JPH0883333A - System for automatically recognizing electric pole from facility drawing - Google Patents

Abstract

PURPOSE: To simply check an automatic recognition result of an electric pole(EP) and to quickly and easily correct or add a misrecognized or unrecognized EP. CONSTITUTION: A picture of a facility drawing is read out by a picture reading means A as image data and the image data are processed by an EP symbol extracting means C to extract an EP symbol and its positional information. While referring to facility information read out by a facility information reading means B, an HP recognizing means D allocates an EP identification code to each EP symbol. A recognized result checking/correcting means E checks a recognized result by a table display and easily corrects or adds the recognized result together with an unrecognized EP arranging means G.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention utilizes the equipment information of an equipment master in which information on the equipment is recorded from equipment drawings of equipment having a large number of utility poles such as electric power distribution equipment and telephone public line equipment. , Automatic pole recognition system for automatically recognizing the position of each pole and creating data that can be processed by a computer.

[0002]

2. Description of the Related Art For example, since overhead power distribution facilities such as utility poles and distribution lines owned by each power company are a vast amount of facilities, if the management work of these facilities can be made efficient, the management cost will be greatly reduced. Can be expected. Further, by effectively utilizing the distribution facility information directly connected to the customer, it can be expected to improve the service to the customer.

Therefore, the overhead distribution equipment information that has been conventionally described in the equipment ledger, that is, the drawing number of the distribution equipment drawing, the utility pole identification code of each utility pole existing on the distribution equipment drawing, the utility pole type, and the connection relationship between utility poles. , And distribution facility information including distances to adjacent utility poles, etc. are recorded in the distribution facility master as data that can be processed by a computer, and already stored in a database.

However, the management of the geographical actual position and installation status of overhead distribution equipment such as electric poles is generally performed based on the distribution equipment drawing (distribution line drawing) which is a hand-drawn paper drawing. Target. For example, when performing work such as new installation or renewal of power distribution equipment, make a copy of the relevant location from the distribution equipment drawing that includes the relevant location, and write down the construction instructions in red. To create. Based on this, an order is placed with a construction company, and after the construction is completed, the wiring equipment drawing is corrected again by hand, and all is done by hand, which is a bottleneck for improving work efficiency.

Therefore, in recent years, it has been attempted to take out the information on the actual position of the electric pole from the distribution equipment drawing, store it in a computer, and use it for design, integration, equipment management and the like. If the information of distribution facility drawings can also be imported into the computer, not only direct work related to drawings such as drawing and correction of drawings due to construction, but also creation of construction instructions by the electric power company, online construction ordering to construction companies, Even a contractor can build a system that manages the overall flow of material estimation, completion reports to the ordering power company, and inspections.

In order to realize such a system,
Information required from distribution facility drawings, such as location information of utility poles,
It depends on how low-cost the data can be entered as computer-processable data.

The following methods have been developed so far for inputting the position information of utility poles from a distribution facility drawing. 1. Using a digitizer, etc., on the distribution equipment drawing or
A method in which the operator specifies and inputs the pole position on the display screen one by one, and the pole identification code is entered by the operator from the keyboard after reading the drawing.

2. A method to create a new drawing that only shows the utility pole symbol and utility pole identification code from the existing power distribution equipment drawing, and automatically recognizes the drawing to determine the utility pole position. 3. All equipment symbols such as utility poles, electric wires, utility pole identification codes on the distribution equipment drawings are automatically recognized by computer using image processing and OCR technology, and the recognition result is compared with the information held by the distribution equipment master. A method for finding recognition errors.

[0009]

[Problems to be Solved by the Invention] However, 1 and 2
The method of (1) requires a manual operation of a person or a redrawing of the drawing, and therefore has a problem that it takes a lot of time and labor to input the pole pole position information.

In the method of 3, the computer recognizes all the equipment symbols, so it does not seem to be a human effort. However, the current technology copes with blurring, duplication, and intersection of line segments that are always present in hand-drawn drawings. There is a lot of misrecognition and unrecognizable things without sufficient ability. Therefore, even if a recognition error is found by comparing the recognition result with the information held by the distribution equipment master, it is necessary to manually correct the error or to additionally input the unrecognized error, but the work is easy. However, there is a problem that a large input cost is eventually required.

All of these conventional pole pole position information input methods attempt to accurately obtain the necessary information only from the information described in the power distribution equipment drawing, which increases human involvement and increases the input cost. It was inevitable. Therefore, the present inventors pay attention to this point, and use the image information read from the power distribution facility drawing and the information about the power pole from the facility master, which is the database already used by the power company for facility management as described above. Then, we have already developed an automatic utility pole recognition system that can accurately recognize the position information of each utility pole on the drawing and also automatically assign the utility pole identification code to each utility pole symbol.

According to this automatic utility pole recognition system, the geographical position information of each utility pole existing there can be accurately recognized from the existing power distribution equipment drawing without redrawing the power distribution equipment drawing as in the prior art. Since the telephone pole identification code can be automatically added to each telephone pole symbol, human involvement is reduced and the input cost can be significantly reduced. However, it is impossible to completely recognize 100% of all poles on the distribution equipment drawing, so it is still necessary to confirm the recognition result. As a result, some misrecognition (including duplicate recognition) and unrecognized For that, I had to do some work on corrections and additional settings.

The present invention has been made in view of the above technical background, and in an automatic utility pole recognition system from a facility drawing having a utility pole such as the above-mentioned distribution facility drawing or telephone public line facility drawing, Improve recognition accuracy,
Moreover, it is an object of the present invention to easily confirm the recognition result, and to make correction and addition easily in a short time when there is a misrecognized or unrecognized electric pole.

[0014]

In order to achieve the above object, the present invention provides an automatic utility pole recognition system from a facility drawing including the following means, as shown in the functional block diagram of FIG.

