Imaging system and evaluation system

Abstract

To provide a technology to appropriately acquire a moving image to be used for evaluating a running form in fixed-point imaging.SOLUTION: An imaging system includes: a camera for imaging a subject running along a running line; installation equipment for installing a camera directed to the direction of the running line at a position separated in the direction intersecting with the running line; and a pair of poles arranged in the front of the running line when viewed from the installed camera, which is arranged in the direction along the running line with a predetermined interval so as to define right and left ends of an imaging range of the camera so that the running movement for at least one step is captured in the moving image of the camera.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present disclosure relates to a photographing system and an evaluation system.

Background Art

[0002] In recent years, systems for evaluating a subject's running form by photographing a running form such as running or jogging and analyzing the obtained video have been developed. For example, Patent Document 1 proposes an operation state evaluation system for evaluating a subject's operation state during a competition. Specifically, the proposed system acquires a video of a subject and estimates a plurality of body feature points of the subject in the acquired video. Then, the proposed system calculates a value indicating the operation state of the subject based on the ratio between the distance on the image corresponding to a reference part determined from the plurality of estimated body feature points and a reference length, and outputs the calculated value indicating the operation state. According to the proposed system, the operation form during a competition can be analyzed by image analysis with a simple operation by the user.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The inventor of the present invention has found that the conventional system has the following problems. That is, in order to obtain a stable video that is easy to analyze, it is preferable to fix the position of the imaging device and perform fixed-point imaging of the running form of the subject (athlete). However, in order to appropriately evaluate the running form, it is required to include in the video an operation for which the running form can be analyzed. In order to capture a sufficient amount of motion, if the imaging range is widened, the image of the subject (the subject) becomes smaller and it becomes difficult to analyze the image. On the other hand, if the imaging range is narrowed to make it easier to analyze the image, there is a possibility that the operation for which the running form can be analyzed will not fit within the video. Therefore, when performing fixed-point imaging of the running form of the subject, it is difficult to adjust the balance of the distance between the subject (the subject) and the imaging device. In particular, when assuming subjects from infants to junior high school students, since there is a large difference in height among the subjects, it is difficult to adjust the balance of the distance between the subject and the imaging device. As a result, there may arise a problem that it is difficult to appropriately obtain a video used for evaluating the running form.

[0005] In one aspect, the present disclosure has been made in view of such circumstances, and an object thereof is to provide a technique for appropriately acquiring a video used for evaluating a running form by fixed-point imaging.

Means for Solving the Problems

[0006] In order to solve the above-described problems, the present disclosure employs the following configuration. Note that the following configurations can be combined as appropriate.

[0007] A running form imaging system according to one aspect of the present disclosure includes a camera for imaging a subject running along a running line, a fixture for installing the camera facing the running line at a position separated from the running line in a direction intersecting the running line, and a pair of poles arranged in front of the running line as viewed from the installed camera, the pair of poles being arranged at a predetermined interval in the direction along the running line so as to define the left and right ends of the imaging range of the camera such that at least one step of running motion is reflected in the imaging video of the camera. It is provided with a pair of poles.

[0008] In this configuration, the camera is fixedly arranged by an installation tool so as to photograph a subject traveling on the travel line from the side at a position separated from the travel line. In front of the travel line as seen from this camera, a pair of poles are arranged at a predetermined interval in the direction along the travel line. By this pair of poles, the left and right ends of the shooting range of the camera are defined so that at least one step of the running motion is reflected in the shooting video of the camera. That is, the user can create a state in which a video showing at least one step of the running motion can be obtained by a simple operation of aligning the left and right ends of the shooting range of the camera fixedly arranged at a fixed point by the installation tool with a pair of poles. If the motion of running for one step is included in the video, since the motion for one cycle of the running form including the stride can be analyzed, the running form of the subject can be evaluated. Therefore, according to this configuration, an appropriate video for evaluating the running form can be obtained by fixed-point shooting.

[0009] The imaging system according to the above aspect may further include a first measure laid across the pair of poles from the travel line in the intersecting direction, and the first measure indicating the position where the installation tool to which the camera is attached is arranged. According to this configuration, the arrangement of the camera can be simplified by using the first measure.

[0010] The imaging system according to the above aspect may further include a second measure laid in the direction along the travel line in front of the travel line and indicating the position where the pair of poles are arranged. According to this configuration, the arrangement of the pair of poles serving as an index of the shooting range of the camera can be simplified by using the second measure.

[0011] The imaging system according to the above aspect may further include one or more lighting fixtures that illuminate the shooting range of the camera on the travel line partitioned by the pair of poles. According to this configuration, it is possible to expect an improvement in measurement accuracy by brightening the image of the subject (athlete) and making it easier to perform image analysis.

[0012] Also, the embodiments of the present disclosure are not limited to the above-described imaging system. One aspect of the present disclosure may be an evaluation system including the above-described imaging system. For example, an evaluation system for a running form according to one aspect of the present disclosure may include a computer including the imaging system and a control unit according to any of the above aspects. The control unit is configured to obtain a target video captured by the camera and showing the running of the subject, analyze the running motion of the subject shown in the obtained target video, evaluate the running form of the subject, and output information indicating the evaluated result. According to this configuration, by using the appropriately obtained target video, it is possible to expect to stably evaluate the running form of a subject (athlete).

[0013] In the evaluation system according to the above aspect, evaluating the running form may include calculating an actual driving amount of a predetermined body part during running from the target video, and evaluating the quality of the running form regarding the predetermined body part according to an evaluation value obtained by dividing the calculated driving amount by the height of the subject. According to this configuration, it is possible to expect an appropriate evaluation of the running form from infants to junior high school students, excluding the bias due to growth differences.

[0014] Note that the embodiments of the present disclosure are not limited to the above system. As another aspect of the system according to each of the above aspects, one aspect of the present disclosure may be an information processing apparatus that realizes all or a part of each of the above configurations, an information processing method, a program, or a machine-readable storage medium such as a computer storing the program. A machine-readable storage medium such as a computer is a medium that stores information such as a program by an electrical, magnetic, optical, mechanical, or chemical action.

Advantages of the Invention

[0015] According to the present disclosure, in fixed-point shooting, a video suitable for evaluating a running form can be appropriately acquired.

Brief Description of the Drawings

[0016]

Figure 1

Figure 2A

Figure 2B

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Modes for Carrying Out the Invention

[0017] Hereinafter, embodiments according to one aspect of the present disclosure (hereinafter, also referred to as "the present embodiment") will be described with reference to the drawings. However, the present embodiment described below is merely an exemplification of the present disclosure in every respect. Needless to say, various improvements and modifications can be made without departing from the scope of the present disclosure. That is, in carrying out the present disclosure, a specific configuration according to the embodiment may be appropriately adopted. Note that the data appearing in the present embodiment is described in natural language, but more specifically, it is specified by a quasi-language, command, parameter, machine language, etc. that can be recognized by a computer.

