KR20210026483A - Method for detecting golf ball hitting and golf swing motion analysis apparatus using the same - Google Patents

Abstract

A method for detecting a hit of a golf ball according to an embodiment of the present invention comprises the steps of: setting, by a golf swing motion analysis device, the shooting properties of at least two cameras for capturing a golf ball and a user located at a hitting position of the golf ball; checking, by the golf swing motion analysis device, the position information of the golf ball in an image frame of the image acquired by the camera; determining, by the golf swing motion analysis device, whether to hit the golf ball whose position information is checked based on the image acquired by the camera; and collecting and storing, by the golf swing motion analysis device, image information obtained by the camera when the ball is determined to be hit.

Description

A method of detecting a golf ball hit and a golf swing motion analysis device using the same TECHNICAL FIELD {METHOD FOR DETECTING GOLF BALL HITTING AND GOLF SWING MOTION ANALYSIS APPARATUS USING THE SAME}

The present invention relates to a method for detecting a golf ball hit and a golf swing motion analysis apparatus using the same. In more detail, a golf swing motion analysis device that checks the point of time when a golf ball is hit by using an image captured by a high-speed camera and provides the user with a photographed image in real time to correct the golf swing posture by the user. will be.

Golf, a representative outdoor sport, has recently become popular as a form of screen golf that can be enjoyed indoors with the development of IT technology, and through this, the number of people entering golf is increasing.

In addition, in golf, the swing posture before hitting the ball using the club is the most important factor in improving the skill, and continuous practice is required to acquire a sophisticated swing posture. Accordingly, many golfers pay and take lessons from professional players at indoor driving ranges, but time and cost are limited, so they have to practice swing alone for many hours.

In order to improve such problems, various technologies for acquiring the user's movement and correcting the swing posture by installing a sensor that can detect the movement of golfers, clubs, and golf balls in an indoor golf course or attaching a wearable device to a part of the body. Have been disclosed. However, since conventional techniques are also techniques of obtaining expert advice based on data acquired by various sensors, there is a limit to correcting a golfer's own swing posture.

In addition, conventional technologies install a sensor plate on the floor to detect a golf ball on the floor in order to accurately determine the timing of hitting the golf ball. If the sensor is placed on the floor, the sensors are damaged by impact. It is difficult to efficiently operate swing exercise devices to which the conventional techniques are applied because it is highly likely to be.

Therefore, a technology that can accurately detect the timing of hitting a golf ball by a user's swing and correct the swing posture is required without the inconvenience of attaching a wearable device to the body or the hassle of installing a sensor on the floor. The invention relates to this.

Korean Patent Application Publication No. 10-2010-0129973 (2010.12.10.) Republic of Korea Patent Publication No. 10-1195497 (2012.10.23.) Republic of Korea Patent Publication No. 10-1170236 (2012.07.25.)

The technical problem to be solved by the present invention is to provide a method capable of accurately measuring the time point of hitting a golf ball in a user's swing motion with only an image captured by a high-speed camera.

Another technical problem to be solved by the present invention is to provide a golf swing motion analysis apparatus capable of correcting a golf swing posture by the user by storing a golf swing image of a user and outputting it to a display module.

The technical problems of the present invention are not limited to the technical problems mentioned above, and other technical problems that are not mentioned will be clearly understood by those skilled in the art from the following description.

Golf swing motion analysis apparatus according to an embodiment of the present invention for achieving the above technical problem, is disposed at the front top of the user located at the hitting position of the golf ball, the first and second for acquiring the hitting image of the golf ball A pair of trigger units including a trigger camera, a motion unit including a motion camera for acquiring a whole body motion image of the user, a golf ball hitting image acquired by the trigger unit, and a full body motion image acquired by the motion unit are analyzed. It includes an analysis processing unit and a display unit for outputting a swing posture of the user analyzed by the analysis processing unit.

According to an embodiment, the trigger unit transmits a photographing signal acquired from the first or second trigger camera to the other camera and the motion camera, and the first and second trigger cameras and the motion camera It may have the same image frame rate based on the photographing signal.

According to an embodiment, the analysis processing unit may designate at least one photographing attribute of a photographing position of the first and second trigger cameras, rotation information, an expected hitting position of a golf ball, and an operation speed.