Telephone poles, branch lines, corresponding to the actual positions on the map,
Image reading means A for reading as an image data an image of a facility drawing in which a symbol of a facility including a utility pole such as a pole or overhead line and a utility pole identification code are drawn, a drawing number of the facility drawing,
Image reading means A from the equipment master in which equipment information including the utility pole identification code of each utility pole existing on the equipment drawing, the connection relationship between the utility poles, and the distance to the adjacent utility pole is stored.
Equipment information reading means B for reading equipment information corresponding to the equipment drawing read by

Utility information is read for each utility pole symbol extracted by the utility pole symbol extracting means C and utility pole symbol extracting means C for image-processing the image data read by the image reading means A and extracting the utility pole symbol together with its position information. Utility pole recognizing means D for recognizing the position of each utility pole and assigning a utility pole identification code by referring to the equipment information read by the means B,

Of the utility pole symbols extracted by the utility pole symbol extracting means C, the utility pole symbols to which the utility pole identifying code is assigned by the utility pole identifying means D are assigned as image images in the order of low certainty of recognition by the utility pole recognizing means D. The utility pole identification code is displayed in a list, and when any one of the displayed columns is instructed by the instruction means F, an image image of an equipment drawing of a predetermined area including the utility pole symbol in the column is displayed in a window, Recognition result confirmation / correction means E which enables selection, correction or confirmation of a utility pole identification code for the utility pole symbol,

In the above-mentioned automatic utility pole recognition system, when the recognition result confirmation / correction means E displays a list of the utility pole symbols to which the utility pole identification code is assigned in the order of low reliability of recognition by the utility pole recognition means D, the certainty of the recognition It is advisable to provide a means for highlighting a telephone pole symbol having a low degree of emphasis with a background color or luminance different from that of a telephone pole symbol having a high degree of certainty in recognition.

Of the utility pole identification codes in the equipment information read by the equipment information reading means B, the utility pole recognizing means D was unable to assign the utility pole symbol extracted by the utility pole symbol extracting means C to the utility pole identifying code. While displaying the list of the above, when one of the displayed utility pole identification codes is instructed by the instructing means F, an image image of a predetermined area on the equipment drawing where the utility pole of the utility pole identification code should exist is displayed in a window. When the position of the electric pole on the image is designated, an unrecognized electric pole arranging means G is provided for arranging the electric pole symbol at the position of the electric pole and assigning the specified electric pole identification code to the electric pole symbol. Even better.

Further, the image data of the image of the equipment drawing read by the image reading means A, together with the connecting lines corresponding to the overhead lines between the respective utility poles, the utility pole symbols to which the utility pole identification codes are assigned and the positions of the utility poles are fixed. It is advisable to provide a utility pole symbol / connecting line display means H that is superimposed and displayed.

In this case, when the connection lines are displayed between the utility pole symbols on the utility pole symbol / connection line display means H, the connection relationship between the utility poles and the distance to the connected utility poles are as follows.
If the connection relationship between the utility poles and the distance to the utility pole to be connected based on the equipment information read from the equipment master by the equipment information reading means B does not match, the connection line is made different in color from other connection lines or has different brightness. It is more preferable to provide means for highlighting by displaying and a means for making the position of the displayed electric pole symbol movable by the instruction of the instruction means F.

[0022]

The automatic utility pole recognition system from a facility drawing according to the present invention uses, as image data, an image of a utility pole symbol, a utility pole identification code, an overhead line, etc., drawn on the facility drawing by each means A to D in FIG. It is read and image-processed to extract telephone pole symbols together with their position information. On the other hand, the equipment information corresponding to the read equipment drawing is read from the equipment master, and for each of the extracted utility pole symbols, the position of each utility pole is recognized by referring to the read equipment information and the utility pole identification code is assigned. . In this way, the position information of each telephone pole can be automatically recognized and recorded in the recording means I as data.

When the recognition result confirmation / correction means E is provided, the utility pole symbols to which the utility pole identification code has been assigned (including duplicate assignment) among the extracted utility pole symbols are displayed as image images in ascending order of reliability of the recognition. Display a list with the telephone pole identification codes assigned. Therefore,
Confirm the utility pole symbol and utility pole identification code in each of the displayed columns, and designate a field with a low degree of certainty of recognition with an instruction means F such as a pointing device (mouse). An image of the equipment drawing is displayed in a window.

Looking at the utility pole symbol and the image image displayed in that window, the utility pole identification code is selected (when it is assigned redundantly), corrected (when the wrong utility pole identification code is assigned) or confirmed (correct. (When the telephone pole identification code is assigned) can be easily performed.

When the utility pole symbols to which the utility pole identification code is assigned are displayed in a list in the ascending confidence level of recognition, the utility pole symbols having a low certainty degree of recognition are in the background of the high utility pole symbols. By highlighting with different colors or different luminances, it is possible to easily identify a telephone pole symbol with a low degree of certainty in recognition, and it is easier to confirm and correct the telephone pole identification code for the telephone pole symbol.

Further, when the unrecognized utility pole arranging means G is provided,
Among the utility pole identification codes in the read equipment information, for the utility pole identification codes that could not be assigned to the extracted utility pole symbols, a list is displayed. When designated by F, an image image of a predetermined area on the equipment drawing where the utility pole of the utility pole identification code should exist is displayed in a window. Therefore, when the position of the electric pole on the image is designated, the electric pole symbol is arranged (displayed) at the position of the electric pole, and the designated electric pole identification code is assigned to the electric pole symbol. Therefore,
It becomes easy to acquire position information and assign a utility pole identification code to an unrecognized or misrecognized utility pole.

Further, a utility pole symbol / connection line display means H
If you install, the utility pole identification code is assigned, and each utility pole symbol whose position is confirmed is displayed together with the connection line corresponding to the overhead line between the utility poles and the image data of the image of the read facility drawing. It is possible to check the result of the utility pole recognition after modification and addition on the drawing, including the state of the overhead wire to be installed.

