JP2020074920A - Trial hitting data acquisition system and trial hitting data acquisition method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To discriminate the type of a golf club to be tried and to record and save the trial hit data associated with the discriminated type when the golf ball is tried to hit with a golf club. A trial hit data acquisition system includes a trial hit measuring device that measures the behavior of a golf club or a golf ball, a feature point detection sensor that detects the occurrence of feature points during a golf swing, and a trial hit measuring device. A processing device for calculating data and an imaging device for imaging the golf club head before hitting are provided. In the processing device, the golf is obtained from an image in which the time difference between the timing of detecting the feature point based on the detection signal from the feature point detection sensor and the timing of imaging of the golf club head is within a predetermined range. The type of the golf club is determined by taking out the first appearance feature information of the club head. The discriminated type of golf club is associated with the test hit data obtained from the measuring device, and the test hit data is recorded and saved. [Selection diagram] Fig. 2

Description

  The present invention relates to a trial hit data acquisition system and a trial hit data acquisition method for obtaining trial hit data when a golf ball is hit by a golf club.

  In recent years, in a shop that sells golf clubs, a person who wants to purchase a golf club tries to hit the golf club, classifies the golf swing using the trial hit data that is the result of the hit, and provides an appropriate golf club. There is a golf club fitting system available. In this fitting system, it is also possible to confirm whether or not this golf club is appropriate from the trial hit data of the golf club to be hit.

Such a golf club fitting system obtains trial hit data by measuring the behavior of the golf club and the behavior of the hit golf ball. The behavior of a golf club or a hit golf ball during golf swing is measured using an image captured by an image capturing device (camera).
For example, an optical sensor is widely used for photographing a golf ball that is hit and moves at high speed. As an example of a golf ball shooting method using an optical sensor, when shooting a golf ball that starts moving by hitting, the detection range of the optical sensor is set on the moving path of the golf club head, There is a method of taking an image by using the passage of as a trigger. In addition, while continuously shooting the golf swing by the trainee, the ball sensor detects the presence or absence of the golf ball on the tee, and when it detects that there is no golf ball on the tee after the start of shooting, it outputs a trigger signal. There is known a method of stopping shooting after a predetermined time has elapsed from the output of a trigger signal (Patent Document 1).

JP-A-5-15628

  It is possible to obtain the trial hit data by measuring the behavior of the golf club or the golf ball by such a method. At this time, the operator who measures the trial hit before and after the trial hit of the golf ball by the golf club is the product name (maker name, model name, model number, etc.) of the golf club and its specifications (count, loft angle, flex level of the shaft). , The torque level, etc.) can be input to the trial hit measuring device to identify the golf club used for the trial hit, and the trial hit data can be associated with the specified golf club. Can be managed. However, since the operator has to input the identification information so that the golf club can be specified each time the measurement is performed, the input may be ignored or forgotten and the test shot measurement may be performed. In this case, it is unclear what kind of golf club and what kind of golf club was used to make the trial hit in the trial hit data, and the trial hit data cannot be effectively used at a later date. In addition, the identification information may be erroneously input. If at least the type of golf club is associated with the trial hit data, the trial hit data can be effectively used at a later date. Here, the type of golf club means, for example, a driver (1 or 1W), a spoon (3 or 3W), a creek (5 or 5W), a utility, etc. If it is a system, 3 iron (3I), 4 iron (4I), 5 iron (5I), ..., pitching wedge (PW), approach wedge (AW or P / S), and sand This means a wedge (SW) or the like, and these golf clubs can be identified by the appearance feature amount such as the size and shape of the golf club head.

On the other hand, the identification information for identifying the golf club used for the trial hit is recorded and held in the RF tag provided in the golf club, and the recorded and held identification information is read by the RF tag reader and associated with the trial hit data. Can However, when the golf club is hit with a trial, it is troublesome to bring the golf club provided with the RF tag close to the RF tag reader to perform the reading process, and in some cases, this operation may be omitted. ..
In addition, when various golf clubs are changed and a trial shot is made, various golf clubs are placed near the measurement location of the trial shot. Therefore, in many cases, a plurality of pieces of identification information are read by an RF tag reader at one time. In some cases, it may not be possible to identify which golf club was used for the trial hit.