According to an embodiment, the analysis processing unit divides the golf ball hitting image acquired by the trigger unit into image frames, detects a golf ball shape object within the divided image frame, and detects a continuous object of the detected object. By checking the change in coordinates within the image frame, it is possible to check whether the user is ready to hit the golf ball.

According to an embodiment, the analysis processor may detect the image frame at the moment the golf ball is hit based on the number of total image frames of the hitting image of the golf ball or the whole body motion image and a coordinate change value of the detected object. have.

According to an embodiment, the analysis processing unit measures angle information or position information on any one or more of the user's left and right shoulder joints, left and right hip joints, right wrists, and left wrists in the image frame hit by the golf ball, and , The measured angle information or location information may be mapped to a whole body motion image acquired by the motion unit.

In a method for detecting a hit of a golf ball according to another embodiment of the present invention, a golf swing motion analysis device may determine the photographing properties of a golf ball and at least two cameras for photographing a user positioned at a hitting position of the golf ball. The step of setting, the golf swing motion analysis device, checking the position information of the golf ball in the image frame of the image acquired by the camera, the golf swing motion analysis device, based on the image acquired by the camera, the Determining whether the golf ball whose location information is confirmed is hit, and when it is determined that the golf swing motion analysis apparatus has hit the golf ball, collecting and storing the image information acquired by the camera.

According to an embodiment, at least two or more cameras are disposed at the top of the front of a right-handed or left-handed user to obtain at least a first and a second trigger camera for obtaining a hitting image of a golf ball, and a motion camera for obtaining a full-body motion image. Including two or more, the step of setting the shooting property may include at least one of an image frame of the first and second trigger cameras or the motion camera, a shooting position, rotation information, an expected hitting position of a golf ball, and an operation speed. It may be a step of setting the above photographing properties.

According to an embodiment, the checking of the location information of the golf ball includes checking whether an object in the shape of a golf ball exists in the image frame acquired by the camera, and when it is determined that the object in the shape of a golf ball exists. , Determining whether the golf ball is ready based on the coordinate change value of the golf ball in the continuous image frame, and when it is determined that the golf ball is ready, among the coordinate value of the golf ball, the size of the golf ball, and the pixel value in the image frame It may include the step of checking at least one location information.

According to an embodiment, the determining whether the golf ball is hit may include checking the total number of image frames of the image acquired by the camera, sequentially assigning an index to the identified image frame, and calculating a trigger index. It may include the step of searching.

According to an embodiment, the searching of the trigger index includes: assuming an image frame belonging to an intermediate value among the identified image frames as a trigger index, and whether the assumed index image frame corresponds to a time point of hitting a golf ball. In order to determine, it may include comparing the coordinate change value of the golf ball and the size of the golf ball in the assumed index image frame.

According to an embodiment, after the step of collecting and storing the image information, angle information or position in any one or more of the user's left and right shoulder joints, left and right hip joints, right wrists, and left wrists in the index image frame. The method may further include measuring information and mapping the measured angle information or location information to the whole body motion image acquired by the motion unit and outputting the measured angle information to the display unit.

According to the present invention as described above, it is possible to accurately determine the time point of hitting the golf ball by analyzing the image acquired by the high-speed camera in units of frames.

In addition, by synchronizing the photographing signal of two trigger cameras that acquire an image that can determine the point of time of hitting the golf ball and one motion camera that acquires an image that can confirm the user's swing position, the user's swing position from multiple angles. It has the effect of being able to check.

In addition, since a separate sensor for correcting the user's swing posture is not required, the golf swing motion analysis device provider can reduce the cost required for sensor maintenance, and the user is better than without a separate device. It has the effect of being able to conveniently correct the swing posture.

The effects of the present invention are not limited to the above-mentioned effects, and other effects not mentioned will be clearly understood by those skilled in the art from the following description.

1 is a diagram showing the configuration of a golf swing motion analysis apparatus according to an embodiment of the present invention.
2 is a view for explaining the position of a camera included in the golf swing motion analysis apparatus according to an embodiment of the present invention.
3 is a flow chart showing the flow of a method for detecting a hit of a golf ball according to an embodiment of the present invention.
FIG. 4 is a flowchart illustrating step S100 shown in FIG. 3.
5 is a flow chart illustrating step S200 shown in FIG. 3.
6 is a flow chart illustrating step S300 shown in FIG. 3.
7 is an exemplary screen in which a golf swing image is displayed on a display unit of a swing analysis device according to an embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Advantages and features of the present invention, and a method of achieving them will become apparent with reference to the embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments to be posted below, but may be implemented in various different forms, and only these embodiments make the posting of the present invention complete, and common knowledge in the technical field to which the present invention pertains. It is provided to completely inform the scope of the invention to the possessor, and the invention is only defined by the scope of the claims. The same reference numerals refer to the same elements throughout the specification.

