JP7037250B2 - Object measuring equipment, object measuring method and object measuring system - Google Patents

Description

The present invention relates to an object measuring instrument, an object measuring method, and an object measuring system.

In the logistics industry and the like, the size of luggage is measured in the management of luggage such as cardboard boxes. For example, by measuring the size of luggage, it can be used as a guide for the amount loaded (or can be loaded) on a truck at the time of delivery, and it is also one of the judgment factors for determining the storage location of the warehouse at the time of storage. Become one.

Conventionally, in connection with the measurement of an object using a camera, a method of obtaining a positional relationship between a camera and the reference object by photographing an object (reference object) having a known dimensional shape has been proposed (Patent Document 1). reference).

Japanese Unexamined Patent Publication No. 7-159167 (paragraphs 0023 to 0028, FIG. 1)

In this way, by using the technique described in Patent Document 1, the positional relationship between the camera and the reference object can be known. Therefore, by replacing the reference object with an object whose dimensions are unknown and taking a picture, the dimensions of the object are taken. Can be calculated.
However, calculating the dimensions of an object using Patent Document 1 has a problem that two imaging steps (particularly, alignment of two objects) are troublesome and the calculation becomes complicated.

From such a viewpoint, the present invention provides an object measuring instrument, an object measuring method, and an object measuring system capable of measuring an object by a simple method.

In order to solve the above-mentioned problems, the object measuring instrument according to the present invention is an object measuring instrument used for measuring the length of the side of the object to be measured, and is an angle on one end side of the measuring side to be measured. It has a sheet shape formed corresponding to the portion, and has a plurality of covering portions that cover each surface constituting the corner portion, and the surface of each of the covering portions is formed by the object measuring instrument. It is characterized in that the brightness is different on the captured image so that the region can be discriminated on the captured image.
Other means will be described in the embodiment for carrying out the invention.

According to the present invention, an object can be measured by a simple method.

It is a schematic diagram of the object measuring system which concerns on embodiment of this invention. It is an example of an object to be measured. It is a perspective view of the object measuring instrument which concerns on embodiment of this invention, (a) shows the state seen from the front surface side, (b) shows the state seen from the back surface side. It is a block diagram of the object measuring apparatus which concerns on embodiment of this invention. It is an example of the flowchart which shows the object measuring method by the object measuring system which concerns on embodiment of this invention. It is an image diagram of the object photographing process in the object measuring method. It is a figure for demonstrating the reference line segment detection process in the object measuring method. It is a figure for demonstrating the measurement side detection process in the object measuring method. It is a perspective view of the object measuring instrument which concerns on the 1st modification, (a) shows the state seen from the front surface side, and (b) shows the state seen from the back surface side. It is a perspective view of the object measuring instrument which concerns on the 2nd modification, (a) shows the state seen from the front surface side, and (b) shows the state seen from the back surface side.

Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the drawings as appropriate. Each figure is merely schematically shown to the extent that the present invention can be fully understood. Therefore, the present invention is not limited to the illustrated examples. In each figure, common components and similar components are designated by the same reference numerals, and duplicate description thereof will be omitted.

<Structure of the object measuring system according to the embodiment>
The configuration of the object measuring system 1 according to the embodiment will be described with reference to FIG. The object measuring system 1 is a system for measuring an object to be measured by using a captured image (including a part constituting an image). The image here means digital image data. Further, the measurement means the measurement of the length of the side of the object, and the object to be measured has at least one side. The object is, for example, a polyhedron. In the following, the side of the object measured by the object measuring system 1 may be particularly referred to as a “measurement side”.

The object measuring system 1 shown in FIG. 1 includes an object measuring instrument 3 (see FIG. 3 for details) mounted so as to cover a part of the outer surface of the object 2 (see FIG. 2 for details) and an object measuring instrument 3. It is provided with an object measuring device 4 that calculates the length of the side of the object 2 by using an image of the object 2 in the state of being mounted. The dimensions of the object measuring instrument 3 are known (manufactured to the determined dimensions), and for example, the system administrator registers this information in the object measuring device 4 in advance. The object measuring device 4 measures the object 2 by comparing the size of the object measuring instrument 3 shown in the captured image with the size of the object 2. In the present embodiment, as shown in FIG. 1, a case where the lengths (length, width, height) of three orthogonal sides of an object 2 exhibiting a rectangular parallelepiped are measured will be described. The object measuring device 4 is preferably provided with an imaging means.