  In view of the above, the present invention determines at least the type of golf club to be hit, without using an RF tag as in the conventional case when hitting a golf ball with a golf club, and outputs the hitting data associated with the determined type. An object of the present invention is to provide a trial hit data acquisition system and a trial hit data acquisition method that can be recorded and saved.

One aspect of the present invention is a trial hit data acquisition system for obtaining trial hit data when a golf ball is hit by a golf club. The trial hit data acquisition system is
A test shot measuring device for measuring at least one of the behavior of the golf club head of the golf club and the behavior of the hit golf ball when the golf ball is hit by a trial,
At the time of trial hitting with the golf club, a feature point detection sensor that detects the occurrence of feature points during a golf swing,
A processing device for calculating trial hit data relating to the behavior from measurement by the trial hit measurement device,
An imaging device for imaging the golf club head before hitting the golf ball,
The processing device is
A test shot data calculation unit for calculating test shot data from measurement by the test shot measuring device,
A feature point acquisition unit that acquires the timing of detection of the feature point using a detection signal from the feature point detection sensor,
Of the images of the golf club head captured by the image capturing device, from the image in which the time difference between the detection timing of the feature point and the image capturing timing is within a predetermined range, An image determining unit that extracts first appearance feature information and determines the type of the golf club based on the first appearance feature information;
A recording unit that records and saves the trial hit data in association with the type of the determined golf club and the trial hit data.
Equipped with.

The imaging device images the golf club head together with the golf ball before hitting,
The first appearance feature information includes a size of the golf club head,
The image discriminating unit discriminates the type of the golf club distinguished by the size of the golf club head by comparing the size of the golf ball and the size of the golf club head in the image. Is preferred.

The first appearance feature information includes a shape of an image of the golf club head,
It is preferable that the image discriminating unit discriminates the types of the golf clubs that can be discriminated by the shape of the golf club head from the shape of the image of the golf club head in the image.

The recording unit holds in advance reference images of a plurality of golf club heads having at least one second appearance feature information of a pattern, a symbol, and a color, which can be associated with the model name or model number of the golf club head. And
The image discriminating unit matches the image of the golf club head in the image captured by the image capturing device with the second appearance feature information of each of the reference images, so that the golf used for the trial hit Get the model name or model number of the club head,
In addition to the type of the golf club, the recording unit preferably records and stores the model name or the model number and the trial hit data in association with each other.

  The second appearance characteristic information is formed on the contour shape of the golf club head, the pattern of score lines provided on the face surface of the golf club head, the arrangement of punch marks provided on the face surface, and the face surface. It is preferable to include at least one of a decorative pattern and a logo mark provided on the golf club head.

  It is preferable that the trial hit data calculation unit sets processing parameters for calculating the trial hit data from a measurement result of behavior of a golf club head of the golf club according to the determined type of the golf club.

  It is preferable that the test shot measuring device changes measurement conditions for measuring a behavior of the golf ball after being hit, according to a type of the golf club that has been determined.

  It is preferable to provide an analysis device that analyzes the behavior of the golf ball by using the test hit data associated with the type of the golf club and classifying the golf club according to the type.

The imaging device images a moving image of the golf ball and the golf club head,
The image used to determine the type of the golf club is a plurality of images that continuously include the image of the golf club for a predetermined time,
The first appearance feature information includes an appearance feature amount,
It is preferable that the image discriminating unit discriminates the type of the golf club by using an average value or a median value of the appearance feature amounts in the plurality of images.

Another aspect of the present invention is a trial hit data acquisition system that obtains trial hit data when trial hitting a golf ball with a golf club. The trial hit data acquisition system is
A test shot measurement including an image pickup device for picking up an image of a golf club head or a golf ball, and measuring at least one of a behavior of the golf club head of the golf club and a behavior of the hit golf ball when the golf ball is tried. A device,
At the time of trial hitting with the golf club, a feature point detection sensor that detects the occurrence of feature points during a golf swing,
And a processing device that calculates trial hit data relating to the behavior from measurement by the trial hit measurement device.
The processing device is
A test shot data calculation unit for calculating test shot data from measurement by the test shot measuring device,
A feature point acquisition unit that acquires the timing of detection of the feature point using a detection signal from the feature point detection sensor,
Among the images of the golf club head before hitting the golf ball captured by the imaging device, an image in which a time difference between the detection timing of the characteristic point and the imaging timing of the image is within a predetermined range. From the first appearance feature information of the golf club head, and an image determination unit that determines the type of the golf club based on the first appearance feature information,
A recording unit that records and saves the trial hit data in association with the type of the determined golf club and the trial hit data.
Equipped with.

