WO2021106189A1 - Crack measuring device, crack measuring system, crack measuring method, and crack measuring program - Google Patents

Crack measuring device, crack measuring system, crack measuring method, and crack measuring program Download PDF

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Publication number
WO2021106189A1
WO2021106189A1 PCT/JP2019/046765 JP2019046765W WO2021106189A1 WO 2021106189 A1 WO2021106189 A1 WO 2021106189A1 JP 2019046765 W JP2019046765 W JP 2019046765W WO 2021106189 A1 WO2021106189 A1 WO 2021106189A1
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Prior art keywords
crack
length
image
pixels corresponding
width
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PCT/JP2019/046765
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French (fr)
Japanese (ja)
Inventor
達将 樺澤
健聖 鈴木
パスカル デビッド バヤシ
小林　浩
力矢 相澤
裕典 田生
英彰 小尾
泰光 武田
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株式会社Ｒｉｓｔ
東急リバブル株式会社
ジャパンホームシールド株式会社
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Priority to PCT/JP2019/046765 priority Critical patent/WO2021106189A1/en
Publication of WO2021106189A1 publication Critical patent/WO2021106189A1/en

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/88—Investigating the presence of flaws or contamination

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  • the present invention relates to a crack measuring device, a crack measuring system, a crack measuring method, and a crack measuring program.
  • an inspector may measure the degree of damage in order to evaluate whether or not the damage is acceptable.
  • Patent Document 1 a reference image for specifying a photographing surface is projected on the evaluation target surface, and a photographed image of the evaluation target surface including the reference image is acquired.
  • a surface evaluation method for calculating the resolution of pixels included in a captured image based on the arrangement of a reference image included in the captured image and evaluating the surface state of the surface to be evaluated is described.
  • the present invention provides a crack measuring device, a crack measuring system, a crack measuring method, and a crack measuring program that can more easily measure the crack width appropriately.
  • the crack measuring device calculates the number of pixels corresponding to the width of the crack included in the image and the acquisition unit that acquires the image of the building to which the label as a reference for the length is given. Based on the first calculation unit, the second calculation unit that calculates the number of pixels corresponding to the length reference represented by the marker included in the image, and the number of pixels corresponding to the length reference, the crack It includes a conversion unit that converts the number of pixels corresponding to the width into a unit of length.
  • the number of pixels corresponding to the reference of the width and the length of the crack is calculated respectively, and the number of pixels is converted into the unit of length to reduce the variation due to the skill of the inspector. Appropriate crack width can be measured.
  • the marker may include at least two feature points and the distance between the two feature points may be a measure of length.
  • the length standard can be calculated by extracting the feature points from the image.
  • the sign includes at least two two-dimensional codes, and a predetermined portion of the two-dimensional code may be a feature point.
  • the length standard can be calculated more easily by using the library related to the two-dimensional code.
  • the first calculation unit may binarize the image so that the cracks can be identified, and calculate the number of pixels corresponding to the width of the cracks included in the binarized image.
  • the number of pixels corresponding to the width of the crack can be calculated more accurately.
  • the crack measurement system is a crack measurement system including a user terminal having a camera and a crack measurement device capable of communicating with the user terminal, and the crack measurement device is photographed by the camera.
  • An acquisition unit that acquires an image of a building labeled with a length reference from a user terminal, a first calculation unit that calculates the number of pixels corresponding to the width of a crack included in the image, and an image.
  • the second calculation unit that calculates the number of pixels corresponding to the length reference represented by the included label and the number of pixels corresponding to the length reference, the number of pixels corresponding to the width of the crack is calculated.
  • a conversion unit that converts into a unit of length, and a transmission unit that transmits the width of the crack expressed in the unit of length to the user terminal.
  • the number of pixels corresponding to the reference of the width and the length of the crack is calculated respectively, and the number of pixels is converted into the unit of length to reduce the variation due to the skill of the inspector. Appropriate crack width can be measured.
  • an image of a building to which a label as a reference for length is given is acquired by a calculation unit included in the crack measurement device, and the width of the crack included in the image is obtained. Based on calculating the number of pixels corresponding to, calculating the number of pixels corresponding to the length reference represented by the marker included in the image, and calculating the number of pixels corresponding to the length reference. , Converting the number of pixels corresponding to the width of the crack into units of length, and performing.
  • the number of pixels corresponding to the reference of the width and the length of the crack is calculated respectively, and the number of pixels is converted into the unit of length to reduce the variation due to the skill of the inspector. Appropriate crack width can be measured.
  • the calculation unit included in the crack measurement device is used as an acquisition unit for acquiring an image of a building labeled as a length reference, and a crack width included in the image.
  • the first calculation unit that calculates the number of pixels corresponding to the second calculation unit that calculates the number of pixels corresponding to the length reference represented by the marker included in the image, and the pixel corresponding to the length reference. Based on the number of, the number of pixels corresponding to the width of the crack is converted into a unit of length to function as a conversion unit.
  • the number of pixels corresponding to the reference of the width and the length of the crack is calculated respectively, and the number of pixels is converted into the unit of length to reduce the variation due to the skill of the inspector. Appropriate crack width can be measured.
  • FIG. 1 is a diagram showing a network configuration of the crack measurement system 100 according to the embodiment of the present invention.
  • the crack measurement system 100 includes a crack measurement device 10 and a user terminal 20, and the crack measurement device 10 and the user terminal 20 are configured to be communicable via a communication network N such as the Internet.
  • the communication network N is a wired or wireless communication network.
  • the user terminal 20 has a built-in or external camera.
  • the user terminal 20 may be composed of a general-purpose computer, for example, a smartphone or a tablet terminal.
  • the user attaches a sign described later to the building, and takes a picture of the building with the sign by the camera of the user terminal 20.
  • the captured image is transmitted to the crack measuring device 10 via the communication network N.
  • the crack measuring device 10 may be composed of a general-purpose computer, for example, a desktop computer or a laptop computer.
  • the crack measuring device 10 acquires an image from the user terminal 20, recognizes the sign and the crack as an image, and calculates the width of the crack.
  • the calculated crack width is transmitted from the crack measuring device 10 to the user terminal 20.
  • FIG. 2 is a diagram showing a functional block of the crack measuring device 10 according to the present embodiment.
  • the crack measuring device 10 includes an acquisition unit 11, a first calculation unit 12, a second calculation unit 13, a conversion unit 14, and a transmission unit 15.
  • the acquisition unit 11 acquires an image of a building with a sign that serves as a reference for the length.