The object 2 to be measured will be described with reference to FIG. The object 2 in the present embodiment is, for example, a cardboard box, and the outer surface is an arbitrary single color (for example, brown). The outer surface of the object 2 may be composed of a plurality of colors. In the present embodiment, "front and back", "up and down", and "left and right" in the description of the object 2 follow the arrows in FIG. The direction is defined for convenience of explanation and does not limit the present invention.
Here, the side D ₁ where the upper surface 2a and the front surface 2b intersect is measured as the horizontal dimension of the object 2, and the side D ₂ where the upper surface 2a and the right side surface 2c intersect is measured as the vertical dimension of the object 2. As the height dimension of the object 2, the side D ₃ where the front surface 2b and the right side surface 2c intersect is measured. Therefore, the sides D ₁ , D ₂ , and D ₃ are measurement sides.
The side D ₁ is a line segment having the vertex P ₀ of the object 2 as the end point on the one end side and the vertex P ₁ as the end point on the other end side. Further, the side D ₂ is a line segment having the vertex P ₀ of the object 2 as the end point on the one end side and the vertex P ₂ as the end point on the other end side. Further, the side D ₃ is a line segment having the vertex P ₀ of the object 2 as the end point on the one end side and the vertex P ₃ as the end point on the other end side. A corner portion E ₀ composed of an upper surface 2a, a front surface 2b, and a right side surface 2c is formed on one end side of the sides D ₁ , D ₂ , and D ₃ which are measurement sides. The apex P ₀ is a measurement reference point that serves as a reference for measuring the sides D ₁ , D ₂ , and D ₃ , which are the measurement sides.

The object measuring instrument 3 will be described with reference to FIG. The object measuring instrument 3 is used for measuring an object, and is attached to a corner portion (measurement reference point) on one end side of the measurement side of the object 2 (see FIG. 2). The object measuring instrument 3 exhibits a sheet shape (including a plate shape or a cloth shape) corresponding to a corner portion on one end side of the measurement side, and covers a part of each surface constituting the corner portion on one end side of the measurement side. It has a plurality of covering parts. The object measuring instrument 3 has a size capable of covering a corner portion on one end side of the measurement side, and it is preferable that the object measuring instrument 3 is stable in a state of being attached to the object 2. The size, material, and the like of the object measuring instrument 3 are not particularly limited.
The object measuring instrument 3 in the present embodiment is formed so as to correspond to a corner portion E ₀ on one end side of the sides D ₁ , D ₂ , and D ₃ which are measurement sides, and a part of the upper surface 2a of the object 2 is formed. It has a first covering portion 31 for covering, a second covering portion 32 for covering a part of the front surface 2b of the object 2, and a third covering portion 33 for covering a part of the right side surface 2c of the object 2. The first covering portion 31, the second covering portion 32, and the third covering portion 33 are rectangular thin plate materials, for example, coated with a metal member. The apex Q ₀ where the first covering portion 31, the second covering portion 32, and the third covering portion 33 intersect is the apex P ₀ (measuring reference point) of the object 2 with the object measuring instrument 3 mounted on the object 2. ) Almost coincides with the position. Hereinafter, in the description of the object measuring instrument 3, the side facing the object 2 is referred to as a “back surface”, and the opposite side thereof is referred to as a “front surface”. Further, when the first covering portion 31, the second covering portion 32, and the third covering portion 33 are described without distinction, they may be referred to as a “covering portion 30”.