In this case, when the connection lines are displayed between the utility pole symbols, the connection relationship between the utility poles and the distance to the connected utility pole are determined by the connection relationship between the utility poles and the connected utility pole based on the equipment information read from the equipment master. If it does not match the distance to, if the connection line is highlighted with a different color or different brightness from other connection lines, it will be easier to identify the utility pole that needs to be repositioned. The position of the telephone pole symbol can also be corrected by moving it according to the instruction of the instruction means. In this way, for all of the utility pole identification codes in the equipment information, the information on the actual position of the utility pole can be recorded in the recording means I.

[0029]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be specifically described below with reference to the drawings. FIG. 2 is a system configuration diagram of an embodiment of the present invention, and FIG. 3 is a block diagram showing an example of its hardware configuration. This telephone pole automatic recognition system, as shown in FIG.
A device body 1 and a display 2 such as a CRT or LCD,
It is composed of a scanner 3, a keyboard 4, a mouse 5 as a pointing device, and a communication device 6.

As shown in FIG. 3, the apparatus main body 1 includes a CPU.
(Central processing unit) 10, memory (ROM, RAM) 1
1, a hard disk drive (HDD) 12 and a system bus 13, and an I / O (input) including a connector (not shown) for connecting the display 2, the scanner 3, the keyboard 4 and the mouse 5, and the communication device 6 to the system bus 13. Output) interface circuit,
The system configuration is similar to that of a normal personal computer.

CPU 10 and R which is a program memory
The OM and the memory 11 including a RAM serving as a data memory and an image memory constitute a microcomputer, and according to a program stored in the ROM, the utility pole symbol extracting means C and the utility pole recognizing means D shown in FIG.
And the display 2 together with the recognition result confirmation and correction means E, the unrecognized utility pole arranging means G, and the utility pole symbol.
Each function of the connection line display means H is fulfilled.

The scanner 3 is an image reading means A which reads an image of a set facility drawing as image data by a CCD line sensor or the like and sends the image data to the apparatus main body 1. The communication device 6 is connected to a host computer (not shown) via a network such as a LAN, and functions of a facility information reading means B that reads facility information from a facility master (database) such as a power distribution facility master and sends it to the device body 1. Fulfill.

The keyboard 4 and mouse 5 are input means for switching, selecting, and instructing various functions, windows, data, etc., and instructing means F in FIG.
Also functions. The hard disk device 12 fulfills the function of a recording means I for recording information such as the position information of each electric pole recognized in a hard disk which is a large capacity information recording medium.

Here, the distribution equipment drawing and the distribution equipment master which are the objects of recognition in this embodiment will be described. In this distribution equipment drawing, for example, as shown in FIG. 4, symbols such as utility poles, branch lines, stanchions, and electric wires (overhead lines) and utility pole identification codes (numbers) are drawn by hand in correspondence with actual positions on the map. It is a drawing. A line drawn as a straight line indicates an electric wire, and a utility pole symbol is drawn on the end of the electric wire as a circle symbol. In addition, the short arrow symbol (attached to the utility poles such as A15, B11, D05, D15) coming out of the utility pole symbol is a branch line that supports the utility pole, and in the case of a support pole, a T-shaped symbol (attached to the utility pole of A10 It is).

The description of the utility pole symbol differs depending on the type of utility pole. For example, a circle with the right half filled in black is a concrete utility pole, a mere circle is a wooden pole, and two parallel diagonal lines within a circle are compound poles. expressing. The circles with crosses are switches and those with other symbols in the circles are other power distribution equipment.

A10 consisting of one alphabetic character (uppercase) and two-digit number written in parentheses near the telephone pole symbol,
Character strings such as B01, C11, and D15 indicate telephone pole numbers (electric pole identification codes). This telephone pole number is A, B, C, each area that divides the north-south (vertical) direction on the drawing into a plurality of areas.
It is shown in capital letters, and the approximate position in the east-west (horizontal) direction is shown as a two-digit number. The telephone pole number indicates which area the vertical and horizontal thin lines demarcate in FIG. It can be understood from.

Various lines connecting between the utility pole symbols indicate electric wires and overhead branch lines (solid lines with wavy lines in the middle), and the electric wires are solid lines, one-dot chain lines, two-dot chain lines, etc., depending on the type and distribution voltage. Differently drawn. However, these distinctions are not necessary when used in the present invention. The numbers in brackets near the wires indicate the distance between the poles.

On the other hand, the distribution facility master corresponds to each distribution facility drawing, its drawing number, the utility pole identification code (number) of each utility pole existing on the distribution facility drawing, the type of utility pole, and the connection relationship between the utility poles. This is a database in which equipment information data such as the distance to an adjacent utility pole, the number of branch lines or columns attached to the utility pole, etc. is recorded. However, the accurate position information of each utility pole and the direction information of the branch lines and columns are not recorded.

In the automatic utility pole recognition system according to the present invention, not only the image data of the distribution facility drawing is subjected to image processing, but also the facility information of the distribution facility master is utilized to the maximum as referenceable information. That is, the image data obtained by reading the image of the distribution facility drawing described above is subjected to image processing, and the accurate position information of each utility pole can be easily obtained by using the facility information of the distribution facility master.

In this system, in addition to automatic recognition of the utility pole symbol and its identification code, it is possible to automatically recognize the branch line / post symbol and its installation direction. In the following description, the utility pole symbol and its identification code are automatically recognized. The explanation will focus on recognition. Therefore, an outline of the telephone pole recognition processing according to this embodiment will be briefly described with reference to FIGS. FIG. 5 is an explanatory diagram for explaining an outline of a utility pole recognition process based on a distribution facility drawing and information of a distribution facility master, and FIG. 6 is an explanatory diagram showing it according to a processing procedure.

As shown in these figures, the distribution facility drawing 7
Is read by a scanner, and the telephone pole symbol S is taken out (extracted) from the image data by image processing. On the other hand, the facility information corresponding to the distribution facility drawing is read from the distribution facility master 8 and the utility pole number (identification code) is read.
Using the position information (indicating the mesh area on the drawing), the utility pole identification code is assigned to each extracted utility pole symbol, and the connection information and the distance information between the utility poles are referred to to identify the recognized utility poles. Telephone pole identification codes of unrecognized telephone poles connected to are sequentially assigned to obtain position coordinates of each telephone pole symbol.

