JP6936828B2 - Construction drawing creation support system - Google Patents

Description

The present invention relates to a construction drawing creation support system for creating a drawing showing a state of laying of a buried object buried in the ground by civil engineering work.

When the work to pipe buried objects buried in the ground by civil engineering work, such as gas pipes, is carried out, a report is made every day or every week, for example, in order for the workers at the construction site to record the work contents. , Construction daily report) is created. In the daily construction report, the laying condition of the gas pipe constructed in the construction on the day is drawn and recorded. In order to draw the laying state of the gas pipe, it is necessary to measure the laying state of the gas pipe (for example, the laying distance of the gas pipe), and currently the scale is after the arrangement of the gas pipe and before the embedding. It is common to perform hand measurement using a device such as, etc., and draw a drawing based on the result of hand measurement.
However, since the work of performing manual measurement takes time and effort, the burden of creating a daily construction report is heavy for the workers at the site. In order to reduce the labor and time required for manual measurement, electromagnetic waves are radiated into the ground, reflected waves from buried objects are received, and based on the intensity of the reflected waves, as disclosed in Patent Document 1. It is conceivable to use a three-dimensional voxel data display device capable of detecting the position of a buried object in the ground.

Japanese Unexamined Patent Publication No. 2000-22166

However, the above-mentioned prior art has the following problems.
The three-dimensional voxel data display device disclosed in Patent Document 1 is used after embedding a buried object such as a gas pipe in the ground. The nature of the soil is often non-uniform and the intensity of electromagnetic waves varies, which may make it impossible to detect the exact location of the buried object. Moreover, after embedding in the ground, it is not possible to confirm whether the detection result is correct.
Therefore, it is desirable to measure before embedding the buried object. As a method of efficiently recording the laying state of the buried object before embedding, it is conceivable to convert the laying state of the gas pipe into three-dimensional data by laser scanning and record it, but the problem is that the device is very expensive. Become. That is, if 100 works are carried out per day, 100 laser scanning devices must be prepared in order to record the laying state at each site, which is realistic because the cost is enormous. Not. Therefore, at present, it is common to take a manual measurement method using a scale or the like before embedding the buried object, and it is difficult for the operator to efficiently record the laid state of the buried object. There is a problem that the burden of creating a daily construction report is heavy.

The present invention is for solving the above problems, and provides a system capable of efficiently recording the laying state before embedding a buried object and reducing the burden of creating a daily construction report for workers at the site. With the goal.

In order to solve the above problems, the construction drawing creation support system of the present invention has the following configuration.
(1) In a construction drawing creation support system that creates a drawing showing the laying state of a buried object buried in the ground by civil engineering work, after the buried object is placed in the ground and before being embedded. The drawing is created using at least an imaging device that captures an image of a buried object, an image determination unit that determines whether or not the image meets a predetermined standard, and an image that is determined by the image determination unit to satisfy a predetermined standard. It is characterized in that the drawing generation unit is provided, and the predetermined standard is the image quality of the image .

(2) In the construction drawing creation support system that creates a drawing showing the laying state of the buried object buried in the ground by the civil engineering work, after the buried object is placed in the ground and before the embedding. A drawing is created using at least a photographing device that captures an image of a buried object, an image determination unit that determines whether or not the image meets a predetermined standard, and an image that is determined by the image determination unit to meet a predetermined standard. It is characterized by including a drawing generation unit, and the drawing includes at least a three-dimensional drawing.
(3) In the construction drawing creation support system according to (1) or (2), the drawing includes at least an ortho image.

(4) In the construction drawing creation support system according to any one of (1) to (3), the image determination unit is based on the shooting environment in which the image is taken by the shooting device, and the image is the construction drawing creation support system. It is characterized in that it is determined whether or not it can be used in, and when it is determined that it can be used, it is determined whether or not it meets a predetermined standard.

(5) In the construction drawing creation support system according to any one of (1) to (4), the buried object has a sign at a predetermined position on the surface, and the photographing device is a buried object containing the sign. Taking an image, the image determination unit determines whether or not the image satisfies a predetermined criterion, at least based on the sign of the image.

(6) In the construction drawing creation support system that creates a drawing showing the laying state of the buried object buried in the ground by the civil engineering work, after the buried object is placed in the ground and before the embedding. A drawing is created using at least a photographing device that captures an image of a buried object, an image determination unit that determines whether or not the image meets a predetermined standard, and an image that is determined by the image determination unit to meet a predetermined standard. A drawing generation unit is provided, the buried object has a mark at a predetermined position on the surface, the photographing device captures an image of the buried object including the mark, and the image determination unit has a predetermined image. Whether or not the criteria are met is judged by at least the signatures shown in the image , the signatures include at least information on the shape and size of the buried object, and the drawing generator creates a drawing containing the information contained in the signatures. It is characterized by doing.
(7) In the construction drawing creation support system according to (6), the sign is a two-dimensional arrangement of a plurality of cells having a predetermined color, and is used to detect the position of the sign area. It is characterized in that it has a notch and represents information on the buried object by a combination of colors.

(8) The construction drawing creation support system according to any one of (5) to (7) is provided with a position information acquisition unit for acquiring the position information of the sign, and the drawing generation unit is acquired by the position information acquisition unit. It is characterized in that a drawing holding the obtained position information is created.

(9) In the construction drawing creation support system described in (8), the position information acquisition unit is a relative coordinate calculation unit that calculates the relative coordinates of the signature with respect to a predetermined reference position based on the image taken by the photographing device. The feature is that the position information includes at least relative coordinates.

(10) In the construction drawing creation support system described in (8), the position information acquisition unit comprises a positioning device that acquires the absolute coordinates of the signature after the buried object is placed in the ground and before the embedding. That is, the position information includes at least absolute coordinates.

(11) In the construction drawing creation support system described in (8), the position information acquisition unit is a relative coordinate calculation unit that calculates the relative coordinates of the signature with respect to a predetermined reference position based on the image taken by the photographing device. It consists of a positioning device that acquires the absolute coordinates of the signature after it is placed in the ground and before it is embedded, and the position information includes relative coordinates and absolute coordinates. It is characterized by.

(12) In the construction drawing creation support system according to any one of (1) to (11), the image determination unit uses the construction drawing creation support system to determine whether or not the predetermined criteria are satisfied. It is characterized by notifying a person and, when it is determined that the predetermined criteria are not met, notifying the person and proposing a method for satisfying the predetermined criteria.

The construction drawing creation support system of the present invention has the following actions and effects by having the above configuration.
According to the construction drawing creation support system described in (1), it is possible to efficiently record the laying state before embedding the buried object, and it is possible to reduce the burden of creating the daily construction report of the workers at the site.
That is, first, the worker at the site takes an image of the buried object at least after the buried object is placed in the ground by the photographing device and before the embedding. Then, the image determination unit determines whether or not the image satisfies the predetermined criteria, and the drawing generation unit creates a drawing using the image determined by the image determination unit to satisfy the predetermined criteria. Since the on-site worker can create a daily construction report using the drawing, there is no need to spend time and effort for manual measurement to make a drawing of the laid state of the buried object as in the past. It is possible to record the laying state of objects, and it is possible to reduce the burden of creating daily construction reports for workers at the site.
The predetermined criteria are, for example, sharpness, brightness, ISO value, position of a subject in an image, lap ratio between images, and the like.

According to the construction drawing creation support system described in (2), since the drawings generated by the drawing generation unit include at least three-dimensional drawings, laying of buried objects without using an expensive device such as a laser scan. The state can be recorded as a three-dimensional drawing.
According to the construction drawing creation support system described in (3), at least an ortho image is included in the drawing generated by the drawing generation unit.
Since the image taken by the photographing device is a central projection, the image on the image is distorted due to the difference in the distance from the center of the lens of the photographing device to the object to be photographed. An image obtained by converting such a central projection image into an orthographic projection and correcting distortion is an orthophoto image. By generating the distortion-corrected ortho image, it becomes possible to accurately measure the position of the buried object on the ortho image. If it becomes possible to accurately measure the position of buried objects on the ortho image, the workers at the site can save the trouble of conducting a survey to create a daily construction report, and create a daily construction report. The burden is reduced.

According to the construction drawing creation support system described in (4), first, based on the shooting environment, it is determined whether or not the image taken by the shooting device can be used in the construction drawing creation support system, and then based on a predetermined standard. Judge the digital image. If it is determined that the image is not available based on the shooting environment, it is not necessary to determine whether or not the predetermined criteria are satisfied thereafter, so that the waste of the determination process can be eliminated.

According to the construction drawing creation support system described in (5), it becomes easy for the image determination unit to determine whether or not the predetermined criteria are satisfied, and the construction drawing creation support system can create drawings more smoothly. .. For example, if it is determined whether or not the sharpness of an image is appropriate as a predetermined criterion, it depends on how much the image of the sign itself is blurred or how much the boundary between the sign and the buried object is blurred. The sharpness can be judged. In addition, the roughness of the mark on the image determines whether the roughness of the image reaches the standard, and the position of the mark on the image indicates whether the buried object is in an appropriate position on the image. It is possible to judge.

According to the construction drawing creation support system described in (6), the burden of creating a daily construction report for workers at the site is reduced.
Since information such as the shape and size of the buried object is generally written in the daily construction report, the operator makes a note of the information such as the shape and size of the buried object during the work and makes a note of the memo. Information on buried objects is written in the daily construction report based on the above. Such work is complicated and may cause a description error, so that it is difficult to guarantee accurate information entry. Therefore, if the information of the buried object is included in the sign provided for the buried object and a drawing is created in which the information contained in the sign is retained, the on-site worker will bother to check the shape, size, etc. It eliminates the need for complicated work and reduces the burden of creating daily construction reports for on-site workers.

According to the construction drawing creation support system described in (7), the sign is a two-dimensional arrangement of a plurality of cells having a predetermined color, and represents information on the buried object by a combination of colors. Therefore, the information of the buried object (shape, size, etc. of the buried object) can be read by detecting the combination of the colors of the signatures reflected in the image captured by the photographing device. In addition, since it is equipped with a notch for detecting the position of the area of the signature, even if the signature in the image captured by the photographing device is tilted, the top, bottom, left, and right of the signature can be discriminated accurately. It is possible to read the information of the buried object that the image has.

According to the construction drawing creation support system described in (8), the position information is acquired by the position of the sign including the information on the shape and size of the buried object, and the drawing holding the position information is created. Therefore, it becomes easy to manage what kind of buried object is laid and where, and the burden of creating a daily construction report for workers at the site is reduced.

