with the drawing data.

The drawing management system of the present invention can digitize text information written on paper on which building drawings are drawn.

FIG. 1 is a schematic diagram showing an example of a drawing management system according to an embodiment of the present invention; 1A to 1E are schematic diagrams showing an example of management of drawings in the order of steps using a drawing management system according to one embodiment of the present invention. 3A is a schematic diagram showing an example of image data acquired by a drawing management system of one embodiment of the present invention, FIG. 3B is an enlarged view of a main portion of FIG. 3A, and FIG. 3C is an enlarged view of a main portion of FIG. 3A. 1A is a schematic diagram showing a first example of drawing data obtained by a drawing management system of one embodiment of the present invention, and FIG. 1B is a schematic diagram showing a second example of drawing data obtained by a drawing management system of one embodiment of the present invention. 5A is a schematic diagram showing a third example of drawing data obtained by the drawing management system of one embodiment of the present invention, and FIG. 5B is an enlarged view of a main portion of FIG. 5A. FIG. 13 is a schematic diagram showing a fourth example of drawing data obtained by the drawing management system of one embodiment of the present invention. FIG. 13 is a schematic diagram showing a fifth example of drawing data obtained by the drawing management system of one embodiment of the present invention. 1 is a flowchart showing an example of management of drawings using a drawing management system according to an embodiment of the present invention.

<<About a drawing management system according to one embodiment of the present invention>>
Hereinafter, one embodiment of the present invention (hereinafter, the present embodiment) will be described with reference to the accompanying drawings.
In the drawings, the illustrations are somewhat simplified and schematic in order to make the explanation easier to understand, and the sizes (dimensions) shown in the drawings are also different from the actual ones.

[Drawing management system]
FIG. 1 is a schematic diagram showing an example of a drawing management system according to an embodiment of the present invention.
The drawing management system 10 shown in FIG. 1 includes a processing unit 12 , an input unit 14 , and a display unit 16 .
The processing unit 12 includes an acquisition section 20, a comparison section 22, an extraction section 24, an identification section 26, a data creation section 28, a storage section 30, a memory 32, and a control section 34. Each section of the processing unit 12 is controlled by the control section 34.
In the drawing management system 10, the processing unit 12 may be configured using hardware such as a computer that functionally forms each of the acquisition unit 20, comparison unit 22, extraction unit 24, identification unit 26, data creation unit 28, and storage unit 30 by executing a program (computer software) stored in ROM or the like in the control unit 34, or each part may be a dedicated device composed of a dedicated circuit, or it may be configured as a server to be executed on the cloud.

The input unit 14 is, for example, one of various input devices for inputting various information to the processing unit 12 in response to an instruction from an operator. The input unit 14 is, for example, a mouse and a keyboard. The input unit 14 may also input image data to the memory 32 from a storage medium (not shown) in which image data of an image including a drawing of a building written on a page and written information written on the page is stored as storage data. In this case, the input unit 14 has, for example, an interface (not shown) corresponding to the acquisition unit 20 or the memory 32, and stores the above-mentioned storage data from the storage medium to the acquisition unit 20 or the memory 32 via the interface.

The display unit 16 displays, for example, an image represented by image data or drawing data obtained by the drawing management system 10, and may be any of a variety of known displays. The display unit 16 also includes a device such as a printer for displaying image data or drawing data on an output medium such as paper.
Furthermore, the drawing management system 10 can display images represented by image data and images represented by drawing data on a screen of a smartphone (not shown) or a tablet terminal (not shown), etc. In this case, the smartphone or tablet terminal is the display unit 16 and also serves as the input unit 14.