  • the acquisition unit 11 may acquire the image from the user terminal 20, but may acquire the image from another computer or database.
  • the first calculation unit 12 calculates the number of pixels corresponding to the width of the crack included in the image.
  • the first calculation unit 12 may search for the maximum width of cracks included in the image and calculate the number of pixels corresponding to the maximum width.
  • the first calculation unit 12 may binarize the image so that the cracks can be identified, and calculate the number of pixels corresponding to the width of the cracks included in the binarized image.
  • the first calculation unit 12 corresponds to the width of the crack by, for example, converting the crack portion of the image into white and the portion of the image other than the crack into black and white binarization and calculating the maximum width of the white pixel.
  • the number of pixels to be used may be calculated. In this way, the number of pixels corresponding to the width of the crack can be calculated more accurately.
  • the first calculation unit 12 may calculate the number of pixels corresponding to the width of the crack included in the image by using the trained neural network. In that case, using a learning image in which the number of pixels corresponding to the width of the crack is known, supervised learning of the neural network is performed so as to calculate the number of pixels corresponding to the width of the crack, and the learning has been completed. You may generate a neural network of.
  • the second calculation unit 13 calculates the number of pixels corresponding to the reference of the length represented by the sign included in the image.
  • the sign may be a sticker affixed to the surface of the building, but may be transferred or projected onto the surface of the building.
  • the sign contains at least two feature points and the distance between the two feature points may be the measure of length.
  • the feature point may be a geometric feature point such as an intersection of edges, or a feature point representing a code such as a two-dimensional code. In this way, by using the distance between the feature points as the reference for the length, the reference for the length can be calculated by extracting the feature points from the image.
  • the sign includes at least two two-dimensional codes, and a predetermined part of the two-dimensional code may be a feature point.
  • the marker may include, for example, two two-dimensional codes, the center of the two-dimensional code as a feature point, and the distance between the centers of the two-dimensional codes as a measure of length.
  • the conversion unit 14 converts the number of pixels corresponding to the width of the crack into a unit of length based on the number of pixels corresponding to the standard of length.
  • the conversion unit 14 sets the number of pixels PX2 corresponding to the width of the crack to L ⁇ 2. Converted to a unit of length (meters in this example) by PX2 / PX1 meters.
  • the skill of the inspector is obtained by calculating the number of pixels corresponding to the reference of the width and the length of the crack and converting the number of pixels into the unit of length. It is possible to measure an appropriate crack width by reducing the variation due to the above.
  • the transmission unit 15 transmits the width of the crack expressed in units of length to the user terminal 20.
  • the transmission unit 15 may transmit the width of the crack expressed in units of length to another device. Further, the transmission unit 15 may transmit an error message to the user terminal 20 when any of the processes of the first calculation unit 12, the second calculation unit 13, and the conversion unit 14 fails. In that case, depending on the cause of the error, a guide for retrieving the image may be transmitted to the user terminal 20.
  • FIG. 3 is a diagram showing a physical configuration of the crack measuring device 10 according to the present embodiment.
  • the crack measuring device 10 includes a CPU (Central Processing Unit) 10a corresponding to a calculation unit, a RAM (Random Access Memory) 10b corresponding to a storage unit, a ROM (Read only Memory) 10c corresponding to a storage unit, and a communication unit. It has 10d, an input unit 10e, and a display unit 10f. Each of these configurations is connected to each other via a bus so that data can be transmitted and received.
  • the crack measuring device 10 is composed of one computer will be described, but the crack measuring device 10 may be realized by combining a plurality of computers.
  • the configuration shown in FIG. 3 is an example, and the crack measuring device 10 may have a configuration other than these, or may not have a part of these configurations.
  • the CPU 10a is a control unit that controls execution of a program stored in the RAM 10b or ROM 10c, calculates data, and processes data.
  • the CPU 10a is a calculation unit that executes a program (crack measurement program) for measuring the width of cracks occurring in a building.
  • the CPU 10a receives various data from the input unit 10e and the communication unit 10d, displays the calculation result of the data on the display unit 10f, and stores the data in the RAM 10b.
  • the RAM 10b is a storage unit in which data can be rewritten, and may be composed of, for example, a semiconductor storage element.
  • the RAM 10b may store data such as a program executed by the CPU 10a and an image of a building. It should be noted that these are examples, and data other than these may be stored in the RAM 10b, or a part of these may not be stored.
  • the ROM 10c is a storage unit capable of reading data, and may be composed of, for example, a semiconductor storage element.
  • the ROM 10c may store, for example, a crack measurement program or data that is not rewritten.
  • the communication unit 10d is an interface for connecting the crack measuring device 10 to another device.
  • the communication unit 10d may be connected to a communication network N such as the Internet.
  • the input unit 10e receives data input from the user, and may include, for example, a keyboard and a touch panel.
  • the display unit 10f visually displays the calculation result by the CPU 10a, and may be configured by, for example, an LCD (Liquid Crystal Display).
  • the display unit 10f may display an image of the building or display the calculated crack width.
  • the crack measurement program may be stored in a storage medium readable by a computer such as RAM 10b or ROM 10c and provided, or may be provided via a communication network connected by the communication unit 10d.
  • the CPU 10a executes the crack measuring program to realize various operations described with reference to FIG. It should be noted that these physical configurations are examples and do not necessarily have to be independent configurations.
  • the crack measuring device 10 may include an LSI (Large-Scale Integration) in which the CPU 10a and the RAM 10b or ROM 10c are integrated.
  • FIG. 4 is a diagram showing an image acquired by the crack measuring device 10 according to the present embodiment.
  • an image IMG1 taken by the user terminal 20 and acquired by the crack measuring device 10 and a binarized image IMG2 are shown.
  • Image IMG1 is an image of the wall surface of a building, and a sticker LA, which is a sign indicating the length, is affixed to the wall surface.
  • the wall surface of the building is cracked, and the image IMG1 is photographed so as to include the crack and the sticker LA.
  • the crack measuring device 10 calculates the number PX1 of pixels corresponding to the reference of the length represented by the label LA included in the image.
  • the label LA includes two two-dimensional codes, and the standard of length is the distance between the centers of the two two-dimensional codes.
  • the crack measuring device 10 calculates the number of pixels PX2 corresponding to the width of the crack based on the binarized image IMG2.
  • the crack measuring device 10 may input the binarized image IMG2 into the trained neural network to calculate the number of pixels PX2 corresponding to the width of the crack.