Another aspect of the present invention is a trial hit data acquisition method for obtaining trial hit data when a golf ball is hit by a golf club. The trial hit data acquisition method is
A step of measuring at least one of the behavior of the golf club head of the golf club and the behavior of the hit golf ball when trial hitting the golf ball to obtain trial hit data;
Detecting the occurrence of feature points during a golf swing during a trial hit by the golf club,
Imaging the golf club head before hitting the golf ball;
From the image of the captured golf club head, the first appearance feature of the golf club head from an image in which the time difference between the detection timing of the feature point and the capture timing of the image is within a predetermined range. Extracting information, and determining the type of the golf club based on the first appearance feature information,
And a step of recording and storing the trial hit data in association with the determined type of the golf club and the trial hit data.

In the trial hit data acquisition method,
A reference image of a plurality of golf club heads having at least one second appearance feature information among patterns, symbols, and colors, which can be associated with the model name or model number of the golf club, is stored in the memory in advance,
In the step of determining the type of the golf club, the image of the golf club head in the captured image is matched with the second appearance feature information of each of the reference images, so that the golf used in the trial hit Get information on the model name or model number of the club,
It is preferable that the step of recording and saving includes the step of recording and saving the acquired model name or model number and the trial hit data in association with each other.

  According to the above-described trial hit data acquisition system and trial hit data acquisition method, at the time of trial hitting a golf ball with the golf club, at least the kind of the golf club to be hit is determined without using an RF tag as in the conventional case, and the determination is made. It is possible to record and save the trial hit data associated with the selected type.

It is a figure explaining the trial hit data acquisition system of one embodiment. It is a block diagram which shows an example of a structure of the trial hit data acquisition system shown in FIG. (A), (b) is a figure which shows the example of the attachment place of the marker attached to a golf club head. (A) is a figure which shows an example of three types of markers provided in a golf ball, (b) is a figure which shows an example of movement of the marker of a moving golf ball.

  Hereinafter, a trial hit data acquisition system and a trial hit data acquisition method according to an embodiment will be described in detail.

(Outline of acquisition of trial hit data)
Acquisition of trial hit data when a golf ball is hit by a golf club according to one embodiment is performed according to the following flow.
(1) At the time of trial hitting a golf ball, in order to bring the golf club into an address state, the golf club head is set at a predetermined position behind the striking direction of the golf ball, and the golf swing operation is started. At this time, the golf club head is imaged by the golf club head imaging device. The golf club head imaging device is provided so as to face the opposite side of the person who performs golf swing from the position of the golf ball, together with the trial hitting measurement device that measures the behavior of the golf club and the golf ball. In the golf club head imaging device, the imaging area is set so as to include the position of the golf club head when addressing. The golf club head image pickup device obtains a plurality of images by being imaged at a constant frame rate.

(2) At the time of hitting the golf ball after starting the golf swing, at least one of the behavior of the golf club head and the behavior of the golf ball is measured by the trial hit measuring device to obtain trial hit data. The behavior of the golf club head or the behavior of the golf ball can be measured using a known measuring method and measuring system. Examples of the measuring method and the measuring system include the measuring method and the measuring system described in JP-A-2005-34619, JP-A-2009-45495, JP-A-2010-042086, and JP-A-2017-22440. You can The trial hit data includes, for example, the face speed of the golf club head immediately before hitting the golf ball, the vertical approach angle of the golf club head immediately before hitting the golf ball, the horizontal approach angle of the golf club head immediately before hitting the golf ball, and the dynamic loft. , Face angle, lie angle, vertical golf ball hitting position on golf club head face surface, left and right golf ball hitting position on golf club head face surface, golf ball speed (initial speed), golf ball vertical hitting Angle, left and right launch angle of golf ball, back spin amount of golf ball, and side spin amount of golf ball.