For a utility pole symbol that cannot be uniquely estimated, the operator can easily select the correct utility pole identification code from a plurality of candidates by referring to the original image data displayed on the background. Note that the ID (G15, G14, etc.) in the power distribution equipment master 8 shown in FIG. 5 is a utility pole number, that is, a utility pole identification code, and “con pillar” in the utility pole type column is a concrete utility pole, and (H163 in the adjacent distance column).
0) means that the distance between the electric pole of the electric pole number G15 and the electric pole of the electric pole number H16 is 30 m, and (G14 20) means that the distance between the electric pole of the electric pole number G15 and the electric pole of the electric pole number G14 is 20 m.

Next, a process related to automatic utility pole recognition by the utility pole automatic recognition system shown in FIGS. 2 and 3 will be described with reference to the flowcharts of FIG. FIG. 7 is a main flow of the utility pole automatic recognition processing according to the present invention, which is executed in the order of utility pole symbol extraction processing, utility pole recognition processing, recognition result confirmation and correction processing, unrecognized utility pole placement, and utility pole symbol / electric wire display processing.

Therefore, first, the telephone pole symbol extraction processing will be described with reference to the flowchart of FIG. 8 and FIG. When the electric pole symbol extraction processing of FIG. 8 is started, first, the scanner 3 reads an image of the power distribution equipment drawing 7 to acquire image data as shown in FIG. 9A. Then, the isolated area is deleted as shown in FIG. 11B, and the electric wire portion is removed to leave only the utility pole symbol candidates as shown in FIG.

The filled area of the concrete utility pole is searched from these candidates, and if there is such an area, template matching processing is performed as shown in FIG. 9 (d) to extract the utility pole symbol of the concrete utility pole, and the remaining candidates. The closed area is filled in as shown in (e) of the figure, it is judged whether or not the filled area exists, and if it exists, template matching processing is performed to extract the telephone pole symbol.

In this way, each utility pole symbol on the power distribution equipment drawing read by the scanner 3 is determined, and the coordinates of the utility pole symbol determination result (X at the center position of the utility pole symbol,
The Y coordinate), the determination type, and the telephone pole identification code are recorded in the hard disk of the hard disk device 12, and the process ends.

Next, the telephone pole recognition processing in FIG. 7 will be described with reference to the flowchart in FIG. Figure 10
When the utility pole recognition process is started, the result of the utility pole symbol extraction process described above is first read. Next, the power distribution equipment information is acquired from the power distribution equipment master of the host computer through the communication device 6. Then, the utility pole is identified by the utility pole identification code (the utility pole number), and then the utility pole recognition process is performed based on the connection relationship between the utility poles.

The utility pole identification code indicates a region divided into a mesh on the distribution facility drawing as described above,
For example, the vertical direction in the drawing is 10 divisions of AK (however, I is confusing with 1 and is not used), and the horizontal direction is 1 of 0-99.
A mesh region divided into 00 and divided into 1000 is set, and in principle, each pole identification code (A10, B01, C11, etc.) is attached according to this divided region. However, when there are multiple utility poles in the same divided area, there are exceptions such as assigning unused area numbers in the vicinity.

Therefore, first, each divided area in which the electric pole should exist is discriminated from the electric pole identification code of the distribution facility information, and if there is only one electric pole symbol extracted in the area, the electric pole of the electric pole symbol. The identification code can be confirmed.
Next, the connection relation between the electric poles in the distribution facility information and the connection distance information are narrowed down.

For example, assuming that there are m power pole numbers (power pole identification codes) in the drawing to be recognized, the power pole numbers in the drawing are extracted from the power distribution equipment master as shown in FIG. 11 (a). Let the set be A = {a ₁ , a ₂ , ..., Am}. Also, assuming that n extracted symbols have been extracted from the drawing in the previous process, the set of extracted telephone pole symbols is B =
Let {b ₁ , b ₂ , ..., Bn}.

Estimating the telephone pole number of the extracted telephone pole symbol makes each element of the set A correspond to each element of the set A. Therefore, the extracted symbols bj (1.ltoreq.j.ltoreq.n) existing in the divided area of the telephone pole number ai (1.ltoreq.i.ltoreq.m) are examined and associated. This association is performed with a margin for the left and right Mw meshes and a margin for the upper and lower Mh meshes of the divided area of interest.

At this time, if the type of the telephone pole symbol and the type of the equipment master do not match, the fact that the types are different is recorded and then the correspondence is made. A correspondence set in which the extracted utility pole symbols are associated with each element of the utility pole number set A is L = {L ₁ , L
₂ , ..., Lm}. For example, L ₂ = {b ₂ , b ₃ } indicates that the extracted utility pole symbols b ₂ and b ₃ correspond to the utility pole number a ₂ .

Next, as shown in FIG. 11 (b), attention is paid to the element Li of the set L in which the telephone pole number ai and the extracted telephone pole symbol bi have a one-to-one correspondence and the types are the same. The process of excluding bj from the correspondence of Lj (i ≠ j) having

[0054] In the example shown in FIG. 11 (b), since the extraction utility pole symbols corresponding with set elements L ₃ of the initial correspondence set L ⁰ to utility pole numbers a ₃ is only b _3, the b ₃ from the set elements L ₂ delete. The same processing is performed for other associations, and the result is set to L ¹ . Since only the extracted telephone pole symbol corresponding to the telephone pole number a ₂ in the aggregate element L ₂ is b ₂ , the aggregate element L 2
Delete b ₂ from ₁ . Similarly, processing is performed for other associations, and this processing is repeated until there is no change.

If a plurality of utility pole symbols are associated with one utility pole number even after performing the above processing, the utility poles are referred to by referring to the information on the connection relationship between the utility poles and the connection distance. Narrow the correspondence between the numbers and extracted telephone pole symbols.