According to the construction drawing creation support system described in (9), it is possible to generate a drawing showing the laying state based on the relative coordinates. For example, when a gas pipe buried by civil engineering work is to be replaced in the future, if there is a drawing generated based on relative coordinates, the gas can be measured from a predetermined reference position on a scale or the like. It is possible to specify the position of the pipe.

According to the construction drawing creation support system described in (10), the absolute coordinates are acquired from the position of the sign including the information on the shape and size of the buried object, and the drawing holding the information on the absolute coordinates is created. , It becomes easy to manage what kind of buried object is buried where. For example, when a gas pipe buried by civil engineering work is to be replaced in the future, if there is a drawing generated based on absolute coordinates, the position of the gas pipe should be specified by using GPS equipment. Is possible. At present, since GPS devices are expensive, it is common to specify the position of a gas pipe based on relative coordinates by a scale or the like. However, with the spread of GPS devices in the future, the present invention Increased usefulness.

According to the construction drawing creation support system described in (11), it is possible to generate a drawing showing the laying state based on relative coordinates and absolute coordinates. For example, when a gas pipe buried by civil engineering work is to be replaced in the future, if there is a drawing generated based on relative coordinates and absolute coordinates, measurement is performed from a predetermined reference position on a scale or the like. Alternatively, the position of the gas pipe can be specified by using a GPS device. GPS devices are expensive, and it is possible that multiple GPS devices cannot be prepared. Then, if construction is to be carried out at multiple locations at the same time, there are sites where GPS equipment cannot be used. In such a case, if the gas pipe position can be specified by both the relative coordinates and the absolute coordinates, it can be flexibly dealt with.

According to the construction drawing creation support system described in (12), the user of the construction drawing creation support system (for example, a worker at a construction site) determines whether or not the image performed by the image determination unit meets a predetermined standard. In addition to being able to know the results of the above, if it is determined that the prescribed criteria are not met, a proposal for a method for satisfying the prescribed criteria can be received. The method for satisfying a predetermined standard relates to a method of shooting with a shooting device such as adjustment of a shutter speed.

It is a block diagram which shows an example of the structure of the construction drawing creation support system. It is a figure which shows an example of the state of taking a picture of a gas tube using a picture taking device. It is a figure which shows an example of the laying state of a gas pipe and a joint. (A) is a diagram showing an example of a two-dimensional code, and (b) is a diagram showing an example of a cell color and a number corresponding to the color. It is a list which shows the color combination of the cell of a 2D code. It is a list which shows the color combination of the cell of a 2D code. It is a list which shows the color combination of the cell of a 2D code. It is a list which shows the color combination of the cell of a 2D code. It is a figure which shows an example of the recognition method when the cell of a 2D code is integrated in relation to image processing. (A) is a diagram showing a case where a part of the bottom part of the two-dimensional code is missing and is reflected in a digital image, and (b) is a digital image in which a part of the corner and the bottom part of the two-dimensional code is missing. It is a figure which shows an example of the case where it appears in an image, and (c), (d), (e) show the case where a part of the lateral end of a two-dimensional code is missing and is reflected in a digital image. It is a figure. It is a correspondence table of the sequence represented by the two-dimensional code and the gas pipe information. It is a figure which shows an example of the determination standard of the illuminance difference. It is a figure which shows an example of the determination standard of a flash guide number. It is a figure which shows an example of the determination criterion of a shutter speed. It is a figure which shows an example of the determination standard of an ISO value. It is a figure which shows an example of the determination standard of brightness. (A), (b), and (c) are diagrams showing an example of a criterion for determining sharpness. It is a figure which shows an example of the determination method of a lap ratio. (A), (b), (c), and (d) are diagrams showing an example of a method for determining the position of a subject. It is a figure which shows the flow of the determination process of an image determination unit. It is an image diagram of an ortho image. It is a figure which shows an example of the method of calculating a relative coordinate by an ortho image. It is an image diagram of 3D point cloud data. (A) is an image diagram of meshing, (b) is an image diagram of polygon data, and (c) is an image diagram of a state in which a digital image is attached to the polygon data. It is an image diagram of a three-dimensional CAD drawing. It is a figure which shows the modification of a 2D code. It is a figure which shows the modification of a 2D code. It is a figure which shows the modification of a 2D code. It is a figure which shows the modification of a 2D code. It is a figure which shows the modification of a 2D code. It is a figure which shows the modification of a 2D code. It is a figure which shows the modification of a 2D code. It is a figure which shows the modification of a 2D code. It is a figure which shows the modification of a 2D code. It is a figure which shows the modification of a 2D code. It is a figure which shows the modification of a 2D code. It is a figure which shows the modification of a 2D code. It is a figure which shows the modification of a 2D code. It is a figure which shows the modification of a 2D code. It is a block diagram which shows the modification of the structure of the construction drawing creation support system. It is a block diagram which shows the modification of the structure of the construction drawing creation support system.

An embodiment of the construction drawing creation support system 1 of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a block diagram showing an example of the configuration of the construction drawing creation support system 1 of the present embodiment.
The photographing device 11, the positioning device 12, and the communication terminal 18 are connected to the construction drawing creation support system 1 via a communication line 19 such as the Internet.

The photographing device 11 is a digital camera in which a worker at a construction site photographs a gas pipe 20 or a joint 21 as a buried object in order to acquire a digital image for creating a drawing described later. As shown in FIG. 2, the handle 11a is connected to the photographing device 11, and the worker at the construction site is standing on the ground 30 and the gas pipe is arranged in the installation groove 30a dug up by the civil engineering work. 20 can be photographed from the sky. The photographing is performed after the gas pipe 20 and the joint 21 are arranged in the installation groove 30a and before the embedding, and about 200 digital images are photographed in one day's construction. In the present embodiment, the operator himself / herself uses the photographing device 11 to take a picture, but the taking picture device 11 may be mounted on a remote-controlled unmanned aerial vehicle such as a drone to take a picture from the sky. .. Further, the operator may hold the photographing device 11 in his / her hand to perform photographing. In this case, the shooting position is lower than when the handle 11a or the drone is used, and the shooting range is narrowed, so that the number of shots is larger than when the handle 11a or the drone is used.

A two-dimensional code 40 as a code is attached to the surface of the gas pipe 20 and the joint 21 arranged in the installation groove 30a (see FIG. 3), and the photographing device 11 is included in the gas pipe 20 and the joint 21. The two-dimensional code 40 is also photographed.
The two-dimensional code 40 includes information such as the shape and size of the gas pipe 20 and the joint 21 (hereinafter referred to as gas pipe information), and the processing unit 16 described later recognizes the two-dimensional code 40 reflected in the digital image. By doing so, it is possible to determine information such as the shape and size of the gas pipe 20 and the joint 21 captured in the digital image. The details of the two-dimensional code 40 will be described later.

The positioning device 12 is an absolute two-dimensional code 40 affixed to the gas pipe 20 and the joint 21 after the worker at the construction site has arranged the gas pipe 20 and the joint 21 in the installation groove 30a and before embedding the gas pipe 20 and the joint 21. It acquires the coordinates. The position information acquired by the positioning device 12 is included as the position information of the buried object in the drawings described later.

The photographing device 11 transmits the digital image taken through the communication line 19 to the construction drawing creation support system 1, and the positioning device 12 transmits the information on the absolute coordinates acquired via the communication line 19 to the construction drawing creation support system 1. Send to.

The construction drawing creation support system 1 includes a communication unit 13, a registration unit 14, a database 15, a processing unit 16, and a communication unit 17.

The communication unit 13 receives information on digital images and absolute coordinates transmitted from the photographing device 11 and the positioning device 12. Then, the information received by the communication unit 13 is registered in the database 15 by the registration unit 14.

In addition to the registered digital images and information on absolute coordinates, gas pipe information is also registered in the database 15. It is referred to the gas pipe information possessed by the two-dimensional code 40, the corresponding gas pipe information is fetched from the database, and the processing unit 16 generates a drawing having the gas pipe information.

The processing unit 16 includes an image determination unit 161, a drawing generation unit 162, and a relative coordinate calculation unit 163.
The image determination unit 161 determines whether or not the digital image captured by the photographing apparatus 11 can be used by the construction drawing creation support system 1 based on whether or not the photographing environment is appropriate, and then the digital image satisfies a predetermined criterion. Judge whether it is a thing or not.

Judgment as to whether or not the shooting environment is appropriate is made based on five judgment items of equipment type, illuminance difference, flash guide number, shutter speed, and ISO value. Further, as a predetermined standard, six determination items of brightness, sharpness, shooting interval, lap ratio between digital images, and position of a subject are judged based on the shot digital image.

Each judgment item will be described.
The type of equipment determines whether or not the photographing device 11 is designated equipment corresponding to the construction drawing creation support system 1.
The number of subsequent determination items differs depending on whether or not the photographing device 11 is designated equipment (see the determination flow in FIG. 20; details will be described later).

The illuminance difference means the difference between the place where the illuminance is the highest and the place where the illuminance is the lowest.
Here, the illuminance is the brightness of the illuminated portion of the subject, and the unit is expressed in lux.
The illuminance difference is evaluated in three stages: 0 to 10000 lux is "small", 1000 to 60,000 lux is "medium", and 60000 to 100,000 is "large" (see FIG. 12). The number of judgment items differs (see the judgment flow in FIG. 20; details will be described later).

The flash guide number refers to the amount of light emitted by the flash, and the larger the value, the larger the amount of light emitted, so that the difference in brightness of the subject is reduced.
When the flash guide number is 0 to 150, the light / dark difference is "large", when it is 150 to 400, the light / dark difference is "medium", and when it is 400 to 500, the light / dark difference is "small". (See FIG. 13), it is determined to be NG when it corresponds to "many".

The shutter speed refers to the time during which the shutter is open when the photographing device 11 takes a picture. The unit of 1/1 or 1/100 shown in FIG. 14 is seconds. Since the operator shoots while moving the photographing device 11 at a constant speed, for example, along the longitudinal report of the gas tube 20, the slower the shutter speed, the longer the distance that the photographing device moves during one shooting. It becomes long and the sharpness of the subject is impaired. In the example of FIG. 14, since the operator shoots while moving the photographing device 11 at a speed of 28 cm per second, when the shutter speed is 1/1 second, the moving distance of the photographing device 11 during one shooting is 28 cm. And the blur of the subject becomes large.
When the shutter speed is 1/1 to 1/100, the sharpness is "blurred", when the shutter speed is 1/100 to 1/500, the sharpness is "intermediate", and when the shutter speed is 1/500 to 1/800, the sharpness is sharp. Is evaluated on a three-point scale of "sharp" (see FIG. 14), and is judged to be NG when it corresponds to "blurring".