[0018] §1 Application Example Figure 1 schematically shows an example of a scenario to which the present disclosure is applied. The evaluation system 1 for a running form according to the present embodiment includes a photographing system 2 and a computer 3. The photographing system 2 for a running form according to the present embodiment is used to obtain a photographed video of a subject S running on a running line RL by fixed-point photographing using a camera 20. The computer 3 according to the present embodiment is one or more computers configured to measure the running form of the subject S by analyzing the motion of the subject S using the photographed video obtained by the photographing system 2 and evaluate the running form of the subject S according to the measurement result.

[0019] Figure 2A schematically shows an example of a state of the photographing system 2 according to the present embodiment as viewed from above. Figure 2B schematically shows an example of a state of the photographing system 2 according to the present embodiment as viewed from the side (direction D1 along the running line RL). Figure 3 schematically shows an example of a photographed video (target video 50) obtained by the photographing system 2 according to the present embodiment. The photographing system 2 according to the present embodiment includes a camera 20, a mounting tool 21, and a pair of poles (221, 222). The camera 20 is used to photograph the subject S running along the running line RL. The mounting tool 21 is used to set the camera 20 facing the running line RL at a position separated from the running line RL in the direction D2 intersecting the running line RL. The pair of poles (221, 222) are arranged in front of the running line RL as viewed from the installed camera 20. The pair of poles (221, 222) are arranged at a predetermined interval in the direction D 1 along the running line RL so as to define the left and right ends of the photographing range VA of the camera 20 such that at least one step of the running motion is reflected in the photographed video of the camera 20.

[0020] That is, in the present embodiment, as illustrated in FIGS. 1, 2A, and 2B, the camera 20 is fixedly arranged by the fixture 21 so as to photograph the subject S running on the travel line RL from the side at a position separated from the travel line RL. In front of the travel line RL as viewed from the camera 20, a pair of poles (221, 222) are arranged at a predetermined interval in the direction D1 along the travel line RL. As illustrated in FIG. 3, the left and right ends of the shooting range VA of the camera 20 are defined by the pair of poles (221, 222) so that at least one step of running motion is reflected in the captured video of the camera 20. That is, the user can create a state in which a video showing at least one step of running motion can be obtained by simply adjusting the viewing angles at the left and right ends of the camera 20 fixedly arranged by the fixture 21 to the pair of poles (221, 222). If the motion of running for one step is included in the video, since the motion for one cycle of the running form including the stride can be analyzed, the running form of the subject S can be evaluated. Therefore, according to the imaging system 2 according to the present embodiment, an appropriate video for evaluating the running form can be acquired by fixed-point imaging.

[0021] On the other hand, as shown in FIGS. 1 and 3, the computer 3 according to the present embodiment acquires a target video 50 captured by the camera 20 of the imaging system 2, which is a target video 50 in which the running of the subject S is reflected. The computer 3 evaluates the running form of the subject S by analyzing the running motion of the subject S reflected in the acquired target video 50. Then, the computer 3 outputs information indicating the evaluated result. According to the computer 3 according to the present embodiment, by using the target video 50 appropriately obtained by the imaging system 2, a stable evaluation of the running form of the subject S can be expected.

[0022] [Travel line] The travel line RL defines the path along which the subject S runs. In one example, the travel line RL may be drawn in advance, such as a line formed by tape or paint in a gymnasium. In another example, the travel line RL may be drawn by an instrument such as a line marker during measurement.

[0023] The length (distance) of the travel line RL may be appropriately determined according to the embodiment. In one example, the length (distance) of the travel line RL may be determined so as to secure a length sufficient for the subject S to be able to run up to the extent that the movement of the running form of the subject S appears within the shooting range VA of the camera 20, such as, for example, 50 m or the like. For example, it is preferable that a length of about 25 m is secured from the start point of travel until entering the shooting range VA so that the subject S can be photographed when reaching the maximum speed. Accordingly, it is preferable that the travel line RL extends about 25 m from the end on the side where the subject S enters the shooting range VA (shooting range SR) of the camera 20 (when the subject S runs from left to right as in the example of FIG. 1, the left end) to the travel start point. As shown in FIGS. 1, 2A, and 2B, the travel line RL may extend both forward and backward outside the shooting range VA as long as it is drawn within the shooting range VA (shooting range SR). However, the form of the travel line RL is not limited to such an example. In the travel line RL, at least one of the front and rear portions outside the shooting range VA may be omitted.

[0024] Note that the travel line RL is preferably a straight line, but may deviate from the straight line to such an extent that the influence on the measurement can be ignored (for example, meandering, curving, etc.). Also, in the examples of FIGS. 1 and 3, the subject S is running on the travel line RL from left to right. However, the travel direction of the travel line RL is not limited to such an example. The subject S may run on the travel line RL from right to left. The travel direction of the travel line RL may be appropriately selected according to the embodiment.

[0025] [Subject] Subject S is a person who is the target of measuring the running form. Subject S may refer to an unspecified person who is the measurement target. Also, Subject S may be read as an athlete. The target range of Subject S may be appropriately determined according to the embodiment. In one example, the age range of Subject S may be set from infants to junior high school students. Infants may refer to children around 3 years old. When assuming the age of the measurement target is from infants to junior high school students, the height of Subject S may be assumed to be in the range of 1.00 m to 2.00 m. However, the age range of Subject S does not have to be limited to such an example. Subject S may include persons of high school age or older.

[0026] [In each direction] The direction D1 along the running line RL may basically be parallel to the running line RL (that is, it may be a parallel line to the running line RL). Ideally, a pair of poles (221, 222) may be arranged on a parallel line to the running line RL. However, the direction D1 along the running line RL does not have to be limited to such an example. If the left and right ends of the shooting range VA of the camera 20 are defined under the above conditions, the arrangement of the pair of poles (221, 222) may be slightly deviated from the parallel line to the running line RL. The direction D1 along the running line RL may be slightly deviated from the parallel line to the running line RL to such an extent that the influence on the measurement can be ignored.

[0027] The direction D2 intersecting the travel line RL may basically be orthogonal to the travel line RL (i.e., it may be a perpendicular line to the travel line RL). Ideally, the direction D1 along the travel line RL may be a parallel line to the travel line RL, and the direction D2 intersecting the travel line RL may be a perpendicular line to the travel line RL. In this case, in the direction D1 along the travel line RL, a pair of poles (221, 222) may be arranged in parallel, and the camera 20 may be arranged at the center of the pair of poles (221, 222). That is, the perpendicular line drawn from the camera 20 to the travel line RL may pass through the center of the pair of poles (221, 222). Thereby, since the positions of the respective poles (221, 222) viewed from the camera 20 are symmetric left and right, it becomes easy to adjust the viewing angle of the camera 20. However, the direction D2 intersecting the travel line RL is not limited to such an example. The direction D2 intersecting the travel line RL may deviate slightly from the direction orthogonal to the direction D1 along the travel line RL to such an extent that the influence on the measurement can be ignored. In the direction D1 along the travel line RL, the camera 20 may deviate slightly from the center of the pair of poles (221, 222). The arrangement of the camera 20 may be adjusted as appropriate. Hereinafter, for convenience of explanation, the direction D1 along the travel line RL is also referred to as the "line direction", and the direction D2 intersecting the travel line RL is also referred to as the "intersecting direction".