(3) At the time of trial hitting with a golf club, the occurrence of identifiable feature points in the golf swing is detected. The characteristic points are, for example, hitting a golf ball, the golf club passing a position detected by the position sensor when the golf swing takes back, or the golf club passing a position detected by the position sensor when the golf swing is downswing. It is to be. The impact speed of a golf ball is suddenly determined from the measurement results of the behavior of the golf club head (measurement data of a Doppler radar velocimeter, processing data calculated from the trajectory of the golf club head continuously shot by a high-speed camera or multiple exposure). It can be detected as the time when the value has dropped to. In addition, from the result of measurement of the moving speed of the golf ball (measurement data of the Doppler radar velocimeter, processing data calculated from the trajectory of the golf club head continuously photographed by the high-speed camera or multiple exposure), the hitting starts from 0 It can be detected as a point of time when it suddenly rises. Further, the hit can be detected as the time when the detection sensor for detecting the presence or absence of the golf ball placed on the tee changes from the presence of the golf ball to the absence thereof. The hit can also be detected as the time at which the hit signal obtained by hitting the golf ball with the microphone is obtained.

(4) Further, there is a time difference between the detection timing of the detected feature point in the image of the golf club head imaged by the golf club head imaging device and the timing of image capture by the golf club head imaging device. First appearance feature information of the golf club head is extracted from an image in a predetermined range, and the type of golf club is determined based on the first appearance feature information. In the trial hit measuring device, when the behavior of the golf club head or the golf ball is measured by imaging the golf club head or the golf ball with the imaging device, the imaging device of the trial hit measuring device can be used as the golf club head imaging device. ..

  As an example, at the time of addressing, the golf club is in a stationary state or a substantially stationary state (including a waggle state) for at least a certain period. Therefore, during this address, the golf club head imaging device is stationary or substantially stationary. An image of the golf club head that is present is taken. After that, the golf ball is hit through the take-back and the down swing, and with the hit of the golf ball as a feature point, the time difference (elapsed time) between the timing of capturing the image of the golf club head and the timing of detecting the hit. ) Can be used to obtain, for example, an image of the golf club head at the time of addressing, from a plurality of images of the golf club head to be hit. Since the time from the start of addressing to the point of impact is often within 5 seconds, for example, an image of the golf club head in the addressing state can be acquired.

  In addition to striking, the characteristic point is that the golf club passes the position detected by the position sensor when the golf swing takes back, or the golf club passes the position detected by the position sensor when the golf swing is downswing as described above. It can also be done. In this case as well, the identification information of the golf club to be hit can be appropriately specified by using the time difference between the detection timing of the characteristic point and the timing of reading the identification information.

(5) The first appearance feature information of the golf club head is extracted from the image of the golf club head in the address state, and the type of golf club, for example, the count is determined. The first appearance feature information includes at least information about the size of the golf club head or the shape of the golf club head. The acquisition of the image of the golf club head can be performed by, for example, extracting a pixel having a pixel value in a specific range corresponding to the golf club head from a pixel having a pixel value corresponding to the background. The total number of extracted pixels may be the size of the golf club head. Further, when the golf ball before hitting is imaged together with the golf club head, a pixel having a pixel value in a specific range corresponding to the golf ball in the image is a pixel having a pixel value corresponding to the golf club head and the background. Alternatively, the total number of extracted pixels may be set as the size of the golf ball, and the ratio of the size of the golf club head to the size of the golf ball may be set as the size of the golf club head. Further, when the imaging area of the imaging device is fixed and an image of the same angle of view can be constantly captured, it is not necessary to extract the size ratio of the golf club head with respect to the golf ball. The type of golf club may be determined based on the total number of corresponding pixels.
Further, from the region of the image of the extracted golf club head, the image of the cylindrical socket portion into which the golf club shaft of the golf club head is inserted is obtained by removing the image of the extracted golf club head from the crown portion and the side. Information on the contour shape of the image of the portion may be used as the first appearance feature information. In the case of a wood type golf club, the contour shape of the crown portion greatly differs depending on the type, and therefore the type of golf club can be determined from the contour shape of the image of the extracted crown portion. The contour shape can be characterized by, for example, an inclination angle or a curvature of a curve. Also, the aspect ratio of the images of the crown portion and the side portion can be used as the first appearance feature information.