Unless otherwise defined, all terms (including technical and scientific terms) used in the present specification may be used with meanings that can be commonly understood by those of ordinary skill in the art to which the present invention belongs.

In addition, terms defined in a commonly used dictionary are not interpreted ideally or excessively unless explicitly defined specifically. The terms used in this specification are for describing exemplary embodiments and are not intended to limit the present invention. In this specification, the singular form also includes the plural form unless specifically stated in the phrase.

As used in the specification, "comprises" and/or "comprising" refers to the presence of one or more other components, steps, actions and/or elements in which the recited component, step, operation and/or element is Or does not preclude additions.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

1 is a view showing the configuration of a golf swing motion analysis apparatus 10 according to an embodiment of the present invention, FIG. 2 is a position of a camera included in the golf swing motion analysis apparatus 10 according to an embodiment of the present invention It is a figure for explaining.

Referring to FIG. 1, it can be seen that the golf swing motion analysis apparatus 10 includes a trigger unit 100, a motion unit 200, an analysis processing unit 300, a display unit 400, and a database 500.

The trigger unit 100 may acquire a hitting image of a golf ball in a space in which the golf swing motion analysis apparatus 10 (hereinafter, referred to as a swing analysis apparatus) is installed. Specifically, the trigger unit 100 includes a pair of first and second trigger cameras 110 and 120 disposed at the top of the front of the user located at the hitting position of the golf ball to obtain a hitting image of the golf ball. In this case, the directions in which the first and second trigger cameras 110 and 120 are disposed may be disposed in consideration of the direction of the user's main handle during the golf swing.

That is, referring to FIG. 2, in order to prevent a situation in which the golf ball is covered by the user's body and club when the user practicing the golf swing is right-handed or left-handed, the first and second trigger cameras ( 110 and 120 may be disposed on the upper right front side and the upper left front side, respectively, based on the moving direction of the golf ball and the golf ball.

In addition, in the present invention, a trigger means a point in time at which the golf ball is hit, and the trigger unit 100 includes the first and second trigger cameras 110 and 120 to obtain an image of the point at which the golf ball is hit. Settings can be adjusted.

The motion unit 200 may acquire a motion image of a user's whole body in a space in which the swing analysis device 10 is installed. Specifically, the motion unit 200 may include a motion camera 210 disposed at a position where a user's whole body can be photographed without restriction on a position in which a right-handed user or a left-handed user is located.

Meanwhile, in the present invention, the first and second trigger cameras 110 and 120 and the motion camera 210 are cameras that photograph a user's swing motion at high speed, and can acquire hundreds to tens of thousands of frames in one second.

Referring back to FIG. 1, the analysis processing unit 300 may analyze a golf ball hitting image acquired by the trigger unit 100 and a whole body motion image acquired by the motion unit 200. Specifically, the analysis processing unit 300 may designate the shooting properties of the trigger unit 100 and the motion unit 200 and collect the captured images according to the designated shooting properties. Here, the shooting attribute may include at least one of a shooting position of the first and second trigger cameras 110 and 120 and the motion camera 210, rotation information, an expected hitting position of a golf ball, and an operation speed of the camera. have.

According to such a photographing property designation of the analysis processing unit 300, the trigger unit 100 and the motion unit 200 may capture a golf hitting image and a whole body motion image at uniform time intervals according to the control signal of the analysis processing unit 300. The first or second trigger cameras 110 and 120 control to transmit a photographing signal acquired each time one image frame is photographed to the trigger camera and motion camera 210 connected by wire or wirelessly. , All cameras included in the swing analysis device 10 may take pictures with the same image frame rate (image frame rate).

On the other hand, the analysis processing unit 300 collects the images provided by the trigger unit 100 and the motion unit 200, and can sequentially analyze whether the golf ball is ready, whether the ball is hit, and how the user's posture at the time of the hit is. have.