The ISO value refers to the sensitivity of the photographing device 11 to light, and the higher the value, the higher the sensitivity, and the photographing device 11 can easily capture the light. Since the ease of capturing light is also related to the ease of capturing noise, the higher the ISO value, the easier it is to capture noise, and the image captured by the photographing device 11 may become rough.
When the ISO value is 800 to 700, the roughness is evaluated as "coarse", when it is 700 to 300, the roughness is evaluated as "intermediate", and when it is 300 to 100, the roughness is evaluated as "smooth" (Fig.). 15), it is judged as NG when it corresponds to "coarse".

Luminance refers to the brightness of the pixels that make up a digital image. For example, the brightness is 0 to 100, the brightness is 0, the brightness is 10, the brightness is 20, the brightness is 30, the brightness is 40, the brightness is 50, the brightness is 60, the brightness is 70, the brightness is 80, the brightness is 90, the brightness is 100, and so on. For each classified brightness, the number of corresponding pixels in the digital image is detected, and the average value of the brightness of the digital image and the dispersion value calculated based on the average value are also obtained. In addition, evaluation is performed on a four-point scale of "over", "under", "high contrast", and "appropriate".

"Over" is a state in which the number of high-brightness pixels is large and the brightness of the digital image is bright. “Under” is a state in which the number of pixels with low brightness is large and the brightness of the digital image is dark. "High contrast" is a state in which the contrast of a digital image is high because the number of pixels having high brightness and the number of pixels having low brightness are large, while the number of pixels having intermediate brightness is small. “Appropriate” is a digital image that is most suitable for drawing because it has a small number of high-luminance pixels and a small number of low-luminance pixels, while it has a large number of pixels with intermediate brightness. In this embodiment, it is determined to be NG except for "appropriate".

Whether the digital image corresponds to "over", "under", "high contrast", or "appropriate" is determined as follows.
First, the average value of the brightness of the digital image is calculated, and "over" or "under" is determined. The average value of the brightness is a value obtained by multiplying the value of the brightness by the number of pixels for each of the above-classified brightness, summing the values, and dividing by the total number of pixels. That is, the number of pixels with a brightness of 0 is n ₁ , the number of pixels with a brightness of 10 is n ₂ , the number of pixels with a brightness of 20 is n ₃ , the number of pixels with a brightness of 30 is n ₄ , and the number of pixels with a brightness of 40 is n. _5. The number of pixels with brightness 50 is n ₆ , the number of pixels with brightness 60 is n ₇ , the number of pixels with brightness 70 is n ₈ , the number of pixels with brightness 80 is n ₉ , and the number of pixels with brightness 90 is n. _10. Assuming that the number of pixels with a brightness of 100 is n ₁₁ , the average value X = (0 × n ₁ + 10 × n ₂ + 20 × n ₃ + 30 × n ₄ + 40 × n ₅ + 50 × n ₆ + 60 × n ₇ + 70 × n ₈ + 80 × n ₉ + 90 × n ₁₀ + 100 × n ₁₁ ) / (n ₁ + n ₂ + n ₃ + n ₄ + n ₅ + n ₆ + n ₇ + n ₈ + n ₉ + n ₁₀ + n ₁₁ ). When the average value X is 40 or less, it corresponds to "under", and when it is 60 or more, it corresponds to "over", and it is NG. Since the average value X of both "high contrast" and "appropriate" is between 40 and 60, it cannot be determined here.

Therefore, the variance value is then determined to determine whether it is "high contrast" or "appropriate". The variance is a value obtained by squaring the value obtained by subtracting the average value X from the brightness value for each of the above-classified brightness, further multiplying the value by the number of pixels, summing the values, and dividing by the total number of pixels. .. That is, the variance Y = {(0-X) ² × n ₁ + (10-X) ² × n ₂ + (20-X) ² × n ₃ + (30-X) ² × n ₄ + (40-X) ) ² x n ₅ + (50-X) ² x n ₆ + (60-X) ² x n ₇ + (70-X) ² x n ₈ + (80-X) ² x n ₉ + (90-X) ) ² x n ₁₀ + (100-X) ² x n ₁₁ } / (n ₁ + n ₂ + n ₃ + n ₄ + n ₅ + n ₆ + n ₇ + n ₈ + n ₉ + n ₁₀ + n ₁₁ ).
When the value of the variance Y is 800 or less, it corresponds to "appropriate", when it corresponds to 1000 or more, it corresponds to "high contrast", and when it corresponds to "high contrast", it is NG.

Further, as shown in FIG. 16, when the number of pixels at each brightness is graphed, "over" is a waveform that rises to the right, "under" is a waveform that falls to the right, "high contrast" is a concave waveform, and "appropriate". Since "" has a convex waveform, it is possible to determine "over", "under", "high contrast", and "appropriate" depending on the shape of the waveform.

Sharpness refers to the degree of emphasis on the contours and borders of a subject in a digital image.
For example, if a green subject and a yellow subject appear adjacent to each other in a digital image as shown in FIG. 17, due to image processing, the boundary between the green subject and the yellow subject is green. And yellow-green pixels mixed with yellow are generated. At the boundary, the smaller the number of yellow-green pixels, the stronger the sharpness of the digital image, and the more the outline and the boundary are emphasized. On the other hand, as the number of the yellow-green pixels increases at the boundary portion, the sharpness of the digital image becomes weaker, and the outline and the boundary line become blurred.
In this embodiment, the case where the pixels of the mixed colors occur in the range of 2 pixels is "sharp" (see FIG. 17 (a)), and the case where the pixels of the mixed colors occur in the range of 4 pixels is "intermediate" ( (See FIG. 17 (b)), the case where it occurs in the range of 6 pixels or more is evaluated in three stages of "blurring" (see FIG. 17 (c)), and when it corresponds to "blurring", it is judged as NG. NS.

The shooting interval refers to the time between shootings by the shooting device 11.
In order to generate a three-dimensional drawing or an ortho image, which will be described later, from a digital image taken by the photographing device 11, a plurality of digital images taken from different viewpoints are taken for the same subject, and the same subject is buried by the principle of triangulation based on the parallax. It is necessary to find the depth and shape of an object. Therefore, the same subject (gas pipe 20 or joint 21) needs to be captured in a plurality of digital images.
Since the operator shoots while moving the shooting device 11 at a constant speed, if the shooting interval is large, the same subject may not be captured in a plurality of digital images. Therefore, the shooting interval is determined based on the shooting time of the photograph, and it is desirable that the shooting interval is taken within 0.5 seconds, and if it exceeds 0.5 seconds, it is determined to be NG. The shooting interval can also be determined based on the setting of the shooting device 11. In this case, the shooting interval is determined in the determination of the shooting environment.

The wrap rate is the degree of overlap between digital images.
As described above, since the same subject needs to appear in a plurality of digital images, the overlapping portion (see FIG. 18) of the digital image 1 and the digital image 2 taken continuously is relative to the area of the digital image. Determine what percentage it is.
If the overlapping portion is 75% or less of the area of the digital image, it is judged as NG, and if it exceeds 75%, it is judged as OK.
In the present embodiment, if it exceeds 75%, it is judged that all are OK, but if it exceeds 90%, the drawing generation unit 162 takes, for example, 200 images continuously when generating the drawing. Since the digital image is used by thinning out every two images from the digital image, it takes a long time to thin out the digital image. Further, if thinning is not performed, the processing time of the drawing generation unit 162 may increase. Therefore, in order to reduce the working time and the processing time of the drawing generation unit 162, if it exceeds 90%, it may be determined as NG. In this case, if the lap rate is within the range of 75 to 90%, the judgment is OK.

The position of the subject determines the position of the gas pipe 20 and the joint 21 appearing in one digital image in the digital image.
For example, when the gas pipe 20 is photographed, as shown in FIG. 19A, the longitudinal direction of the digital image and the longitudinal direction of the gas pipe 20 are parallel to each other, and are substantially in the center of the digital image in the lateral direction. It is desirable that the gas pipe 20 is shown, and in this case, it is determined to be appropriate. As shown in FIG. 19B, even if the longitudinal direction of the digital image and the longitudinal direction of the gas pipe 20 are parallel, if they are deviated from the center of the vertical direction of the digital image, it is NG. In addition, as shown in FIGS. 19 (c) and 19 (d), when the lateral direction of the digital image and the longitudinal direction of the gas pipe 20 are parallel to each other, it is also determined to be NG.
The judgment criteria for each of the judgment items described above are merely examples, and may be adjusted depending on the required accuracy of drawing generation.

Further, in the determination process by the image determination unit 161, determination is performed in each determination item in the order shown in the flow of FIG.
First, the type of equipment is determined (S11). If the photographing device 11 is the designated equipment (S11: YES), then the illuminance difference is determined (S12). Then, when it is determined that the illuminance difference corresponds to "large" (S12: large), then the flash guide number is determined (S13), and the difference in brightness due to the flash guide number corresponds to "medium" or "small". Then, if it is determined (S13: YES), then the shutter speed is determined (S14). When it is determined that the sharpness due to the shutter speed corresponds to "intermediate" or "sharp" (S14: YES), the ISO value is then determined (S15). When it is determined that the roughness based on the ISO value corresponds to "intermediate" or "smooth" (S15: YES), then the brightness is determined (S16). When it is determined that the brightness corresponds to "appropriate" (S16: YES), then the sharpness determination is performed (S17). When it is determined that the sharpness corresponds to "sharp" or "intermediate" (S17: YES), the shooting interval is then determined (S18). When it is determined that the shooting interval is within 0.5 seconds (S18: YES), the lap rate is then determined (S19). When it is determined that the lap rate exceeds 75% (S19: YES), the position of the subject is then determined (S20). Then, when it is determined that the position of the subject is appropriate (S20: YES), the determination process is completed.

When it is determined to be NG in S13 to S20 (S13: NO, S14: NO, S15: NO, S16: NO, S17: NO, S18: NO, S19: NO, S20: NO), processing unit 16 Notifies the communication terminal 18, which will be described later, via the communication unit 17 (S21), and prompts the photographing device 11 to reacquire the digital image.

Further, even when the photographing device 11 is not the designated equipment (S11: NO), the determination is performed in the order of S13 to S20.

In S12, when it is determined that the illuminance difference corresponds to "medium" (S12: medium), then the flash guide number is determined (S22), and the difference in brightness due to the flash guide number becomes "medium" or "small". If it is determined to be applicable (S22: YES), then the shutter speed is determined (S23). When it is determined that the sharpness due to the shutter speed corresponds to "intermediate" or "sharp" (S23: YES), the ISO value is then determined (S24). When it is determined that the roughness based on the ISO value corresponds to "intermediate" or "smooth" (S24: YES), then the imaging interval is determined (S25). When it is determined that the shooting interval is within 0.5 seconds (S25: YES), the position of the subject is then determined (S26). Then, when it is determined that the position of the subject is appropriate (S26: YES), the determination process is completed.