(6) Finally, the type of golf club that has been discriminated is associated with the trial hit data, and the trial hit data is recorded and saved in the recording unit.
As described above, among the images of the golf club head captured by the image capturing apparatus, the image in which the time difference between the feature point detection timing and the golf club head imaging timing is within a predetermined range is selected from the golf club head images. Of the first appearance characteristic information is extracted, the type of the golf club is discriminated based on the first appearance characteristic information, and the type of the determined golf club is associated with the trial hit data, and the trial hit data is recorded and saved. Different from the conventional golf swing, the type of golf club is discriminated without performing the operation for reading the identification information of the golf club used for the trial striking, and the trial striking data associated with the discriminated type is recorded. Can be saved. As a result, the golf club manufacturer will later organize the trial hit data for each type of golf club, and analyze the trial hit data for each type of golf club to design a golf club suitable for various types of golfers. It can be used as information for doing.

(Trial data acquisition system)
FIG. 1 is a diagram illustrating a trial hit data acquisition system 10 that executes a trial hit data acquisition method according to an embodiment.
The trial hit data acquisition system 10 (hereinafter, referred to as system 10) is used when a trial hitter (hereinafter, golfer) G holds the golf club 24, swings the golf ball, and hits the golf ball b in the direction a. It has a function of measuring the behavior of the golf club head 28 before and after hitting (before and after impact) and the behavior of the golf ball b after hitting (after impact).
In the system 10, the behavior of the golf ball b and the behavior of the golf club head 28 are measured every time the golfer G hits one golf ball b.

The system 10 includes a trial hit measurement device 14, a hit detection sensor 15 (feature point detection sensor),
It mainly has a golf club head imaging device 16, a processing device 18, a display 30, and an operation unit 32. FIG. 2 is a block diagram showing an example of the configuration of the trial hit data acquisition system 10. The processing device 18 is configured by a computer and includes a CPU 20 and a memory (recording unit) 22. The processing device 18 is connected to the display 30 and the operation unit 32.
The display 30 displays the trial hit result of the golf club on the screen, and also displays the setting screen for setting the processing content for calculating the trial hit data.
The operation unit 32 is a mouse and a keyboard, and is used by an operator to input an instruction of the above-described processing content, an instruction of a screen for displaying a trial hit result, or the like.

  In the processing device 18, the CPU 20 calls and activates a software application stored in a ROM (not shown) to activate a trial hit data calculation unit 18a, a feature point acquisition unit 18b, and an image determination unit 18c, which will be described later. That is, the trial hit data calculation unit 18a, the feature point acquisition unit 18b, and the image determination unit 18c are software modules configured by calling and starting a software application.

  The trial hit measuring device 14 has a golf club head behavior detection unit 14a and a golf ball behavior detection unit 14b.

  The golf club head behavior detection unit 14a is a part that measures the behavior of the golf club head 28 during a trial hit. By measurement, for example, the face speed of the golf club head 28 immediately before hitting the golf ball, the vertical approach angle of the golf club head 28 immediately before hitting the golf ball, the lateral angle of approach of the golf club head 28 just before hitting the golf ball, The dynamic loft, the face angle, the lie angle, the vertical golf ball hitting point position on the face surface of the golf club head 28, and the horizontal golf ball hitting point position on the face surface of the golf club head 28 can be obtained as trial hit data.

The golf club head behavior detection unit 14a includes a high-speed camera that continuously captures, in a short period of time, the golf club head 28 that passes through the shooting range of the hitting position of the golf ball from oblique information. The captured image of the golf club head 28 is sent to the trial hit data calculation unit 18a. The trial hit data calculation unit 18a calculates the above-described trial hit data by calculating the position and orientation of the golf club head 28 at fixed time intervals by performing image processing on the captured image and calculating the time and time series data.
The golf club head behavior detection unit 14a uses a high-speed camera to capture an image of one golf club head 28, as well as the strobe light source intermittently a plurality of times when capturing one frame image. Is turned on and a multiple-exposure imaging mode is used to obtain a plurality of moving images of the golf club head 28, or a camera equipped with a high-speed shutter is used to open and close the shutter a plurality of times at high speed when obtaining one frame of image. Then, it is also possible to use an imaging mode in which a plurality of moving images of the golf club head 28 are obtained.
Such behavior of the golf club head 28 can be measured by imaging the golf club head 28 with three markers attached to the golf club head 28 at different positions. The marker is attached to a predetermined position. Specifically, the trial hit data calculation unit 18a extracts the image of the marker from the captured image of the golf club head 28, obtains the center position of each of the three markers on the captured image, and the information about the center position, The information on the position and orientation of the golf club head 28 can be calculated from the information on the predetermined marker attachment position. Thereby, the trial hit data calculation unit 18a can calculate the above-described trial hit data of the golf club head 28. FIGS. 3A and 3B are diagrams showing examples of the attachment positions of the markers M1 to M3 to be attached to the golf club head 28 (iron type golf club head and wood type golf club head).