[0028] [Camera] If it is possible to capture moving image data in an image format for measuring the running form of the subject S, the type of the camera 20 is not particularly limited and may be appropriately selected according to the embodiment. The camera 20 may include, for example, a general RGB camera, a depth camera, an infrared camera, etc. A dedicated camera such as a single-lens reflex camera or a web camera may be used for the camera 20, or a camera attached to a terminal such as a camera attached to a smartphone or a camera attached to a tablet terminal may be used.

[0029] [Installer] The installation tool 21 is configured to install the camera 20 at a fixed point facing the driving line RL. With such a configuration, the type of the installation tool 21 does not need to be particularly limited and may be appropriately selected according to the embodiment. In one example, the installation tool 21 may be configured as a dedicated tool, or may be configured by a general-purpose camera mount such as a monopod or a tripod, for example.

[0030] [pole] Each pole (221, 222) may define the left and right ends of the shooting range VA of the camera 20 and its configuration and shape may be appropriately determined according to the embodiment. The left and right ends of the shooting range VA of the camera 20 correspond to the horizontal width of the shooting video (target video 50) obtained by the camera 20. In one example, as shown in FIG. 3, in order to suppress the range in which each pole (221, 222) appears in the shooting video, the shape of each pole (221, 222) is preferably rod-shaped. However, as long as the left and right ends of the shooting range VA are indicated and the influence on the measurement can be ignored, the shape of each pole (221, 222) does not have to be rod-shaped. Each pole (221, 222) may include, for example, a triangular cone, a pole cone, a pylon, or any other pole.

[0031] In the examples of FIGS. 2A and 3, the outer end sides of each pole (221, 222) define the left and right ends of the shooting range VA (shooting range SR). Thereby, while confirming that each pole (221, 222) appears in the captured video (that is, visually recognizing each pole (221, 222) as an indicator), the angle of view of the camera 20 can be adjusted. Therefore, the adjustment of the angle of view of the camera 20 becomes easy. However, the method of defining the shooting range VA (shooting range SR) by each pole (221, 222) is not limited to such an example and may be appropriately determined according to the embodiment. In another example, the left and right ends of the shooting range VA (shooting range SR) may be defined by the inner end sides of each pole (221, 222), or may be defined by any other part of each pole (221, 222). In still another example, reference lines may be provided on the side surfaces of each pole (221, 222), and the left and right ends of the shooting range VA (shooting range SR) may be defined by the reference lines of each pole (221, 222).

[0032] [Each distance] (Distance between pole and driving line) The pair of poles (221, 222) are arranged in front of the driving line RL as viewed from the camera 20. That is, in the crossing direction D2, the pair of poles (221, 222) are arranged at positions closer to the driving line RL. In the example of FIG. 2A, the length L1 is the distance of the shooting range SR on the driving line RL of the camera 20 in the line direction D1. The length R1 is the distance between the pair of poles (221, 222) in the line direction D1 (that is, the length of a predetermined interval). The length L2 is the distance between the pair of poles (221, 222) and the driving line RL in the crossing direction D2. In one example, the length L2 may be determined so as to be as close to the driving line RL as possible while the deviation between the length L1 and the length R1 does not become large and to be separated from the driving line RL to such an extent that it does not hinder the running of the subject S. For example, the lane width on land is defined as 1.22 m including the white line, and half of it is 0.61 m. Based on this, the length L2 may be set between 0.60 m and 1.00 m.

[0033] As the positions of the pair of poles (221, 222) approach the camera 20, the distance (length R1) between the pair of poles (221, 222) becomes shorter, and the deviation from the shooting range SR on the travel line RL becomes larger. When this deviation becomes large, the influence on the shooting range SR due to the displacement of the pair of poles (221, 222) also becomes large. That is, just a slight difference in the length R1 between the pair of poles (221, 222) causes a large variation in the length L1 of the shooting range SR. In contrast, in this embodiment, as described above, by bringing the pair of poles (221, 222) as close as possible to the travel line RL, the influence on the shooting range SR due to the displacement of the pair of poles (221, 222) can be suppressed.

[0034] (Distance of the shooting range on the travel line) The length L1 of the shooting range SR in the line direction D1 may be appropriately determined so that at least one step of the running motion is performed within this shooting range SR. One step is the walking distance from when one foot touches the ground until the other foot touches the ground. The stride is the length of one step. If the length L1 is made too long, the image of the subject S shown in the shooting video becomes small, making it difficult to perform image analysis. On the other hand, if the length L1 is made too short, there is a possibility that the motion sufficient for analyzing the running form of the subject S may not be shown in the shooting video. In order to analyze the running form including the stride, it is preferable that a complete motion of one step is shown in the shooting video.

[0035] Considering that the subject S may enter the shooting range SR during running and may exit the shooting range SR during running, in order to obtain a complete movement for one step, as the length L1 of the shooting range SR, it is sufficient that the length of two steps of the subject S is ensured. The stride of the subject S during running is about the same as the height of the subject S. The length L1 of the shooting range SR may be variably set according to the height of the subject S. However, if the length L1 of the shooting range SR is changed for each subject S, the labor of shooting will increase accordingly. Therefore, the length L1 of the shooting range SR may be fixedly determined based on the maximum height of the subject S. For example, when the maximum height of the subject S is set to 2.00 m, the length L1 of the shooting range SR may be set to 2.00 m × 2 steps = 4.00 m. Thereby, even for a subject S smaller than 2.00 m, it can be shot with a size large enough for image analysis. Note that the length L1 of the shooting range SR does not have to be limited to 4.00 m. Considering the deviation of the stride, the height of the athletes participating as the subject S, etc., the length L1 of the shooting range SR may be appropriately adjusted. Considering the above various circumstances comprehensively, the length L1 of the shooting range SR may be set, for example, between 2.00 m and 4.00 m.

[0036] (Distance between the camera and the running line) In the example of Fig. 2A, the length L3 is the distance between the running line RL and the camera 20 in the crossing direction D2. As long as a shooting video that can analyze the running form can be obtained, the length L3 does not have to be particularly limited and may be appropriately determined according to the embodiment. In one example, the length L may be appropriately determined according to the performance of the camera 20 such as the viewing angle and resolution. The length L3 from the running line RL to the camera 20 may be appropriately set according to the performance of the camera 20.

[0037] (Distance between the poles) The length R1 between a pair of poles (221, 222) (i.e., the length of a predetermined interval) is slightly shorter than the length L1 of the imaging range SR by the amount that the pair of poles (221, 222) is arranged in front of the travel line RL. In one example, the length R1 between the pair of poles (221, 222) may be appropriately determined according to the length L1 of the imaging range SR, the length L2 between the travel line RL, and the length L3 from the travel line RL to the camera 20. Thereby, the pair of poles (221, 222) can define the left and right ends of the imaging range VA (imaging range SR) of the camera 20 so that at least one step of the traveling motion is reflected in the captured video of the camera 20.