<Processing unit 12>
2A to 2E are schematic diagrams showing an example of management of drawings in the order of steps using the drawing management system of one embodiment of the present invention.
The acquisition unit 20 acquires image data 50 (see FIG. 2(b)) of an image 45 (see FIG. 2(a)) including a drawing 42 (see FIG. 2(a)) representing a building written on a sheet of paper 40 (see FIG. 2(a)) and written information 44 (see FIG. 2(a)) written on the sheet of paper 40. The image data 50 refers to image data represented as data that can be processed by a computer. The image data includes digital data representing the above-mentioned image 45 (see FIG. 2(a)).
The written information 44 is, for example, instructions for changes to the design of the building, confirmation items regarding the design of the building, and the like, and is written directly on the paper 40 on which the drawing 42 is drawn. The written information 44 includes characters, symbols, figures, various lines, and the like written on the paper 40.
The method of writing the written information 44 on the paper surface 40 is not particularly limited, and the information may be handwritten or printed and pasted on the paper surface 40 .
The acquiring unit 20 is not particularly limited as long as it can acquire the above-mentioned image data 50 (see FIG. 2B). Examples of the acquiring unit 20 include an imaging device such as a scanner, a digital camera, or a smartphone. That is, the processing unit 12 may include an imaging device that functions as the acquiring unit 20.
In addition, as the image data, image data stored in a storage medium as described above can be used, and the image data can be acquired from outside the drawing management system 10. For this reason, the acquisition unit 20 is not necessarily required in the drawing management system 10.

The comparison unit 22 compares the image data acquired from the acquisition unit 20 or from outside with the drawing data stored in the storage unit 30. The comparison unit 22 determines whether the image data and the drawing data stored in the storage unit 30 match or do not match, and also determines whether they are related to each other.
If the comparison unit 22 determines that there is related drawing data between the image data and the drawing data 60 (see Figure 2 (d)) stored in the storage unit 30, the drawing data obtained from the image data is associated with the drawing data determined to be related and stored in the storage unit 30.
Through the comparison by the comparison section 22 , it can be determined whether the image data is related to the drawing data stored in the storage section, is newly created, or is the same as the drawing data stored in the storage section 30 .
When it is determined that the image data is the same as the drawing data stored in the storage unit 30, the process of extracting written information, which will be described later, is not performed. This makes it possible to prevent the drawing data from being stored in the storage unit 30 in duplicate, and to prevent unnecessary processing.

If management information such as a management number or a barcode is attached to the paper surface 40 (see FIG. 2A), the comparison unit 22 uses the management information to make the comparison. The management information includes, for example, identification information of a drawing 42 representing a building, and information such as the date and time when the written information 44 was written.
The type of barcode is not particularly limited, and may be a one-dimensional code, a two-dimensional code, or any other format such as JAN, EAN, NW-7, CODE39, or the like.
Here, due to design changes of the building, the drawings may be changed, more specifically, revised or amended. In this case, the building remains the same but the drawings have changed. When the building drawings are changed, the management information is also updated. In this case, the management information before the update includes information indicating the version. By using this information indicating the version, it is possible to determine whether the image data is related to the accumulated drawing data.

The extraction unit 24 extracts imaged written information from the image data 50 (see FIG. 2B). The method for extracting the written information is not particularly limited, and a known image analysis method can be used.
When extracting written information from image data 50, extraction unit 24 sets grid lines 55 (see FIG. 2(b)) virtually perpendicular to image data 50, and divides image 51 (see FIG. 2(b)) represented by image data 50 into a plurality of grid areas 55a (see FIG. 2(b)). It is preferable for extraction unit 24 to extract written information for each grid area 55a partitioned by grid lines 55. By using grid areas 55a as a guide to extract written information, it is possible to easily extract written information and also to easily identify the extraction position.
Specifically, the extraction unit 24 extracts an area 52 (see FIG. 2(b)) in the image data 50 that corresponds to a drawing 42 (see FIG. 2(a)) representing a building, and divides the image data 50 into the area 52 that corresponds to the drawing 42 representing the building and an area 54 (see FIG. 2(b)) other than the area 52 that corresponds to the drawing 42 representing the building.
Next, as described above, the image 51 represented by the image data 50 is divided into a plurality of grid areas 55a, and then writing information is extracted from the area 52 corresponding to the drawing 42 representing the building and from an area 54 other than the area 52 corresponding to the drawing 42 representing the building.

The area 54 other than the area 52 corresponding to the drawing 42 representing the building corresponds to the margin of the paper surface 40 (see FIG. 2(a)).
The number of pieces of written information is not limited to one, but is often multiple. For this reason, it is preferable to specify the extraction position of the extracted written information and store the information of the extraction position of the extracted written information in the memory 32. The multiple pieces of written information are classified by the identification unit 26 as described later. By classifying the written information, the relationship between the written information can be clarified.

