Method and system for projecting golf content

Abstract

According to one aspect of the present invention, the provided method for projecting golf content comprises the steps of: acquiring position information of a reference area; referring to the acquired position information of the reference area so as to determine area adjustment information corresponding to a first area to be projected; and referring to the area adjustment information so as to project golf content onto the first area.

Description

Method and system for projecting golf content

[0001] The present invention relates to a method and system for projecting golf content.

[0002] In recent years, public interest in golf has been increasing.

[0003] The most common way to enjoy golf is for users to go out to the field and play golf, but due to time and space limitations, screen golf systems that allow users to play golf at a low cost in urban areas are gaining popularity.

[0004] A screen golf system may be composed of a hitting platform configured to allow a user to make a golf swing, and a screen (e.g., a display screen) configured to visually confirm the results of the golf swing.

[0005] However, the conventional screen golf system had the problem of hindering the user's sense of immersion because golf-related content was provided only on the screen.

[0006] Accordingly, the inventor(s) of the present invention propose a technology that enables golf content to be provided in various ways and maximizes user immersion by obtaining location information of a reference area, determining area adjustment information corresponding to a first area to be projected by referring to the location information of the reference area, and projecting golf content onto the first area.

[0007] <Prior Art Literature>

[0008] Patent Document

[0009] (Patent Document 1) Patent Publication No. 10-2008-0092164 (October 15, 2008)

[0010] The purpose of the present invention is to solve all of the problems of the above-mentioned prior art.

[0011] In addition, the present invention has another purpose of obtaining location information of a reference area, determining area adjustment information corresponding to a first area to be projected by referring to the obtained location information of the reference area, and projecting golf content to the first area by referring to the area adjustment information.

[0012] In addition, another object of the present invention is to provide information about a golf shot to a user intuitively by obtaining position information of a golf ball and dynamically changing golf content projected on a first area with reference to the position information of the golf ball.

[0013] In addition, another object of the present invention is to maximize the user's sense of immersion by projecting golf content onto the first area.

[0014] A representative configuration of the present invention to achieve the above purpose is as follows.

[0015] According to one aspect of the present invention, a method is provided, comprising the steps of: obtaining location information of a reference area; determining area adjustment information corresponding to a first area to be projected by referring to the obtained location information of the reference area; and projecting golf content to the first area by referring to the area adjustment information.

[0016] According to another aspect of the present invention, a system is provided, including an information acquisition unit that acquires location information of a reference area, an area adjustment information determination unit that determines area adjustment information corresponding to a first area to be projected with reference to the acquired location information of the reference area, and a content projection unit that projects golf content on the first area with reference to the area adjustment information.

[0017] In addition, a non-transitory computer-readable recording medium recording another method for implementing the present invention, another system, and a computer program for executing the method are further provided.

[0018] According to the present invention, it is possible to obtain location information of a reference area, determine area adjustment information corresponding to a first area to be projected by referring to the obtained location information of the reference area, and project golf content to the first area by referring to the area adjustment information.

[0019] In addition, according to the present invention, information about a golf shot can be intuitively provided to a user by obtaining position information of a golf ball and dynamically changing golf content projected on a first area with reference to the position information of the golf ball.

[0020] In addition, according to the present invention, the user's sense of immersion can be maximized by projecting golf content onto the first area.

[0021] FIG. 1 is a drawing schematically showing the configuration of an entire system for projecting golf content according to one embodiment of the present invention.

[0022] FIG. 2 is a drawing detailing the internal configuration of a golf content management system according to one embodiment of the present invention.

[0023] FIG. 3 is a diagram exemplarily illustrating a process of determining area adjustment information corresponding to a first area that is a projection target according to one embodiment of the present invention.

[0024] FIG. 4 is a diagram exemplarily illustrating a process of determining a second area for obtaining position information of a golf ball according to one embodiment of the present invention.

[0025] FIG. 5 is a drawing exemplarily showing a situation in which golf content is projected onto a first area that is a projection target according to one embodiment of the present invention.