[0038] (Specific examples of each distance) As a specific example, the length L1 of the imaging range SR may be set to 4.00 m. The length L3 between the travel line RL and the camera 20 may be set to 3.25 m. The pair of poles (221, 222) may be arranged on a parallel line to the travel line RL, and the length L2 between the pair of poles (221, 222) and the travel line RL may be set to 0.64 m. Accordingly, the length R1 between the pair of poles (221, 222) may be set to 3.18 m.

[0039] [First measure] In one example, as illustrated in FIGS. 1, 2A, and 2B, the imaging system 2 may further include a first measure 23 laid across between the pair of poles (221, 222) from the travel line RL in the crossing direction D2. The first measure 23 may be configured to indicate the position where the fixture 21 to which the camera 20 is attached is arranged. Thereby, since the arrangement of the camera 20 (fixture 21) can be determined using the first measure 23 as an index, the work of arranging the camera 20 can be simplified.

[0040] In the first measure 23, the method of indicating the position where the installation tool 21 is to be arranged is not particularly limited and may be appropriately selected according to the embodiment. In one example, indicating the position where the installation tool 21 is to be arranged may be configured by directly indicating the position where the installation tool 21 is to be arranged, such as by providing a mark at the position where the installation tool 21 is to be arranged. In another example, indicating the position where the installation tool 21 is to be arranged may be configured by indirectly indicating the position where the installation tool 21 is to be arranged, such as by indicating the distance from the travel line RL (for example, at least partially marked with graduations). The first measure 23 may be appropriately configured to indicate the position where the camera 20 is to be installed within the above range.

[0041] Also, the configuration of the first measure 23 is not particularly limited and may be appropriately selected according to the embodiment. In one example, as illustrated in FIGS. 2A and 2B, the first measure 23 may be configured by a long sheet. The material of the sheet is not particularly limited and may be appropriately selected according to the embodiment. The length of the sheet may be appropriately determined to be reachable to the position where the camera 20 is to be installed. The width of the sheet is not particularly limited and may be appropriately determined according to the embodiment.

[0042] Also, the arrangement of the first measure 23 may be appropriately determined according to the embodiment. In one example, the first measure 23 may be arranged such that the end of the first measure 23 contacts the travel line RL or reaches up to beyond the travel line RL as viewed from the camera 20. In another example, the first measure 23 may be arranged in front of the travel line RL as viewed from the camera 20 such that the end of the first measure 23 is spaced apart from the travel line RL. The criterion for arranging the first measure 23 may be appropriately determined according to the embodiment.

[0043] [Second Measure] In one example, as illustrated in FIGS. 1, 2A, and 2B, the imaging system 2 may further include a second measure 24 laid along the direction D1 along the driving line RL in front of the driving line RL. The second measure 24 may be configured to indicate positions where a pair of poles (221, 222) are to be arranged. Thereby, since the arrangement of the pair of poles (221, 222) can be determined using the second measure 24 as an index, the work of arranging the pair of poles (221, 222) can be simplified.

[0044] Note that, in the second measure 24, the method of indicating the positions where the pair of poles (221, 222) are to be arranged may not be particularly limited and may be appropriately selected according to the embodiment. In one example, indicating the positions where the pair of poles (221, 222) are to be arranged may be configured by directly indicating the positions where the respective poles (221, 222) are to be arranged, such as by providing marks at the positions where the respective poles (221, 222) are to be arranged. In another example, indicating the positions where the pair of poles (221, 222) are to be arranged may be configured by indirectly indicating the positions where the pair of poles (221, 222) are to be arranged, such as by indicating a distance (for example, at least partially marked with graduations). The second measure 24 may be appropriately configured to indicate the positions where the pair of poles (221, 222) are to be installed within the above range.

[0045] Also, the configuration of the second measure 24 may not be particularly limited and may be appropriately selected according to the embodiment. In one example, as illustrated in FIGS. 2A and 2B, the second measure 24 may be constituted by a long sheet. The material of the sheet may not be particularly limited and may be appropriately selected according to the embodiment. The length of the sheet may not be particularly limited as long as it is equal to or greater than the length R1 between the pair of poles (221, 222), and may be appropriately determined according to the embodiment. The width of the sheet may not be particularly limited and may be appropriately determined according to the embodiment.

[0046] The second measure 24 is spaced apart from the driving line RL in the intersecting direction D2 and arranged along the line direction D1 according to the arrangement of the pair of poles (221, 222). In contrast, the first The major measurement line 23 is laid from the travel line RL toward the intersection direction D2. Therefore, the first major measurement line 23 may be further configured to indicate the position where the second major measurement line 24 is laid in the intersection direction D2 (i.e., the position / length L2 point of the pair of poles (221, 222) in the intersection direction D2), and may be laid prior to the second major measurement line 24. Thereby, since the arrangement of the second major measurement line 24 can be determined using the first major measurement line 23 as an indicator, the operation of laying the second major measurement line 24 can be simplified. After laying the second major measurement line 24, the portion of the first major measurement line 23 extending from the second major measurement line 24 to the travel line RL may be bent toward the camera 20 side starting from the second major measurement line 24. Thereby, by separating the end of the first major measurement line 23 from the travel line RL, it is possible to prevent interference with the travel of the subject S.

[0047] Also, in one example, the second major measurement line 24 may be used as an indicator of the lower side of the imaging range VA (angle of view). Since the second major measurement line 24 is arranged in the vicinity of the travel line RL, by using the second major measurement line 24 as an indicator of the lower side of the imaging range VA, the angle of view of the camera 20 can be easily and appropriately adjusted to the range in which the subject S is imaged.

[0048] [Lighting device] In one example, as illustrated in FIGS. 1, 2A, and 2B, the imaging system 2 may further include one or more lighting devices that illuminate the imaging range SR of the camera 20 on the travel line RL, which is demarcated by a pair of poles (221, 222). By brightening the image of the subject S in the captured video and facilitating image analysis with the lighting device, an improvement in measurement accuracy can be expected.

[0049] In the examples of each figure, the imaging system 2 includes four lighting fixtures (251, 252, 253, 254). However, the number of lighting fixtures is not limited to such examples and may be set within the range from 1 to 3, or may be 5 or more. The type of lighting fixture is not particularly limited and may be appropriately selected according to the embodiment. In one example, the lighting fixture may include LED (Light Emitting Diode) lighting or the like. When two or more lighting fixtures are provided, the types of each lighting fixture may be the same or at least partially different.