  • the crack measuring device 10 calculates the width of the crack by L ⁇ PX2 / PX1 meter when the standard length is L meter.
  • the standard of length can be easily calculated by utilizing the library related to the two-dimensional code.
  • FIG. 5 is a flowchart of a crack measurement process executed by the crack measurement device 10 according to the present embodiment.
  • the crack measuring device 10 acquires an image of the labeled building from, for example, the user terminal 20 (S10).
  • the crack measuring device 10 calculates the number of pixels corresponding to the width of the crack (S11), and calculates the number of pixels corresponding to the reference of the length indicated by the label (S12).
  • the crack measuring device 10 converts the number of pixels corresponding to the width of the crack into a unit of length based on the number of pixels corresponding to the reference of the length (S13).
  • the crack measuring device 10 transmits the width of the crack expressed in units of length to the user terminal 20 (S14). With the above, the crack measurement process is completed.
  • 10 ... device 10a ... CPU, 10b ... RAM, 10c ... ROM, 10d ... communication unit, 10e ... input unit, 10f ... display unit, 11 ... acquisition unit, 12 ... first calculation unit, 13 ... second calculation unit, 14 ... Conversion unit, 15 ... Transmission unit, 20 ... User terminal, 21 ... Camera, 100 ... Crack measurement system

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Abstract

Provided are a crack measuring device and so forth that allow appropriate measurement of crack widths more easily. A crack measuring device 10 comprises: an acquisition unit 11 that acquires images of a building, to which an indicator serving as a reference of length has been given; a first calculating unit 12 that calculates a count of pixels equivalent to the width of a crack included in an image; a second calculating unit 13 that calculates the count of pixels equivalent to the reference of length represented by the indicator included in the image; and a converting unit 14 that converts the count of pixels equivalent to the width of the crack into a unit of length on the basis of the count of pixels equivalent to the reference of length.

Description

クラック測定装置、クラック測定システム、クラック測定方法及びクラック測定プログラムCrack measuring device, crack measuring system, crack measuring method and crack measuring program
　本発明は、クラック測定装置、クラック測定システム、クラック測定方法及びクラック測定プログラムに関する。 The present invention relates to a crack measuring device, a crack measuring system, a crack measuring method, and a crack measuring program.
　従来、建造物に損傷が生じている場合に、その損傷が許容できるものであるか否かを評価するため、検査員が損傷の程度を測定することがある。 Conventionally, when a building is damaged, an inspector may measure the degree of damage in order to evaluate whether or not the damage is acceptable.
　建造物の損傷の評価に関して、例えば、下記特許文献１には、評価対象面に、撮影面を特定するための基準画像を投影し、基準画像を含めた評価対象面の撮影画像を取得し、撮影画像に含まれる基準画像の配置に基づいて、撮影画像に含まれる画素の解像度を算出し、評価対象面の表面状態を評価する表面評価方法が記載されている。 Regarding the evaluation of damage to a building, for example, in Patent Document 1 below, a reference image for specifying a photographing surface is projected on the evaluation target surface, and a photographed image of the evaluation target surface including the reference image is acquired. A surface evaluation method for calculating the resolution of pixels included in a captured image based on the arrangement of a reference image included in the captured image and evaluating the surface state of the surface to be evaluated is described.
特開２０１９－０５６６７９号公報Japanese Unexamined Patent Publication No. 2019-0566679
　建造物の損傷として、建造物の壁面や柱に生じるクラックが知られている。検査員は、クラックの幅を測定することで、その損傷の程度を評価することがある。しかしながら、クラックの延伸方向と直交する方向の最大幅を測定すべきところ、必ずしも適切な方向の幅が測定できなかったり、最大幅を測定できなかったりすることがあり、クラック幅の適切な測定が困難な場合がある。 As damage to buildings, cracks that occur on the walls and columns of buildings are known. The inspector may assess the extent of the damage by measuring the width of the crack. However, when the maximum width in the direction orthogonal to the stretching direction of the crack should be measured, the width in the appropriate direction may not always be measured or the maximum width may not be measured. It can be difficult.
　そこで、本発明は、クラック幅の適切な測定がより容易にできるクラック測定装置、クラック測定システム、クラック測定方法及びクラック測定プログラムを提供する。 Therefore, the present invention provides a crack measuring device, a crack measuring system, a crack measuring method, and a crack measuring program that can more easily measure the crack width appropriately.
　本発明の一態様に係るクラック測定装置は、長さの基準となる標識が付与された建造物の画像を取得する取得部と、画像に含まれるクラックの幅に相当する画素の数を算出する第１算出部と、画像に含まれる標識が表している長さの基準に相当する画素の数を算出する第２算出部と、長さの基準に相当する画素の数に基づいて、クラックの幅に相当する画素の数を、長さの単位に変換する変換部と、を備える。 The crack measuring device according to one aspect of the present invention calculates the number of pixels corresponding to the width of the crack included in the image and the acquisition unit that acquires the image of the building to which the label as a reference for the length is given. Based on the first calculation unit, the second calculation unit that calculates the number of pixels corresponding to the length reference represented by the marker included in the image, and the number of pixels corresponding to the length reference, the crack It includes a conversion unit that converts the number of pixels corresponding to the width into a unit of length.
　この態様によれば、クラックの幅及び長さの基準に相当する画素の数をそれぞれ算出し、画素の数を長さの単位に変換することで、検査員の技量によるばらつきを低減して、適切なクラック幅を測定することができる。 According to this aspect, the number of pixels corresponding to the reference of the width and the length of the crack is calculated respectively, and the number of pixels is converted into the unit of length to reduce the variation due to the skill of the inspector. Appropriate crack width can be measured.
　上記態様において、標識は、少なくとも２つの特徴点を含み、２つの特徴点の間の距離が長さの基準であってもよい。 In the above aspect, the marker may include at least two feature points and the distance between the two feature points may be a measure of length.
　この態様によれば、画像から特徴点を抽出することで、長さの基準を算出することができる。 According to this aspect, the length standard can be calculated by extracting the feature points from the image.
　上記態様において、標識は、少なくとも２つの２次元コードを含み、２次元コードの所定箇所が特徴点であってもよい。 In the above aspect, the sign includes at least two two-dimensional codes, and a predetermined portion of the two-dimensional code may be a feature point.
　この態様によれば、２次元コードに関するライブラリを援用して、長さの基準をより容易に算出することができる。 According to this aspect, the length standard can be calculated more easily by using the library related to the two-dimensional code.