[0026] <Explanation of symbols>

[0027] 100: Communications network

[0028] 200: Golf Content Management System

[0029] 210: Information Acquisition Department

[0030] 220: Area Adjustment Information Decision Unit

[0031] 230: Content Projection Department

[0032] 240: Communications Department

[0033] 250: Control Unit

[0034] 300: Device

[0035] 310: Image sensor

[0036] 320: Projector

[0037] 410: Reference area

[0038] 411: Standard Plate

[0039] 420: Area 1

[0040] 430: Area 2

[0041] 431: Golf ball location information

[0042] The following detailed description of the present invention refers to the accompanying drawings, which illustrate specific embodiments in which the present invention may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the present invention. It should be understood that the various embodiments of the present invention, while different from each other, are not necessarily mutually exclusive. For example, specific shapes, structures, and characteristics described herein may be modified and implemented from one embodiment to another without departing from the spirit and scope of the present invention. Furthermore, it should be understood that the positions or arrangements of individual components within each embodiment may also be modified without departing from the spirit and scope of the present invention. Accordingly, the following detailed description is not to be taken in a limiting sense, and the scope of the present invention is to be construed to encompass the scope of the claims and all equivalents thereof. Like reference numerals in the drawings represent the same or similar elements throughout the several aspects.

[0043] Hereinafter, various preferred embodiments of the present invention will be described in detail with reference to the attached drawings so that a person having ordinary skill in the art to which the present invention pertains can easily practice the present invention.

[0044] Composition of the entire system

[0045] FIG. 1 is a drawing schematically showing the configuration of an entire system for projecting golf content according to one embodiment of the present invention.

[0046] As illustrated in FIG. 1, the entire system according to one embodiment of the present invention may include a communication network (100), a golf content management system (200), and a device (300).

[0047] First, the communication network (100) according to one embodiment of the present invention can be configured regardless of the communication mode such as wired communication or wireless communication, and can be configured with various communication networks such as a local area network (LAN), a metropolitan area network (MAN), and a wide area network (WAN). Preferably, the communication network (100) referred to herein may be the well-known Internet or the World Wide Web (WWW). However, the communication network (100) is not necessarily limited thereto, and may include at least a portion of a well-known wired or wireless data communication network, a well-known telephone network, or a well-known wired or wireless television communication network.

[0048] For example, the communication network (100) may be a wireless data communication network that implements conventional communication methods such as WiFi communication, WiFi-Direct communication, Long Term Evolution (LTE) communication, 5G communication, Bluetooth communication (including Bluetooth Low Energy (BLE) communication), infrared communication, ultrasonic communication, etc., at least in part. As another example, the communication network (100) may be an optical communication network that implements conventional communication methods such as LiFi (Light Fidelity), etc., at least in part.

[0049] Next, the golf content management system (200) according to one embodiment of the present invention can perform a function of acquiring location information of a reference area, determining area adjustment information corresponding to a first area to be projected by referring to the acquired location information of the reference area, and projecting golf content to the first area by referring to the area adjustment information.

[0050] The configuration and function of the golf content management system (200) according to the present invention will be described in detail below.

[0051] Next, a device (300) according to one embodiment of the present invention is a digital device that includes a function for communicating after connecting to a golf content management system (200), and any digital device that has a memory means, a microprocessor, and a computing capability, such as a smart phone, a tablet, a smart watch, a smart band, smart glasses, a desktop computer, a notebook computer, a workstation, a PDA, a web pad, a mobile phone, etc., can be adopted as the device (300) according to the present invention.

[0052] In particular, the device (300) may include an application (not shown) that supports a user to receive functions according to the present invention from the golf content management system (200). Such an application may be downloaded from the golf content management system (200) or an external application distribution server (not shown). Meanwhile, the characteristics of such an application may be generally similar to the information acquisition unit (210), area adjustment information determination unit (220), content projection unit (230), communication unit (240), and control unit (250) of the golf content management system (200), which will be described later. Here, at least a portion of the application may be replaced with a hardware device or firmware device that can perform functions substantially identical to or equivalent thereto, as necessary.

[0053] Structure of a golf content management system

[0054] Below, the internal configuration and functions of each component of the golf content management system (200) that performs important functions for implementing the present invention will be examined.

[0055] FIG. 2 is a drawing showing in detail the internal configuration of a golf content management system (200) according to one embodiment of the present invention.