  The golf ball behavior detection unit 14b is a part that measures the behavior of the golf club ball immediately after hitting. By the measurement, for example, the golf ball speed (initial velocity), the vertical launch angle of the golf ball, the horizontal launch angle of the golf ball, the back spin amount of the golf ball, and the side spin amount of the golf ball are calculated as trial hit data. The golf ball behavior detection unit 14b further calculates carry, lateral deviation, and total distance as trial hit data.

The golf ball behavior detection unit 14b includes a high-speed camera that images the golf ball b moving within the shooting range immediately after the hitting of the golf ball at least twice in a short time. The captured image of the golf ball b is sent to the trial hit data calculation unit 18a. The trial hit data calculation unit 18a performs image processing on the picked-up image to calculate the position and orientation of the golf ball b for each picked-up image, and uses the calculation results to calculate the ball speed (initial velocity) and launch angle of the golf ball b. , And the spin amount are calculated as trial hit data.
The golf ball behavior detection unit 14b uses a high-speed camera to capture an image of one golf ball b, and in addition to capturing an image of one frame, the strobe light source is intermittently turned on a plurality of times. Then, in the multiple-exposure imaging mode in which a plurality of moving images of the golf ball b are obtained, or when a frame of image is obtained, a camera equipped with a high-speed shutter is used to open and close the shutter a plurality of times at high speed, It is also possible to use an imaging mode in which a plurality of moving images of the golf ball b are obtained.
Such behavior of the golf ball b can be measured by capturing an image of the golf ball b moving with different types of markers attached to different positions on the surface of the golf ball b. The marker is attached to a predetermined position. Specifically, the trial hit data calculation unit 18a extracts the image of the marker from the captured image, obtains the center position of each of the three markers on the captured image, and based on the positional deviation between the captured images at this center position, The movement amount and the rotation amount of the golf ball b are calculated, and the ball speed (initial velocity), the launch angle, and the spin amount are calculated from the calculation results. In addition, the trial hit data calculation unit 18a can calculate the lateral moving speed of the golf ball b by obtaining the change in the size of the contour of the golf ball b between the captured images, and the hit of the golf ball b can be calculated. Right and left launch angle is calculated. Thereby, the trial hit data calculation unit 18a can calculate the trial hit data of the golf ball. FIG. 4A is a diagram showing an example of three types of markers M1 to M3 provided on the golf ball b. FIG. 4B is a diagram showing an example of movement of the markers M1 to M3 of the moving golf ball b.
The trial hit data calculation unit 18a sends the calculated trial hit data to the image determination unit 18c.

The timing of occurrence of the hit of the golf ball b is obtained using the hit detection unit 15 and the feature point acquisition unit 18b.
The hit detection unit 15 is a sensor that detects the presence or absence of the golf ball b placed on the tee, and generates a detection signal at the time when the golf ball b changes from having the golf ball b to not having the golf ball b. Send to.
The feature point acquisition unit 18b receives the detection signal and sends the detection signal generation time to the image determination unit 18c as information on the timing of the impact point.

  In order to associate the trial hit data obtained by the trial hit of the golf ball b with the golf club 24 with the type of the golf club 24, the system 10 associates the information about the type of the golf club 24 with the calculated trial hit data.

  Specifically, the system 10 is provided with a golf club head imaging device 16 at a trial hit location of the golf club 24. The golf club head imaging device 16 images the golf club head 28 before hitting the golf ball. The golf club head imaging device 16 images a moving image at a constant frame rate, for example. The golf club head imaging device 16 images the range in which the golf club head 28 is located at the address as an imaging area, so that the golf club head at the address can be reliably imaged. At the time of image capturing, the image capturing time is also recorded at the same time. The captured image is sent to the image determination unit 18c together with the information on the capturing time. The information on the image capturing time is treated as the information on the image capturing timing. As shown in FIG. 2, the golf club head image pickup device 16 in the present embodiment is a different device from the image pickup devices of the golf club head behavior detection unit 14a and the golf ball behavior detection unit 14b, but in one embodiment According to this, as the golf club head imaging device 16 for imaging the golf club head 28 before hitting the golf ball, the imaging device of the golf club head behavior detection unit 14a or the golf ball behavior detection unit 14b can be used.