Each of the covering portions 30 can distinguish each other's regions in the photographed image, and by being photographed in a state of being attached to the object 2, the end point (measurement reference point) and the measurement side on one end side of the measurement side are taken. It plays a role of clarifying the direction of the position of the end point on the other end side of. The areas that can be distinguished from each other may be the captured image itself or the image after performing predetermined image processing. For example, the surface 31a of the first covering portion 31, the surface 32a of the second covering portion 32, and the surface 33a of the third covering portion 33 are formed in different colors. The color combination of the surface of the covering portion may be appropriately determined depending on the content of image processing and the shooting environment. The color of the surface of the covering portion 30 is preferably different from that of the object 2.
In the present embodiment, since binarization processing is performed as image processing, the difference in luminance becomes effective, and the surface 31a of the first covering portion 31 is made “black (displayed by hatching of cloth in FIG. 3A)”. The surface 32a of the second covering portion 32 is "gray (displayed by narrow hatching in FIG. 3A)", and the surface 33a of the third covering portion 33 is "white (displayed by wide hatching in FIG. 3A)". )"I have to. By controlling the exposure during shooting based on the three colors of black, gray, and white used on the surface of the covering portion 30, for example, the image recognition rate can be stabilized even during outdoor shooting with different brightness.

The side F ₁ where the first covering portion 31 and the second covering portion 32 intersect is a line segment having the vertex Q ₀ as the end point on one end side and the vertex Q ₁ as the end point on the other end side, and the first covering portion 31. It is a boundary between the "black" region of the second covering portion 32 and the "gray" region of the second covering portion 32. The side F ₁ corresponds to the side D ₁ of the object 2.
Further, the side F ₂ where the first covering portion 31 and the third covering portion 33 intersect is a line segment having the apex Q ₀ as the end point on the one end side and the apex Q ₂ as the end point on the other end side. It is a boundary between the “black” region of the portion 31 and the “white” region of the third covering portion 33. The side F ₂ corresponds to the side D ₂ of the object 2.
Further, the side F ₃ where the second covering portion 32 and the third covering portion 33 intersect is a line segment having the apex Q ₀ as the end point on the one end side and the apex Q ₃ as the end point on the other end side. It is a boundary between the “gray” region of the portion 32 and the “white” region of the third covering portion 33. The side F ₃ corresponds to the side D ₃ of the object 2.
The sides F ₁ , F ₂ , and F ₃ are reference line segments in the measurement of the length of the measurement side. Therefore, the sides F ₁ , F ₂ , and F ₃ are reference line segments.

In the present embodiment, the object 2 (see FIG. 2) to be measured exhibits a rectangular parallelepiped, so that the upper surface 2a, the front surface 2b, and the right side surface 2c are orthogonal to each other. Therefore, as described above, the upper surface 2a of the object 2 is covered with the first covering portion 31, the front surface 2b is covered with the second covering portion 32, and the right side surface 2c is covered with the third covering portion 33, for example. It is also possible to cover the front surface 2b and the right side surface 2c of the object 2 with the first covering portion 31. That is, in the present embodiment, the correspondence between the upper surface 2a, the front surface 2b, and the right side surface 2c of the object 2 and the first covering portion 31, the second covering portion 32, and the third covering portion 33 of the object measuring instrument 3 is arbitrary. Can be decided. As a result, the object measuring instrument 3 can be arranged on the object 2 in consideration of the color of the object 2 and the irradiation direction and intensity of the light at the time of shooting, which leads to an improvement in the image recognition rate. For example, when the black first covering portion 31 is arranged on a surface that is very strongly irradiated with light, it becomes difficult to distinguish the boundary between the gray second covering portion 32 and the white third covering portion 33. Further, when the black first covering portion 31 is arranged on the surface where the irradiation of light is very weak, it becomes difficult to distinguish the boundary with the object 2.

When the object measuring instrument 3 is stable in a state of being attached to the object 2, a fixing means (for example, an adhesive) for fixing the object measuring instrument 3 to the object 2 is not required, but depending on the shooting situation or the like. The object measuring instrument 3 may be fixed to the object 2 by using the fixing means. In that case, it is desirable that the fixing means is such that the object measuring instrument 3 and the object 2 can be separated after the shooting is completed.

The object measuring device 4 will be described with reference to FIG. 4 (see FIGS. 1 to 3 as appropriate). The object measuring device 4 acquires an image of the object 2 in which the object measuring instrument 3 is attached (including photography), and compares the size of the object measuring instrument 3 shown in the image with the size of the object 2. By doing so, the length of the side (measurement side) of the object 2 is calculated. The object measuring device 4 may be, for example, a portable tablet terminal or a smartphone. The object measuring device 4 includes an operation unit 41, a photographing unit 42, a display unit 43, a communication unit 44, a storage unit 45, and a control unit 46.