When it is determined to be NG in S22 to S26 (S22: NO, S23: NO, S24: NO, S25: NO, S26: NO), the processing unit 16 passes through the communication unit 17 and is a communication terminal described later. A notification is given to 18 (S27), and the re-acquisition of the digital image by the photographing device 11 is urged. In addition, at the time of notification, we will propose a method for satisfying the criteria for items judged to be NG.

In S12, when it is determined that the illuminance difference corresponds to "small" (S12: small), the shutter speed is then determined (S28). When it is determined that the sharpness due to the shutter speed corresponds to "intermediate" or "sharp" (S28: YES), the ISO value is then determined (S29). When it is determined that the roughness based on the ISO value corresponds to "intermediate" or "smooth" (S29: YES), then the imaging interval is determined (S30). When it is determined that the shooting interval is within 0.5 seconds (S30: YES), the position of the subject is then determined (S31). Then, when it is determined that the position of the subject is appropriate (S31: YES), the determination process is completed.

When it is determined to be NG in S28 to S31 (S28: NO, S29: NO, S30: NO, S31: NO), the processing unit 16 notifies the communication terminal 18 described later via the communication unit 17. (S27), prompting the re-acquisition of the digital image by the photographing device 11.

In addition, at the time of the notification given in S21 or S27 above, a method for satisfying the criteria of the item determined to be NG will be proposed.
For example, when the flash guide number is NG, it is proposed to increase the amount of light of the flash.
When the shutter speed is NG, adjustments such as increasing the shutter speed of the photographing device 11 are adjusted.
When the ISO value is NG, it is proposed to make adjustments such as reducing the setting of the ISO value of the photographing apparatus 11.

If the brightness is determined to be under and the result is NG, it is proposed to increase the amount of light from the flash of the photographing device 11, open the aperture, slow down the shutter speed, increase the ISO value, and the like.
If it is determined that the brightness is over and the result is NG, it is proposed to reduce the amount of light from the flash of the photographing device 11, reduce the aperture, increase the shutter speed, reduce the ISO value, and the like.
If the brightness is determined to be high contrast and the result is NG, it is proposed to increase the amount of flash light of the photographing device 11 or bring the photographing device 11 closer to the subject.

When the sharpness is NG, it is proposed to increase the shutter speed of the photographing device 11, reduce the ISO value, reduce the aperture, and the like. However, even if the sharpness is NG, it may be determined that the ISO value is OK when the ISO value is very close to the limit of the OK range in the determination of the shooting environment. In this case, we only propose changing the shutter speed.
If the shooting interval or lap rate is NG, it is proposed to shorten the shooting interval.
When the position of the subject is NG, it is proposed to change the position of the photographing device 11 so that the subject appears in the center of the digital image.

The drawing generation unit 162 generates a drawing based on a digital image determined by the image determination unit 161 to satisfy a predetermined criterion. Here, the drawings are 3D point group data as a 3D drawing, 3D mesh data, a 3D CAD drawing, an ortho image as a 2D drawing, a 2D CAD drawing, a 3D CAD drawing, and a 2D drawing. Refers to the vector data that is the basis of the CAD drawing.

The drawing generation unit 162 generates a drawing as follows.
First, three-dimensional point cloud data is generated based on a digital image. The three-dimensional point cloud data is a drawing of a three-dimensional image of the gas pipe 20 and the joint 21 by a set of points as shown in FIG. 23, and represents the laid state of the gas pipe 20 and the joint 21 with high accuracy. be able to.

Since the laid state of the three-dimensional point cloud data is drawn with high accuracy, the data size is very large, and it may not operate smoothly on a general computer. Therefore, the drawing generation unit 162 can generate 3D mesh data having a smaller data size based on the 3D point cloud data.

The three-dimensional mesh data is a three-dimensional image of the gas pipe 20 and the joint 21 by meshing the three-dimensional point cloud data (see FIG. 24 (a)) and converting it into polygon data (see FIG. 24 (b)). Is drawn.
By generating three-dimensional mesh data with a smaller data size, it becomes possible to smoothly check the laying state of the gas pipe 20 and the joint 21 even with a general computer. A digital image can be attached to the polygon data as a texture, and as shown in FIG. 24 (c), the laid state of the gas pipe 20 and the joint 21 can be represented in a realistic manner.

Further, the drawing generation unit 162 can generate an ortho image based on the three-dimensional point cloud data.
The orthophoto image is an orthographic projection image as shown in FIG. Since the digital image captured by the photographing device 11 is a central projection, the image on the digital image is distorted due to the difference in the distance from the center of the lens of the photographing device 11 to the gas pipe 20 and the joint 21 which are the objects to be photographed. It will occur. An image obtained by converting such a central projection image into an orthographic projection and correcting distortion is an orthophoto image. By generating the distortion-corrected ortho image, the positions of the gas pipe 20 and the joint 21 can be accurately measured on the ortho image.

Further, the drawing generation unit 162 can generate vector data based on any of the three-dimensional point cloud data, the three-dimensional mesh data, and the ortho image.
The vector data is a drawing that simply represents the laid state of the buried object by using point data, line data, surface data, and body data for the gas pipe 20 and the joint 21.
For example, assuming that two straight gas pipes 20 are connected in series and joints 21 are laid between the connected gas pipes 20 and at both ends, vector data. As a method, points are plotted for each of the three joints 21 drawn in the 3D point cloud data, the 3D mesh data, or the ortho image, and the plotted three points are connected by a line to simplify the laying state. Draw. At this time, the plotting of the position of the joint 21 and the connection of the lines may be performed as an automatic process in the computer, or may be performed by an operator's operation on the screen of the computer. It is also possible to read the absolute coordinates acquired by the positioning device 12 from the database 15 and plot the joint 21 based on the absolute coordinates.
It is possible to have gas tube information as attributes of drawn lines and points in the vector data.

The vector data is the same type of data as the three-dimensional CAD drawing and the two-dimensional CAD drawing, but here, the three-dimensional CAD drawing and the two-dimensional CAD drawing are the gas pipe 20 and the joint 21 laid. It refers to a completed drawing in which the appearance and surrounding conditions (roads, buildings, etc.) are drawn, and will be explained separately from vector data.
For example, when requesting an external company to create a drawing, the rules for creating a completed 3D CAD drawing or 2D CAD drawing (such as the wording in the drawing frame or drawing) may differ depending on the company. , A transaction is carried out between the requestee and the requester using only vector data, which is a simple drawing, and the completed 3D CAD drawing or 2D CAD drawing may be produced by the requester. be. Therefore, even simple vector data is useful drawing data that is traded by itself.

Furthermore, the drawing generation unit 162 can generate a three-dimensional CAD drawing or a two-dimensional CAD drawing based on the vector data.
As shown in FIG. 25, the three-dimensional CAD is a drawing of a three-dimensional image of the gas pipe 20 and the joint 21 by a three-dimensional function. Based on the vector data, the joint is drawn on the points plotted on the vector data, and the gas pipe 20 is drawn on the line connecting the points to generate a three-dimensional CAD drawing. At this time, the types of the gas pipe 20 and the joint 21 to be drawn are specified based on the gas pipe information represented by the two-dimensional code 40. Since it is easy to edit the drawn contents, for example, the drawn gas pipe 20 and the joint 21 can be moved, enlarged, reduced, short-circuited, stretched, etc. on the drawing, and repairs to be performed in the future on the drawing can be performed. It is possible to make a study.

In the three-dimensional CAD drawing, the gas pipe information of the gas pipe 20 and the joint 21 included in the two-dimensional code 40 can be possessed as an attribute of the gas pipe 20 and the joint 21 shown on the drawing. The following four methods can be considered as a method for the user of the drawing to confirm the gas pipe information held in the three-dimensional CAD. First, when the gas pipe 20 on the drawing is clicked on the screen of the computer, a window containing the gas pipe information corresponding to the clicked gas pipe 20 opens and the user can check it. Method. Second, when the mouse pointer is brought close to the gas tube 20, a small window containing gas tube information corresponding to the gas tube 20 brought close to the pointer is displayed near the pointer so that the user can confirm it. How you can do it. The third method is that the gas pipe information of the gas pipe 20 and the joint 21 shown on the drawing is always displayed in the empty space of the drawing display screen and can be confirmed by the user. .. The fourth method is to output a list of gas pipe information separately from the drawing.
In this way, if the confirmation of gas pipe information can be facilitated by the three-dimensional CAD drawing, the burden of acceptance inspection work and settlement work after completion can be reduced.

It is also possible to create a multi-layered drawing in which a layer of a two-dimensional drawing and a layer of a three-dimensional drawing are superposed. It is possible to switch between the display of the two-dimensional drawing and the display of the three-dimensional drawing as necessary.

Next, the two-dimensional CAD drawing refers to a plan view, a cross-sectional view, a side view, etc. showing the laid state of the gas pipe 20 and the joint 21. Based on the vector data, a joint is drawn on the points plotted on the vector data, and a gas pipe 20 is drawn on the line connecting the points to generate a two-dimensional CAD drawing. At this time, the types of the gas pipe 20 and the joint 21 to be drawn are specified based on the gas pipe information represented by the two-dimensional code 40.

Then, in the two-dimensional CAD drawing, the gas pipe information of the gas pipe 20 and the joint 21 included in the two-dimensional code 40 can be possessed as an attribute of the gas pipe 20 and the joint 21 shown on the drawing. As a method for the user of the drawing to confirm the gas pipe information held in the two-dimensional CAD drawing, it is conceivable to use the same method as the four methods for confirming the gas pipe information held in the three-dimensional CAD drawing. ..

It is also possible to create a multi-layered drawing in which a layer of an ortho image and a layer of a two-dimensional CAD drawing are superposed. It is possible to switch between the display of the ortho image and the display of the two-dimensional CAD drawing as necessary.

The drawing generation unit 162 causes the 3D point cloud data, 3D mesh data, ortho image, 3D CAD drawing, and 2D CAD drawing described above to have information on absolute coordinates acquired by the positioning device 12. Can be done. By creating a drawing that holds information on absolute coordinates, it becomes easy to manage what kind of buried object is buried where. For example, when a gas pipe buried by civil engineering work is to be replaced in the future, if there is a drawing generated based on absolute coordinates, the position of the gas pipe should be specified by using GPS equipment. Is possible.

Further, the drawing generation unit 162 provides information on the relative coordinates calculated by the relative coordinate calculation unit 163 based on the three-dimensional point cloud data, the three-dimensional mesh data, the ortho image, the three-dimensional CAD drawing, and the two-dimensional CAD drawing. Can be held. If each of the above drawings has information on relative coordinates, when the gas pipe buried by civil engineering work is to be replaced in the future, if there is a drawing generated based on the relative coordinates, it is predetermined. It is possible to specify the position of the gas pipe by measuring from the reference position of the above with a scale or the like.