In the association set based on the above processing results, the utility pole ai and the utility pole ai + ₁ are connected, and there is one utility pole symbol associated with the utility pole ai, and the utility pole symbol associated with the utility pole ai + ₁ is When there are a plurality of utility pole symbols, the one whose distance to the utility pole symbol associated with the utility pole ai is within a predetermined value (D) from the distance between the utility pole ai and the utility pole ai + ₁ is selected. , The other utility pole symbols are deleted from the correspondence with the utility pole ai + ₁ . If there is a change in correspondence, exclusion processing from another correspondence is performed as in the case described above.

Returning to FIG. 10 again, after the utility pole recognition processing based on the utility pole identification code and the utility pole recognition processing based on the connection relationship between the utility poles are performed, the number of extracted utility pole symbols corresponding to the utility pole identification code and its type match. Whether or not the recognition certainty is determined.

For example, if the telephone pole identification code and the telephone pole symbol have a one-to-one correspondence and the types are the same, the certainty factor is 10
0%, 80% if the types are different, 50 if there are two utility pole symbols assigned to the utility pole identification code
%, The confidence level is determined to be 33% if there are three.
Then, the recognized utility pole coordinates (coordinates of the center position of the assigned utility pole symbol), the certainty factor, and the utility pole identification code are recorded in the hard disk of the hard disk device 12, and the process ends.

Next, the recognition result confirmation / correction processing in FIG. 7 will be described with reference to the flowchart in FIG.
When this process is started, first, in step 1, the recognition result by the above-described utility pole recognition process is read. Then, in Step 2, the utility pole symbols to which the utility pole identification code is assigned are rearranged in the order of low reliability of recognition, and if they have the same reliability, they are rearranged in order of utility pole identification code. It is determined whether or not it is a specific value (for example, 50%) or more.

If the certainty factor is equal to or higher than the specific value, the process proceeds to step 4, where an image image of a small area centering on the telephone pole symbol, a circle of the telephone pole symbol as a recognition result, and a telephone pole identification code are shown in FIGS. Additional display is made to the list display on the screen of the display 2 shown in 3, and the process returns to step 3.

However, since the degree of certainty is low at the beginning,
In step 3, it is determined that the value is less than the specific value, and the process proceeds to step 5, where the image of a small area centering on the telephone pole symbol, the circle of the telephone pole symbol which is the recognition result and the telephone pole identification code are listed on the screen of the display 2. Additional highlighting is performed on the display and the process returns to step 3. However, when a plurality of telephone pole identification codes are assigned to one telephone pole symbol, the telephone pole identification codes are not displayed.

As a method of highlighting, in this embodiment, the background of the image of the small area of the telephone pole whose recognition certainty factor is a specific value or more is displayed in white, while the certainty factor of the recognition is less than the specific value. The background of the image of the small area of the telephone pole is colored pink to urge the operator to confirm it. In this way, the background color is made different or the display brightness of the background is made different so that the display of the telephone pole with a low degree of certainty of recognition is conspicuous. In this embodiment, the recognition certainty factor is classified into two levels, but it is also possible to distinguish the recognition certainty factor into three or more levels so that the background color or the display brightness is made different so that the recognition reliability is lower.

FIG. 13 shows an example of the list display. From the leftmost column to the 6th column, the certainty factor of recognition is less than or equal to a specific value.
Although the background color is displayed in pink, it is shown with halftone dots in the figure. From the leftmost column to the 4th column of the uppermost column, a plurality of telephone pole identification codes are assigned to one telephone pole symbol, so the telephone pole identification code is not displayed. From the fifth column, since the utility pole symbol and the utility pole identification code are assigned one to one, the circle of the utility pole symbol and the utility pole identification code are overlaid on the image image in different colors (for example, the image image is gray and the utility pole symbol is The circle and its utility pole identification code are displayed in dark blue).

When the display of all recognition results is completed, the recognition results can be confirmed and corrected. That is, FIG.
If it is determined in step 6 that the recognition result display is completed, it is determined in step 7 whether or not the recognition result display is completed. This is because when the "end" button displayed at the right end of the upper part of FIG. 13 is clicked by pointing 21 with the mouse cursor of the mouse 5, it is judged that the process is finished and the confirmation correction result is displayed on the hard disk device 12 The data is recorded in the hard disk of and the process is completed.

If it is not finished, the process proceeds to step 9, and it is judged whether or not the edit portion, that is, any of the displayed columns (small windows) is designated by the mouse 5 or the keyboard 4, and if not designated, the step is performed. Returning to 7, but when instructed, the operation proceeds to step 10 and a certain area (predetermined area) centered on the recognized telephone pole coordinates in the instructed column.
The image of the equipment drawing of is displayed in a new window by opening a new window. Then, in step 11, the circle of the utility pole symbol is displayed in the center of the new window, and the utility pole identification code is displayed somewhere in the window.

FIG. 14 is a display example of the new window, and is an example when the fifth column from the left of the uppermost column in FIG. 13 is designated. Although not clearly shown in this figure, the circle 24 of the recognition result is displayed in dark blue on the image of the telephone pole symbol in the center of the new window 23, and the recognized telephone pole identification code (in this area) is displayed in the area 25 adjacent to the left side. In the example, “A43”) is displayed. This new window is actually displayed by partially overlapping the list display shown in FIG.

Then, the operator checks the telephone pole identification code (A43) of this image and the telephone pole identification code (A43) of the recognition result, and if they are the same, the recognition result is correct, so the "setting" button 26 is instructed. By doing so, the recognition result is confirmed. If they are different, by specifying the "erroneous recognition" button 27 or the "unrecognized" button 28, it is recorded as an incorrect recognition or unrecognized telephone pole,
In this embodiment, it is entrusted to an unrecognized utility pole placement process later.