Specifically, the analysis processing unit 300 may divide the golf ball hitting image acquired by the trigger unit 100 into image frames, detect an object in the shape of a golf ball within the divided image frame, and detect the coordinates of the object. By checking the change, you can check whether the golf ball is ready to hit. Here, the method of determining whether the golf ball is ready to hit may be confirmed based on a change in coordinate value as well as a time interval between image frames arranged in front of and behind the image frame in which the shape of the golf ball is detected.

If it is confirmed that the golf ball is prepared in this way, the analysis processing unit 300 can acquire the hitting image of the golf ball and the whole body motion image of the user through the trigger unit 100 and the motion unit 200, and the entire image of the corresponding images An image frame at the moment the golf ball is hit may be detected based on the number of frames and a coordinate change value of the detected object (golf ball). For example, if the total number of image frames of an image is 1,000, the analysis processing unit 300 may check whether an image frame in which a sudden change in coordinates of a golf ball is detected exists in the 1st to 500th image frames divided by half. . Accordingly, if a sudden change in coordinates of the golf ball is not detected in the first to 500th image frames, a change in coordinates of the golf ball is detected within the 500th to 750th frames of the 500th to 1,000th, etc., in the entire image frame. An erasing method that removes half of the image frame can be used.

In addition, the analysis processing unit 300 detects the image frame at the moment the golf ball is hit, and then the angle information from any one of the user's left and right shoulder joints, left and right hip joints, right wrists, and left wrists in the corresponding image frame. Alternatively, position information may be measured, and the measured angle information or position information may be mapped to a whole body motion image acquired by the motion unit 100.

The display unit 400 may output the user's swing posture analyzed by the analysis processing unit 300. In addition, by providing not only the user's posture angle and body position information, but also the correct posture angle and body position information, it is possible to help the user to correct the posture by himself.

In addition, the display unit 400 may be a display module capable of sensing a user's touch, or may further include an input unit (not shown) for sensing a user input, through which the user's information related to the golf swing can be input. have. Here, the user's information related to the golf swing means whether the user is right-handed or left-handed, club information to be used (eg, driver, putter), which part of the body position that the swing analysis device 10 should focus on observation, etc. It can contain a variety of information.

The database 500 may store photographing properties and user information of the trigger unit 100 and the motion unit 200. For example, the shooting attribute may store the shooting position of the first and second trigger cameras 110 and 120 and the motion camera 210, rotation information, and the predicted hitting position and motion speed of a golf ball, and user information May include various types of information such as a user identification number, a user's physical characteristics (left-handed, right-handed), and previous swing information (posture, golf ball hitting speed) of the user.

So far, the golf swing motion analysis apparatus 10 according to an embodiment of the present invention has been described. According to the present invention, information for analyzing a user's swing motion can be obtained by using the first and second trigger cameras 110 and 120 and the motion camera 210, which are high-speed cameras, and the user You can check your posture. Hereinafter, a method of detecting a hit of a golf ball using the golf swing motion analysis apparatus 10 will be described.

3 is a flow chart showing the flow of a method for detecting a hit of a golf ball according to an embodiment of the present invention.

Meanwhile, the method shown in FIG. 3 is only a preferred embodiment for achieving the object of the present invention, and it is a matter of course that some steps may be deleted or added, or one step may be included in another step as necessary.

Referring to FIG. 3, the swing analysis apparatus 10 sets photographing properties of a golf ball and at least two or more cameras photographing a user positioned at a hitting position of the golf ball (S100). Here, the camera includes a camera disposed at the top of the front of the right-handed or left-handed user in the space where the swing analysis device 10 is installed, and the first and second trigger cameras 110 and 120 acquiring images of hitting the golf ball. ) And a motion camera 210 that acquires a whole body motion image of the user. In addition, the first and second trigger cameras 200 and the motion camera 210 may be high-speed cameras that acquire hundreds to tens of thousands of image frames per second.

FIG. 4 is a flowchart illustrating step S100 shown in FIG. 3.

Referring to FIG. 4, the swing analysis apparatus 10 may load a previous set value from the database 500 (S110) and check whether the set value is changed (S120). Here, the set value refers to the shooting properties of the first and second trigger cameras 200 and the motion camera 210, for example, the first and second trigger cameras 110 and 120 and the motion camera 210 ) Of the frame rate, the photographing position, rotation information, the predicted hitting position of the golf ball, and at least one of the motion speed.