The relative coordinate calculation unit 163 is based on the 3D point cloud data, 3D mesh data, ortho image, 3D CAD drawing, and 2D CAD drawing generated by the drawing generation unit 162, and the 2D code 40 with respect to the reference position. Calculate relative coordinates. For example, if an intersection of roads is shown on the drawing, the relative coordinates of the two-dimensional code 40 can be calculated with the intersection as a reference position.

For example, to explain a method of calculating relative coordinates using an ortho image, if an intersection of a road is shown in the ortho image, the relative coordinates of the two-dimensional code 40 can be calculated with the intersection as a reference position. ..
If the reference position is not shown in the ortho image, for example, as shown in FIG. 22, the reference position 31 (for example, an intersection) is far from the buried position of the gas pipe 20, so that the reference position is shown in the ortho image. If not, a relay reference point 32 is provided near the buried object with reference to the original reference position 31 at the construction site, and the relative coordinates of the relay reference point 32 with respect to the reference position 31 are positioned. Then, the photographing device 11 photographs the gas pipe 20 and the joint 21 including the relay reference point 32 to create an ortho image. Then, when it is desired to know the position of an arbitrary point on the ortho image, the relative position of the relay reference point 32 with respect to the relay reference point 32 can be measured, and the relative coordinates of the relay reference point 32 from the reference position 31 can be determined. Since it is acquired by, it is possible to calculate the relative coordinates with reference to the reference position 31 which is not in the ortho image.

Further, if the relative coordinate calculation unit 163 acquires the two-dimensional code 40 and the absolute coordinates of the intersection by the positioning device 12, it is possible to calculate the relative coordinates of an arbitrary position with the absolute coordinates as a reference. In addition, for example, when the two-dimensional code 40 is displayed in two places in the drawing generated by the drawing generation unit 162, the absolute coordinates of one two-dimensional code 40 and the absolute coordinates of the other two-dimensional code 40. Therefore, it is also possible to calculate the relative coordinates of the two-dimensional code 40 that is not used as a reference, with either one of the two-dimensional codes 40 as a reference.

Further, the drawing generation unit 162 can generate geographic information system data in which a three-dimensional CAD drawing or a two-dimensional CAD drawing is linked with a geographic information system.
Geographic information system data is a visualization of the laying state of gas pipes 20 etc. on a map based on 3D CAD drawings and 2D CAD drawings, and the laying state of gas pipes etc. due to construction done in the past. Are all recorded.
By generating geographic information system data, not only gas pipe repair work to be done in the future, but also sewage pipe work, etc., which needs to be done underground, must be taken into consideration for the gas pipe position. It can be used when it does not become.

The drawing generation unit 162 generates a drawing based on a digital image determined by the image determination unit 161 to satisfy a predetermined standard, but all 200 images taken in a day use the standard. Although it is desirable to satisfy the requirements, if the drawing accuracy is not required, such as when the drawings are used as reference drawings, the drawings can be generated even if some digital images do not meet the criteria. In some cases.

The communication terminal 18 is a tablet or the like owned by a worker at the site, and is connected to the construction drawing creation support system 1 via a communication line 19. Therefore, the processing unit 16 can transmit the result of the determination by the image determination unit 161 and the drawing generated by the drawing generation unit 162 via the communication unit 17. By receiving the determination result of the image determination unit 161 at the communication terminal 18, the worker at the site can know whether or not it is necessary to retake the image by the photographing device 11 according to the determination result. Further, by receiving the drawing generated by the drawing generation unit 162, it is also possible to create a daily construction report on the communication terminal 18 using the received drawing.

Next, the two-dimensional code 40 will be described in detail.
As shown in FIG. 4A, for example, the two-dimensional code 40 has a concave shape having a corner portion 402 and a base portion 403 by having five cells 401 arranged two-dimensionally and having a notch portion 404. It is formed. By providing the notch 404, the position of the region of the two-dimensional code 40 can be detected, so that the two-dimensional code 40 captured in the digital image captured by the photographing device 11 is tilted or upside down. However, the processing unit 16 can discriminate the top, bottom, left, and right of the two-dimensional code 40.

The cell 401 is composed of a predetermined color, and in this embodiment, it is composed of any of three colors of red, blue, and green. The color of the cell 401 is not limited to the three colors, and other colors may be set.

The two-dimensional code 40 can represent the gas pipe information of the gas pipe 20 and the joint 21 by the combination of the three colors of red, blue, and green.
More specifically, when the processing unit 16 reads information from the two-dimensional code 40, the colors of each cell 401 are read in the order indicated by the arrow Y in FIG. 4A. It should be noted that each cell 401 may be recognized in the order opposite to the direction indicated by the arrow Y. Then, as shown in FIG. 4 (b), the number corresponding to red is 1, the number corresponding to blue is 2, and the number corresponding to green is 3, for example, in FIG. 4 (a). Since the two-dimensional code 40 shown is arranged in the order of blue, red, red, red, and green, when the numbers corresponding to each color are applied, it represents a sequence of 21113. In the two-dimensional code 40 shown in FIG. 4A, in order to improve the visibility of the operator, the corresponding number is described in the cell 401, and the sequence represented by the two-dimensional code 40 is also displayed in the notch 404. However, it is not necessary to display it.

The two-dimensional code 40 shown in FIG. 4A is an example, and the two-dimensional code 40 is configured by arranging five cells 401 having any one of the three colors of red, blue, and green. A total of 243 combinations of numbers can be created.

In the notch 404 shown in FIG. 4A, the number "5" written above the sequence represented by the two-dimensional code 40 is the code number of the two-dimensional code 40, and the color combination of the cell 401. There are 1 to 243 each.

Code numbers are assigned according to the rules shown in the tables of FIGS. 5, 6, 7, and 8. The bottom row of the table shown in FIG. 5 and the top row of the table shown in FIG. 6 are vertically adjacent to each other, and the bottom row of the table shown in FIG. 6 and the top row of the table shown in FIG. 7 are vertically adjacent to each other. By vertically adjoining the rows and vertically adjoining the bottom row of the table shown in FIG. 7 and the top row of the table shown in FIG. 8, FIG. 5, FIG. 6, FIG. 7, and FIG. The table should be presented continuously, but it is divided for convenience.

The two-dimensional code 40 shown in the tables of FIGS. 5, 6, 7, and 8 has a code number that increases by 1 in the horizontal direction of the table and increases by 9 in the vertical direction.
In the horizontal direction of the table, the colors of the cells 401 forming the bottom portion 403 do not change, and the colors of the left and right cells 401 forming the corner portion 402 are "red-red", "red-blue", "red-green", and "red-green". It is developed in the order of "blue-blue", "blue-green", "blue-red", "green-green", "green-red", and "green-blue".
In the vertical direction of the table, the color of the cell 401 forming the corner portion 402 does not change, but the color and the color position of the cell 401 forming the bottom portion 403 change.
The vertical items "blue x 1", "blue x 2", and "blue x 3" represent the number of blue cells 401 constituting the bottom portion 403, and are "green x 1" and "green" in FIG. Similarly, “x2” and “green × 3” also represent the number of green cells 401.
The "two colors" in FIG. 7 mean that the cell 401 has two colors, blue and green, in addition to the red cell 401. The reason why red is not included in the number of colors is that the base 403 of the code number 1 is based on the fact that it is composed only of red. Further, “blue × 2 + 2 colors” in FIG. 8 means that the number of blue cells 401 is two and consists of two colors, blue and green. Similarly, "green x 2 + 2 colors" means that the number of green cells 401 is two and consists of two colors, blue and green.
If the cells 401 are arranged in a regular manner as shown in FIGS. 5, 6, 7, and 8, it is expected that the visibility will be improved even for the workers in the field.

The law of arranging the cells 401 is not limited to the examples shown in FIGS. 5, 6, 7, and 8. For example, the sequence "11111" represented by the two-dimensional code 40 is code number 1, "11112" is code number 2, "11113" is code number 3, "11121" is code number 4, and "11122" is code number 5. In addition, there is also a method of increasing the code number as the sequence represented by the two-dimensional code 40 increases in ternary notation.

Then, if the gas pipe information is determined for each sequence, the processing unit 16 recognizes the two-dimensional code 40 and extracts the corresponding gas pipe information from the gas pipe information stored in the database 15. Is possible.

The gas pipe information stored in the database 15 is in a state corresponding to a sequence represented by the two-dimensional code 40, as shown in the table shown in FIG. 11, for example.
In this embodiment, the gas pipe information is composed of "model number", "type", "name", "material", "size", "extension", and "amount" of the gas pipe 20 and the joint 21. ..

The "model number" is an individual number for identifying the gas pipe 20 and the joint 21. Although it is represented by a number sequence here, it may be represented by only alphabetic characters or a character string using alphanumeric characters.

The "type" indicates whether the buried object is the gas pipe 20 or the joint 21. Here, it is simply expressed as "pipe" or "joint", but it may be expressed by a symbol or an alphabetic character.

The "name" represents the type of the gas pipe 20 or the joint 21, and although it is expressed as "PE straight pipe" or "welded steel straight pipe" here, it may be expressed by a symbol or an alphabetic character.

The “material” represents a material constituting the gas pipe 20 and the joint 21. Here, it is expressed as "polyethylene" or "steel", but it may be expressed by a symbol or an alphabetic character.

“Size” indicates the diameter of the gas pipe 20 and the joint 21. Here, it is represented by a nominal diameter of 75A, 200A, etc., but an actual dimensional value may be represented.

“Extension” represents the length of the gas pipe 20 and the joint 21. Here, 5m, 5.5m, etc. are described, but the unit may be mm.

The "amount" represents the price of the gas pipe 20 and the joint 21. The unit is a yen, and here, it is represented by "2000", "50,000", etc., but it may be represented by a thousand yen unit or the like.

The gas pipe information is an example and is not limited to the items shown in FIG. For example, since it is empirically known how much wages will be required for burial depending on the type of gas pipe 20 or joint 21, it is possible to include information on wages. If the information on wages is included in the gas pipe information held in the drawings generated by the drawing generation unit 162, the construction cost can be easily calculated. Since the construction cost here is calculated based on the wages that are known from experience, it can be said that it is an approximate construction cost. The exact construction cost depends on how deep the ground 30 is dug up when laying the gas pipe 20 and the joint 21. Therefore, the accurate construction cost is calculated based on the three-dimensional point cloud data, the three-dimensional mesh data, the three-dimensional CAD drawing, and the two-dimensional CAD drawing having the information of the depth of the installation groove 30a.