The identification unit 26 acquires at least text information from the written information in the image data 50. Acquiring the text information means converting the text information into text that can be processed by a computer.
The method of acquiring text information by the identification unit 26 is not particularly limited as long as it can produce text that can be processed by a computer, and publicly known OCR (Optical Character Recognition) technology, image analysis technology, and pattern matching technology can be used.
The written information may contain lines or figures, and the recognition unit 26 can extract the lines and figures using known image analysis techniques, pattern matching techniques, or the like.
The text information of the written information in the image data acquired by the recognition unit 26 is stored in the memory 32 .

Furthermore, when a plurality of pieces of written information are extracted by the extraction unit 24, the identification unit 26 classifies each piece of written information. The classification of written information will be described later.
When classifying written information, even if multiple pieces of written information are extracted, they may actually be one piece of written information. In this case, for example, a block analysis used in a known OCR can be used as a method for determining the range in which multiple pieces of written information are regarded as one piece of written information.
The identification unit 26 can also change an area 54 (see FIG. 2(b)) other than the area 52 (see FIG. 2(b)) corresponding to the drawing 42 representing the building to a blank area 54a (see FIG. 2(c)). Changing the above-mentioned area 54 to a blank area 54a means making it an area of only background color without any text information, etc., in the image 51 (see FIG. 2(b)) represented by the image data 50 (see FIG. 2(c)). By changing to a blank area 54a as described above, text information is added to an area of the image 51 represented by the image data 50 that has no text information, etc., so that the text information can be easily added to the image data 50.
Changing the above-mentioned area 54 (see FIG. 2B) to a blank area 54a (see FIG. 2C) is also referred to as blanking.

The data creation unit 28 adds the text information of the written information acquired by the identification unit 26 to the image data 50 so that text information 62 (see Figure 2 (d)) is displayed in the image 51 represented by the image data 50, thereby creating drawing data 60 (see Figure 2 (d)).
The data creation unit 28 sets the position at which the text information is to be displayed in the image 51 represented by the image data 50. The position at which the text information is to be displayed will be described in detail later.
The data creation unit 28 also adds the display area of the text information in the image data and the contents of the text information to the image data. Even if the written information is a figure and a line, the data representing the display position in the image data and the figure or line is added to the image data in the same manner as the text information. The data representing the figure or line is not particularly limited and may be raster data or vector data.
In this way, the data creation unit 28 can digitize the text information and the like written on the building drawings.
The data creating unit 28 can also add the creation date and time of the drawing data 60 to the drawing data. The creation date and time of the drawing data 60 can be added using, for example, a time stamp.
The data creating unit 28 can also add at least one of the date and time when the written information was written and the user information of the user who wrote the written information to the image data. This is preferable because it makes it easy to identify the date when the written information was written and the user who wrote it in the drawing data 60.

The storage unit 30 stores the drawing data 60 (see FIG. 2D ) created by the data creation unit 28. The storage unit 30 is not particularly limited, and various known storage media, such as a hard disk drive (HDD) and a solid state drive (SSD), can be used.
If the drawing data 60 is newly created, the drawing data 60 is stored in the storage unit 30 as is.
In the case of drawing data 60 obtained from image data that the comparison unit 22 has determined to be related, the drawing data 60 is stored in the storage unit 30 in association with the related drawing data 60 as shown in Fig. 2(e) . Storing the drawing data 60 in the storage unit 30 in association with the drawing data 60 makes it possible to follow and confirm, for example, instructions for design changes of a building and confirmation items regarding the design of the building in chronological order, and thus makes it possible to grasp the process from designing a building to its completion, which is preferable.
Furthermore, the drawing data stored in the storage unit 30 may be made unchangeable.

The memory 32 temporarily stores data on the processing process of each part of the processing unit 12. It also stores image data 50 (see FIG. 2B) of an image including a drawing of a building written on a sheet of paper and written information written on the sheet of paper, which is input from the input unit 14 as described above. The memory 32 also stores information on the extraction position of the extracted written information and text information of the written information in the image data.
The memory 32 can have the same configuration as the storage unit 30, and can use various known storage media, for example, HDD and SSD.
With the above-described configuration, the drawing management system 10 can digitize text information and the like written on building drawings.