In addition, whether or not the set value is changed is performed in a manner in which the swing analysis device 10 outputs user information to the display unit 500 and receives a user request for the change of the set value, or the swing analysis device 10 Before analyzing, it is possible to detect a user's placement position based on the images captured by the first and second trigger cameras 110 and 120 and the motion camera 210 and determine whether a setting value change is necessary. . For example, the image to be photographed varies according to the user's body information (eg, key, main handle), and the swing analysis device 10 determines whether or not to change the photographing setting at the time when the user takes a seat at the position where the golf ball is located. You can decide.

In step S120, when the shooting setting value is changed, the swing analysis device 10 sequentially changes the position and rotation setting value of the camera (S130, YES), and changes the recognition area setting value of the camera (S140), The operation speed setting value can be changed (S150). Here, the change of the recognition area setting value is performed to secure an area in which the golf ball is not covered by the user's body and club in the shooting area of the first and second trigger cameras 110 and 120 and the motion camera 210. Can be.

On the other hand, in step S120, if the photographing setting value is not changed, the swing analysis apparatus 10 may apply a plurality of camera settings to the previous setting value (S180, NO).

When the change of the shooting setting value is completed through steps S130 to S150, the swing analysis device 10 may check whether to save the changed shooting setting value (S160). For example, the confirmation of whether to save may be performed by outputting an image to be photographed together with a changed photographing setting value to the display unit 500 and receiving a photographing setting confirmation signal from the user.

In the case of storing the shooting setting value changed in step S160, the swing analysis device 10 may store it in the database 500 (S170, YES), and apply a plurality of camera settings as the stored shooting setting value (S180).

On the other hand, in step S160, if the changed shooting setting value is not stored, it is possible to check whether to change the shooting setting value to the user again (S120, NO).

Referring back to FIG. 3, after step S100, the swing analysis apparatus 10 checks the location information of the golf ball in the image frame of the image acquired by the camera (S200). That is, the swing analysis device 10 may acquire position information of a golf ball in a stopped state and a ready state in order to determine the time point of hitting the golf ball. Specifically, the position information refers to the position coordinates of the golf ball, the position coordinates of the golf ball. It may include a diameter or radius, a size of a pixel, and the like.

5 is a flow chart illustrating step S200 shown in FIG. 3.

Referring to FIG. 5, the swing analysis apparatus 10 may acquire an image of a golf ball acquired by the first and second trigger cameras 110 and 120 (S201 ).

After step S201, the swing analysis apparatus 10 may check whether the user is left-handed or right-handed (S202). Here, the information can be checked by receiving input from the user or by loading user information from the database 500.

In step S202, when the user is left-handed, the first trigger camera 110 detects a foreground object in the image frame of the image acquired (S203-1), and when the user is right-handed, the second trigger camera 120 A foreground object may be detected from an image frame of an image acquired by) (S203-2).

If the foreground object is detected in steps S203-1 and S203-2, the swing analysis apparatus 10 processes the detected foreground object with a circle fitting (S204), and checks whether an object in the shape of a golf ball exists ( S205).

If, in step S205, when it is determined that the object in the shape of a golf ball does not exist, the swing analysis device 10 can check whether the previous coordinates of the shape of the golf ball exist (S205-1, NO), and the previous coordinates exist. In this case, it is possible to delete the previous coordinates (S205-2, YES) and return to the step of acquiring the image of the golf ball (S201), and even if the previous coordinates do not exist, the step of acquiring the image of the golf ball may return. Can (S201, NO).

On the other hand, when it is confirmed that the object in the shape of a golf ball exists in step S205, the swing analysis device 10 may store the coordinates R of the object as the current object coordinates (S206, YES), and in the database 500 In order to organize the information, it is possible to check whether the coordinates R'of the previous object exist (S207).

If the previous coordinates do not exist in step S207, the swing analysis apparatus 10 stores the current object coordinates R as the previous object coordinates R'and the current time t as the previous time t'. (S207-1, NO), it is possible to return to the step of acquiring the image of the golf ball (S201).

On the other hand, if the previous coordinates exist in step S207, the swing analysis apparatus 10 may calculate whether the difference between the current object coordinates R and the previous object coordinates R'is 2 pixels or less (S208). Here, 2 pixels are exemplary reference values for describing the present invention, and may be set to different values according to the resolutions of the first and second trigger cameras 110 and 120.