[0050] As long as the imaging range SR can be illuminated, the arrangement of the lighting fixtures is not particularly limited and may be appropriately determined according to the embodiment. Lighting fixtures that are tall, such as the lighting fixtures (251, 252) illustrated in each figure and that may obstruct the imaging of the subject S, are preferably arranged to illuminate the imaging range SR on the travel line RL from outside the imaging range VA of the camera 20 (for example, outside a pair of poles (221, 222)). On the other hand, lighting fixtures that are short, such as the lighting fixtures (253, 254), and that do not enter the imaging range VA or appear only to such an extent as not to obstruct the imaging of the subject S, may be arranged to illuminate the imaging range SR on the travel line RL inside the imaging range VA of the camera 20 (for example, inside a pair of poles (221, 222)). However, the arrangement of the lighting fixtures is not limited to such examples and may be appropriately determined according to the embodiment. Such short lighting fixtures may also be arranged to illuminate the imaging range SR on the travel line RL from outside the imaging range VA. In the crossing direction D2, the lighting fixtures may be arranged closer to the camera 20 side than the pair of poles (221, 222), or may be arranged at a position comparable to the pair of poles (221, 222).

[0051] [Analysis of Travel Operation] The method for analyzing the running motion of the subject S shown in the target video 50 may not be particularly limited and may be appropriately selected according to the embodiment. In one example, evaluating the running form may include calculating the actual driving amount of a predetermined body part during running from the target video 50, and evaluating the quality of the running form regarding the predetermined body part according to the calculated driving amount. The calculation of the driving amount may be performed by image processing. For image processing, a trained machine learning model (artificial intelligence) may be used, or classical methods such as pattern matching may be used. Image processing may be configured by a combination of operations by a trained machine learning model and rule-based operations. It may be used.

[0052] When analyzing the motion of the subject S using a trained machine learning model, the type of machine learning model to be used may not be particularly limited and may be appropriately selected according to the embodiment. In one example, the trained machine learning model may be configured to extract the physical characteristics (e.g., joints, parts, etc.) of the subject S in each image (frame) included in the video. For such a trained machine learning model, a dedicated model may be used, or for example, a commercially available model such as vision pose of Next System may be used.

[0053] In this case, as an example of the analysis process, the computer 3 may use a trained machine learning model to extract the physical characteristics of the subject S from the image at a predetermined time point included in the target video 50, and calculate the driving amount of a predetermined body part according to the position of the extracted physical characteristics. The predetermined time point may be, for example, the time point when an event related to the running form such as the grounding phase or the takeoff phase occurs. The grounding phase refers to the moment when any foot touches the ground. The takeoff phase refers to the moment when the grounded foot leaves the ground.

[0054] When adopting this method, the predetermined time point may be specified in any way. In one example, regardless of whether it is a predetermined time point, the computer 3 uses a trained machine learning model to extract the physical characteristics of the subject S from the images at each time, and may specify the predetermined time point according to the position of the extracted physical characteristics. The computer 3 may determine whether it is a predetermined time point, for example, according to the position of a body part such as when the foot reaches the lowest position (the foot touches the ground). Then, the computer 3 may calculate the driving amount of a predetermined body part using the extraction result of the physical characteristics for the image at the specified predetermined time point. That is, after performing the extraction process of the physical characteristics, the predetermined time point may be specified. In another example, the computer 3 may use other methods such as pattern matching or other trained machine learning models to specify a predetermined time point in the target video 50, and then use a trained machine learning model to extract the physical characteristics of the subject S from the image at the specified predetermined time point. That is, after specifying the predetermined time point, the extraction process of the physical characteristics may be performed.

[0055] As another example of the analysis process, the computer 3 may use a trained machine learning model to extract physical characteristics from each image included in the target video 50 and plot the positions of the extracted physical characteristics in time series. The computer 3 may also calculate the driving amount of a predetermined body part from the time series data obtained thereby.

[0056] However, the configuration of the machine learning model does not have to be limited to such examples. In another example, the machine learning model may be configured to directly infer the driving amount of the subject S from the video. In this case, the computer 3 can obtain the inference result of the driving amount by providing the target video 50 to the trained machine learning model and executing the arithmetic processing of the trained machine learning model.

[0057] In addition, the computer 3 may analyze the running motion of the subject S in the target video 50 by image analysis using a classical method such as pattern matching. In one example, except for using a classical method for the method of extracting physical characteristics, the computer 3 may evaluate the quality of the running form in the same way as in the case of extracting physical characteristics using the above machine learning model. In addition, a known method may be adopted for the method of analyzing the running motion.

[0058] Note that the length in the video (image) and the length in the real space may be appropriately associated. As an example, in the present embodiment, the length L1 of the shooting range SR on the running line RL in the shooting video is defined by a pair of poles (221, 222). Therefore, by dividing the length L1 by the number of pixels in the left - right direction of the image, the length in the real space per pixel can be specified. For example, when the length L1 is set to 4.00 m and the resolution of the shooting video of the camera 20 is set to 1080p (1920×1080), the length in the real space per pixel can be specified to be approximately 0.21 cm (400÷1920). Considering left - right distortion and the like, this value may be appropriately corrected. The computer 3 may calculate the actual driving amount of a predetermined body part during running using the length in the real space per pixel. The length in the real space per pixel can be specified to be approximately 0.21 cm (400÷1920). Considering left - right distortion and the like, this value may be appropriately corrected. The computer 3 may calculate the actual driving amount of a predetermined body part during running using the length in the real space per pixel.

[0059] (Evaluation Method) In one example, the calculated driving amount may be directly used for the evaluation of the running form. For example, the running form can be evaluated based on the driving amounts of body parts such as the thigh height, arm swing magnitude, and stride length during running. However, there are significant growth differences from infants to junior high school students (especially from infants to elementary school students), and even among students in the same grade, there are likely to be differences in body size between those born earlier and later in the month. Therefore, if the driving amounts of body parts are evaluated in absolute values, even among students in the same grade, a gap is likely to occur between those born earlier and later in the month. For example, according to a survey by the Japan Athletics Federation in 2013, about 45% of the national tournament participants among elementary school students were born between April and June, while those born between January and March were less than 10%.

[0060] Therefore, in another example, evaluating the quality of the running form according to the calculated driving amount may be constituted by evaluating the quality of the running form regarding a predetermined body part according to the evaluation value obtained by dividing the calculated driving amount by the height of the subject S. That is, the computer 3 may evaluate the quality of the running form based on the height ratio. Thereby, it is possible to expect an appropriate evaluation of the running form from infants to junior high school students, excluding the bias due to growth differences. Note that the method of obtaining the value of the height of the subject S may not be particularly limited and may be appropriately selected according to the embodiment. In one example, the computer 3 may hold the value of the height of the subject S in advance, or may obtain it via the input of the operator.

[0061] (Evaluation Items) The predetermined body part to be evaluated may be appropriately selected according to the embodiment. In one example, the evaluation items (predetermined body parts) may include posture, foot rotation speed (pitch), thigh height, arm swing magnitude, stride length, or a combination thereof. The method of calculating the driving amount for each item may not be particularly limited and may be appropriately determined according to the embodiment.