　上記態様において、第１算出部は、クラックが識別可能となるように画像を２値化し、２値化した画像に含まれるクラックの幅に相当する画素の数を算出してもよい。 In the above aspect, the first calculation unit may binarize the image so that the cracks can be identified, and calculate the number of pixels corresponding to the width of the cracks included in the binarized image.
　この態様によれば、クラックの幅に相当する画素の数をより正確に算出することができる。 According to this aspect, the number of pixels corresponding to the width of the crack can be calculated more accurately.
　本発明の他の態様に係るクラック測定システムは、カメラを有するユーザ端末と、ユーザ端末と通信可能なクラック測定装置とを備えるクラック測定システムであって、クラック測定装置は、カメラにより撮影された、長さの基準となる標識が付与された建造物の画像を、ユーザ端末から取得する取得部と、画像に含まれるクラックの幅に相当する画素の数を算出する第１算出部と、画像に含まれる標識が表している長さの基準に相当する画素の数を算出する第２算出部と、長さの基準に相当する画素の数に基づいて、クラックの幅に相当する画素の数を、長さの単位に変換する変換部と、長さの単位で表されたクラックの幅を、ユーザ端末に送信する送信部と、を有する。 The crack measurement system according to another aspect of the present invention is a crack measurement system including a user terminal having a camera and a crack measurement device capable of communicating with the user terminal, and the crack measurement device is photographed by the camera. An acquisition unit that acquires an image of a building labeled with a length reference from a user terminal, a first calculation unit that calculates the number of pixels corresponding to the width of a crack included in the image, and an image. Based on the second calculation unit that calculates the number of pixels corresponding to the length reference represented by the included label and the number of pixels corresponding to the length reference, the number of pixels corresponding to the width of the crack is calculated. , A conversion unit that converts into a unit of length, and a transmission unit that transmits the width of the crack expressed in the unit of length to the user terminal.
　この態様によれば、クラックの幅及び長さの基準に相当する画素の数をそれぞれ算出し、画素の数を長さの単位に変換することで、検査員の技量によるばらつきを低減して、適切なクラック幅を測定することができる。 According to this aspect, the number of pixels corresponding to the reference of the width and the length of the crack is calculated respectively, and the number of pixels is converted into the unit of length to reduce the variation due to the skill of the inspector. Appropriate crack width can be measured.
　本発明の他の態様に係るクラック測定方法は、クラック測定装置が備える演算部により、長さの基準となる標識が付与された建造物の画像を取得することと、画像に含まれるクラックの幅に相当する画素の数を算出することと、画像に含まれる標識が表している長さの基準に相当する画素の数を算出することと、長さの基準に相当する画素の数に基づいて、クラックの幅に相当する画素の数を、長さの単位に変換することと、を実行することを含む。 In the crack measurement method according to another aspect of the present invention, an image of a building to which a label as a reference for length is given is acquired by a calculation unit included in the crack measurement device, and the width of the crack included in the image is obtained. Based on calculating the number of pixels corresponding to, calculating the number of pixels corresponding to the length reference represented by the marker included in the image, and calculating the number of pixels corresponding to the length reference. , Converting the number of pixels corresponding to the width of the crack into units of length, and performing.
　この態様によれば、クラックの幅及び長さの基準に相当する画素の数をそれぞれ算出し、画素の数を長さの単位に変換することで、検査員の技量によるばらつきを低減して、適切なクラック幅を測定することができる。 According to this aspect, the number of pixels corresponding to the reference of the width and the length of the crack is calculated respectively, and the number of pixels is converted into the unit of length to reduce the variation due to the skill of the inspector. Appropriate crack width can be measured.
　本発明の他の態様に係るクラック測定プログラムは、クラック測定装置が備える演算部を、長さの基準となる標識が付与された建造物の画像を取得する取得部、画像に含まれるクラックの幅に相当する画素の数を算出する第１算出部、画像に含まれる標識が表している長さの基準に相当する画素の数を算出する第２算出部、及び長さの基準に相当する画素の数に基づいて、クラックの幅に相当する画素の数を、長さの単位に変換する変換部、として機能させる。 In the crack measurement program according to another aspect of the present invention, the calculation unit included in the crack measurement device is used as an acquisition unit for acquiring an image of a building labeled as a length reference, and a crack width included in the image. The first calculation unit that calculates the number of pixels corresponding to, the second calculation unit that calculates the number of pixels corresponding to the length reference represented by the marker included in the image, and the pixel corresponding to the length reference. Based on the number of, the number of pixels corresponding to the width of the crack is converted into a unit of length to function as a conversion unit.
　この態様によれば、クラックの幅及び長さの基準に相当する画素の数をそれぞれ算出し、画素の数を長さの単位に変換することで、検査員の技量によるばらつきを低減して、適切なクラック幅を測定することができる。 According to this aspect, the number of pixels corresponding to the reference of the width and the length of the crack is calculated respectively, and the number of pixels is converted into the unit of length to reduce the variation due to the skill of the inspector. Appropriate crack width can be measured.
　本発明によれば、クラック幅の適切な測定がより容易にできるクラック測定装置、クラック測定システム、クラック測定方法及びクラック測定プログラムを提供することができる。 According to the present invention, it is possible to provide a crack measuring device, a crack measuring system, a crack measuring method, and a crack measuring program that can more easily measure a crack width appropriately.
本発明の実施形態に係るクラック測定システムのネットワーク構成を示す図である。It is a figure which shows the network configuration of the crack measurement system which concerns on embodiment of this invention. 本実施形態に係るクラック測定装置の機能ブロックを示す図である。It is a figure which shows the functional block of the crack measuring apparatus which concerns on this embodiment. 本実施形態に係るクラック測定装置の物理的構成を示す図である。It is a figure which shows the physical structure of the crack measuring apparatus which concerns on this embodiment. 本実施形態に係るクラック測定装置により取得される画像を示す図である。It is a figure which shows the image acquired by the crack measuring apparatus which concerns on this embodiment. 本実施形態に係るクラック測定装置により実行されるクラック測定処理のフローチャートである。It is a flowchart of the crack measurement process executed by the crack measurement apparatus which concerns on this embodiment.
　添付図面を参照して、本発明の実施形態について説明する。なお、各図において、同一の符号を付したものは、同一又は同様の構成を有する。 An embodiment of the present invention will be described with reference to the accompanying drawings. In each figure, those having the same reference numerals have the same or similar configurations.