Next, extraction of written information and classification of written information will be described.
FIG. 3(a) is a schematic diagram showing an example of image data acquired by a drawing management system of one embodiment of the present invention, (b) is an enlarged view of a main portion of FIG. 3(a), and (c) is an enlarged view of a main portion of FIG. 3(a).
In addition, in FIGS. 3(a) to 3(c), the same components as those in FIGS. 2(a) to 2(e) are denoted by the same reference numerals, and detailed description thereof will be omitted.

Regarding the image data 50 shown in Figure 3 (a), we will explain the case where written information is extracted in a first area 56 and a second area 57 in an area 54 other than an area 52 corresponding to a drawing 42 representing a building (see Figure 2 (a)).
3B, first written information 56a and second written information 56b are extracted from the first region 56. In addition, the position information of each piece of written information on the paper surface of the first written information 56a and the second written information 56b is specified, and the extracted positions are specified.
For example, the information is classified based on the extraction position of the first written information 56a and the extraction position of the second written information 56b. In this case, a threshold is set for the distance between the extraction positions, and if the distance exceeds the threshold, the first written information 56a and the second written information 56b are classified into different groups.
When the distance between the extraction positions is equal to or less than a threshold, the first written information 56a and the second written information 56b are classified into the same group. The threshold for classifying the information as the same may be set in stages even when the distance between the extraction positions is equal to or less than a threshold. In this case, when the distance between the extraction positions is closer and is equal to or less than the threshold for classifying the information as the same, the information is classified as the same.
Additionally, block analysis as used in known OCR techniques as described above may be used to separate and classify the written information.
For example, posted information classified into the same group is assumed to have been posted by the same person, and posted information classified into different loops is assumed to have been posted by different people.

In addition, when there is text information of the first written information 56a and the second written information 56b, if the character orientations are different, they can be classified into different groups, and if the character orientations are the same, they can be classified into the same group. The character orientation is the direction in which a character string is written on the paper, and more specifically, the direction in which one or more characters included in the character string are arranged relative to the top, bottom, left, and right of the paper.
Also, classification may be performed using handwriting. If handwriting is the same, the images are classified into the same group even if the distance between the extracted positions exceeds a threshold.
On the other hand, if the handwriting is different, the handwriting is classified into a different group even if the distance between the extraction positions is equal to or less than the threshold value.
The above-mentioned classification into groups may be performed by appropriately combining the distance of the extraction position, the direction of the characters, and the handwriting. The handwriting may also include the writing pressure. A pattern matching technique may be used to determine whether the handwriting matches. Alternatively, the handwriting may be registered in advance, and the registered handwriting may be used to determine whether the handwriting matches.
By using position information of the written information on the paper or the orientation of characters in the written information, the written information can be easily classified.

Here, FIG. 4(a) is a schematic diagram showing a first example of drawing data obtained by a drawing management system of one embodiment of the present invention, and FIG. 4(b) is a schematic diagram showing a second example of drawing data obtained by a drawing management system of one embodiment of the present invention.
In addition, in FIGS. 4(a) and (b), the same components as those in FIGS. 2(a) to (e) are denoted by the same reference numerals, and detailed description thereof will be omitted.

If the distance between the extraction positions of the first written information 56a and the second written information 56b shown in FIG. 3B exceeds a threshold value and the handwriting is the same, the first written information 56a and the second written information 56b are classified into the same group.
4A, first text information 62a based on the first written information 56a and second text information 62b based on the second written information 56b are added to the image data so as to be displayed. The first text information 62a and the second text information 62b also include user information describing the written information.
Furthermore, the drawing data 60 can also display date information 63 on which the written information was written.

If the distance between the extraction positions of the first written information 56a and the second written information 56b shown in FIG. 3B is equal to or less than a threshold value and the handwriting is different, the first written information 56a and the second written information 56b are classified into different groups.
4A, first text information 62c based on the first written information 56a and second text information 62d based on the second written information 56b are added to the image data so as to be displayed. The first text information 62c and the second text information 62d also include user information describing the written information.
In the first text information 62c and the second text information 62d shown in Fig. 4(a), the text information of the written information is added to the image data so that the text information is displayed at a position corresponding to the area in the image data from which the written information is extracted. This makes it easy to recognize the written information because the position of the written information corresponds to the position on the drawing data.