[0062] As an example, it is desirable that the posture (body axis) is standing straight at the time when the foot touches the ground (ground contact phase). Therefore, when the target video 50 is a two-dimensional image, the computer 3 may calculate, as the value of the posture (body axis), the difference between the X coordinate of the hip or waist and the X coordinate of the ear in the image of the ground contact phase. The X axis corresponds to the left-right direction of the image (target video 50). The closer this posture value is to 0, the better the running form (better posture) may be evaluated, and the farther the posture value is from 0, the worse the running form (worse posture) may be evaluated. Note that the body parts used to calculate the posture value are not limited to such examples and may be appropriately changed according to the embodiment. In another example, the posture value may be calculated based on the difference between the X coordinate of the ankle of the grounded foot and the X coordinate of the ear in the image of the ground contact phase.

[0063] Also, the faster the rotational speed (pitch) of the foot, the more likely the hind leg reaches the front leg during the ground contact phase, so the distance between the two legs during the ground contact phase becomes shorter. Therefore, the computer 3 may calculate, as the value of the rotational speed (pitch) of the foot, the difference between the X coordinate of the front leg and the X coordinate of the hind leg in the image of the ground contact phase. The X coordinate of each leg may use the X coordinate of a feature point such as the knee. The closer this value of the rotational speed of the foot is to 0, the better the running form (faster pitch) may be evaluated, and the farther the value of the rotational speed of the foot is from 0, the worse the running form (slower pitch) may be evaluated.

[0064] Note that the front leg refers to the leg that extends forward and is usually the leg that touches the ground during the ground contact phase (the leg on the ground side), and in the takeoff phase, it is the leg opposite to the leg that is about to leave the ground (the leg that steps forward). On the other hand, the hind leg refers to the leg located behind the front leg and is usually the leg that is about to step forward to the next ground contact phase (the leg opposite to the leg on the ground side) during the ground contact phase, and in the takeoff phase, it is the leg that is about to leave the ground (the leg on the ground side in the ground contact phase immediately before the takeoff phase).

[0065] Also, in the takeoff phase, the higher the thigh height, the smaller the angle between the line connecting the hip and the knee and the horizontal line of the hip, and the lower the thigh height, the larger the angle. Therefore, the computer 3 may calculate the angle between the line connecting the hip and the knee and the horizontal line of the hip from the XY coordinates of the hip and the XY coordinates of the knee of the front leg in the takeoff-phase image using trigonometric functions as the value of the thigh height. The Y coordinate corresponds to the vertical direction of the image (target video 50). The closer the value of this thigh height is to 0, the better the running form (higher thigh height) may be evaluated, and the farther the value of the thigh height is from 0, the worse the running form (lower thigh height) may be evaluated.

[0066] Note that it may be appropriately specified whether it is the front leg or the rear leg. As an example, when the X coordinate scale is set from left to right and the subject S also runs from left to right, the value of the X coordinate of the front leg becomes larger than the X coordinate of the rear leg. Therefore, the computer 3 may specify the XY coordinates of the knee of the front leg by adopting the larger value of the X coordinates among the XY coordinates of the two knees. Also, the method of calculating the thigh height does not have to be limited to such an example. In another example, the computer 3 may use the Y coordinate of the knee or thigh of the front leg as the value of the thigh height as it is. Alternatively, the value of the thigh height may be calculated by the difference between the Y coordinate of the knee or thigh of the front leg and the Y coordinate of the foot in contact with the ground (the one with the smaller Y coordinate value among the two feet). In these cases, the larger the calculated value, the higher the thigh height may be evaluated.

[0067] Also, in the takeoff phase, the larger the swing of the arm, the closer the position of the hand of the forward arm is to the face, and the smaller the swing of the arm, the farther the position of the hand of the forward arm is from the face. Therefore, the computer 3 may calculate the difference between the Y coordinate of the face and the Y coordinate of the hand of the forward arm in the takeoff-phase image as the value of the swing of the arm. As the Y coordinate of the face, the Y coordinate of the facial feature point that serves as an index for the swing of the arm, such as the eyes, may be used. As the Y coordinate of the hand, the Y coordinate of the hand feature point, such as the wrist, may be used. The smaller the value of the swing of the arm, the better the running form (larger swing of the arm) may be evaluated, and the larger the value of the swing of the arm, the worse the running form (smaller swing of the arm) may be evaluated.

[0068] Note that whether it is the hand of the forward arm may be specified as appropriate. In one example, similar to the specification of whether it is the front leg or the rear leg, the hand of the forward arm may be specified using the X coordinate (in the case of the same conditions as above, the one with the larger X coordinate value is the hand of the forward arm). In another example, in a general running form, in the takeoff phase, the position of the forward hand is higher than the position of the other hand. Therefore, the hand of the forward arm may be specified using the Y coordinate (that is, it may be specified that the one with the larger Y coordinate value is the hand of the forward arm). Also, the method of calculating the swing of the arm is not limited to such examples. In another example, the computer 3 may use the Y coordinate of the hand of the forward arm as the value of the height of the swing of the arm as it is. Alternatively, the value of the height of the swing of the arm may be calculated by the difference between the Y coordinate of the hand of the forward arm and the Y coordinate of the foot in contact with the ground (the one with the smaller Y coordinate value among the two feet). In these cases, the larger the calculated value, the larger the swing of the arm may be evaluated.

[0069] Also, the stride is the difference between the position in the contact phase of one foot and the position in the contact phase (the next contact phase) of the other foot. Therefore, the computer 3 is in contact in the image of the contact phase The stride may be calculated by subtracting the value of the X coordinate of one foot (a single foot) from the value of the X coordinate of the grounded foot (the other foot) in the image of the next grounding phase. As the X coordinate of the foot, the X coordinate of a feature point of the foot such as an ankle may be used. Also, the grounded side in the grounding phase is the front foot. Similarly to the above, the grounded foot may be specified using the X coordinate. The larger the value of this stride, the better the running form (large stride) may be evaluated, and the smaller the value of the stride, the worse the running form (small stride) may be evaluated.

[0070] In addition, in the present embodiment, as described above, by dividing the length L1 of the shooting range SR on the running line RL by the number of pixels in the left - right direction of the image, the length in the real space per pixel can be specified. The computer 3 may calculate the driving amount in the real space by multiplying the value (excluding the angle) calculated in each of the above - mentioned evaluation items by the length in the real space per pixel. The stride may be expressed in cm units. Also, in the present embodiment, the computer 3 may evaluate the running form using the value calculated in each item as it is, or may evaluate the running form using the value (excluding the angle) after correction by the body height ratio.

[0071] §2 Configuration Example FIG. 4 schematically shows an example of the hardware configuration of the computer 3 according to the present embodiment. The computer 3 according to the present embodiment is a computer in which a control unit 31, a storage unit 32, an external interface 33, an input device 34, an output device 35, and a drive 36 are electrically connected.

[0072] The control unit 31 includes a hardware processor, a CPU (Central Processing Unit), RAM (Random Access Memory), ROM (Read Only Memory), etc., and is configured to execute information processing based on programs and various data. The control unit 31 (CPU) is an example of a processor resource.