The operation unit 41 is, for example, a push button or a touch panel. The measurer of the object 2 operates the operation unit 41 to input various information.
The photographing unit 42 is, for example, a camera equipped with a CCD (Charge Coupled Device) image sensor or a CMOS (Complementary Metal Oxide Semiconductor) image sensor. The focus of the photographing unit 42 should be adjustable. The measurer uses the photographing unit 42 to take an image of the object 2 in a state where the object measuring instrument 3 is attached. The range of measurement error is determined by the number of pixels of the photographing unit 42, and the larger the number of pixels, the smaller the error range (the accuracy of measurement increases). Therefore, in order to improve the measurement accuracy, it is preferable to use the photographing unit 42 having a large number of pixels.
The display unit 43 is, for example, a liquid crystal display or an organic EL display. The display unit 43 displays an image captured by the photographing unit 42, a calculation result in the object measuring device 4, and the like.
The communication unit 44 is, for example, a wireless communication unit. The communication unit 44 communicates with another device (for example, a server) via an access point (not shown) installed in the surroundings.

The storage unit 45 is composed of, for example, a storage medium such as a RAM (Random Access Memory), a ROM (Read Only Memory), an HDD (Hard Disk Drive), and a flash memory. The storage unit 45 stores the dimensions of the object measuring instrument 3. The stored dimension of the object measuring instrument 3 may be within the range required for the measuring process of the object 2 described later. Further, the storage unit 45 stores the captured image captured by the photographing unit 42. A part of the information (including the captured image) stored in the storage unit 45 is stored in a device other than the object measuring device 4 (for example, a server), and the object measuring device 4 transmits the information as needed. It may be acquired via 44.

The control unit 46 is realized by, for example, a program execution process by a CPU (Central Processing Unit), a dedicated circuit, or the like. When the control unit 46 is realized by a program, the program can be stored and provided in a computer-readable recording medium (eg, CD-ROM). The program can also be provided through a network such as the Internet.

The control unit 46 compares the size of the object measuring instrument 3 with the size of the object 2 using the number of pixels (number of dots) of the captured image, and calculates the length of the side (measurement side) of the object 2 from the ratio. do. The calculation of the length of the measurement side using the captured image can be performed by various methods, and the method is not particularly limited. That is, the length of the measurement side can be calculated by widely applying the conventional comparative measurement technique. Hereinafter, an example of the processing of the control unit 46 will be described, but the processing of the control unit 46 is not limited to that described here.
The control unit 46 includes, for example, an image processing unit 46a, a reference line segment detection unit 46b, a reference line segment pixel number calculation unit 46c, a measurement side detection unit 46d, a measurement side pixel number calculation unit 46e, and a comparative measurement unit. It is equipped with 46f.

The image processing unit 46a makes it possible to discriminate each of the covering portions 30 (here, the first covering portion 31, the second covering portion 32, and the third covering portion 33) and the object 2 of the object measuring instrument 3. The image processing unit 46a binarizes the image by, for example, a threshold determination method (a combination other than white and black may be used). The image processing unit 46a may perform noise processing or the like.

The reference line segment detection unit 46b detects the reference line segment which is the boundary between the two covering portions 30. The reference line segment in the present embodiment is the side F ₁ which is the boundary between the first covering portion 31 and the second covering portion 32, and the side F ₂ which is the boundary between the first covering portion 31 and the third covering portion 33. And the _three sides F3 which are the boundaries between the second covering portion 32 and the third covering portion 33. A Cartesian coordinate system is set in the captured image, and the reference line segment is, for example, the coordinates of the end points (that is, the vertices Q ₀ , Q ₁ , Q ₂ which are the end points of the sides F ₁ , F ₂ , and F ₃ ). , Q ₃ coordinates).

