Shooting method and camera mounting jig

Abstract

Record the detailed condition of the rower and the oars while on board. [Solution] The filming method comprises the steps of fixing a mounting jig that supports a camera to a fitting provided on the boat that the rower is rowing and through which the oars used for rowing are inserted, and filming the rower and the oars with a camera supported by the mounting jig fixed to the fitting.

Description

Technical Field

[0001] The present invention relates to a photographing method and a camera mounting jig.

Background Art

[0002] Generally, for example, in the training of a rowing boat (boat racing), the power of rowing (rowing power), timing, etc. may be measured and recorded. As a method used for such measurement, Non-Patent Document 1 discloses a system that measures the force applied to the sole of a rower's foot as rowing power using a pressure sensor and analyzes and evaluates it.

Prior Art Documents

Non-Patent Documents

[0003]

Non-Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, there is a problem that it is difficult to grasp the movements of the rower and the oar in detail and objectively while rowing. That is, for example, since the above system is a method of measuring rowing power using a pressure sensor, it cannot record the detailed states of the rower and the oar, and data for objectively evaluating the skills of the rower cannot be obtained.

[0005] The problem to be solved by the present invention is to provide a photographing method and a camera mounting jig that can record the detailed states of the rower and the oar while rowing. [Means for solving the problem]

[0006] The present invention provides a photographic method comprising the steps of fixing a mounting jig that supports a camera to a fitting provided on a boat rowed by a rower through which an oar used for rowing is inserted, and photographing the rower and the oar with a camera supported by the mounting jig fixed to the fitting.

[0007] The mounting jig according to the present invention comprises a fixing part that is fixed to a fitting provided on a boat rowed by a rower, through which an oar used for rowing is inserted, and a support part that supports a camera for photographing the rower and the oar. [Effects of the Invention]

[0008] According to the present invention, it is possible to record the detailed condition of the rower and the oars while on board. [Brief explanation of the drawing]

[0009] [Figure 1] This is an explanatory diagram showing a schematic of a rowing boat according to one embodiment of the present disclosure. [Figure 2] This is an explanatory diagram showing the configuration around a metal fitting according to one embodiment of the present disclosure. [Figure 3] This is an explanatory diagram showing a mounting jig according to one embodiment of the present disclosure, where (a) is a front view of the mounting jig, (b) is a side view of the mounting jig, and (c) is another side view of the mounting jig. [Figure 4] This is an explanatory diagram showing an example of an image captured by a camera unit according to one embodiment of the present disclosure. [Figure 5] This is an explanatory diagram showing the range that a camera unit according to one embodiment of the present disclosure can capture, where (a) is a diagram showing a rower pushing the oar forward, (b) is a diagram showing a rower pointing the oar sideways, and (c) is a diagram showing a rower pulling the oar backward. [Modes for carrying out the invention]

[0010] An embodiment of this disclosure will be described below with reference to the attached drawings. The embodiment described below is illustrative and will not be construed as limiting.

[0011] Figure 1 shows a schematic diagram of a rowing boat according to one embodiment of the present disclosure. Rowing is realized with a rower 1, a boat 2, oars 3, and fittings 4 connected to the boat 2.

[0012] Rower 1 refers to, for example, a rower, but is not limited to that. Rower 1 operates oars 3 to row boat 2. Boat 2 refers to, for example, a boat used for rowing competitions, but is not limited to that. Oars 3 are tools used by rower 1, who is in boat 2, to generate rowing power by poking the water. The fitting 4 is called a row lock and has a hole in the center through which the oar 3 is inserted. The fitting 4 is connected to the boat 2, and when the oar 3, operated by the rower 1, is inserted through the hole, the movement of the oar 3 is transmitted as propulsion to the boat.

[0013] Next, the configuration of the area around the metal fitting 4 according to one embodiment of this disclosure will be described with reference to Figure 2. As shown in Figure 2, the fitting 4 is connected to the boat 2 by a connecting member 5, and the camera unit 7 is attached to the fitting 4 by a mounting jig 6.

[0014] The connecting member 5 is a rod-shaped member that is inserted into and fixed to the boat 2. By being inserted through one end of the fitting 4, the connecting member 5 is used as the pivot point to connect the fitting 4 to the boat 2 so that it can rotate. The mounting jig 6 has a fixing part that is fixed to the metal fitting 4 and is detachably mounted on the upper part of the metal fitting 4. The mounting jig 6 also has a support part 8 above it that supports the camera unit 7. The structure of the mounting jig 6 will be described in detail later. Furthermore, the mounting location of the mounting jig 6 does not necessarily have to be on the top of the fitting 4; the mounting jig 6 may also be provided on the side or below the fitting 4.