However, if they do not match, the operator can read the telephone pole identification code (electric pole number) of the image and input it from the keyboard 4 so that the recognition result can be corrected. When the recognition result is set in this way, it is determined in step 12 of FIG. 12 that there is a correction change by a human, the integrity of the utility pole is verified in step 13, and the result is reflected in the list display. The new window is deleted at 14 and the process returns to step 7.

As an example of reflecting the utility pole consistency verification result in the list display, when the "set" button 26 is instructed in the new window shown in FIG. 14 to confirm the utility pole identification code A43, the list of FIG. 13 is displayed. Since it was found that the telephone pole identification code A43 for the image displayed in the sixth column from the left of the top line of the display was a misrecognition, the display in that column was deleted from the list display as shown in FIG. Since the confidence in the column is 100%, the highlighting is stopped and the background color is changed to white.

When the new window is opened but nothing is done, the "cancel" button 29 in FIG. 14 is instructed, and it is determined in step 12 in FIG. 12 that there is no human modification and the new window is deleted as it is. Then, the process returns to step 7.

When the highlighted column in which the utility pole identification code is not displayed in the list display of FIG. 13, for example, the leftmost column of the uppermost column is designated, a new window 23 opens as shown in FIG. An image image of a predetermined area and a utility pole symbol circle 24 are displayed, and a plurality of recognized utility pole identification codes (in this example, "B61" and "C50") are displayed in an area 25 adjacent to the left side thereof. .

Therefore, the operator confirms the telephone pole identification code based on the image in the new window 23, determines that "C50" is correct, and determines "C" in the area 25.
When "50" is selected and designated by the mouse 5 or the like, "C50" is confirmed as the telephone pole identification code of this telephone pole symbol, and "B61" is deleted.

In this way, the recognition result of each column of the list display is displayed in a window from the one with a low degree of certainty of recognition and compared with the image image to be checked and confirmed, or there are a plurality of recognition results. In that case, the correct one can be selected and confirmed. That is, the processes for erroneous recognition and unconfirmation are completed without omission if only the items displayed in the list are completed. When the "end" button 21 shown in FIG. 13 or 15 is instructed, it is determined that the process ends in step 7 of FIG. 12, and the confirmation correction result is recorded in the hard disk of the hard disk device 12 in step 8 and the process ends. .

Next, the unrecognized utility pole arrangement and utility pole symbol / electric wire display processing of FIG. 7 will be described with reference to the flowchart of FIG. When this process is started, first, in step 21, the recognition telephone pole confirmation / correction result by the recognition result confirmation / correction process described above is read, and in step 22, the image data read and recorded from the distribution facility drawing is displayed on the screen of the display 2.

Then, in step 23, a telephone pole symbol (only circle) is drawn on the image data. At this time, if the circle of the telephone pole symbol is drawn with a higher density than the image data or with a different color, the display becomes easier to see. Furthermore, in step 24, a list of unrecognized telephone pole identification codes is displayed. The display example is shown in FIG. The unrecognized utility pole identification code is present in the equipment information read from the power distribution equipment master, but the corresponding utility pole symbol could not be assigned, but it was erroneously recognized or unrecognized by the recognition result confirmation and correction means described above. This is the utility pole identification code.

In a display area 30 in FIG. 18, image data such as a utility pole symbol and its identification code (with parentheses) read from a distribution facility drawing, an electric wire, a distance between utility poles (with parentheses), and a circle of the recognized utility pole symbol are shown. And its utility pole identification code (without parentheses) are overlaid. It should be noted that the telephone pole identification code as a recognition result is displayed at a fixed position with respect to the circle of each telephone pole symbol, but is displayed at a position with a margin for easy viewing.

A list of unrecognized telephone pole identification codes (B51, C53, A28, ..., J) is displayed in the vertically long display area 31 on the left side.
37) is displayed. Although not shown for convenience of illustration, an “end” button and a “cancel” button are also displayed on the screen of the display.

Then, it is determined in step 25 in FIG. 17 whether or not the operation is completed. If the "end" button is instructed, it is determined that the operation is completed, and the process proceeds to step 26. After recording each utility pole coordinate, in step 27. The utility pole identification code remaining in the list is recorded in the hard disk of the hard disk device 12 as a mismatch between the drawing and the power distribution equipment master, and the process ends.

If the "end" button is not instructed, it is determined in step 25 that the process will not end, and the process proceeds to step 28.
It is determined whether the telephone pole identification code on the list has been designated with a mouse or the like. Therefore, when one of the unrecognized telephone pole identification codes displayed in the display area 31 is designated by the operator with a mouse or the like, the process proceeds to step 29 and the image data of the area where the telephone pole of the telephone pole identification code should exist is displayed. Then, in step 30, the telephone pole identification code is deleted from the list display.

For example, when the telephone pole identification code B51 at the top of the list of unrecognized telephone pole identification codes displayed in the display area 31 of FIG. 18 is designated by a mouse or the like, the telephone pole should exist as shown in FIG. The image data of the area is displayed in a window in the display area 30, and the utility pole identification code B
51 is deleted from the list display.

After that, the system waits at step 32 for the manual placement of the electric pole, and it is judged at step 33 whether or not the utility pole can be placed. If it cannot be placed (when the "cancel" button is instructed), the list display The utility pole identification code previously deleted is added again to, and the process returns to step 25. If it is determined in step 33 that the power pole has been placed, the coordinates of the placed power pole are stored and the process proceeds to step 36.

For example, the utility pole identification code B51 is included in the image data displayed in the window as shown in FIG.
When the same number is found, and the telephone pole symbol is pointed and clicked with the mouse cursor 32, the telephone pole symbol is recognized, the center position coordinates thereof are acquired, and the telephone pole identification code B51 is provided in the contour circle of the telephone pole symbol and in the vicinity thereof. It is displayed in a color different from other parts, for example, red.

In step 36 of FIG. 17, it is judged whether or not the distance between the electric pole symbols recognized from the drawing and the distance between the electric poles obtained from the power distribution equipment master match, and if they match, a normal display (for example, Display the electric wire between the pole symbols with (blue line). Highlight if they do not match (eg red line)
To display electric wires between the pole symbols. These wires will be displayed overlaid on the image of the distribution facility drawing.