[0056] As illustrated in FIG. 2, a golf content management system (200) according to one embodiment of the present invention may be configured to include an information acquisition unit (210), an area adjustment information determination unit (220), a content projection unit (230), a communication unit (240), and a control unit (250). According to one embodiment of the present invention, at least some of the information acquisition unit (210), the area adjustment information determination unit (220), the content projection unit (230), the communication unit (240), and the control unit (250) may be program modules that communicate with an external system (not shown). These program modules may be included in the golf content management system (200) in the form of an operating system, an application program module, or other program modules, and may be physically stored in various known storage devices. In addition, these program modules may also be stored in a remote storage device capable of communicating with the golf content management system (200). Meanwhile, these program modules include, but are not limited to, routines, subroutines, programs, objects, components, data structures, etc. that perform specific tasks or execute specific abstract data types, as described later in accordance with the present invention.

[0057] Meanwhile, although the golf content management system (200) has been described as above, this description is exemplary, and it is obvious to those skilled in the art that at least some of the components or functions of the golf content management system (200) may be realized within a device (300) or a server (not shown) or included within an external system (not shown) as needed.

[0058] First, the information acquisition unit (210) according to one embodiment of the present invention can perform a function of acquiring location information of a reference area.

[0059] Specifically, the reference area according to one embodiment of the present invention may include at least a portion of the ground (e.g., the ground of the batting cage).

[0060] For example, a reference area according to one embodiment of the present invention may include an area corresponding to the position of a reference plate configured to be positioned on the ground. Here, the reference plate according to one embodiment of the present invention may be positioned at a specific position on the batting box by a user. In addition, the reference plate according to one embodiment of the present invention may have a specific pattern (e.g., a grid pattern) displayed on it to facilitate acquisition of positional information of the reference plate.

[0061] Additionally, the location information of the reference area according to one embodiment of the present invention may be acquired from at least one image sensor (e.g., a camera). However, the location information of the reference area according to one embodiment of the present invention may also be acquired from a sensor other than the image sensor (e.g., a radar sensor, etc.).

[0062] For example, the information acquisition unit (210) according to one embodiment of the present invention can identify a reference plate from at least one image sensor and acquire position information of the reference plate.

[0063] Meanwhile, the information acquisition unit (210) according to one embodiment of the present invention may further acquire slope information of the reference area.

[0064] For example, the information acquisition unit (210) according to one embodiment of the present invention may acquire both position information and inclination information of the reference area. For a specific example, the information acquisition unit (210) according to one embodiment of the present invention may identify a reference plate from at least one image sensor, identify preset identification points of the reference plate (for example, when the reference plate is rectangular, the four corners of the reference plate may be identification points), and acquire position information and inclination information of the reference area from the identification points.

[0065] However, the method by which the information acquisition unit (210) according to one embodiment of the present invention acquires location information of the reference area is not limited to the method described above, and may be changed in various ways within the scope that can achieve the purpose of the present invention.

[0066] Next, the area adjustment information determination unit (220) according to one embodiment of the present invention can perform a function of determining area adjustment information corresponding to the first area to be projected by referring to the position information of the acquired reference area.

[0067] Specifically, the first area according to one embodiment of the present invention may include at least a portion of the ground (e.g., the ground of the hitting box) and may include an area on which golf content is projected.

[0068] Additionally, the area adjustment information according to one embodiment of the present invention may include information regarding content adjustment (e.g., conversion of content or calibration for conversion of content) for projecting golf content onto the first area.

[0069] For example, the area adjustment information determination unit (220) according to one embodiment of the present invention can determine area adjustment information by referring to the location information of the acquired reference area.

[0070] For another example, the area adjustment information determining unit (220) according to one embodiment of the present invention may determine area adjustment information by referring to distance information between a light source (e.g., a light source or projector of a content projection unit for projecting golf content) and a reference area. Here, according to one embodiment of the present invention, the distance information between the light source and the reference area may be determined based on information input from a manager, or may be acquired from an image sensor or an external system (not shown).

[0071] As another example, the area adjustment information determination unit (220) according to one embodiment of the present invention may determine area adjustment information by referring to slope information of a reference area.

[0072] As another example, the area adjustment information determination unit (220) according to one embodiment of the present invention may determine area adjustment information by referring to at least one of the position information of the acquired reference area, the slope information of the acquired reference area, and the distance information between the light source and the reference area.