If the difference value calculated in step S208 is 2 pixels or more, it may be understood that the golf ball is not stationary and is moving, that is, the golf ball is not ready. R') may be deleted (S208-1, NO), and return to the step of acquiring the image of the golf ball again (S201).

On the other hand, when the difference value calculated in step S208 is 2 pixels or less, it may be understood that the object in the shape of a golf ball is in a stationary state, and the swing analysis device 10 has a current time (t) and a previous time (t'). It can be calculated whether the difference of 0.5 seconds or more (S209, YES).

If the difference value calculated in step S209 is less than 0.5 seconds, the condition for determining the static state of the object is not satisfied, and the swing analysis apparatus 10 may return to the step of acquiring the image of the golf ball again. (S201, NO).

On the other hand, when the difference value calculated in step S209 is 0.5 seconds or more, it can be understood that the object is stationary for a predetermined time. The swing analysis apparatus 10 A pixel value (V) corresponding to the radius (r) and the radius (r) may be stored (S210, YES).

That is, through the above-described steps S201 to S210, the swing analysis apparatus 10 may know that the golf ball is prepared before the user exercises the swing motion.

Referring back to FIG. 3, after step S200, the swing analysis apparatus 10 determines whether the golf ball whose location information is confirmed is hit based on the image acquired by the camera (S300). Here, in order to determine whether the golf ball is hit, it is necessary to check whether there is an image frame at the moment the golf ball is hit in hundreds to tens of thousands of video image frames, which will be described in more detail below.

6 is a flow chart illustrating step S300 shown in FIG. 3.

Referring to FIG. 6, the swing analysis apparatus 10 may check the total number of image frames (N) of an image captured by the first and second trigger cameras 110 and 120 (S301).

After step S301, the swing analysis apparatus 10 may check whether the trigger index K is searched (S302). Here, the trigger index K may mean an index for an image frame in which a moment when a golf ball is hit in the entire image frame is photographed.

After step S302, the swing analysis device 10 may set the start index (S) to 1 and the end index (E) for searching the trigger index (K) to N (S303), and at the end index (E). The intermediate index (M, M=(ES)/2) can be calculated by subtracting it from the start index (S) and dividing it by half (S304).

After step S304, the swing analysis apparatus 10 may check whether the intermediate index M is less than 1 (S305). That is, if the value obtained by subtracting the start index (S) from the end index (E) and dividing it by half is less than 1, the end index (E) is less than 2, which means that the total number of image frames (N) is secured at least 2 It means that it has not been done, and by checking whether the intermediate index M is less than or equal to 1, an error can be detected in the process of searching for an image frame.

If, in step S304, if the intermediate index (M) is less than 1, the swing analysis apparatus 10 may return to the initial step of checking the total number of image frames (N) (S301, YES).

On the other hand, in step S304, when the intermediate index M is equal to or greater than 1, the swing analysis apparatus 10 may add the start index S and the intermediate index M and set this as a trigger index K (S306). For example, if the entire image frame of the video is 321 fps, the start index (S) may be 1, the end index (E) may be 321, the middle index (M) may be 160, and the trigger index (K) may be 161. .

After step S306, the swing analysis device 10 may calculate a pixel value (V') corresponding to the coordinates of the object in the image frame corresponding to the trigger index K (S307), and the pixel of the object acquired in step S200 The pixel quantity Q having an absolute value of the difference between the pixel value V′ calculated based on the value V and the trigger index K may be greater than 10 (S308). That is, by calculating the difference between the pixel values and the quantity in which the difference is found, it is possible to check whether there is a sharp difference in the image by comparing the image frame corresponding to the trigger index K with the image frame in a state in which the golf ball is ready. In addition, 10, which is the reference value, may be designated as a different value according to the resolution of the first and second trigger cameras 110 and 120.

After step S308, the swing analysis apparatus 10 may check whether the number of pixels Q is greater than the area of a circle based on the radius r of the shape of the golf ball (S309). In other words, it is possible to check whether a sudden change as much as the area of the golf ball has been made through the calculation of the pixel value at the trigger index K, which is assumed to be the moment when the current golf ball is hit.

If, in step S309, the number of pixels is smaller than the area of the circle, it means that the golf ball has not been hit, and the swing analysis device 10 converts the start index (S) from the initial start index (S) to the intermediate index (M). It is possible to convert to the added value (S309-1, NO), and return to the step of calculating the intermediate index M (S304). For example, assuming that the start index (S) is 1, the end index (E) is 321, the middle index (M) is 160, and the trigger index (K) is 161, it is determined that the golf ball has not been hit. In this case, the start index is 162 and the end index E is 321, so that the range for searching the trigger index K may be narrowed.