Furthermore, if the distance between the extraction positions of the first written information 56a and the second written information 56b shown in FIG. 3B exceeds a threshold value and the character orientations are different, the first written information 56a and the second written information 56b are classified into different groups.
4B, first text information 64a based on the first written information 56a and second text information 64b based on the second written information 56b are added to the image data so as to be displayed. The first text information 64a and the second text information 64b also include user information describing the written information.
In addition, if multiple pieces of written information are classified into different groups, and there are multiple groups, the written information may be displayed together for each group.

In the second area 57 shown in FIG. 3(a), the third written information 58, the fourth written information 59a, and the fifth written information 59b are extracted, as shown in FIG. 3(c), and the extraction positions of the written information are also identified.
The third written information 58 and the fourth written information 59a are classified into the same group when the distance between their extracted positions is equal to or smaller than a threshold value.
When the third written information 58 indicates a line 58a and the fourth written information 59a indicates text information, if one end 58b of the line 58a is an arrow and the other end 58c is a line, the third written information 58 is determined to be a line including an arrow.
Furthermore, the fourth written information is determined to be text information related to the location indicated by the arrow. In this case, for example, text information based on the fourth written information is arranged near the location indicated by the arrow. Even in the case of a direction line without an arrow, which will be described later, when there is written information near one end of the direction line and the direction line is classified into the same group, text information based on the written information is arranged near the location indicated by the other end of the direction line.

Here, FIG. 5(a) is a schematic diagram showing a third example of drawing data obtained by the drawing management system of one embodiment of the present invention, and (b) is an enlarged view of a main part of FIG. 5(a).
In addition, in FIGS. 5(a) and (b), the same components as those in FIGS. 2(a) to (e) are denoted by the same reference numerals, and detailed description thereof will be omitted.
The third written information 58 and the fourth written information 59a shown in Fig. 3C belong to the same group. The fourth written information 59a and the fifth written information 59b shown in Fig. 3C are classified into different groups when the extraction positions exceed the threshold value.
As shown in the drawing data 60 of FIG. 5(a), the fourth text information 65a based on the fourth written information 59a and a portion 66 of the image of the second area 57 shown in FIG. 3(c) are added to the image data so as to be displayed.
5(a), a part of the line 58a extracted from the third written information 58 and an arrow may be displayed in an area 67 corresponding to the position of the third written information 58 as shown in FIG. 5(b), and fourth text information 67a based on the fourth written information 59a may be displayed near the arrow. Also, instead of a line with an arrow, an indication line without an arrow may be displayed.
In this way, it is preferable to add the fourth text information 67a based on the fourth written information 59a to the image data so that it is displayed at a location set based on the position of the tip of the arrow or indication line, since this makes it possible to clearly indicate the location, etc., indicated by the written information.

Even if the text information is classified into the same group as described above, there may be no space to display text information based on written information in area 54 other than area 52 corresponding to drawing 42 representing the building in image data 50. In this case, text information 68 and text information 69 of the same group may be displayed apart, as in drawing data 60 shown in FIG. 6, and a line 70 may be added to indicate that text information 68 and text information 69 are in the same group.

7, the drawing data 60 may be divided into a first area 60a and a second area 60b. For example, the data may be configured such that only text information 71, 72, and 73 are displayed in the first area 60a. The second area 60b may display text information 74 and information other than the text information. The information other than the text information may be, for example, an image 75.
The drawing data 60 is not limited to being divided into two areas, the first area 60a and the second area 60b, but may be divided into three or more areas.
Furthermore, when there are a plurality of areas, for example, a keyword may be set and written information relating to the corresponding keyword may be displayed.
The display form of the text information is not particularly limited, and may be, for example, a combination of user information including the user's job, such as sales or design, and the contents of the written information.