[0073] The storage unit 32 may be constituted by, for example, a hard disk drive, a solid state drive, or the like. The storage unit 32, the RAM, and the ROM are an example of memory resources. In the present embodiment, the storage unit 32 stores various information such as the program 81. The program 81 is a program for causing the computer 3 to execute information processing related to the evaluation of the above-described driving form (FIG. 6 described later). The program 81 includes a series of instructions for the information processing.

[0074] The external interface 33 may be, for example, a USB (Universal Serial Bus) port, a dedicated port, a communication port, or the like, and is configured to be connected to an external device by wire or wirelessly. In the present embodiment, the computer 3 may be connected to the camera 20 via the external interface 33.

[0075] The input device 34 is a device for performing input such as a mouse, a keyboard, an operator, or the like. The output device 35 is a device for performing output such as a display, a speaker, or the like. The input device 34 and the output device 35 may be integrally configured by, for example, a touch panel display or the like. At least one of the input device 34 and the output device 35 may be connected via the external interface 33.

[0076] The drive 36 is a device for reading various information such as a program stored in the storage medium 91. The above program 81 may be stored in the storage medium 91 instead of or together with the storage unit 32. The storage medium 91 is configured to store the information by an electrical, magnetic, optical, mechanical, or chemical action so that a machine such as a computer can read various information (stored programs, etc.). The computer 3 may acquire the program 81 from the storage medium 91. Note that the storage medium 91 may be a disk-type storage medium such as a CD, a DVD, or the like, or may be a storage medium other than a disk type such as a semiconductor memory (for example, a flash memory ) or the like. The drive 36 may be connected via the external interface 33.

[0077] Regarding the specific hardware configuration of the computer 3, depending on the embodiment, components can be appropriately omitted, replaced, or added. For example, the control unit 31 may include a plurality of hardware processors. The hardware processor may be configured by a microprocessor, FPGA (field-programmable gate array), DSP (digital signal processor), GP U (Graphics Processing Unit), ASIC (application specific integrated circuit), etc. The storage unit 32 may be composed of the RAM and ROM included in the control unit 31 and may also be configured in other ways. At least one of the external interface 33, the input device 34, the output device 35, and the drive 36 may be omitted. The computer 3 may be, in addition to a computer designed specifically for the provided service, a general-purpose server device, a general-purpose PC (Personal Computer), a tablet PC, a mobile terminal including a smartphone, etc.

[0078] §3 Usage Example (Installation Method of the Imaging System) FIG. 5 is a flowchart showing an example of the installation procedure of the imaging system 2 according to this embodiment. However, the following installation procedure is only an example, and each step may be changed as much as possible. Also, regarding the following installation procedure, steps can be appropriately omitted, replaced, and added according to the embodiment.

[0079] In step S101, a running line RL is prepared. An existing line such as a line in a stadium may be used as the running line RL, or the running line RL may be prepared by newly drawing a line.

[0080] In step S102, the first measure 23 is laid from the driving line RL in the intersection direction D2. In step S103, the second measure 24 is laid along the line direction D1 in front of the driving line RL as viewed from the planned installation position of the camera 20. In one example, the first measure 23 may be configured to indicate the position where the second measure 24 is to be laid. In this case, the second measure 24 may be laid with the first measure 23 as an indicator. Also, in one example, after laying the second measure 24, the portion of the first measure 23 extending from the second measure 24 to the driving line RL may be bent toward the camera 20 side starting from the second measure 24.

[0081] In step S104, the mounting tool 21 with the camera 20 attached is arranged at the position indicated by the first measure 23. After attaching the camera 20 to the mounting tool 21, the mounting tool 21 including the camera 20 may be installed at the position indicated by the first measure 23, or after installing the mounting tool 21, the camera 20 may be attached to the mounting tool 21. The timing of attaching the camera 20 to the mounting tool 21 may be appropriately selected according to the embodiment.

[0082] In step S105, each pole (221, 222) is arranged at each position indicated by the second measure 24. In step S106, parameters such as the orientation, magnification, and field of view angle of the camera 20 are adjusted so that the pair of poles (221, 222) come to the left and right ends of the shooting range VA (shooting range SR). In one example, the parameters of the camera 20 may be adjusted so that the second measure 24 comes to the lower end of the shooting range VA. Note that each lighting fixture (251, 252, 253, 254) may be arranged at an arbitrary timing. In one example, each lighting fixture (251, 252, 253, 254) may be arranged after step S105 or step S106.

[0083] Thereby, the installation of the imaging system 2 is completed. After the installation is completed, the user may give a driving instruction to the subject S at an arbitrary timing and start shooting the driving operation of the subject S.

[0084] (Processing procedure of the evaluation system) FIG. 6 is a flowchart showing an example of the processing procedure of the evaluation system 1 (computer 3) according to the present embodiment. The control unit 31 of the computer 3 executes the instructions included in the program 81 by the CPU. As a result, the computer 3 operates as a computer capable of executing the following information processing. The following processing procedure is an example of an evaluation method executed by a computer. However, the following processing procedure is only an example, and each step may be changed as much as possible. Further, regarding the following processing procedure, omission, substitution, and addition of steps are possible as appropriate according to the embodiment.

[0085] In step S201, the control unit 31 operates as an acquisition unit, and acquires a target video 50 captured by the camera 20, which is a target video 50 in which the running of the subject S is reflected. The path for acquiring the target video 50 may not be particularly limited, and may be appropriately selected according to the embodiment. In one example, the computer 3 may be connected to the camera 20 by wire or wirelessly via the external interface 33. The control unit 31 may directly acquire the target video 50 from the camera 20. In another example, the control unit 31 may indirectly acquire the target video 50 via the storage medium 91, an external computer, or the like.

[0086] In step S202, the control unit 31 operates as an evaluation unit, and evaluates the running form of the subject S by analyzing the running motion of the subject S reflected in the acquired target video 50. In one example, the control unit 31 may calculate the actual driving amount of a predetermined body part during running from the target video 50, and evaluate the quality of the running form according to the calculated driving amount. In one example, the control unit 31 may evaluate the quality of the running form regarding a predetermined body part according to an evaluation value obtained by dividing the calculated driving amount by the height of the subject S. In one example, the evaluation items may include posture, foot rotation speed, thigh height, arm swing size, stride, or a combination thereof.

[0087] In step S203, the control unit 31 operates as an output unit and outputs information indicating the evaluated result. The output destination and the content of the information to be output may each be appropriately selected according to the embodiment. The output destination may be, for example, a RAM in the control unit 31, the output device 35, an external computer, an external storage device, a storage medium, or a combination thereof. Also, the control unit 31 may output the evaluation result of step S202 as it is, or may execute arithmetic processing such as applying a template and output the obtained information.