On the other hand, if the number of pixels is larger than the area of the circle in step S309, the probability that the golf ball has been hit increases, and the swing analysis device 10 determines whether the value obtained by subtracting the start index (S) from the end index (E) is 1 or less. It can be confirmed (S310). This means that the difference between the start index (S) and the end index (E) is one frame, and it means that there is one image frame with the number of pixels larger than the width of the circle. In order to detect the trigger index that best matches the moment of hitting, the following verification steps can be taken.

If, in step S310, the value obtained by subtracting the start index (S) from the end index (S) is greater than 1, the swing analysis device 10 converts the end index (E) from the initial end index (E) to the intermediate index (M). ) Subtracted (S310-1, NO), and returning to the step of calculating the intermediate index M (S304). For example, assuming that the start index (S) is 1, the end index (E) is 321, the middle index (M) is 160, and the trigger index (K) is 161, an image frame having a rapid pixel change is In multiple cases, the start index is 1 and the end index E is 161, so that the range for searching the trigger index K may be narrowed.

On the other hand, in step S310, if the value obtained by subtracting the start index (S) from the end index (S) is less than 1, the swing analysis device 10 completes the search for the trigger index (K) and moves the current time (t) to the previous time. It can be stored as (t') (S311).

After step S311, the swing analysis device 10 can determine whether the difference between the current time t and the previous time t'is 2.5 seconds or more (S312), and finally determine whether the golf ball has been moved by a hit. have.

If, in step S312, the difference between the current time t and the previous time t'is less than 2.5 seconds, the swing analysis apparatus 10 may return to the step of calculating the intermediate index M again (S304, NO. ), in step S311, when the difference between the current time t and the previous time t'is 2.5 seconds or more, the swing analysis device 10 includes the first and second trigger cameras 110 and 120 and the motion camera 210 ) By storing the captured image (S313, YES), the golf ball was hit, and the image frame corresponding to the point in time can be determined to be the searched trigger index (K).

Referring back to FIG. 3, when it is determined that the golf ball has been hit in step S300, the swing analysis apparatus 10 collects and stores the image information acquired by the camera (S400, YES).

Conversely, if it is not determined that the golf ball has been hit in step S300, the swing analysis apparatus 10 may return to the step of checking the location information of the golf ball (S200, NO).

After step S400, the swing analysis device 10 analyzes the corresponding image frame and outputs the analysis result to the display unit 500 (S500). Specifically, the swing analysis device 10 stores angle information or position information on any one or more of the user's left and right shoulder joints, left and right hip joints, right wrists, and left wrists in the image frame corresponding to the trigger index K. It may be measured, and the measured angle information or location information may be mapped to the whole body motion image acquired by the motion camera 210.

In this regard, FIG. 7 is an exemplary screen in which a golf swing image is output on the display unit 500 of the swing analysis apparatus 10 according to an embodiment of the present invention.

Referring to FIG. 7, the left is an image frame of a golf ball hitting image captured by the first or second trigger camera 110 or 120, and the right is an image frame of a user's whole body motion image captured by the motion camera 210. It can be seen that it appears as follows.

Specifically, the corresponding image frame is an image frame corresponding to the hit point of the golf ball retrieved by the swing analysis device 10, and numerical information on the user's whole body movement in the same image frame as the corresponding image frame, the angle of arm bending , Position information of the left pelvis, shoulders, and legs may be displayed.

So far, a method of detecting a hit of a golf ball according to an embodiment of the present invention has been described. According to the present invention, an image acquired by a high-speed camera can be analyzed frame-by-frame to search for an image frame at the moment the golf ball is hit, and by analyzing the user's movement in the image frame, the user corrects the golf swing posture by itself. can do.

Embodiments of the present invention have been described above with reference to the accompanying drawings, but those of ordinary skill in the art to which the present invention pertains can be implemented in other specific forms without changing the technical spirit or essential features. You will be able to understand. Therefore, it should be understood that the embodiments described above are illustrative and non-limiting in all respects.