　図１は、本発明の実施形態に係るクラック測定システム１００のネットワーク構成を示す図である。クラック測定システム１００は、クラック測定装置１０及びユーザ端末２０を備え、クラック測定装置１０及びユーザ端末２０は、インターネット等の通信ネットワークＮを介して通信可能に構成される。通信ネットワークＮは、有線又は無線の通信ネットワークである。 FIG. 1 is a diagram showing a network configuration of the crack measurement system 100 according to the embodiment of the present invention. The crack measurement system 100 includes a crack measurement device 10 and a user terminal 20, and the crack measurement device 10 and the user terminal 20 are configured to be communicable via a communication network N such as the Internet. The communication network N is a wired or wireless communication network.
　ユーザ端末２０は、内蔵又は外付けのカメラを有する。ユーザ端末２０は、汎用のコンピュータで構成されてよく、例えばスマートフォンやタブレット端末で構成されてよい。ユーザは、後述する標識を建造物に付与して、標識が付与された建造物をユーザ端末２０のカメラによって撮影する。撮影された画像は、通信ネットワークＮを介してクラック測定装置１０に送信される。 The user terminal 20 has a built-in or external camera. The user terminal 20 may be composed of a general-purpose computer, for example, a smartphone or a tablet terminal. The user attaches a sign described later to the building, and takes a picture of the building with the sign by the camera of the user terminal 20. The captured image is transmitted to the crack measuring device 10 via the communication network N.
　クラック測定装置１０は、汎用のコンピュータで構成されてよく、例えばデスクトップコンピュータやラップトップコンピュータで構成されてよい。クラック測定装置１０は、ユーザ端末２０から画像を取得し、標識及びクラックを画像認識し、クラックの幅を算出する。算出されたクラックの幅は、クラック測定装置１０からユーザ端末２０に送信される。 The crack measuring device 10 may be composed of a general-purpose computer, for example, a desktop computer or a laptop computer. The crack measuring device 10 acquires an image from the user terminal 20, recognizes the sign and the crack as an image, and calculates the width of the crack. The calculated crack width is transmitted from the crack measuring device 10 to the user terminal 20.
　図２は、本実施形態に係るクラック測定装置１０の機能ブロックを示す図である。クラック測定装置１０は、取得部１１、第１算出部１２、第２算出部１３、変換部１４及び送信部１５を備える。 FIG. 2 is a diagram showing a functional block of the crack measuring device 10 according to the present embodiment. The crack measuring device 10 includes an acquisition unit 11, a first calculation unit 12, a second calculation unit 13, a conversion unit 14, and a transmission unit 15.
　取得部１１は、長さの基準となる標識が付与された建造物の画像を取得する。取得部１１は、画像をユーザ端末２０から取得してよいが、他のコンピュータやデータベースから画像を取得してもよい。 The acquisition unit 11 acquires an image of a building with a sign that serves as a reference for the length. The acquisition unit 11 may acquire the image from the user terminal 20, but may acquire the image from another computer or database.
　第１算出部１２は、画像に含まれるクラックの幅に相当する画素の数を算出する。第１算出部１２は、画像に含まれるクラックの最大幅を探索し、最大幅に相当する画素の数を算出してよい。 The first calculation unit 12 calculates the number of pixels corresponding to the width of the crack included in the image. The first calculation unit 12 may search for the maximum width of cracks included in the image and calculate the number of pixels corresponding to the maximum width.
　第１算出部１２は、クラックが識別可能となるように画像を２値化し、２値化した画像に含まれるクラックの幅に相当する画素の数を算出してもよい。第１算出部１２は、例えば、画像のうちクラック部分を白色として、画像のうちクラック以外の部分を黒色として白黒２値化し、白色の画素の最大幅を算出することで、クラックの幅に相当する画素の数を算出してよい。このようにして、クラックの幅に相当する画素の数をより正確に算出することができる。 The first calculation unit 12 may binarize the image so that the cracks can be identified, and calculate the number of pixels corresponding to the width of the cracks included in the binarized image. The first calculation unit 12 corresponds to the width of the crack by, for example, converting the crack portion of the image into white and the portion of the image other than the crack into black and white binarization and calculating the maximum width of the white pixel. The number of pixels to be used may be calculated. In this way, the number of pixels corresponding to the width of the crack can be calculated more accurately.
　第１算出部１２は、学習済みのニューラルネットワークを用いて、画像に含まれるクラックの幅に相当する画素の数を算出してもよい。その場合、クラックの幅に相当する画素の数が既知である学習用画像を用いて、クラックの幅に相当する画素の数を算出するように、ニューラルネットワークの教師あり学習を行って、学習済みのニューラルネットワークを生成してよい。 The first calculation unit 12 may calculate the number of pixels corresponding to the width of the crack included in the image by using the trained neural network. In that case, using a learning image in which the number of pixels corresponding to the width of the crack is known, supervised learning of the neural network is performed so as to calculate the number of pixels corresponding to the width of the crack, and the learning has been completed. You may generate a neural network of.
　第２算出部１３は、画像に含まれる標識が表している長さの基準に相当する画素の数を算出する。標識は、建造物の表面に貼付されるステッカーであってよいが、建造物の表面に転写されたり、投影されたりするものであってもよい。 The second calculation unit 13 calculates the number of pixels corresponding to the reference of the length represented by the sign included in the image. The sign may be a sticker affixed to the surface of the building, but may be transferred or projected onto the surface of the building.
　標識は、少なくとも２つの特徴点を含み、２つの特徴点の間の距離が長さの基準であってよい。特徴点は、例えばエッジの交点のように幾何学的な特徴点であったり、２次元コードのように符号を表す特徴点であったりしてよい。このように、特徴点の間の距離を長さの基準とすることで、画像から特徴点を抽出することで、長さの基準を算出することができる。 The sign contains at least two feature points and the distance between the two feature points may be the measure of length. The feature point may be a geometric feature point such as an intersection of edges, or a feature point representing a code such as a two-dimensional code. In this way, by using the distance between the feature points as the reference for the length, the reference for the length can be calculated by extracting the feature points from the image.
　標識は、少なくとも２つの２次元コードを含み、２次元コードの所定箇所が特徴点であってよい。標識は、例えば、２つの２次元コードを含み、２次元コードの中央が特徴点であって、２次元コードの中央間の距離が長さの基準であってよい。標識として２次元コードを用いることで、２次元コードに関するライブラリを援用して、長さの基準をより容易に算出することができる。 The sign includes at least two two-dimensional codes, and a predetermined part of the two-dimensional code may be a feature point. The marker may include, for example, two two-dimensional codes, the center of the two-dimensional code as a feature point, and the distance between the centers of the two-dimensional codes as a measure of length. By using a two-dimensional code as a marker, the length standard can be calculated more easily by using the library related to the two-dimensional code.