[Drawing management method]
The drawing management method will be described below.
FIG. 8 is a flow chart showing an example of management of drawings using the drawing management system according to one embodiment of the present invention.
The drawing management method is implemented, for example, by using the drawing management system 10 shown in FIG.
First, image data 50 (see FIG. 2(b)) of an image 45 (see FIG. 2(a)) including a drawing 42 (see FIG. 2(a)) representing a building written on a page 40 (see FIG. 2(a)) and written information 44 (see FIG. 2(a)) written on the page 40 is acquired by the acquisition section 20 of the processing unit 12 shown in FIG. 1 (step S10). In step S10, the image of the page 40 is converted into image data.
As described above, the image data 50 may be image data stored in a storage medium, and the image data 50 may be obtained from outside the drawing management system 10. Therefore, step S10 is not necessarily required.

Next, the date information on which the written information was written, the date and time when the image data was converted, and the information of the worker who converted the image data are added to the image data (step S12).
Note that step S12 is not necessarily required since it may be performed together with step S26 described later.

In step S12, if management information has been added to the paper surface 40, the management information is added to the image data.
Next, the image data acquired by the acquisition unit 20 is compared with the drawing data stored in the storage unit 30 to determine whether the image data acquired by the acquisition unit 20 is new or not (step S14).
In step S14, if the image data acquired by the acquisition unit 20 is not new, the following process is not performed. To determine whether the image data acquired by the acquisition unit 20 is new or not, for example, identification information of the drawing 42 representing the building and information such as the date and time when the written information was written are used.
If the identification information representing the drawing 42 representing a building in the acquired image data matches the identification information of the drawing 42 representing a building in the drawing data stored in the storage unit 30, and the information on the date and time when the written information was written matches, it is determined that the image data acquired by the acquisition unit 20 is not new.
In addition, if the identification information representing the drawing 42 representing the building in the acquired image data and the identification information of the drawing 42 representing the building in the drawing data stored in the storage unit 30 are different, for example, only in version, it is determined that they are related.

In step S14, if the acquired image data is new or related, written information is extracted from the image data (step S16).
In step S16, the extracting unit 24 extracts the written information from the image data. For example, the extracted written information is extracted for each of the plurality of grid regions 55a set in the image 51 indicated by the image data 50.
Next, the recognition unit 26 acquires at least text information from the written information (step S18). In addition to the text information, image information such as lines and figures is acquired from the written information. This makes it possible to obtain information on various figures and leader lines.
The text information can be obtained using the known OCR technology as described above, and the image information can be obtained using the known image analysis technology or pattern matching technology as described above.

Next, when a plurality of pieces of written information are extracted by the extraction unit 24, the identification unit 26 classifies each piece of written information (step S20).
In step S20, the written information is classified using the distance from the extracted position of the written information, the orientation of characters represented by the text information, handwriting, and the like, as described above.

Next, in the image 51 indicated by the image data 50 (see FIG. 2(b)), the area 54 (see FIG. 2(b)) other than the area 52 (see FIG. 2(b)) corresponding to the drawing 42 representing the building is changed to a blank area 54a (see FIG. 2(c)) (step S22).
In step S22, changing area 54 (see FIG. 2(b)) to blank area 54a (see FIG. 2(c)) (blanking) means that image 51 represented by image data 50 (see FIG. 2(c)) is made to have no text information or the like as described above. By changing to blank area 54a as described above, text information is added to an area of image data 50 that has no data, making it easy to add text information to image data 50.

Next, the data creation unit 28 adds the text information of the written information to the image data 50 so that the text information is displayed in the image 51 represented by the image data 50 (step S24).The drawing data is obtained by step S24.
In step S24, for example, the display area of the text information in the image data and the content of the text information are added to the image data. In addition, in the case of figures and lines, the display position in the image data and data representing the figure or line are added to the image data in the same manner as the text information.
The data representing the figure or line is not particularly limited, and may be raster data or vector data.

Next, the data creating unit 28 adds to the drawing data the creation date and time of the drawing data, the date and time of writing the written-in information, user information who wrote the written-in information, and the like (step S26).
In step S26, a time stamp can be used to add the creation date and time of the drawing data.
Next, the created drawing data 60 (see FIG. 2D) is stored in the storage unit 30 (step S28).
In step S28, if the drawing data 60 is newly created, the drawing data 60 is stored in the storage unit 30 as is.
On the other hand, if the comparison unit 22 determines in step S14 that the image data acquired by the acquisition unit 20 and the drawing data stored in the storage unit 30 are related to each other, then in step S28, the drawing data obtained from the image data acquired by the acquisition unit 20 is stored in the storage unit 30 in association with the compared drawing data. In this manner, the building drawings are managed.