[0073] In addition, the region adjustment information determining unit (220) according to one embodiment of the present invention may determine region adjustment information using at least one of an affine transformation and a homography transformation. Here, the affine transformation according to one embodiment of the present invention may include at least one of a transformation that allows content to be transformed while maintaining pixel values ​​without changing the arrangement structure of pixels, and a geometric transformation that may be formed by a combination of at least one of parallel translation, enlargement, reduction, and rotation of an image. In addition, the homography transformation according to one embodiment of the present invention may include a perspective transformation between two different planes. In addition, the first region according to one embodiment of the present invention may include at least one of a planar region and a spatial region. Here, according to one embodiment of the present invention, the region adjustment information determining unit (220) may determine region adjustment information that allows golf content, which will be described later, to be projected without distortion onto the planar region and the spatial region. Therefore, according to the present invention, even if a ground area (e.g., the ground area of ​​a tee that a user can support while making a golf swing) includes an area with unevenness, golf content can be projected without distortion. Furthermore, according to the present invention, area adjustment information is determined, and golf content is projected with reference to the area adjustment information, thereby enabling golf content to be projected without distortion.

[0074] Meanwhile, the area adjustment information determination unit (220) according to one embodiment of the present invention may determine area adjustment information corresponding to the first area in real time by referring to the location information of the acquired reference area.

[0075] Next, the content projection unit (230) according to one embodiment of the present invention can perform a function of projecting golf content to the first area by referring to area adjustment information.

[0076] Specifically, golf content according to one embodiment of the present invention may include at least one of content regarding a user's golf shot and content regarding a user's golf swing. Here, at least one of the content regarding a user's golf shot and content regarding a user's golf swing according to one embodiment of the present invention may include content generated by referencing a golf shot image or a golf swing image acquired from an image sensor. In addition, at least one of the content regarding a user's golf shot and content regarding a user's golf swing according to one embodiment of the present invention may be acquired from a database or system (not shown) (e.g., a virtual golf simulator) inside or outside the golf content management system (200).

[0077] Additionally, the content projection unit (230) according to one embodiment of the present invention can project golf content onto the first area by using a light source (e.g., a light source of a projector). However, it should be apparent to those skilled in the art that the projection of golf content according to one embodiment of the present invention can be accomplished in various ways other than using a projector.

[0078] Meanwhile, according to one embodiment of the present invention, the area adjustment information determining unit (220) may determine a second area for acquiring location information of a golf ball. Here, the information acquiring unit (210) according to one embodiment of the present invention may further acquire location information of the golf ball, and the content projecting unit (230) according to one embodiment of the present invention may dynamically change the golf content projected on the first area with reference to the location information of the golf ball.

[0079] Specifically, since a sensor (e.g., an image sensor) for obtaining position information of a golf ball may be capable of sensing only a limited area (e.g., an area narrower than the entire area of ​​the hitting box), the second area according to one embodiment of the present invention may include an area on the ground (e.g., a hitting box area on the ground) for obtaining position information of a golf ball (e.g., for sensing a golf ball). Here, the second area according to one embodiment of the present invention may be an area of ​​a preset size linked to the performance (or detailed information) of the sensor.

[0080] For example, the information acquisition unit (210) according to one embodiment of the present invention can identify a golf ball in a second area and acquire location information of the golf ball using an image sensor.

[0081] For another example, the content projection unit (230) according to one embodiment of the present invention can project golf content by referring to the position information of the acquired golf ball.

[0082] As another example, the golf content projected by the content projection unit (230) according to one embodiment of the present invention may include content associated with at least one of the position of a golf ball and the trajectory of the golf ball. As a specific example, the content projection unit (230) according to one embodiment of the present invention may project content in which the trajectory of a golf ball is continuously displayed as golf content onto the first area.

[0083] As another example, the information acquisition unit (210) according to one embodiment of the present invention may acquire information on the location of a golf ball and further acquire information on the user's golf swing image. Here, the content projection unit (230) according to one embodiment of the present invention may generate information on the user's golf shot and information on the user's golf swing by referencing at least one of the information on the location of the golf ball and the information on the user's golf swing image, and may project the information as golf content onto the first area.