　変換部１４は、長さの基準に相当する画素の数に基づいて、クラックの幅に相当する画素の数を、長さの単位に変換する。変換部１４は、標識が表している長さの基準に相当する画素の数がＰＸ１であり、長さの基準がＬメートルである場合、クラックの幅に相当する画素の数ＰＸ２を、Ｌ×ＰＸ２／ＰＸ１メートルによって長さの単位（本例ではメートル）に変換する。 The conversion unit 14 converts the number of pixels corresponding to the width of the crack into a unit of length based on the number of pixels corresponding to the standard of length. When the number of pixels corresponding to the reference of the length represented by the label is PX1 and the reference of the length is L meters, the conversion unit 14 sets the number of pixels PX2 corresponding to the width of the crack to L × 2. Converted to a unit of length (meters in this example) by PX2 / PX1 meters.
　本実施形態に係るクラック測定装置１０によれば、クラックの幅及び長さの基準に相当する画素の数をそれぞれ算出し、画素の数を長さの単位に変換することで、検査員の技量によるばらつきを低減して、適切なクラック幅を測定することができる。 According to the crack measuring device 10 according to the present embodiment, the skill of the inspector is obtained by calculating the number of pixels corresponding to the reference of the width and the length of the crack and converting the number of pixels into the unit of length. It is possible to measure an appropriate crack width by reducing the variation due to the above.
　送信部１５は、長さの単位で表されたクラックの幅を、ユーザ端末２０に送信する。なお、送信部１５は、長さの単位で表されたクラックの幅を、他の機器に送信してもよい。また、送信部１５は、第１算出部１２、第２算出部１３及び変換部１４のうちいずれかの処理が失敗した場合、エラーメッセージをユーザ端末２０に送信してもよい。その場合、エラー原因に応じて、画像を取り直すための案内をユーザ端末２０に送信してもよい。 The transmission unit 15 transmits the width of the crack expressed in units of length to the user terminal 20. The transmission unit 15 may transmit the width of the crack expressed in units of length to another device. Further, the transmission unit 15 may transmit an error message to the user terminal 20 when any of the processes of the first calculation unit 12, the second calculation unit 13, and the conversion unit 14 fails. In that case, depending on the cause of the error, a guide for retrieving the image may be transmitted to the user terminal 20.
　図３は、本実施形態に係るクラック測定装置１０の物理的構成を示す図である。クラック測定装置１０は、演算部に相当するＣＰＵ（Central Processing Unit）１０ａと、記憶部に相当するＲＡＭ（Random Access Memory）１０ｂと、記憶部に相当するＲＯＭ（Read only Memory）１０ｃと、通信部１０ｄと、入力部１０ｅと、表示部１０ｆと、を有する。これらの各構成は、バスを介して相互にデータ送受信可能に接続される。なお、本例ではクラック測定装置１０が一台のコンピュータで構成される場合について説明するが、クラック測定装置１０は、複数のコンピュータが組み合わされて実現されてもよい。また、図３で示す構成は一例であり、クラック測定装置１０はこれら以外の構成を有してもよいし、これらの構成のうち一部を有さなくてもよい。 FIG. 3 is a diagram showing a physical configuration of the crack measuring device 10 according to the present embodiment. The crack measuring device 10 includes a CPU (Central Processing Unit) 10a corresponding to a calculation unit, a RAM (Random Access Memory) 10b corresponding to a storage unit, a ROM (Read only Memory) 10c corresponding to a storage unit, and a communication unit. It has 10d, an input unit 10e, and a display unit 10f. Each of these configurations is connected to each other via a bus so that data can be transmitted and received. In this example, the case where the crack measuring device 10 is composed of one computer will be described, but the crack measuring device 10 may be realized by combining a plurality of computers. Further, the configuration shown in FIG. 3 is an example, and the crack measuring device 10 may have a configuration other than these, or may not have a part of these configurations.
　ＣＰＵ１０ａは、ＲＡＭ１０ｂ又はＲＯＭ１０ｃに記憶されたプログラムの実行に関する制御やデータの演算、加工を行う制御部である。ＣＰＵ１０ａは、建造物に生じているクラックの幅を測定するプログラム（クラック測定プログラム）を実行する演算部である。ＣＰＵ１０ａは、入力部１０ｅや通信部１０ｄから種々のデータを受け取り、データの演算結果を表示部１０ｆに表示したり、ＲＡＭ１０ｂに格納したりする。 The CPU 10a is a control unit that controls execution of a program stored in the RAM 10b or ROM 10c, calculates data, and processes data. The CPU 10a is a calculation unit that executes a program (crack measurement program) for measuring the width of cracks occurring in a building. The CPU 10a receives various data from the input unit 10e and the communication unit 10d, displays the calculation result of the data on the display unit 10f, and stores the data in the RAM 10b.
　ＲＡＭ１０ｂは、記憶部のうちデータの書き換えが可能なものであり、例えば半導体記憶素子で構成されてよい。ＲＡＭ１０ｂは、ＣＰＵ１０ａが実行するプログラム、建造物の画像といったデータを記憶してよい。なお、これらは例示であって、ＲＡＭ１０ｂには、これら以外のデータが記憶されていてもよいし、これらの一部が記憶されていなくてもよい。 The RAM 10b is a storage unit in which data can be rewritten, and may be composed of, for example, a semiconductor storage element. The RAM 10b may store data such as a program executed by the CPU 10a and an image of a building. It should be noted that these are examples, and data other than these may be stored in the RAM 10b, or a part of these may not be stored.
　ＲＯＭ１０ｃは、記憶部のうちデータの読み出しが可能なものであり、例えば半導体記憶素子で構成されてよい。ＲＯＭ１０ｃは、例えばクラック測定プログラムや、書き換えが行われないデータを記憶してよい。 The ROM 10c is a storage unit capable of reading data, and may be composed of, for example, a semiconductor storage element. The ROM 10c may store, for example, a crack measurement program or data that is not rewritten.
　通信部１０ｄは、クラック測定装置１０を他の機器に接続するインターフェースである。通信部１０ｄは、インターネット等の通信ネットワークＮに接続されてよい。 The communication unit 10d is an interface for connecting the crack measuring device 10 to another device. The communication unit 10d may be connected to a communication network N such as the Internet.