The reference line segment pixel number calculation unit 46c calculates the number of pixels (dots) on the reference line segment (included in the reference line segment). In the present embodiment, the side F ₁ composed of the first covering portion 31 and the second covering portion 32, the side F ₂ composed of the first covering portion 31 and the third covering portion 33, and the second covering portion The number of pixels (number of dots) on the side F ₃ composed of 32 and the third covering portion 33 is calculated.

The measurement side detection unit 46d detects the measurement side of the object 2 to be measured. Since the object measuring instrument 3 is mounted on one end side of the measuring side, the measuring side detecting unit 46d sets the end point (measuring reference point) on the one end side of the measuring side to the apex Q ₀ (reference) of the object measuring instrument 3. Detect as the end point on one end side of the line segment). Further, the measurement side detection unit 46d detects the position of the boundary between the object 2 and the background on the extension line of the reference line segment (sides F ₁ , F ₂ , F ₃ ) as the end point on the other end side of the measurement side. In the present embodiment, the side D ₁ composed of the upper surface 2a and the front surface 2b, the side D ₂ composed of the upper surface 2a and the right side surface 2c, and the side D ₃ composed of the front surface 2b and the right side surface 2c are provided. To detect. Since the end point on one end side of the measurement side is detected as the apex Q ₀ of the object measuring instrument 3 (the end point on the one end side of the reference line segment), the apex P ₀ of the object 2 and the apex Q ₀ of the object measuring instrument 3 are detected. The distance from the object should be as close as possible (that is, the thickness of the object measuring instrument 3 should be thin).

The measurement side pixel number calculation unit 46e calculates the number of pixels (number of dots) on the measurement side (included in the measurement side) of the object 2 to be measured. In this embodiment, on the side D ₁ composed of the upper surface 2a and the front surface 2b, the side D ₂ composed of the upper surface 2a and the right side surface 2c, and the side D ₃ composed of the front surface 2b and the right side surface 2c. The number of pixels (number of dots) of each is calculated.

The comparative measuring unit 46f calculates the length of the measured side in the real space by comparing the length of the reference line segment on the captured image with the length of the measured side on the captured image. Specifically, the comparative measuring unit 46f multiplies the ratio of the number of pixels (number of dots) on the reference line segment and the number of pixels (number of dots) on the measurement side by the dimension of the object measuring instrument 3, and the measurement side. Calculate the length of. In this embodiment, the lengths of the sides D ₁ , D ₂ , and D ₃ are calculated.

<About the object measuring method by the object measuring system according to the embodiment>
An object measuring method by the object measuring system 1 according to the embodiment will be described with reference to FIG. 5 (see FIGS. 1 to 4 as appropriate). FIG. 5 is a flowchart showing an object measuring method by the object measuring system 1.
Here, the system administrator of the object measuring system 1 registers information regarding the dimensions of the object measuring instrument 3 in the object measuring device 4 in advance. As a result, information regarding the dimensions of the object measuring instrument 3 is stored in the storage unit 45 of the object measuring device 4.

(Instrument placement process (step S10))
The measurer arranges the object measuring instrument 3 at the corner E ₀ (see FIG. 2) of the object 2. Since the object measuring instrument 3 is molded corresponding to the corner portion E ₀ of the object 2, it is mounted on the outer surface of the object 2 without a gap (see FIG. 1). In the present embodiment, the correspondence between the upper surface 2a, the front surface 2b, and the right side surface 2c of the object 2 and the first covering portion 31, the second covering portion 32, and the third covering portion 33 of the object measuring instrument 3 is arbitrarily determined. Therefore, the measurer arranges the object 2 so as to cover any one of the upper surface 2a, the front surface 2b, and the right side surface 2c with the first covering portion 31. The position and orientation of the object measuring instrument 3 are determined by considering the color of the object 2 and the irradiation direction and intensity of light at the time of shooting, and the boundary between the covering portions 30 and the boundary between the covering portion 30 and the object 2. Determined to be easy to do.