[0084] In addition, when the information acquisition unit (210) according to one embodiment of the present invention acquires the position information of the golf ball in the second area, the content projection unit (230) according to one embodiment of the present invention may project the first content set in advance (e.g., content providing information indicating that the measurement of the golf shot is ready). Conversely, when the information acquisition unit (210) according to one embodiment of the present invention fails to acquire the position information of the golf ball in the second area, the content projection unit (230) according to one embodiment of the present invention may project the second content set in advance (e.g., content providing information indicating that the measurement of the golf shot is not ready and therefore the position of the golf ball must be corrected).

[0085] Meanwhile, the golf content projected by the content projection unit (230) according to one embodiment of the present invention is not limited to the aforementioned golf content, and various golf content may be provided. For example, certain golf content obtained from an external system (e.g., a virtual golf simulator) may be projected onto the first area.

[0086] Furthermore, the content projected onto the first area by the content projection unit (230) according to one embodiment of the present invention may be content other than golf content (e.g., content related to baseball).

[0087] Next, the communication unit (240) according to one embodiment of the present invention can perform a function that enables data transmission and reception from / to the information acquisition unit (210), the area adjustment information determination unit (220), and the content projection unit (230).

[0088] Finally, the control unit (250) according to one embodiment of the present invention can perform a function of controlling the flow of data between the information acquisition unit (210), the area adjustment information determination unit (220), the content projection unit (230), and the communication unit (240). That is, the control unit (250) according to one embodiment of the present invention can control the flow of data from / to the outside of the golf content management system (200) or the flow of data between each component of the golf content management system (200), thereby controlling the information acquisition unit (210), the area adjustment information determination unit (220), the content projection unit (230), and the communication unit (240) to perform their own functions.

[0089] Hereinafter, the content of projecting golf content according to one embodiment of the present invention will be described in detail with reference to FIGS. 3 to 5.

[0090] Example 1

[0091] FIG. 3 is a drawing exemplarily illustrating a process of determining area adjustment information corresponding to a first area (420) that is a projection target according to one embodiment of the present invention.

[0092] For example, referring to FIG. 3, the information acquisition unit (210) can acquire position information of a reference area (410) from at least one image sensor (310). Here, a user can place a reference plate (411) configured to be placed on the ground in a specific area on the ground, and the information acquisition unit (210) can acquire position information of the reference plate (411) as position information of the reference area (410). In addition, the reference plate (411) may have a specific pattern (e.g., a grid pattern) displayed on it to facilitate acquisition of position information or inclination information. In addition, the information acquisition unit (210) may further acquire at least one of inclination information of the reference area (410) and distance information between the projector (320) and the reference area.

[0093] Next, referring to FIG. 3, the area adjustment information determining unit (220) can determine area adjustment information corresponding to the first area (420) that is the projection target by referring to the position information of the acquired reference area (410). Here, the area adjustment information determining unit (220) can also determine area adjustment information by further referring to at least one of the inclination information of the reference area (410) and the distance information between the projector (320) and the reference area.

[0094] Next, the content projection unit (230) can project golf content to the first area (420) by referring to the area adjustment information.

[0095] Second Example

[0096] FIG. 4 is a drawing exemplarily illustrating a process of determining a second area (430) for obtaining location information (431) of a golf ball according to one embodiment of the present invention.

[0097] For example, referring to FIG. 4, the area adjustment information determining unit (220) can determine a second area (430) for obtaining location information (431) of a golf ball. Here, the second area can include an area for the image sensor (310) to obtain location information (431) of the golf ball.

[0098] In addition, referring to FIG. 4, the information acquisition unit (210) can further acquire location information (431) of the golf ball in the second area (430). Here, the content projection unit (230) can dynamically change the golf content projected on the first area (420) by referring to the location information of the golf ball.

[0099] Here, the first area (420) may include the second area (430), but the first area (420) and the second area (430) may mean the same area, or may be determined so that there are no overlapping areas.

[0100] Third Example

[0101] FIG. 5 is a drawing exemplarily showing a situation in which golf content is projected on a first area (420) that is a projection target according to one embodiment of the present invention.

[0102] For example, referring to FIG. 5, the area adjustment information determining unit (220) can determine a second area (430) for obtaining location information (431) of a golf ball.

[0103] Next, the information acquisition unit (210) can acquire the location information (431) of the golf ball, and the content projection unit (230) can dynamically change the golf content projected on the first area (420) by referring to the location information (431) of the golf ball.