10: golf swing motion analysis device
100: trigger unit
110: first trigger camera
120: second trigger camera
200: motion unit
210: motion camera
300: analysis processing unit
400: display
500: database

Claims (12)

A pair of trigger units including first and second trigger cameras disposed at the top of the front of the user positioned at the hitting position of the golf ball and acquiring a hitting image of the golf ball;
A motion unit including a motion camera for acquiring a whole body motion image of the user;
An analysis processing unit for analyzing a golf ball hitting image obtained by the trigger unit and a whole body motion image obtained by the motion unit; And
A display unit for outputting the user's swing posture analyzed by the analysis processing unit;
Golf swing motion analysis device comprising a. The method of claim 1,
The trigger unit,
Transmitting a photographing signal acquired from the first or second trigger camera to the other camera and motion camera,
The first and second trigger cameras and the motion cameras have the same image frame rate based on the photographing signal,
Golf swing motion analysis device. The method of claim 1,
The analysis processing unit,
Designating at least one photographing attribute of the photographing position of the first and second trigger cameras, rotation information, the predicted hitting position of the golf ball, and the motion speed,
Golf swing motion analysis device. The method of claim 1,
The analysis processing unit,
By dividing the golf ball hitting image acquired by the trigger unit into image frames, detecting a golf ball-shaped object within the divided image frame, and checking a change in coordinates within a continuous image frame of the detected object, To check whether it's ready to hit the golf ball,
Golf swing motion analysis device. The method of claim 1,
The analysis processing unit,
Detecting an image frame at the moment the golf ball is hit based on the number of total image frames of the hitting image of the golf ball or the whole body motion image and a coordinate change value of the detected object,
Golf swing motion analysis device. The method of claim 5,
The analysis processing unit,
In the image frame hit by the golf ball, angle information or position information on one or more of the user's left and right shoulder joints, left and right hip joints, right wrists, and left wrists is measured, and the measured angle information or position information is the Mapping to the whole body motion image acquired by the motion unit,
Golf swing motion analysis device. Setting, by the golf swing motion analysis apparatus, shooting properties of a golf ball and at least two or more cameras for photographing a user positioned at a striking position of the golf ball;
Checking, by the golf swing motion analysis apparatus, location information of a golf ball in an image frame of an image acquired by the camera;
Determining, by the golf swing motion analysis apparatus, whether the golf ball whose location information is confirmed is hit based on the image acquired by the camera; And
Collecting and storing image information acquired by the camera when it is determined that the golf swing motion analysis apparatus has been hit by the golf ball;
Method for detecting the hit of the golf ball comprising a. The method of claim 7,
At least two or more cameras,
It includes at least two or more of a first and a second trigger camera that is disposed at the top of the front of the right-handed or left-handed user to obtain a hitting image of the golf ball, and a motion camera that obtains a whole body motion image,
The step of setting the shooting properties,
In the step of setting at least one or more photographing properties of the first and second trigger cameras or image frames of the motion camera, photographing position, rotation information, predicted hitting position of the golf ball, and motion speed,
How to detect the hit of a golf ball. The method of claim 7,
Checking the location information of the golf ball,
Checking whether an object in the shape of a golf ball exists in the image frame acquired by the camera;
Determining whether a golf ball is prepared based on a coordinate change value of the golf ball in a continuous image frame when it is determined that there is an object in the shape of a golf ball; And
When it is determined that the golf ball is ready, checking position information of at least one of a coordinate value of a golf ball, a size of a golf ball, and a pixel value in the image frame;
Method for detecting the hit of the golf ball comprising a. The method of claim 7,
The step of determining whether the golf ball is hit,
Checking the total number of image frames of the image acquired by the camera; And
Sequentially assigning an index to the identified image frame and searching for a trigger index;
Method for detecting the hit of the golf ball comprising a. The method of claim 10,
The step of searching for the trigger index,
Assuming an image frame belonging to an intermediate value among the identified image frames as a trigger index, and
Comparing a coordinate change value of the golf ball and a size of the golf ball in the assumed index image frame to determine whether the assumed index image frame corresponds to a hitting point of the golf ball;
Method for detecting the hit of the golf ball comprising a. The method of claim 7,
After the step of collecting and storing the image information,
Measuring angle information or position information on any one or more of the user's left and right shoulder joints, left and right hip joints, right wrists, and left wrists in the index image frame; And
Mapping the measured angle information or location information to the image information and outputting it to a display unit;
Method for detecting the hit of the golf ball further comprising.

Images