[0088] FIG. 7 schematically shows an example of the information 60 indicating the evaluation result according to the present embodiment. The information 60 includes six areas (601, 602, 603, 604, 605, 606) for displaying various information. In the area 601, the name of the subject S, the measurement date, and the weather are displayed. The control unit 31 may appropriately acquire the information on the name of the subject S, the measurement date, and the weather. In the area 602, images of the characteristic scenes of running (for example, the grounding scene, the takeoff scene) among the images included in the target video 50 are displayed. The control unit 31 may appropriately acquire the images of the characteristic scenes from the target video 50. In the area 603, for example, a running time such as 50 m is displayed. The control unit 31 may appropriately acquire the information on the running time.

[0089] In the areas 604 and 605, the results of the evaluation by the process of step S202 are displayed. In an example of FIG. 7, the calculation result of the stride is displayed in the area 604. In the area 605, the calculation results of the posture, the rotation speed of the foot, the thigh height, and the amplitude of the arm swing are displayed. Also, in the area 605, the name of each item, the evaluation rank, the comparison with the previous time, and the explanation are displayed. The evaluation rank may be determined from the evaluation value based on the above body length ratio. The information to be displayed as the comparison with the previous time may be generated by comparing the current evaluation result with the previous evaluation result. The control unit 31 may appropriately acquire the previous evaluation result. Also, the information to be displayed as the explanation may be determined by a template according to the evaluation rank and the result of the comparison with the previous time. The control unit 31 may appropriately acquire the information of the template. However, the display form of the evaluation result is not limited to such an example and may be appropriately changed according to the embodiment.

[0090] In area 606, the result of the comprehensive evaluation corresponding to at least any one of the items in areas 604 and 605 is displayed. The format of the result of the comprehensive evaluation may be appropriately determined according to the embodiment. In one example, the result of the comprehensive evaluation may be shown by type. For example, four types (wide stride / fast foot rotation, wide stride / slow foot rotation, narrow stride / fast foot rotation, narrow stride / slow foot rotation) may be set according to the stride and the foot rotation speed. The control unit 31 may identify the type of the subject S from the four types according to the calculation results of the stride and the foot rotation speed of the subject S, and display the identified type in area 606. In one example of FIG. 7, in area 6061, the identified type is displayed in a graph format. In area 6062, an explanation of the identified type is displayed. The explanation of the type may be given by a template. The control unit 31 may appropriately obtain the explanation of the type.

[0091] Note that the configuration of the information 60 indicating the evaluation result is not limited to the example of FIG. 7, and may be appropriately changed according to the embodiment. When the output of the information is completed, the control unit 31 ends the processing procedure of the computer 3 according to this operation example. The computer 3 may evaluate the running form of the subject S by executing the processing of steps S201 to S203 for each obtained target video 50.

[0092] [Features] In this embodiment, the left and right ends of the shooting range VA of the camera 20 are defined by a pair of poles (221, 222) arranged in step S105 so that the operation of traveling for at least one step is reflected in the shooting video of the camera 20. In step S106, the user can create a state in which a video showing the operation of traveling for at least one step can be obtained by a simple operation of adjusting the viewing angles at the left and right ends of the camera 20 arranged at a fixed point by the fixture 21 to match the pair of poles (221, 222). Therefore, according to the shooting system 2 according to this embodiment, a video used for evaluating the running form can be appropriately acquired in fixed-point shooting. Further, according to the evaluation system 1 according to this embodiment, in step S202, by using the target video 50 appropriately obtained by the shooting system 2, it is possible to expect to stably evaluate the running form of the subject S.

[0093] §4 Modification As described above, the embodiments of the present disclosure have been described in detail, but the description so far is merely an exemplification of the present disclosure in all respects. The processes and means described in the present disclosure can be freely combined and implemented as long as no technical contradiction occurs. Further, in the above embodiment, various improvements or modifications may be appropriately made. For example, the following changes are possible. In the following, the same reference numerals are used for the same components as in the above embodiment, and the description of the same points as in the above embodiment is omitted as appropriate. The following modification examples can be combined as appropriate.

[0094] In the shooting system 2 according to the above embodiment, at least any one of the first measurer 23, the second measurer 24, and the one or more lighting fixtures (251, 252, 253, 254) may be omitted.

[0095] In the above embodiment, the installation procedure of the shooting system 2 is not limited to the example in FIG. 5 and may be appropriately changed according to the embodiment. For example, the process of step S104 may be executed at an arbitrary timing after step S102 and before step S106. The process of step S104 may be executed before step S103, or It may also be executed later. The camera 20 and the installation tool 21 may be arranged at different timings. After arranging the installation tool 21 as step S104, the camera 20 may be attached to the installation tool 21 at any timing before step S106. The process of step S105 may be executed at any timing after step S103 and before step S106. The process of step S105 may be executed before step S104. When the first measure 23 is not used as an index for the position where the second measure 24 is laid, the processing order of step S102 and step S103 may be interchanged. When the first measure 23 is omitted, step S102 may be omitted. In this case, the camera 20 and the installation tool 21 may be arranged as appropriate. When the second measure 24 is omitted, step S103 may be omitted. In this case, the pair of poles (221, 222) may be arranged as appropriate. When a camera 20 with adjusted parameters is arranged, step S106 may be omitted. Alternatively, in step S106, it may be confirmed that each pole (221, 222) is located at each end of the shooting range VA (shooting range SR).

Explanation of Signs

[0096] 1…Evaluation system, 2…Shooting system, 20…Camera, 21…Installation tool, 221·222…Poles, 23…First measure, 24…Second measure, 251·252·253·254…Lighting tools, 3…Computer, 31…Control unit, 50…Target video, RL…Travel line, S…Subject (athlete)

Claims

1. A camera for photographing a subject traveling along a travel line, a fixture for installing the camera facing the travel line at a position spaced apart from the travel line in a direction intersecting the travel line, and a pair of poles arranged in front of the travel line as viewed from the installed camera, the pair of poles being arranged at a predetermined interval in the direction along the travel line so that at least one step of the traveling motion is reflected in the photographed video of the camera, and defining the left and right ends of the photographing range of the camera. Comprising: A photographing system for a traveling form.

2. A first measure laid across between the pair of poles from the travel line in the intersecting direction, further comprising a first measure indicating a position where the fixture to which the camera is attached is arranged. The photographing system according to claim 1.

3. Further comprising a second measure laid in the direction along the travel line in front of the travel line, indicating a position where the pair of poles are arranged. The photographing system according to claim 1.

4. Further comprising one or more lighting fixtures for illuminating the photographing range of the camera on the travel line, partitioned by the pair of poles. The photographing system according to claim 1.

5. The photographing system according to any one of claims 1 to 4, and A computer comprising a control unit, Comprising an evaluation system for a traveling form, The control unit is To obtain a target video photographed by the camera, which is a target video in which the traveling of the subject is reflected, By analyzing the traveling motion of the subject reflected in the obtained target video, to evaluate the traveling form of the subject, and To output information indicating the evaluated result. Configured to execute Evaluation system.

6. Evaluating the traveling form Calculating an actual driving amount of a predetermined body part during traveling from the target video, and Evaluating the quality of the traveling form regarding the predetermined body part according to an evaluation value obtained by dividing the calculated driving amount by the height of the subject. The evaluation system according to claim 5.

Images