　入力部１０ｅは、ユーザからデータの入力を受け付けるものであり、例えば、キーボード及びタッチパネルを含んでよい。 The input unit 10e receives data input from the user, and may include, for example, a keyboard and a touch panel.
　表示部１０ｆは、ＣＰＵ１０ａによる演算結果を視覚的に表示するものであり、例えば、ＬＣＤ（Liquid Crystal Display）により構成されてよい。表示部１０ｆは、建造物の画像を表示したり、算出されたクラック幅を表示したりしてよい。 The display unit 10f visually displays the calculation result by the CPU 10a, and may be configured by, for example, an LCD (Liquid Crystal Display). The display unit 10f may display an image of the building or display the calculated crack width.
　クラック測定プログラムは、ＲＡＭ１０ｂやＲＯＭ１０ｃ等のコンピュータによって読み取り可能な記憶媒体に記憶されて提供されてもよいし、通信部１０ｄにより接続される通信ネットワークを介して提供されてもよい。クラック測定装置１０では、ＣＰＵ１０ａがクラック測定プログラムを実行することにより、図２を用いて説明した様々な動作が実現される。なお、これらの物理的な構成は例示であって、必ずしも独立した構成でなくてもよい。例えば、クラック測定装置１０は、ＣＰＵ１０ａとＲＡＭ１０ｂやＲＯＭ１０ｃが一体化したＬＳＩ（Large-Scale Integration）を備えていてもよい。 The crack measurement program may be stored in a storage medium readable by a computer such as RAM 10b or ROM 10c and provided, or may be provided via a communication network connected by the communication unit 10d. In the crack measuring device 10, the CPU 10a executes the crack measuring program to realize various operations described with reference to FIG. It should be noted that these physical configurations are examples and do not necessarily have to be independent configurations. For example, the crack measuring device 10 may include an LSI (Large-Scale Integration) in which the CPU 10a and the RAM 10b or ROM 10c are integrated.
　図４は、本実施形態に係るクラック測定装置１０により取得される画像を示す図である。同図では、ユーザ端末２０により撮影され、クラック測定装置１０により取得される画像ＩＭＧ１と、２値化した画像ＩＭＧ２とを示している。 FIG. 4 is a diagram showing an image acquired by the crack measuring device 10 according to the present embodiment. In the figure, an image IMG1 taken by the user terminal 20 and acquired by the crack measuring device 10 and a binarized image IMG2 are shown.
　画像ＩＭＧ１は、建造物の壁面を撮影した画像であり、当該壁面には、長さの基準となる標識であるステッカーＬＡが貼付されている。建造物の壁面にはクラックが生じており、画像ＩＭＧ１は、クラック及びステッカーＬＡを含むように撮影されている。 Image IMG1 is an image of the wall surface of a building, and a sticker LA, which is a sign indicating the length, is affixed to the wall surface. The wall surface of the building is cracked, and the image IMG1 is photographed so as to include the crack and the sticker LA.
　クラック測定装置１０は、画像に含まれる標識ＬＡが表している長さの基準に相当する画素の数ＰＸ１を算出する。本例では、標識ＬＡは、２つの２次元コードを含み、長さの基準は、２つの２次元コードの中央間の距離である。 The crack measuring device 10 calculates the number PX1 of pixels corresponding to the reference of the length represented by the label LA included in the image. In this example, the label LA includes two two-dimensional codes, and the standard of length is the distance between the centers of the two two-dimensional codes.
　クラック測定装置１０は、２値化した画像ＩＭＧ２に基づいて、クラックの幅に相当する画素の数ＰＸ２を算出する。クラック測定装置１０は、２値化した画像ＩＭＧ２を学習済みのニューラルネットワークに入力して、クラックの幅に相当する画素の数ＰＸ２を算出してよい。 The crack measuring device 10 calculates the number of pixels PX2 corresponding to the width of the crack based on the binarized image IMG2. The crack measuring device 10 may input the binarized image IMG2 into the trained neural network to calculate the number of pixels PX2 corresponding to the width of the crack.
　クラック測定装置１０は、長さの基準がＬメートルである場合、Ｌ×ＰＸ２／ＰＸ１メートルによってクラックの幅を算出する。 The crack measuring device 10 calculates the width of the crack by L × PX2 / PX1 meter when the standard length is L meter.
　本例のように、２つの２次元コードの中央間の距離を長さの基準とすることで、２次元コードに関するライブラリを活用して、長さの基準を容易に算出することができる。 As in this example, by using the distance between the centers of the two two-dimensional codes as the standard of length, the standard of length can be easily calculated by utilizing the library related to the two-dimensional code.
　図５は、本実施形態に係るクラック測定装置１０により実行されるクラック測定処理のフローチャートである。はじめに、クラック測定装置１０は、標識が付与された建造物の画像を、例えばユーザ端末２０から取得する（Ｓ１０）。 FIG. 5 is a flowchart of a crack measurement process executed by the crack measurement device 10 according to the present embodiment. First, the crack measuring device 10 acquires an image of the labeled building from, for example, the user terminal 20 (S10).
　その後、クラック測定装置１０は、クラックの幅に相当する画素の数を算出し（Ｓ１１）、標識が表している長さの基準に相当する画素の数を算出する（Ｓ１２）。 After that, the crack measuring device 10 calculates the number of pixels corresponding to the width of the crack (S11), and calculates the number of pixels corresponding to the reference of the length indicated by the label (S12).
　そして、クラック測定装置１０は、長さの基準に相当する画素の数に基づいて、クラックの幅に相当する画素の数を、長さの単位に変換する（Ｓ１３）。 Then, the crack measuring device 10 converts the number of pixels corresponding to the width of the crack into a unit of length based on the number of pixels corresponding to the reference of the length (S13).
　最後に、クラック測定装置１０は、長さの単位で表されたクラックの幅を、ユーザ端末２０に送信する（Ｓ１４）。以上により、クラック測定処理が終了する。 Finally, the crack measuring device 10 transmits the width of the crack expressed in units of length to the user terminal 20 (S14). With the above, the crack measurement process is completed.
　以上説明した実施形態は、本発明の理解を容易にするためのものであり、本発明を限定して解釈するためのものではない。実施形態が備える各要素並びにその配置、材料、条件、形状及びサイズ等は、例示したものに限定されるわけではなく適宜変更することができる。また、異なる実施形態で示した構成同士を部分的に置換し又は組み合わせることが可能である。 The embodiments described above are for facilitating the understanding of the present invention, and are not for limiting and interpreting the present invention. Each element included in the embodiment and its arrangement, material, condition, shape, size, and the like are not limited to those exemplified, and can be changed as appropriate. In addition, the configurations shown in different embodiments can be partially replaced or combined.