[0104] Here, the content projection unit (230) can dynamically change the golf content projected onto the first area (420) by continuously projecting the position of the golf ball and the trajectory of the golf ball onto the first area (420).

[0105] Example 4

[0106] An information acquisition unit (210) according to one embodiment of the present invention can acquire location information of a reference area by referring to a pattern of a reference plate configured to be placed on the ground.

[0107] Next, the area adjustment information determination unit (220) can determine area adjustment information corresponding to the first area to be projected by referring to the location information of the reference area.

[0108] For example, the area adjustment information determining unit (220) can determine area adjustment information by sequentially applying homography transformation and affine transformation, thereby enabling golf content to be projected onto the first area without distortion. Specifically, the area adjustment information determining unit (220) can determine area adjustment information by multiplying the homography transformation matrix H1 and the affine transformation matrix A to derive matrix H2. Here, the area adjustment information can include TRS (Transform, Rotation, and Scale) attribute information.

[0109] Next, the content projection unit (230) can project golf content to the first area by referring to the area adjustment information.

[0110] The embodiments of the present invention described above may be implemented in the form of program commands that can be executed through various computer components and recorded on a computer-readable recording medium. The computer-readable recording medium may include program commands, data files, data structures, etc., either singly or in combination. The program commands recorded on the computer-readable recording medium may be specially designed and configured for the present invention or may be known and available to those skilled in the art of computer software. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks, and magnetic tapes, optical recording media such as CD-ROMs and DVDs, magneto-optical media such as floptical disks, and hardware devices specifically configured to store and execute program commands, such as ROMs, RAMs, and flash memories. Examples of program commands include not only machine language codes generated by a compiler, but also high-level language codes that can be executed by a computer using an interpreter, etc. Hardware devices may be changed into one or more software modules to perform processing according to the present invention, and vice versa.

[0111] Although the present invention has been described above with specific details such as specific components and limited examples and drawings, these are provided only to help a more general understanding of the present invention, and the present invention is not limited to the above examples, and those with ordinary knowledge in the technical field to which the present invention pertains can make various modifications and changes based on this description.

[0112] Therefore, the idea of ​​the present invention should not be limited to the embodiments described above, and not only the scope of the patent claims described below but also all scopes equivalent to or equivalently modified from the scope of the patent claims are considered to fall within the scope of the idea of ​​the present invention.

Claims

1. As a method for projecting golf content, Step of obtaining location information of a reference area, A step of determining area adjustment information corresponding to the first area to be projected by referring to the position information of the reference area acquired above, and A step of projecting golf content into the first area by referring to the above area adjustment information. method.

2. In paragraph 1, The above golf content is content related to at least one of the position of a golf ball and the trajectory of a golf ball. method.

3. In paragraph 1, The location information of the above reference area is obtained from at least one image sensor. method.

4. In paragraph 1, In the above decision step, a second area is determined to obtain location information of the golf ball. method.

5. In paragraph 4, In the above acquisition step, further acquire the location information of the golf ball, In the above projection step, the golf content projected on the first area is dynamically changed by referring to the position information of the golf ball. method.

6. In paragraph 1, The first region includes at least one of a planar region and a spatial region. method.

7. In paragraph 1, The above reference area is an area corresponding to the position of the reference plate configured to be placed on the ground. method.

8. A non-transitory computer-readable recording medium recording a computer program for executing the method according to paragraph 1.

9. As a system for projecting golf content, An information acquisition unit that acquires location information of a reference area, An area adjustment information determination unit that determines area adjustment information corresponding to a first area to be projected by referring to the position information of the reference area obtained above, and A content projection unit that projects golf content into the first area by referring to the above area adjustment information. System.

10. In paragraph 9, The above golf content is content related to at least one of the position of a golf ball and the trajectory of a golf ball. System.

11. In paragraph 9, The location information of the above reference area is obtained from at least one image sensor. System.

12. In paragraph 9, The above area adjustment information determining unit determines a second area for obtaining location information of a golf ball. System.

13. In paragraph 12, The above information acquisition unit further acquires location information of the golf ball, The above content projection unit dynamically changes the golf content projected on the first area by referring to the position information of the golf ball. System.

14. In paragraph 9, The first region includes at least one of a planar region and a spatial region. System.

15. In paragraph 9, The above reference area is an area corresponding to the position of the reference plate configured to be placed on the ground. System.

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