[0015] The camera unit 7 is attached to the fitting 4 via the mounting jig 6. The camera unit 7 is detachably attached to the upper part of the mounting jig 6 and photographs the state of the rowing boat. The camera unit 7 includes, for example, two cameras: a camera that photographs the front side as viewed from the rower 1 in the insertion direction in which the oar 3 passes through the insertion hole of the fitting 4, and a camera that photographs the back side as viewed from the rower 1 in the same insertion direction. In addition, the camera unit 7 may include, for example, a 360-degree camera or three or more cameras in order to photograph the state of the rowing boat over a wide range.

[0016] Next, the structure of the mounting jig 6 according to an embodiment of the present disclosure will be described while referring to FIG. 3. FIG. 3(a) shows a view of the mounting jig 6 as seen from the front, FIG. 3(b) shows a side view of one side of the mounting jig 6, and FIG. 3(c) shows a side view of the other side of the mounting jig 6.

[0017] The mounting jig 6 is formed by connecting two L-shaped members 21 and 25 that are L-shaped when viewed from the front so as to be relatively movable. On the upper surface of the L-shaped member 21, a support portion 8 for supporting the camera unit 7 is provided. On the lower portions of the L-shaped members 21 and 25, fixing portions 6a and 6b for fixing the mounting jig 6 to the fitting 4 are provided. Since the L-shaped members 21 and 25 are relatively movable, the distance between the fixing portion 6a at the lower portion of the L-shaped member 21 and the fixing portion 6b at the lower portion of the L-shaped member 25 can be appropriately adjusted, and the mounting width of the mounting jig 6 can be changed. Note that although the mounting jig 6 is formed by connecting the L-shaped members 21 and 25 so as to be movable, the mounting jig 6 may be formed by integrating the L-shaped members 21 and 25.

[0018] The lower portion of the L-shaped member 21 is a thin plate-shaped portion having a smaller thickness than the upper portion, and a rod screw 24 is fixed to this thin plate-shaped portion. The rod screw 24 passes through a movable plate 22 facing the thin plate-shaped portion, and the fitting 4 is sandwiched between the thin plate-shaped portion of the L-shaped member 21 and the movable plate 22. A nut 23 is attached at a position separated from the thin plate portion by the movable plate 22 of the rod screw 24. By tightening and loosening the nut 23 with respect to the rod screw 24, the distance between the thin plate portion and the movable plate 22 that abuts against the nut 23 can be adjusted. Thereby, the distance between the thin plate portion and the movable plate 22 can be adjusted according to the thickness of the fitting 4, and the fitting 4 can be securely clamped and the mounting jig 6 can be fixed.

[0019] Below the L-shaped member 25, a fixing portion 6b fixed to the fitting 4 is provided. The fixing portion 6b includes a pair of clamping plates 26 that clamp the fitting 4, a pair of inclined plates 27 that obliquely extend from the respective clamping plates 26, and a spring 28 that elastically connects the pair of clamping plates 26 and the inclined plates 27.

[0020] Such a fixing portion 6b is fixed to the lower end of the L-shaped member 25 via the spring 28, and the pair of clamping plates 26 and the inclined plates 27 are provided so as to face each other. Since the pair of inclined plates 27 are inclined in a direction in which they are separated from each other, when a force is applied in a direction in which these inclined plates 27 approach each other, as the inclined plates 27 approach each other, the opposing clamping plates 26 separate. In this state, the mounting jig 6 is moved to a position where the opposing clamping plates 26 clamp the fitting 4, and when the force applied to the inclined plates 27 is removed, the fitting 4 is clamped between the clamping plates 26 by the elastic force of the spring 28. In this way, the distance between the pair of clamping plates 26 can be adjusted according to the thickness of the fitting 4, and the fitting 4 can be securely clamped and the mounting jig 6 can be fixed. Note that although the pair of clamping plates 26 and the inclined plates 27 are elastically connected by the spring 28, it is not limited to this, and the main point is that the fitting 4 can be clamped.

[0021] In this way, the mounting jig 6 is formed by combining the L-shaped members 21 and 25 having the fixing portions 6a and 6b for fixing to the fitting 4. The mounting jig 6 can be attached to and detached from the fitting 4, and the mounting jig 6 can be fixed to the fitting 4. Furthermore, the mounting jig 6 has a support part 8 that supports the camera unit 7. Therefore, the camera unit 7, which films the rowing, can be attached to the fitting 4 via the mounting jig 6. As a result, the camera unit 7 is linked to the rotation of the fitting 4 with the connecting member 5 as the axis of rotation, making it possible to maintain a constant positional relationship between the camera's shooting direction and the rower 1 and oars 3.