(Object photographing process (step S20))
Next, the measurer operates the photographing unit 42 of the object measuring device 4 to photograph the object 2 in a state where the object measuring instrument 3 is attached. The object 2 is photographed so that the end point on the other end side of the object measuring instrument 3 and the measuring side is captured (it fits within the angle of view of the photographing unit 42). In the present embodiment, as described above, the object measuring instrument 3 is formed on the corner portion E ₀ (see FIG. 2) formed on one end side of the sides D ₁ , D ₂ , D ₃ (see FIG. 2) which are the measurement sides. As shown in FIG. 6, the measurer takes a picture so that the vertices P ₁ , P ₂ , and P ₃ , which are the end points on the other end side of the measurement side, are captured. The captured image is stored in the storage unit 45 of the object measuring device 4 and used in a subsequent step. It should be noted that the larger the object 2 is photographed, the higher the measurement accuracy is, so it is desirable to photograph the object 2 as large as possible. Further, it is desirable to shoot in a place where the color of the object 2 and the color of the background are not the same so that the object 2 can be easily recognized on the captured image.

(Object measuring step (step S30))
Next, the control unit 46 of the object measuring device 4 performs a process of measuring the object 2 reflected in the captured image (object measuring step (step S30)).
For example, first, the image processing unit 46a makes it possible to discriminate between the covering parts 30 (here, the first covering part 31, the second covering part 32, and the third covering part 33) and the object 2 of the object measuring instrument 3. Image processing is performed so as to be (step S31).

Next, the reference line segment detection unit 46b detects the reference line segment which is the boundary between the two covering portions 30 (step S32). Here, the sides F ₁ , F ₂ , and F ₃ are detected as reference line segments (see FIG. 7).
Subsequently, the reference line segment pixel number calculation unit 46c calculates the number of pixels (dots) on the reference line segment. Here, the number of pixels (number of dots) on the sides F ₁ , F ₂ , and F ₃ , which are reference line segments, is calculated (see FIG. 7).

Next, the measurement side detection unit 46d detects the measurement side of the object 2 to be measured (step S34). Here, sides D ₁ , D ₂ , and D ₃ are detected as measurement sides (see FIG. 8).
Subsequently, the measurement side pixel number calculation unit 46e calculates the number of pixels (dots) on the measurement side (step S35). Here, the number of pixels (number of dots) on the sides D ₁ , D ₂ , and D ₃ which are the measurement sides is calculated (see FIG. 8).

Next, the comparative measuring unit 46f calculates the length of the measured side in the real space by comparing the length of the reference line segment on the captured image with the length of the measured side on the captured image (step S36). For example, suppose that the size of the object measuring instrument 3 is "10 cm x 10 cm x 10 cm". Further, it is assumed that the number of dots on the side D ₁ which is the measurement side is "1000 dots" and the number of dots on the side F ₁ which is the reference line segment is "200 dots". In that case, the dimension (horizontal dimension W) of the side D ₁ can be calculated as "(1000 dots / 200 dots) x 10 cm = 50 cm". The dimension of the side D ₂ (vertical dimension L) and the dimension of the side D ₃ (height dimension H) can be calculated in the same manner.

As described above, in the object measuring system 1 according to the present embodiment, each covering portion 30 (here, the first covering portion 31, the second covering portion 32, and the third covering portion 33) of the object measuring instrument 3 is provided. , The area can be discriminated in the captured image. Therefore, by photographing the object 2 with the object measuring instrument 3 attached to the corner portion E ₀ , it becomes possible to compare the size of the object measuring instrument 3 shown in the photographed image with the size of the object 2. The length of the side (measurement side) of the object 2 can be calculated from the ratio. Therefore, the object 2 can be measured by a simple method.

[Modification example]
Although the embodiments of the present invention have been described above, the present invention is not limited to this, and can be carried out without changing the gist of the claims. A modification of the embodiment is shown below.

In the present embodiment, the first covering portion 31, the second covering portion 32, and the third covering portion 33 of the object measuring instrument 3 have the same rectangular shape. However, the first covering portion 31, the second covering portion 32, and the third covering portion 33 may have different shapes. Further, the first covering portion 31, the second covering portion 32, and the third covering portion 33 may have different sizes. Further, a part of the first covering portion 31, the second covering portion 32 and the third covering portion 33 may be painted so as to be discriminating.
Further, the shape of the covering portion 30 is not limited to a rectangle. For example, the covering portion 30 may have a triangular shape as shown in FIG. 9, or may have a shape leaving the periphery of the reference line segment as shown in FIG. FIG. 9 shows the object measuring instrument 103 according to the first modification, and FIG. 10 shows the object measuring instrument 203 according to the second modification.