FIG. 20 shows an example of the display. Since color display is not possible, all electric wires are shown by black lines. However, in this example, the electric wire indicated by the thick line 33 is actually displayed in red. The electric wire may be highlighted in another color, or by increasing the display brightness or making it blink. In this state, if the electric pole symbol of G31 is designated by the mouse cursor with the mouse 5 and clicked, the electric pole symbol of G31 can be moved by moving the mouse 5.

That is, it is judged whether the telephone pole symbol drawn in step 31 of FIG. 17 is designated by a mouse or the like, and when it is designated, the rearrangement by human is waited, and if the arrangement is possible, the coordinate of the arranged telephone pole is stored, The electric wire display process of steps 36 to 38 is performed again. For example, when the electric pole symbol G31 is moved to the position of the electric pole symbol imaged as (G31) in the display of FIG. 20, the electric pole symbol and G24 are displayed. And the distance between G38 and G38 match the distance obtained from the equipment master, and the electric wire between them becomes the normal display (blue line).

In this processing, there is a possibility of erroneous recognition when the electric wire network does not match the background drawing.
The user recognizes the utility pole on the screen, and if there is an error, the location of the utility pole symbol can be moved and corrected on the screen.

In this way, the unrecognized telephone pole identification codes displayed in the list are sequentially designated, and the telephone pole symbol is specified from the image image of the region in which the telephone pole should exist.
Alternatively, by further moving and arranging the position of the telephone pole symbol, the position coordinates can be given to all the telephone pole identification codes. That is, the arrangement process for the unrecognized utility poles is completed without omission if only the unrecognized utility pole identification codes displayed in the list are completed.

Here, an experimental result of automatic pole recognition according to the present invention will be shown. The drawing to be tested is a scale of 1/1000, A
There are 14 two-size drawings (total number of utility poles: about 1300, total number of branch lines: about 700, total number of posts: about 30), and these consist of two sets of 6 and 8 sheets with continuous areas. Here, the 6-sheet set is called the A set, and the 8-sheet set is called the B set. Table 1 shows the equipment description status per drawing.

[0089]

[Table 1]

The outline of the terrain of each group is that most of the group A is an urban area and most of the group B is a suburb. In addition, the description situation was not good because there were not a few blurs and intersections of line segments and symbols. Table 2 shows the results of the experiment of automatic recognition of telephone pole symbols (automatic extraction of symbols and automatic assignment of telephone pole identification codes).

[0091]

[Table 2]

Here, the recognition rate (%) means the ratio of the telephone pole symbols to which the telephone pole symbols have been successfully extracted and the correct telephone pole identification code has been added to the total number of telephone poles. False recognition (%) is the percentage of the total number of utility poles in which the utility pole symbol was extracted but the incorrect utility pole identification code was added, and the incorrect symbol near the correct utility pole symbol was extracted. Say. Unrecognized (%) means the ratio of the number of utility poles that could not be extracted to the total number of utility poles.

Since the drawing situation is not good such as a large number of blurs in the drawing, the unrecognized occurrence rate is high and the recognition rate is about 8
It was 0%. The result of this automatic recognition is not high compared to other general automatic recognition systems. In the symbol extraction algorithm, if the amount of image features to be detected is increased, the recognition rate is surely improved, but there are problems such as high cost and long processing time.

In the case of the system of the present invention, the required correction time after this automatic recognition is only about 5 to 10 minutes per drawing, which is significantly larger than the required correction time in other general automatic recognition systems. Short. Therefore, the total cost required for input is quite low as a whole, which is extremely useful in practice.

The features of the telephone pole automatic recognition system according to the present invention are summarized as follows. (1) Since the handwritten original drawing that has been used in the field up to now can be automatically input as it is, there is no need for re-trace or the cost for it. (2) The utility pole identification code can be automatically assigned to the utility pole symbol of most utility poles by using the relationship between the utility pole identification code and the drawing mesh and the distance information between the connected utility poles obtained from the distribution equipment master. (3) With the excellent correction interface, mistakes and oversights in automatic recognition can be corrected reliably in a short time.

Due to these characteristics, it is possible to input accurately at an extremely low cost, and Table 3 shows a comparison between various conventional inputs and inferiority.

[0097]

[Table 3]

In the above-mentioned embodiment, an example of where the utility pole identification code (power pole number) is located in the mesh-shaped division area on the distribution facility drawing, that is, the location information is shown. , It is not indispensable for adopting the utility pole automatic recognition system according to the present invention, and the utility pole identification code is automatically added to the utility pole symbol only from the information of the mutual connection of utility poles and the distance between the utility poles from the distribution equipment master. It is possible to allocate.

Further, the present invention is intended not only for accurately inputting the positional information of the electric pole from not only the electric power distribution equipment drawing, but also various kinds of aerial equipment drawings using the electric pole such as a communication equipment drawing such as a telephone. Of course, it can be applied.

[0100]

As described above, according to the present invention, automatic utility pole recognition from various equipment drawings having utility poles can be performed at low cost and relatively accurately, and the recognition result can be easily confirmed. Then, if there is an erroneous recognition or an unrecognized telephone pole, the correction or addition can be easily performed in a short time. Therefore, it becomes possible to efficiently and quickly perform the work of inputting the position coordinates of each power pole from a large number of distribution facility drawings into the database at a low cost.

[Brief description of drawings]

FIG. 1 is a block diagram showing a functional configuration of an automatic utility pole recognition system from facility drawings according to the present invention.

FIG. 2 is a system configuration diagram of an embodiment of the present invention.

FIG. 3 is a block diagram showing an example of the same hardware configuration.

FIG. 4 is a diagram showing an example of a distribution facility drawing to be recognized in this embodiment.

FIG. 5 is an explanatory view for explaining an outline of a utility pole recognition process based on a power distribution equipment drawing and information of a power distribution equipment master according to this embodiment.