Next, a procedure for the processing unit 16 to recognize the two-dimensional code 40 will be described.
Normally, first, the concave shape of the two-dimensional code 40 captured in the digital image captured by the photographing device 11 is recognized, and the orientation of the two-dimensional code 40 is confirmed. As a result, the positions of the corner portion 402 and the bottom portion 403 are determined. Then, the colors of each cell 401 are read in the order indicated by the arrow Y, and the sequence represented by the two-dimensional code 40 is derived from the numbers corresponding to each color.

However, due to image processing, as shown in FIG. 9A, the gap between the cells 401 may be filled and the cells 401 may be integrated.
In such a case, first, the concave shape of the two-dimensional code 40 is recognized, and the orientation of the two-dimensional code 40 is confirmed. Then, it is divided into five cells 401 based on the notch portion 404. For example, as shown in FIG. 9B, the cell is divided into five cells by a dividing line 405 provided with the notch 404 as a reference.
By dividing into five cells 401, it becomes possible to recognize how many colors each of the five cells has, and it becomes possible to derive a sequence represented by the two-dimensional code 40 from the numbers corresponding to each color.

Further, since the gas pipe 20 and the joint 21 have a cylindrical shape, the two-dimensional code 40 attached to the gas pipe 20 and the joint 21 is curled up following the cylindrical shape. Then, as shown in FIGS. 10A-(e), when the image is taken with the photographing apparatus 11, there is a possibility that the entire two-dimensional code 40 is not captured and a part of the two-dimensional code 40 is lost (hereinafter, lost). The part is called the missing part 406). In such a case, the two-dimensional code 40 is recognized as follows.

First, as shown in FIGS. 10A and 10B, a case where a defective portion 406 is generated in a part of the corner portion 402 and the bottom portion 403 will be described.
First, the concave shape is recognized and the orientation of the two-dimensional code 40 is confirmed. As a result, the positions of the corner portion 402 and the bottom portion 403 are determined.
Then, it recognizes how many colors the two-dimensional code 40 is composed of. In the example shown in FIGS. 10A and 10B, it is recognized that the example is composed of two colors, blue and red.
Next, the color of the corner portion 402 is recognized. In the examples shown in FIGS. 10A and 10B, it is recognized that both the left and right sides are blue.
After that, the colors constituting the bottom portion 403 are recognized. In the examples shown in FIGS. 10A and 10B, it is recognized that the bottom portion 403 is composed of blue and red.
After recognizing the colors constituting the bottom portion 403, the lengths of the colors constituting the bottom portion 403 in the horizontal direction in the drawing are recognized. In the examples shown in FIGS. 10A and 10B, blue is the length of one cell and red is the length of two cells. As a result, even if a part of the bottom portion 403 is missing, it is possible to recognize in what color the three cells 401 constituting the bottom portion 403 are arranged in this order.
As described above, the two-dimensional code 40 shown in FIGS. 10A and 10B is composed of blue, blue, red, red, and blue in the order of the arrows Y in FIG. 4A. Can be recognized, and the sequence represented by the two-dimensional code 40 can be derived from the numbers corresponding to each color.

Next, as shown in FIGS. 10 (c), 10 (d), and (e), a case where a defective portion 406 is generated at the lateral end of the two-dimensional code 40 in the figure will be described.
First, the concave shape is recognized and the orientation of the two-dimensional code 40 is confirmed. As a result, the positions of the corner portion 402 and the bottom portion 403 are determined.
Then, it recognizes how many colors the two-dimensional code 40 is composed of.
In the examples shown in FIGS. 10C, 10D, and 10E, it is recognized that the two-dimensional code 40 is composed of two colors, blue and red.
Next, the color of the corner portion 402 is recognized. In the examples shown in FIGS. 10 (c), (d), and (e), it is recognized that both the left and right sides are blue.
After that, the colors constituting the bottom portion 403 are recognized. In the examples shown in FIGS. 10 (c), (d), and (e), it is recognized that the components are blue and red.

After recognizing the colors constituting the bottom portion 403, the lengths of the colors constituting the bottom portion 403 in the horizontal direction in the drawing are recognized. In the example shown in FIG. 10 (c), blue is the length of 0.5 cell due to the defect, and red is the length of 2 cells. In the example shown in FIG. 10D, the blue color is the length of one cell, and the red color is the length of 1.5 cells due to the defect. In the example shown in FIG. 10 (e), the blue color is 0.5 cell length and the red color is 1.5 cell length due to the defect.
Next, the lateral length of the corner portion 402 in the figure is recognized. In the example shown in FIG. 10 (c), the blue color on the left side is the length of 0.5 cell due to the defect, and the blue color on the right side is the length of one cell. In the example shown in FIG. 10D, the blue color on the left side is the length of one cell, and the blue color on the right side is the length of 0.5 cell due to the defect. In the example shown in FIG. 10 (e), blue is 0.5 cells long due to defects on both the left and right sides.

By recognizing the length of the bottom portion 403 in the horizontal direction in the figure and the length of the corner portion 402 in the horizontal direction in the figure, it is possible to determine how much the left and right sides of the two-dimensional code 40 are missing. Calculate the defect length. In the example shown in FIG. 10C, since the left side of both the corner portion 402 and the bottom portion 403 is missing by 0.5 cell, it is calculated that the left side of the two-dimensional code 40 as a whole is missing by 0.5 cell. Will be done. Similarly, in the example shown in FIG. 10 (d), it is calculated that the right side of the two-dimensional code 40 is missing by 0.5 cells, and in the example shown in FIG. 10 (e), the left and right sides of the two-dimensional code 40 are missing. Is calculated to be missing by 0.5 cells.

Based on the calculated defect length, the lateral length of the bottom portion 403 is corrected, and how many cells each of the colors constituting the bottom portion 403 are recognized. In the example shown in FIG. 10 (c), the defect of 0.5 cell on the left side of the bottom portion 403 is corrected. In the example shown in FIG. 10D, the defect of 0.5 cell on the right side of the bottom portion 403 is corrected. In the example shown in FIG. 10 (e), the loss of 0.5 cells on the left and right of the bottom portion 403 is corrected. By this correction, it can be recognized that the bottom portion 403 of the two-dimensional code 40 shown in FIGS. 10 (c), (d), and (e) is composed of one blue cell and two red cells. Become. It is not necessary to correct the corner portion 402 because it is sufficient to recognize the color of each of the left and right portions.
As described above, the two-dimensional code 40 shown in FIGS. 10 (c), 10 (d), and (e) is composed of blue, blue, red, red, and blue in the order of the arrows Y in FIG. 4 (a). It becomes recognizable that it is done.
As described above, according to the two-dimensional code 40, it is possible to recognize the content represented by the two-dimensional code 40 even in a partially missing state.

Further, the determination of whether or not the digital image performed by the image determination unit 161 satisfies a predetermined criterion can be determined by the gas pipe 20 and the joint 21 shown in the digital image, as well as the gas pipe 20 and the joint 21. It is also possible to judge by the two-dimensional code 40 attached to.
The determination items that can be determined by the two-dimensional code 40 are, for example, sharpness, brightness, and the position of the subject.

For sharpness, for example, when a red cell 401 and a blue cell 401 are adjacent to each other, how many purple pixels, which are a mixture of red and blue, are generated between the red cell 401 and the blue cell 401. Judge by whether or not.
The brightness is determined by the brightness of the pixels constituting the image of the two-dimensional code 40 in the digital image.

For the position of the subject, for example, the two-dimensional code 40 is attached to the gas tube 20 so that the vertical center line shown in FIG. 4A of the two-dimensional code 40 and the longitudinal center line of the gas tube 20 are aligned with each other. If it is determined to be attached, the determination can be made by detecting the position and orientation of the two-dimensional code 40 in the digital image.

Further, the arrangement pattern of the cell 401 is not limited to the concave shape of the two-dimensional code 40.
As shown in FIG. 26, by arranging the six cells 401 two-dimensionally and providing the notch 404, it is possible to form the two-dimensional code 41 in a substantially concave shape. By providing the cutout portion 404, the processing unit 16 can discriminate the top, bottom, left, and right of the two-dimensional code 41. Then, the colors of each cell 401 can be read in the order indicated by the arrow Y, and the sequence represented by the two-dimensional code 41 can be derived from the numbers corresponding to each color.
According to the two-dimensional code 41, since the cell 401 is composed of six cells 401 composed of any of the three colors of red, blue, and green, a total of 729 combinations of sequences are used. Can be made.

As another example of the substantially concave shape, an arrangement pattern of cells 401 such as the two-dimensional codes 42, 43, 44, 45 shown in FIGS. 27, 28, 29, and 30 can be considered. The notch 404 allows the processing unit 16 to discriminate the top, bottom, left, and right of the two-dimensional codes 42, 43, 44, and 45, respectively. Then, the colors of each cell 401 can be read in the order indicated by the arrow Y, and the sequence represented by the two-dimensional codes 42, 43, 44, 45 can be derived from the numbers corresponding to each color.
According to the two-dimensional code 42, since the cell 401 is composed of six cells 401 composed of any of the three colors of red, blue, and green, a total of 729 combinations of sequences are used. Can be made.
According to the two-dimensional codes 43 and 44, since the cell 401 is composed of seven cells 401 composed of any of the three colors of red, blue, and green, a total of 2187 combinations of sequences can be used. Can be made.
According to the two-dimensional code 45, since the cell 401 is composed of eight cells 401 composed of any of the three colors of red, blue, and green, a total of 6651 combinations of sequences are created. Can be done.

Further, in addition to the substantially concave shape, as shown in FIG. 31, it is also possible to form the two-dimensional code 46 in an L shape by arranging the three cells 401 two-dimensionally and providing the notch 404. Is. By providing the notch portion 404, the processing unit 16 can discriminate the top, bottom, left, and right of the two-dimensional code 46. Then, the colors of each cell 401 are read in the order indicated by the arrow Y, and the sequence represented by the two-dimensional code 46 is derived from the numbers corresponding to each color.
According to the two-dimensional code 46, since the cell 401 is composed of three cells 401 having any of the three colors of red, blue, and green, a total of 27 combinations of sequences are used. Can be made.