The image determination unit 18c detects the timing of detecting a hit point (feature point) in the image of the golf club head 28 captured by the golf club head imaging device 16 and the image of the golf club head 28 captured by the golf club head imaging device 16. The first appearance feature information of the golf club head 28 is extracted from the image in which the time difference from the timing is in a predetermined range, and the type of golf club is determined based on the first appearance feature information.
An image in which the time difference between the timing of detecting a hit point (feature point) and the timing of capturing an image is within a predetermined range is, for example, 0.5 seconds to several seconds backward from the time when the hit point is detected. 3 is an image with the golf club head 28 captured within a time range of FIG. Since the golf club head is set for addressing before hitting within the time range of 0.5 seconds to several seconds, for example, from the time when the hitting point is detected, the golf club head imaging device 16 remains stationary in the addressing state. An image of the golf club head 28 that is playing can be captured. Therefore, the image determination unit 18c can reliably acquire the image of the golf club head 28 in the address state. The image discrimination unit 18c extracts the image of the golf club head 26 by performing image processing on this image.

As an example, the image of the golf club head 28 is obtained by dividing pixels having pixel values in a specific range corresponding to the golf club head 28 in the image from pixels having pixel values corresponding to a green background such as artificial grass. To extract. The pixel value of the specific range corresponding to the golf club head 28 is, for example, a wood-based golf club, the crown portion of the golf club head 28 is painted black, and an iron-based golf club has a metal color. An image of the golf club head 28 can be extracted by searching for pixel values corresponding to these colors.
The first appearance feature information of the golf club head 28 includes at least information about the size of the golf club head 28 or the shape of the golf club head 28.
For example, the total number of pixels of the extracted image of the golf club head 28 may be the size of the golf club head 28. A crown portion obtained by removing the image of the cylindrical socket portion into which the golf club shaft 26 of the golf club head 28 is inserted from the extracted image area of the golf club head 28 from the extracted image of the golf club head 28. Information on the contour shape of the image of the side portion can also be used as the first appearance feature information. In the case of a wood-based golf club, the above-described contour shape greatly differs depending on the type, and therefore the type of golf club can be determined from the contour shape of the extracted image of the crown portion. The contour shape can be characterized by, for example, the inclination angle of the curve representing the contour or the curvature of the curve. Also, the aspect ratio of the images of the crown portion and the side portion can be used as the first appearance feature information.
The image determining unit 18c determines the type of golf club based on the extracted first appearance feature information. For example, a reference table in which the first appearance feature information and the type of golf club are associated with each other is held in advance, and the type of golf club is determined by referring to this reference table from the extracted first appearance feature information. be able to.

The image discrimination unit 18c records the trial hit data in the memory 22 in association with the decided golf club type and the trial hit data.
In this way, among the images of the golf club head 28 imaged by the golf club head imaging device 16, the image in which the time difference between the timing of detecting the hitting point and the image capturing timing is within a predetermined range, The first appearance feature information of the golf club head 28 is taken out, the type of the golf club 24 is determined based on the first appearance feature information, and the determined type of the golf club 24 and the trial hit data are associated with each other to obtain the trial hit data. Keep a record. As in the past, apart from golf swing, it is possible to determine the type of golf club without performing the operation for reading the identification information of the golf club used for the trial hit, and the trial hit data associated with this information can be obtained. It can be reliably acquired and recorded and saved.

  As described above, the first appearance feature information includes the size of the golf club head. In this case, according to one embodiment, when the golf club head imaging device 16 images the golf club head 28 together with the golf ball b before hitting, the image determination unit 18c determines the size of the golf ball b in the image. It is preferable to determine the type of the golf club 24 that can be distinguished by the size of the golf club head 28 by comparing the size of the golf club head 28. Even if the image pickup position of the golf club head image pickup device 16 changes and the image size of the imaged golf club head changes, the size of the golf club head can be known by relative comparison with the golf ball. For example, since the size of the image of the golf club head 28 can be known from the ratio of the size of the image of the golf club head 28 to the size of the image of the golf ball b, the type of the golf club 24 can be specified accurately. be able to.