As described above, when a building is designed and completed, various drawings such as a site plan, layout plan, floor plan, and elevation plan are created. These drawings may be changed several times before the construction is completed. In the drawing management system, if the acquired image data is related to the drawing data stored in the storage unit, the drawing data is created as described above. In this case, text information is acquired for the written information, but even if the image data acquired this time and the text information of the written information are in the drawing data that has already been created, the text information of the same written information is acquired again.
In addition, in the case of drawings related to the drawing data stored in the storage unit, the drawing showing the building may be partially rewritten or completely rewritten due to design changes or the like.

So far, one embodiment of the drawing management system of the present invention has been described, but the above embodiment is merely an example to facilitate understanding of the present invention and does not limit the present invention. In other words, the present invention can be modified and improved without departing from its spirit. Furthermore, the present invention naturally includes its equivalents.

LIST OF SYMBOLS 10 Drawing management system 12 Processing unit 14 Input section 16 Display section 20 Acquisition section 22 Comparison section 24 Extraction section 26 Identification section 28 Data creation section 30 Storage section 32 Memory 34 Control section 40 Paper surface 42 Drawing 44 Written information 45, 51 Image 50 Image data 52, 54 Area 54a Blank area 55 Grid line 55a Grid area 56 First area 56a First written information 56b Second written information 57 Second area 58 Third written information 58b, 58c End 59a Fourth written information 59b Fifth written information 60 Drawing data 60a First area 60b Second area 62a First text information 62b Second text information 62c First text information 62d Second text information 63 Date information 64a First text information 64b Second text information 65a Fourth text information 67 Area 67a Fourth text information 68, 69, 71, 72, 73, 74 Text information 75 Image

Claims (10)

An extracting unit that extracts the written information from image data of an image including a drawing of a building written on a sheet of paper and the written information written on the sheet of paper;
an identification unit that acquires at least text information from the written information in the image data;
a data creation unit that creates drawing data by adding the text information of the writing information acquired by the identification unit to the image data so that the text information is displayed in an image represented by the image data;
A drawing management system having a storage unit that stores the drawing data. The drawing management system according to claim 1, further comprising an acquisition unit that acquires the image data of the image including the drawing representing the building written on the paper and the written information written on the paper. The drawing management system according to claim 1, wherein the extraction unit divides the image represented by the image data into a plurality of regions and extracts the written information for each of the regions. The drawing management system according to claim 1, wherein the data creation unit adds the text information of the written information to the image data so that the text information is displayed at a position in the image data corresponding to an area from which the written information is extracted. The drawing management system of claim 1, wherein, when the written information written on the paper includes an arrow or a pointer line, the data creation unit adds the text information based on the written information to the image data so that the text information is displayed at a location set based on the position of the tip of the arrow or the pointer line. The drawing management system of claim 3, wherein when the extraction unit extracts multiple pieces of written information, the identification unit classifies each piece of written information. The drawing management system according to claim 6, wherein the classification of the written information by the identification unit uses position information of each of the written information on the paper surface or the orientation of characters in the written information. The drawing management system of claim 1, wherein the data creation unit changes areas of the image represented by the image data other than the area corresponding to the drawing representing the building on the paper surface to blank areas, and then adds the text information to the image data so that the text information based on the written information is displayed in the blank areas. The drawing management system according to claim 1, wherein the data creation unit adds at least one of the user information of the user who wrote the written information and the date information on which the written information was written to the image data. a comparison unit that compares the image data of the image including the drawing representing the building written on the paper and the written information written on the paper with the drawing data stored in the storage unit,
A drawing management system as described in any one of claims 1 to 9, wherein when the comparison unit determines that there is drawing data related to the image data among the drawing data stored in the storage unit, the drawing data obtained from the image data is associated with the related drawing data and stored in the storage unit.

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