FIG. 6 is an explanatory diagram showing the same according to a processing procedure.

FIG. 7 is a main flowchart of a utility pole automatic recognition process by the utility pole automatic recognition system shown in FIGS. 2 and 3;

8 is a flowchart showing the contents of a telephone pole symbol extraction process in FIG.

9 is a diagram for explaining a telephone pole symbol extraction process in FIG. 8. FIG.

10 is a flowchart showing the contents of a telephone pole recognition process in FIG.

11 is an explanatory diagram of a utility pole recognition process using a utility pole identification code in FIG.

12 is a flowchart showing the contents of recognition result confirmation / correction processing in FIG.

13 is a diagram showing an example of a recognition result list display in the recognition result confirmation / correction processing of FIG.

FIG. 14 is a diagram showing a display example of a new window when a certain column in the list display of FIG. 13 is designated.

FIG. 15 is a diagram showing an example of a list display in which the results of the integrity verification of telephone poles are reflected.

16 is a diagram showing a display example of a new window when the first column (highlighted column in which only the image image is displayed without the telephone pole identification code) in the list display shown in FIG. 13 is designated.

FIG. 17 is a flowchart showing the contents of unrecognized utility pole placement and utility pole symbol / electric wire display processing in FIG. 7.

18 is a diagram showing a window display example by the processing of steps 21 to 24 of FIG.

19 is a diagram showing a window display example when an unrecognized telephone pole identification code B51 of FIG. 18 is designated.

FIG. 20 is a diagram showing a display example in which a telephone pole symbol and an electric wire are superimposed and displayed on an image image.

[Explanation of symbols]

 1: Device Main Body 2: Display 3: Scanner 4: Keyboard 5: Mouse 6: Communication Device 7: Power Distribution Equipment Drawing 8: Power Distribution Equipment Master 10: CPU (Central Processing Unit) 11: Memory (ROM, RAM) 12: Hard Disk Device (HDD) 13: System bus

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification number Internal reference number FI Technical display location G06T 7/60 9365-5H G06F 15/62 322 M 9365-5H 335 9061-5H 15/70 350 B (72) Minoru Tanaka, 3-7-1, Ichibancho, Aoba-ku, Sendai-shi, Miyagi Prefecture Tohoku Electric Power Co., Inc. (72) Hirofumi Iba 3-7-1, Ichibancho, Aoba-ku, Sendai, Miyagi Electric power company

Claims (5)

[Claims] 1. An image reading means for reading, as image data, an image of a facility drawing including a utility pole symbol such as a utility pole, a branch line, a support pole, and an overhead line corresponding to an actual position on a map, and a utility pole identification code. From the equipment master in which the equipment number including the drawing number of the equipment drawing, the utility pole identification code of each utility pole existing on the equipment drawing, the connection relationship between the utility poles, and the distance to the adjacent utility pole is stored, Equipment information reading means for reading equipment information corresponding to the equipment drawing read by the reading means; utility pole symbol extracting means for image-processing the image data read by the image reading means to extract utility pole symbols together with their position information; For each utility pole symbol extracted by the means, the position of each utility pole is confirmed by referring to the equipment information read by the equipment information reading means. Utility pole recognizing means for allocating a utility pole identification code, and among the utility pole symbols extracted by the utility pole symbol extracting means, the utility pole symbol to which the utility pole identification code has been assigned by the utility pole identifying means is recognized by the utility pole recognizing means. An image is displayed in order from the lowest confidence level, together with the assigned utility pole identification code, and when any of the displayed columns is instructed by the instruction means, the equipment in the predetermined area including the utility pole symbol in that column is displayed. An automatic utility pole recognition system from a facility drawing, which is provided with a recognition result confirmation / correction means for displaying an image image of a drawing in a window and enabling selection, correction or confirmation of a utility pole identification code for the utility pole symbol. 2. The automatic utility pole recognition system from a facility drawing according to claim 1, wherein the recognition result confirmation and correction means comprises:
When displaying a list of telephone pole symbols to which the telephone pole identification code is assigned in the order of low certainty degree of recognition by the electric pole recognizing means, the telephone pole symbol having low certainty degree of recognition is a high electric pole symbol of recognition. An automatic utility pole recognition system from equipment drawings, characterized by having a means for highlighting by making different background colors or different brightness. 3. The utility pole automatic recognition system from equipment drawings according to claim 1 or 2, wherein the utility pole recognizing means selects the utility pole symbol from among the utility pole identification codes in the equipment information read by the equipment information reading means. While displaying a list of utility pole identification codes that could not be assigned to the utility pole symbol extracted by the extraction means, and when any of the displayed utility pole identification codes is instructed by the instruction means, the utility pole of the utility pole identification code is displayed. An image image of a predetermined area on the equipment drawing that should exist should be displayed in a window, and when the position of the electric pole on the image image is designated, the electric pole symbol is arranged at the position of the electric pole and the electric pole symbol is displayed. An unrecognized utility pole arranging means for allocating the instructed utility pole identification code is provided. Automatic pillar recognition system. 4. The utility pole automatic recognition system from the facility drawing according to claim 3, wherein each utility pole symbol whose assigned utility pole identification code has been assigned and whose utility pole position has been determined, together with a connecting line corresponding to an overhead line between the utility poles. A system for automatically recognizing utility poles from equipment drawings, further comprising: utility pole symbol / connection line display means for displaying the image data of the equipment drawings read by the image reading means in an overlapping manner. 5. The automatic utility pole recognition system from the equipment drawing according to claim 4, wherein when the utility line symbol / connection line display means displays a connection line between the utility pole symbols, the connection relationship and connection between the utility poles. If the distance to the utility pole does not match the connection relationship between the utility poles and the distance to the utility pole to be connected according to the equipment information read from the equipment master by the equipment information reading means, the connection line to another connection line A system for automatically recognizing utility poles from equipment drawings, which is provided with means for highlighting by different colors or different brightness, and means for moving the position of the displayed utility pole symbol according to an instruction from the instruction means. .