[0022] Figure 4 shows an example of a rowing scene captured by the camera unit 7. Specifically, Figure 4 is an example of an image captured by the camera unit 7, which is equipped with two cameras: one camera that captures the front side of the oar 3 as it passes through the insertion hole of the fitting 4, and another camera that captures the back side as it passes through the insertion hole. As shown in Figure 4, the camera unit 7, attached to the fitting 4 by the mounting jig 6, can simultaneously capture an image of the rower 1 operating the oar 3 (image on the right in Figure 4) and an image of the oar 3 poking the water (image on the left in Figure 4). Therefore, it is possible to record the detailed state of the rower 1 and the oar 3 while on board the boat.

[0023] Figure 5 shows a specific example of the field of view that can be captured by the camera unit 7 attached to the metal fitting 4. As shown in Figure 5(a), when rower 1 pushes oar 3 forward, the water-side tip of oar 3 is positioned behind rower 1. In this embodiment, since the camera unit 7 is attached to a fitting 4 that changes direction in accordance with the movement of oar 3, the field of view 31a of the camera that photographs the water surface is directed behind rower 1, and the field of view 31b of the camera that photographs rower 1 is directed towards rower 1 as he moves forward. Therefore, the entire body of rower 1 and the tip of oar 3 can be photographed simultaneously.

[0024] As shown in Figure 5(b), when rower 1 points oar 3 directly to the side, the water-side tip of oar 3 is positioned directly beside rower 1. At this time, the field of view 31a of the camera filming the water surface is directed directly beside rower 1, and the field of view 31b of the camera filming rower 1 is directed towards rower 1. Therefore, it is possible to film both the entire body of rower 1 and the tip of oar 3 simultaneously.

[0025] As shown in Figure 5(c), when rower 1 pulls oar 3 backward, the water-side tip of oar 3 is positioned in front of rower 1. At this time, the field of view 31a of the camera filming the water surface is directed in front of rower 1, and the field of view 31b of the camera filming rower 1 is directed towards rower 1, who has moved backward. Therefore, it is possible to film the entire body of rower 1 and the tip of oar 3 simultaneously.

[0026] Thus, even when the positions of rower 1 and oar 3 change, the camera unit 7 is attached to a fitting 4 that changes direction in accordance with the movement of oar 3. As a result, rower 1 and oar 3 are always within the camera's field of view 31a and 31b, allowing for detailed recording of the rower 1 and oar 3's positions while in the boat. Furthermore, by adjusting the shooting direction so that oar 3 extends towards the center of field of view 31a, the positional relationship between the shooting direction and the tip of oar 3 is maintained, ensuring that even if oar 3 is displaced during rowing, an image is always captured in which oar 3 is centered.

[0027] Furthermore, when oar 3 is not poking the water, that is, when oar 3 is not submerged, oar 3 does not experience water resistance and therefore remains straight and undeformed. On the other hand, when oar 3 is poking the water, that is, when oar 3 is submerged, oar 3 bends and deforms due to water resistance. The degree of bending of oar 3 reflects the water resistance corresponding to the amount of rowing force, so it is possible to determine the amount of rowing force from the degree of bending of oar 3 in the captured image.

[0028] Furthermore, images captured by the camera unit 7 can be transmitted wirelessly to a land-based system (not shown). In this case, a predetermined program can be executed in the land-based system (not shown) to record or analyze the images captured by the camera unit 7, or to display the images captured by the camera unit 7 on a remote monitor.

[0029] As described above, the shooting method according to this embodiment includes the step of attaching a mounting jig 6 that supports the camera unit 7 to the metal fitting 4, and shooting the rowing activity with the camera unit 7. Therefore, it is possible to record the detailed condition of the rower and the oars while on board. [Explanation of Symbols]

[0030] 1 Rower 2 boats 3 All 4 metal fittings 5 Connecting members 6. Mounting jig 6a Fixed part 6b Fixed part 7 Camera Unit 8 Support part 21 L-shaped member 22 Movable plate 23 nuts 24 threaded rods 25 L-shaped member 26 Holding plate 27 Inclined board 28 Springs 31a Angle of view 31b field of view

Claims

1. A mounting jig for supporting a camera is fixed to a metal fitting that is installed in a boat rowed by a rower, through which the oars used for rowing are inserted, and which rotates in conjunction with the movement of the oars. The rower and the oar are photographed by a camera supported by a mounting jig fixed to the aforementioned fitting. A photographic method that involves a process.

2. A fitting provided on a boat rowed by a rower, comprising a fixing part through which an oar used for rowing is inserted and which is fixed to a fitting that rotates in accordance with the movement of the oar, A support unit for supporting a camera that photographs the rower and the oar, A mounting jig equipped with the following features.

Images