　１０…装置、１０ａ…ＣＰＵ、１０ｂ…ＲＡＭ、１０ｃ…ＲＯＭ、１０ｄ…通信部、１０ｅ…入力部、１０ｆ…表示部、１１…取得部、１２…第１算出部、１３…第２算出部、１４…変換部、１５…送信部、２０…ユーザ端末、２１…カメラ、１００…クラック測定システム 10 ... device, 10a ... CPU, 10b ... RAM, 10c ... ROM, 10d ... communication unit, 10e ... input unit, 10f ... display unit, 11 ... acquisition unit, 12 ... first calculation unit, 13 ... second calculation unit, 14 ... Conversion unit, 15 ... Transmission unit, 20 ... User terminal, 21 ... Camera, 100 ... Crack measurement system

Claims (7)

  1. 　長さの基準となる標識が付与された建造物の画像を取得する取得部と、
    　前記画像に含まれるクラックの幅に相当する画素の数を算出する第１算出部と、
    　前記画像に含まれる前記標識が表している前記長さの基準に相当する前記画素の数を算出する第２算出部と、
    　前記長さの基準に相当する前記画素の数に基づいて、前記クラックの幅に相当する前記画素の数を、長さの単位に変換する変換部と、
    　を備えるクラック測定装置。     An acquisition unit that acquires an image of a building with a sign that serves as a reference for length,
    The first calculation unit that calculates the number of pixels corresponding to the width of the crack included in the image, and
    A second calculation unit that calculates the number of pixels corresponding to the reference of the length represented by the sign included in the image, and
    A conversion unit that converts the number of pixels corresponding to the width of the crack into a unit of length based on the number of pixels corresponding to the reference of the length.
    A crack measuring device including.
  2. 　前記標識は、少なくとも２つの特徴点を含み、前記２つの特徴点の間の距離が前記長さの基準である、
    　請求項１に記載のクラック測定装置。     The label comprises at least two feature points and the distance between the two feature points is a measure of the length.
    The crack measuring device according to claim 1.
  3. 　前記標識は、少なくとも２つの２次元コードを含み、前記２次元コードの所定箇所が前記特徴点である、
    　請求項２に記載のクラック測定装置。     The sign includes at least two two-dimensional codes, and a predetermined portion of the two-dimensional code is the feature point.
    The crack measuring device according to claim 2.
  4. 　前記第１算出部は、前記クラックが識別可能となるように前記画像を２値化し、２値化した前記画像に含まれる前記クラックの幅に相当する前記画素の数を算出する、
    　請求項１から３のいずれか一項に記載のクラック測定装置。     The first calculation unit binarizes the image so that the cracks can be identified, and calculates the number of pixels corresponding to the width of the cracks included in the binarized image.
    The crack measuring device according to any one of claims 1 to 3.
  5. 　カメラを有するユーザ端末と、前記ユーザ端末と通信可能なクラック測定装置とを備えるクラック測定システムであって、
    　前記クラック測定装置は、
    　前記カメラにより撮影された、長さの基準となる標識が付与された建造物の画像を、前記ユーザ端末から取得する取得部と、
    　前記画像に含まれるクラックの幅に相当する画素の数を算出する第１算出部と、
    　前記画像に含まれる前記標識が表している前記長さの基準に相当する前記画素の数を算出する第２算出部と、
    　前記長さの基準に相当する前記画素の数に基づいて、前記クラックの幅に相当する前記画素の数を、長さの単位に変換する変換部と、
    　前記長さの単位で表された前記クラックの幅を、前記ユーザ端末に送信する送信部と、を有する、
    　クラック測定システム。     A crack measurement system including a user terminal having a camera and a crack measurement device capable of communicating with the user terminal.
    The crack measuring device is
    An acquisition unit that acquires an image of a building with a sign that serves as a reference for length taken by the camera from the user terminal, and
    The first calculation unit that calculates the number of pixels corresponding to the width of the crack included in the image, and
    A second calculation unit that calculates the number of pixels corresponding to the reference of the length represented by the sign included in the image, and
    A conversion unit that converts the number of pixels corresponding to the width of the crack into a unit of length based on the number of pixels corresponding to the reference of the length.
    It has a transmission unit that transmits the width of the crack expressed in units of the length to the user terminal.
    Crack measurement system.
  6. 　クラック測定装置が備える演算部により、
    　長さの基準となる標識が付与された建造物の画像を取得することと、
    　前記画像に含まれるクラックの幅に相当する画素の数を算出することと、
    　前記画像に含まれる前記標識が表している前記長さの基準に相当する前記画素の数を算出することと、
    　前記長さの基準に相当する前記画素の数に基づいて、前記クラックの幅に相当する前記画素の数を、長さの単位に変換することと、
    　を実行することを含むクラック測定方法。     By the calculation unit provided in the crack measuring device
    Obtaining an image of a building with a length reference sign,
    To calculate the number of pixels corresponding to the width of the crack included in the image,
    To calculate the number of pixels corresponding to the reference of the length represented by the sign included in the image, and
    Converting the number of pixels corresponding to the width of the crack into units of length based on the number of pixels corresponding to the reference of the length.
    A crack measurement method that involves performing.
  7. 　クラック測定装置が備える演算部を、
    　長さの基準となる標識が付与された建造物の画像を取得する取得部、
    　前記画像に含まれるクラックの幅に相当する画素の数を算出する第１算出部、
    　前記画像に含まれる前記標識が表している前記長さの基準に相当する前記画素の数を算出する第２算出部、及び
    　前記長さの基準に相当する前記画素の数に基づいて、前記クラックの幅に相当する前記画素の数を、長さの単位に変換する変換部、
    　として機能させるクラック測定プログラム。     The arithmetic unit of the crack measuring device,
    Acquisition unit that acquires an image of a building with a sign that serves as a reference for length,
    The first calculation unit, which calculates the number of pixels corresponding to the width of the crack included in the image.
    The crack is based on a second calculation unit that calculates the number of pixels corresponding to the reference of the length represented by the label included in the image, and the number of pixels corresponding to the reference of the length. A conversion unit that converts the number of pixels corresponding to the width of
    A crack measurement program that functions as.
PCT/JP2019/046765 2019-11-29 2019-11-29 Crack measuring device, crack measuring system, crack measuring method, and crack measuring program WO2021106189A1 (en)

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