As another example of the L-shaped modification, an arrangement pattern of cells 401 such as the two-dimensional codes 47, 48, 49, 50 shown in FIGS. 32, 33, 34, and 35 can be considered. The notch 404 allows the processing unit 16 to discriminate the top, bottom, left, and right of the two-dimensional codes 47, 48, 49, and 50, respectively. Then, the colors of each cell 401 can be read in the order indicated by the arrow Y, and the sequence represented by the two-dimensional codes 47, 48, 49, 50 can be derived from the numbers corresponding to each color.
According to the two-dimensional code 47, since the cell 401 is composed of four cells 401 having any of the three colors of red, blue, and green, 81 combinations of sequences are used in total. Can be made.
According to the two-dimensional code 48, since the cell 401 is composed of six cells 401 composed of any of the three colors of red, blue, and green, a total of 729 combinations of sequences are created. Can be done.
According to the two-dimensional codes 49 and 50, since the cell 401 is composed of seven cells 401 composed of any of the three colors of red, blue, and green, a total of 2187 combinations of sequences can be used. Can be made.

As another modification, it is conceivable to arrange the cells 401 as shown in the two-dimensional codes 51, 52, 53, 54 shown in FIGS. 36, 37, 38, and 39.
In the two-dimensional code 51, seven cells 401 are arranged in a substantially square shape, and the processing unit 16 can discriminate the top, bottom, left, and right of the two-dimensional code 51 by the cutouts 404 arranged at the corners. It will be possible. Then, the colors of each cell 401 are read in the order indicated by the arrow Y, and the sequence represented by the two-dimensional code 51 is derived from the numbers corresponding to each color.

The two-dimensional code 52 is obtained by arranging seven cells 401 in a substantially hook shape. The notch 404 allows the processing unit 16 to discriminate between the top, bottom, left, and right of the two-dimensional code 52. Then, the colors of each cell 401 are read in the order indicated by the arrow Y, and the sequence represented by the two-dimensional code 52 is derived from the numbers corresponding to each color.

The two-dimensional code 53 is formed by arranging six cells 401 two-dimensionally and forming a substantially V shape. The notch 404 allows the processing unit 16 to discriminate between the top, bottom, left, and right of the two-dimensional code 53. Then, the colors of each cell 401 are read in the order of the numbers displayed in the cells 401, and the sequence represented by the two-dimensional code 53 is derived from the numbers corresponding to each color. The numbers displayed in the cell 401 are shown for convenience of explanation, and do not need to be displayed in the cell 401.

The two-dimensional code 54 is formed by arranging seven cells 401 two-dimensionally and forming a substantially V shape. The notch 404 allows the processing unit 16 to discriminate between the top, bottom, left, and right of the two-dimensional code 54. Then, the colors of each cell 401 are read in the order of the numbers displayed in the cells 401, and the sequence represented by the two-dimensional code 54 is derived from the numbers corresponding to each color. The numbers displayed in the cell 401 are shown for convenience of explanation, and do not need to be displayed in the cell 401.

The colors of the cells 401 constituting the two-dimensional codes 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54 are three colors of red, blue, and green. Other colors may be set without limitation.

Next, the operation of the construction drawing creation support system 1 of the present embodiment will be described.
The gas pipe 20 and the joint 21 arranged in the installation groove 30a by the photographing device 11 are photographed before embedding, and a digital image is acquired. Then, the acquired digital image is transmitted to the construction drawing creation support system 1 via the communication line 19.
Then, the positioning device 12 acquires the absolute coordinates of the two-dimensional code 40 attached to the gas pipe 20 and the joint 21 arranged in the installation groove 30a before embedding. The acquired information on the absolute coordinates is transmitted to the construction drawing creation support system 1 via the communication line 19. The above is done by the worker at the construction site.

The transmitted digital image and information on absolute coordinates are received by the communication unit 13. Then, the registration unit 14 performs a process of registering the received digital image and the information regarding the absolute coordinates in the database 15.

Then, the processing unit 16 reads out the digital image from the database 15, and the image determination unit 161 performs the determination processing of the digital image based on the flow of FIG. When the notification is given as in S21 and S27 in FIG. 20, the processing unit 16 notifies the communication terminal 18 via the communication line 19 by the communication unit 17. Upon confirming that the notification has been given, the worker at the construction site reacquires the digital image using the photographing device 11.

When the determination process is completed, the drawing generation unit 162 generates a drawing based on the digital image for which the determination process is completed.
The drawing generation unit 162 first generates three-dimensional point cloud data based on the digital image. Then, 3D mesh data and ortho image can be generated based on 3D point cloud data, and vector data can be generated based on any of 3D point cloud data, 3D mesh data, and ortho image. Is. When generating the vector data, the gas pipe information corresponding to the sequence represented by the two-dimensional code 40 is read from the database 15 and the gas pipe information is stored in the vector data. Further, it is possible to generate a three-dimensional CAD drawing or a two-dimensional CAD drawing based on the vector data, and further, it is possible to generate geographic information system data based on the three-dimensional CAD drawing or the two-dimensional CAD drawing. ..
When generating each drawing, the drawing generation unit 162 reads information on absolute coordinates from the database 15 and stores the information in the drawing. Further, the relative coordinate calculation unit 163 calculates the relative coordinates of the two-dimensional code 40 based on the drawing generated by the drawing generation unit 162, and the drawing generation unit 162 has the information regarding the relative coordinates in the drawing.

The user of the construction drawing creation support system 1 arbitrarily selects the necessary drawing from each drawing of 3D point group data, 3D mesh data, ortho image, vector data, 3D CAD drawing, and 2D CAD drawing. It is also possible to generate an additional drawing, such as creating a three-dimensional CAD drawing after creating a two-dimensional CAD drawing.

When the drawing generation is completed, the generated drawing is stored in the database 15. Further, if necessary, the communication unit 17 transmits the drawing generated to the communication terminal 18 via the communication line 19. Workers at the site can quickly create a daily construction report at the site using the received drawings.

As described above, according to the construction drawing creation support system 1 of the present embodiment,
(1) In the construction drawing creation support system 1 for creating a drawing showing the laying state of the buried object such as the gas pipe 20 and the joint 21 buried in the ground by the civil engineering work, the gas pipe 20 and the joint 21 An imaging device 11 that captures at least a digital image of the gas pipe 20 and the joint 21 after being placed in the ground and before embedding, and an image determination unit 161 that determines whether or not the digital image meets a predetermined criterion. The image determination unit 161 includes a drawing generation unit 162 that creates a drawing using a digital image determined to satisfy the predetermined criteria. Therefore, before embedding the gas pipe 20 or the joint 21 The laying condition can be recorded efficiently, and the burden of creating a daily construction report for workers at the site can be reduced.
That is, first, the worker at the site takes a digital image of at least the gas pipe 20 and the joint 21 after the gas pipe 20 and the joint 21 are arranged in the ground by the photographing device 11 and before the embedding. Then, the image determination unit 161 determines whether or not the digital image satisfies the predetermined criteria, and the drawing generation unit 162 creates a drawing using the digital image determined by the image determination unit 161 to satisfy the predetermined criteria. .. Since the on-site worker can create a daily construction report using the drawing, it takes time and effort to perform manual measurement in order to draw the laying state of the gas pipe 20 and the joint 21 as in the conventional case. It is possible to record the laying state of the gas pipe 20 and the joint 21 without the need, and it is possible to reduce the burden of creating a daily construction report for workers at the site.
The predetermined criteria are, for example, sharpness, brightness, ISO value, position of a subject in a digital image, lap ratio between digital images, and the like.

(2) The construction drawing creation support system 1 according to (1) is characterized in that the drawings include at least a three-dimensional drawing, so that a gas pipe is not used without using an expensive device such as a laser scan. The laying state of 20 and the joint 21 can be recorded as a three-dimensional drawing.

(3) In the construction drawing creation support system 1 according to (1) or (2), the drawing includes at least an ortho image. The position and the like can be measured accurately, and the worker at the site can save the trouble of performing the survey to create the daily construction report, and the burden of creating the daily construction report is reduced.
Since the digital image captured by the photographing device 11 is a central projection, the image on the image is distorted due to the difference in the distance from the center of the lens of the photographing device 11 to the object to be photographed. An image obtained by converting such a central projection image into an orthographic projection and correcting distortion is an orthophoto image. By generating the distortion-corrected ortho image, the positions of the gas pipe 20 and the joint 21 can be accurately measured on the ortho image.

(4) In the construction drawing creation support system 1 according to any one of (1) to (3), the image determination unit 161 produces a digital image based on the shooting environment in which the digital image is shot by the shooting device 11. Since it is characterized in that it is determined whether or not it can be used by the construction drawing creation support system 1, and when it is determined that it can be used, it is determined whether or not it meets a predetermined standard. Therefore, it is used based on the shooting environment. If it is determined that it is not possible, it is not necessary to determine whether or not the predetermined criteria are satisfied thereafter, so that the waste of the determination process can be eliminated.

(5) In the construction drawing creation support system 1 according to any one of (1) to (4), the gas pipe 20 and the joint 21 have the two-dimensional code 40 at a predetermined position on the surface, and the imaging device. 11 is to take a digital image of the gas pipe 20 and the joint 21 including the two-dimensional code 40, and the image determination unit 161 determines whether or not the digital image satisfies a predetermined criterion, at least the two-dimensional code reflected in the digital image. Since the determination is made by 40, it becomes easy to determine whether or not the image determination unit satisfies a predetermined criterion, and the construction drawing creation support system can create the drawing more smoothly. For example, if it is determined whether or not the sharpness of an image is appropriate as a predetermined criterion, it depends on how much the image of the sign itself is blurred or how much the boundary between the sign and the buried object is blurred. The sharpness can be judged. In addition, the roughness of the mark on the image determines whether the roughness of the image reaches the standard, and the position of the mark on the image indicates whether the buried object is in an appropriate position on the image. It is possible to judge.

(6) In the construction drawing creation support system 1 according to (5), the two-dimensional code 40 includes at least information on the shape and size of the gas pipe 20 and the joint 21, and the drawing generation unit 162 has the two-dimensional code. Since it is characterized in that a drawing holding the information included in 40 is created, the burden of creating a daily construction report of a worker at the site is reduced.
Since information such as the shape and size of the gas pipe 20 and the joint 21 is generally written in the daily construction report, the operator makes a note of the information such as the shape and size of the buried object during the work. In addition, information on the gas pipe 20 and the joint 21 is written in the daily construction report based on the memo. Such work is complicated and may cause a description error, so that it is difficult to guarantee accurate information entry. Therefore, if the two-dimensional code 40 provided in the gas pipe 20 and the joint 21 includes the information of the gas pipe 20 and the joint 21, and a drawing having the information included in the two-dimensional code 40 is created, the site is created. Workers do not have to bother to check the shape, size, etc., and the burden of creating daily construction reports for workers at the site is reduced.