Further, in the present embodiment, the case where the object measuring instrument 3 is attached to the outer surface of the object 2 and the external dimension of the object 2 is measured has been described. However, when the inside of the object 2 is hollow, the object measuring instrument 3 may be attached to the inner surface (inner corner) of the object 2 to measure the internal dimensions of the object 2. In that case, for example, the back surface side of the object measuring instrument 3 shown in FIG. 3B is painted so as to be discriminable.

The present invention is not limited to the above-described embodiment, and includes various modifications. For example, the above-described embodiment has been described in detail in order to explain the present invention in an easy-to-understand manner, and is not necessarily limited to the one including all the configurations described. Further, it is possible to replace a part of the configuration of one embodiment with the configuration of another embodiment, and it is also possible to add the configuration of another embodiment to the configuration of one embodiment. Further, it is possible to add / delete / replace a part of the configuration of each embodiment with another configuration.

Further, each of the above-mentioned configurations, functions, processing units, processing means and the like may be realized by hardware by designing a part or all of them by, for example, an integrated circuit. Further, each of the above configurations, functions, and the like may be realized by software by the processor interpreting and executing a program that realizes each function. Information such as programs, tables, and files that realize each function can be placed in a memory, a recording device such as a hard disk or SSD (Solid State Drive), or a recording medium such as an IC card, SD card, or DVD.
In addition, the control lines and information lines indicate what is considered necessary for explanation, and do not necessarily indicate all the control lines and information lines in the product. In practice, it can be considered that almost all configurations are interconnected.

1 Object measuring system 2 Object 3 Object measuring instrument 4 Object measuring device 30 Cover D ₁ , D ₂ , D ₃ sides (measurement side)
F ₁ , F ₂ , F ₃ sides (reference line segment)
E ₀ corner P ₀ vertex (measurement reference point)
Q ₀ vertex

Claims (3)

It is an object measuring instrument used to measure the length of the side of the object to be measured.
It presents a sheet shape formed corresponding to the corner on one end side of the measurement side where the measurement is performed.
It has a plurality of covering portions that cover each surface constituting the corner portion, and has a plurality of covering portions.
The surface of each of the covering portions is characterized in that the brightness is different on the captured image so that the region can be discriminated on the captured image captured by the object measuring instrument. Equipment. It is an object measuring method that measures the length of the side of the object to be measured.
An instrument placement process in which an object measuring instrument whose dimensions are known and which has a sheet shape corresponding to the corner on one end side of the measurement side to be measured is attached to the corner.
An object photographing process in which the object is photographed so that the end point on the other end side of the object measuring instrument and the measuring side is captured.
It has an object measuring step of calculating the length of the measurement side using the captured image.
The object measuring instrument has a plurality of covering portions that cover each surface constituting the corner portion.
The surface of each of the covering portions has different brightness on the captured image so that the region can be discriminated on the captured image obtained by photographing the object measuring instrument.
In the object measuring step, the length of the reference line segment, which is the boundary between the two covering portions corresponding to the measurement sides, on the captured image is compared with the length of the measurement side on the captured image. An object measuring method characterized in that the length of the measurement side in a real space is calculated. It is an object measuring system that measures the length of the side of the object to be measured.
An object measuring instrument with known dimensions and a sheet-like shape formed corresponding to the corner on one end of the measurement side for measurement.
The object measuring device is provided with an object measuring device for calculating the length of the measurement side by using a photographed image of the object in a state where the object measuring instrument is attached to the corner portion.
The object measuring instrument has a plurality of covering portions that cover each surface constituting the corner portion.
The surface of each of the covering portions has different brightness on the captured image so that the region can be discriminated on the captured image obtained by photographing the object measuring instrument.
The object measuring device is based on a comparison between the length of the reference line segment, which is the boundary between the two covering portions corresponding to the measurement sides, on the captured image and the length of the measurement side on the captured image. An object measuring system characterized in that the length of the measurement side in a real space is calculated.

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