(7) In the construction drawing creation support system 1 according to (6), the two-dimensional code 40 is a two-dimensional arrangement of a plurality of cells 401 having a predetermined color, and is the two-dimensional code 40. A notch 404 for detecting the position of the region is provided, and information on the gas pipe 20 and the joint 21 is represented by a color combination. Therefore, the image is captured in the digital image taken by the photographing device 11. By detecting the color combination of the two-dimensional code 40, the information on the gas pipe 20 and the joint 21 (the shape and size of the gas pipe 20 and the joint 21, etc.) can be read. Further, since the notch 404 for detecting the position of the region of the two-dimensional code 40 is provided, even if the two-dimensional code 40 captured in the digital image captured by the photographing device 11 is tilted, the two-dimensional code 40 is provided. It is possible to discriminate the top, bottom, left, and right of the 40, and it is possible to accurately read the information of the gas pipe 20 and the joint 21 that the two-dimensional code 40 has.

(8) In the construction drawing creation support system 1 according to any one of (5) to (7), a position information acquisition unit (positioning device 12, relative coordinate calculation unit 163) that acquires the position information of the two-dimensional code 40. ), And the drawing generation unit 162 creates a drawing holding the position information acquired by the position information acquisition unit (positioning device 12, relative coordinate calculation unit 163). Position information is acquired from the position of the two-dimensional code 40 including information on the shape and size of the joint 21, and a drawing holding the position information is created. Therefore, it becomes easy to manage what kind of gas pipe 20 and joint 21 are buried where, and the burden of creating a daily construction report for workers at the site is reduced.

(11) In the construction drawing creation support system 1 according to (8), the position information acquisition unit calculates the relative coordinates of the two-dimensional code 40 with respect to a predetermined reference position based on the image taken by the photographing device 11. The position information includes a relative coordinate calculation unit 163 and a positioning device 12 that acquires the absolute coordinates of the two-dimensional code 40 after the gas pipe 20 and the joint 21 are placed in the ground and before being embedded. Is characterized in that the relative coordinates and the absolute coordinates are included, so that a drawing showing the laying state can be generated based on the relative coordinates and the absolute coordinates. For example, when a gas pipe buried by civil engineering work is to be replaced in the future, if there is a drawing generated based on relative coordinates and absolute coordinates, measurement is performed from a predetermined reference position on a scale or the like. Alternatively, the position of the gas pipe can be specified by using a GPS device. GPS devices are expensive, and it is possible that multiple GPS devices cannot be prepared. Then, if construction is to be carried out at multiple locations at the same time, there are sites where GPS equipment cannot be used. In such a case, if the gas pipe position can be specified by both the relative coordinates and the absolute coordinates, it can be flexibly dealt with.

(12) In the construction drawing creation support system 1 according to any one of (1) to (8), the image determination unit 161 determines whether or not the predetermined criteria are satisfied by the construction drawing creation support system. Since it is characterized by notifying the user of 1 and proposing a method for satisfying the predetermined standard together with the notification when it is determined that the predetermined standard is not met, the construction drawing creation support system The user (for example, a worker at a construction site) can know the result of determination as to whether or not the image performed by the image determination unit 161 meets a predetermined standard, and is determined not to satisfy the predetermined standard. If so, you can receive suggestions for methods to meet certain criteria. The method for satisfying a predetermined standard relates to a method of shooting with a shooting device such as adjustment of a shutter speed.

Next, the construction drawing creation support system 2 according to the second embodiment will be described.
As shown in FIG. 40, the difference from the construction drawing creation support system 1 according to the first embodiment is that the positioning device 12 is not provided, and the position information acquisition unit is composed of only the relative coordinate calculation unit 163. It is a point that has been done.
The drawing generation unit 162 has the relative coordinates and the gas pipe information represented by the two-dimensional code 40 in the drawing.
Others are the same as the construction drawing creation support system 1 according to the first embodiment.

As described above, according to the construction drawing creation support system 2 of the second embodiment,
(9) In the construction drawing creation support system 2 described in (8), the position information acquisition unit calculates the relative coordinates of the two-dimensional code 40 with respect to a predetermined reference position based on the image taken by the photographing device 11. Since it is characterized in that it is composed of the relative coordinate calculation unit 163 and that the position information includes at least the relative coordinates, the drawing can hold information on the relative coordinates. For example, when the gas pipe 20 buried by civil engineering work is to be replaced in the future, if there is a drawing generated based on the relative coordinates, it can be measured from a predetermined reference position on a scale or the like. The position of the gas pipe 20 can be specified.

Next, the construction drawing creation support system 3 according to the third embodiment will be described.
As shown in FIG. 41, the processing unit 16 does not have the relative coordinate calculation unit 163, and the position information acquisition unit is a positioning device, which is different from the construction drawing creation support system 1 according to the first embodiment. It is a point composed of only twelve.
The drawing generation unit 162 has the absolute coordinates and the gas pipe information represented by the two-dimensional code 40 in the drawing.
Others are the same as the construction drawing creation support system 1 according to the first embodiment.

As described above, according to the construction drawing creation support system 3 of the third embodiment,
(10) In the construction drawing creation support system 3 described in (8), the position information acquisition unit acquires the absolute coordinates of the two-dimensional code 40 after the buried object is placed in the ground and before the buried object is embedded. Since it is characterized in that it is composed of the positioning device 12 and that the position information includes at least absolute coordinates, it is possible to have information on the absolute coordinates held in the drawing. For example, when the gas pipe 20 buried by civil engineering work is to be replaced in the future, if there is a drawing generated based on the absolute coordinates, the position of the gas pipe 20 can be specified by using a GPS device. It becomes possible to do. At present, since GPS devices are expensive, it is common to specify the position of a gas pipe based on relative coordinates by a scale or the like. However, with the spread of GPS devices in the future, the present invention Increased usefulness.

The first to third embodiments are merely examples, and do not limit the present invention in any way. Therefore, as a matter of course, the present invention can be improved and modified in various ways without departing from the gist thereof.
For example, in the first to third embodiments, the communication unit 13 receives the digital image acquired by the photographing device 11 and the absolute coordinates acquired by the positioning device 12 via the communication line 19 such as the Internet. However, it is also possible to input the digital image acquired by the photographing device 11 and the absolute coordinates acquired by the positioning device 12 into the construction drawing creation support system 1 using a wired connection or a storage medium such as a memory card. good.
Further, in the first to third embodiments, the image determination unit 161 is a part of the processing unit 16, but it is provided in, for example, a notebook computer or a smartphone used by a worker at a construction site. It may be a thing.

1 Construction drawing creation support system 11 Imaging device 20 Gas pipe 21 Fittings 161 Image judgment unit 162 Drawing generation unit

Claims (12)

In the construction drawing creation support system that creates a drawing showing the laying state of the buried object buried in the ground by the civil engineering work.
An imaging device that captures at least an image of the buried object after it is placed in the ground and before it is embedded.
An image determination unit that determines whether or not the image meets a predetermined criterion,
A drawing generation unit that creates the drawing using an image determined by the image determination unit to satisfy the predetermined criteria, and a drawing generation unit.
To prepare
The predetermined criterion is the image quality of the image.
A construction drawing creation support system featuring. In the construction drawing creation support system that creates a drawing showing the laying state of the buried object buried in the ground by the civil engineering work.
An imaging device that captures at least an image of the buried object after it is placed in the ground and before it is embedded.
An image determination unit that determines whether or not the image meets a predetermined criterion,
A drawing generation unit that creates the drawing using an image determined by the image determination unit to satisfy the predetermined criteria, and a drawing generation unit.
To prepare
The drawings include at least a three-dimensional drawing.
A construction drawing creation support system featuring. In the construction drawing creation support system according to claim 1 or 2.
The drawings should include at least an ortho image.
A construction drawing creation support system featuring. In the construction drawing creation support system according to any one of claims 1 to 3,
The image determination unit determines whether or not the image can be used in the construction drawing creation support system based on the shooting environment in which the image was shot by the shooting device, and when it is determined that the image can be used, the predetermined image determination unit Judging whether or not the criteria are met,
A construction drawing creation support system featuring. In the construction drawing creation support system according to any one of claims 1 to 4.
The buried object shall have a mark at a predetermined position on the surface.
The photographing device captures an image of the buried object including the sign.
The image determination unit determines whether or not the image satisfies a predetermined criterion, at least by the signature reflected in the image.
A construction drawing creation support system featuring. In the construction drawing creation support system that creates a drawing showing the laying state of the buried object buried in the ground by the civil engineering work.
An imaging device that captures at least an image of the buried object after it is placed in the ground and before it is embedded.
An image determination unit that determines whether or not the image meets a predetermined criterion,
A drawing generation unit that creates the drawing using an image determined by the image determination unit to satisfy the predetermined criteria, and a drawing generation unit.
To prepare
The buried object shall have a mark at a predetermined position on the surface.
The photographing device captures an image of the buried object including the sign.
The image determination unit determines whether or not the image satisfies a predetermined criterion, at least by the signature reflected in the image.
The sign contains at least information on the shape and size of the buried object.
The drawing generation unit creates the drawing that holds the information contained in the sign.
A construction drawing creation support system featuring. In the construction drawing creation support system according to claim 6,
The sign is a two-dimensional arrangement of a plurality of cells having a predetermined color, includes a notch for detecting the position of a region of the mark, and the buried object is described by a combination of colors. Representing information,
A construction drawing creation support system featuring. In the construction drawing creation support system according to any one of claims 5 to 7.
A position information acquisition unit for acquiring the position information of the sign is provided.
The drawing generation unit creates the drawing holding the position information acquired by the position information acquisition unit.
A construction drawing creation support system featuring. In the construction drawing creation support system according to claim 8,
The position information acquisition unit includes a relative coordinate calculation unit that calculates the relative coordinates of the sign with respect to a predetermined reference position based on an image captured by the imaging device.
The position information includes at least the relative coordinates.
A construction drawing creation support system featuring. In the construction drawing creation support system according to claim 8,
The position information acquisition unit is composed of a positioning device that acquires the absolute coordinates of the sign after the buried object is placed in the ground and before the embedded object.
The position information includes at least the absolute coordinates.
A construction drawing creation support system featuring. In the construction drawing creation support system according to claim 8,
The position information acquisition unit is a relative coordinate calculation unit that calculates the relative coordinates of the sign with respect to a predetermined reference position based on an image taken by the imaging device, and after disposing the buried object in the ground. It consists of a positioning device that acquires the absolute coordinates of the sign before embedding.
The position information includes the relative coordinates and the absolute coordinates.
A construction drawing creation support system featuring. In the construction drawing creation support system according to any one of claims 1 to 11.
The image determination unit notifies the user of the construction drawing creation support system of the determination result of whether or not the predetermined criteria are satisfied.
If it is determined that the predetermined criteria are not met, the method for satisfying the predetermined criteria should be proposed together with the notification.
A construction drawing creation support system featuring.

Images