  In addition, the first appearance feature information includes the shape of the image of the golf club head 28, and the image determination unit 18c determines the types of the golf clubs 24 that can be distinguished by the shape of the golf club head 28 in the image. It is preferable to make the determination based on the shape of the image. In particular, in the case of a wood-based golf club, the shape is different for each count, so that it can be easily identified.

According to one embodiment, the memory (recording unit) 22 has a plurality of second appearance feature information having at least one of a pattern, a symbol, and a color that can be associated with the model name or model number of the golf club 24. It is preferable to previously hold a reference image of the golf club head. At this time, the image determination unit 18c calls the reference image stored in the memory 22 for the image of the golf club head 28 in the image captured by the golf club head imaging device 16, and determines the first image in each reference image. By performing matching with the 2 appearance feature information, it is possible to obtain information on the model name or model number of the golf club 24 used for the trial hit. Therefore, in this case, it is preferable that the image determination unit 18c record and store the acquired model name or model number and the trial hit data in the memory 22 in association with each other in addition to the type of the golf club 24. In this way, by associating the model name or model number with the trial hit data, the trial hit data is finely classified for each model name or model number of the golf club, and the classified trial hit data is analyzed to identify the failure of the golf club, etc. Alternatively, it can be extracted for each model number and this information can be used as information for improving the golf club.
In the case where the reference image held in advance is an image of the face surface of the golf club viewed from the front, the reference image and the image of the golf club head 28 are matched. It is preferable to perform image processing on the reference image to perform matching so as to match the imaging direction of the device 16.

The second appearance feature information is the contour shape of the golf club head 28, the pattern of score lines provided on the face surface of the golf club head 28, the form of punch marks provided on the face surface, and the decoration formed on the face surface. It is preferable to include at least one of the pattern and the logo mark provided on the golf club head 28. The score line is a plurality of lateral grooves carved on the face surface that efficiently generate backspin on the golf ball b, and the length and number of lateral grooves differ depending on the model name or model number. The punch marks are concave dimples with a circular or polygonal appearance applied to the face surface, and the number of punch marks and the arrangement form thereof differ depending on the model name or model number. The score lines and punch marks are those described in Appendix II (Club Design) of the Golf Rules of the Japan Golf Association. The decorative pattern formed on the face surface is a visually recognizable pattern formed by changing hue, saturation, or brightness, and can be combined with a score line or punch mark.
Pattern matching is performed between the reference image and the image of the golf club head 28 captured for at least one of the contour shape, the score line pattern, the punch mark arrangement pattern, the decorative pattern formed on the face surface, and the logo mark. As a result, the model name or model number of the golf club 24 used for the trial hit can be acquired. By performing pattern matching by combining some of the contour shape, the score line pattern, the punch mark arrangement pattern, the decorative pattern formed on the face surface, and the logo mark, the model name of the golf club 24 used for the trial hit or The model number information can be acquired with high accuracy.

  In order to perform pattern matching accurately using the pattern of score lines on the face surface, the arrangement form of punch marks, and the decorative pattern formed on the face surface, it is preferable to image the entire face surface. However, since the golf ball b exists on the front surface of the face surface in the address state, it is difficult to image the entire face surface. Therefore, the golf club head image pickup device 16 is preferably arranged so that the face surface of the golf club head 28 is imaged in a wide range. For example, it is preferable to take an image from the tilt direction on the front side of the face surface so that the golf ball b does not hide the face surface.

According to one embodiment, the trial shot data calculation unit 18a sets the processing parameter for calculating the trial shot data from the measurement result of the behavior of the golf club head 28 according to the type of the golf club 24 discriminated by the image discrimination unit 18c. It is preferable to set.
The processing parameter is, for example, as shown in FIGS. 3A and 3B, information on the attachment positions of the markers M1 to M3 to be attached to the golf club head 28. The positions where the markers M1 to M3 are attached to the golf club head are predetermined. The positions where the markers M1 to M3 are attached vary depending on the type and specifications of the golf club 24. The positions where the markers M1 to M3 are attached are recorded and held in the memory 22 in advance in accordance with the type of the golf club 24. Therefore, the trial hit data calculation unit 18a can call and acquire the information on the positions where the markers M1 to M3 are attached from the memory 22 by using the identified type of the golf club 24. Therefore, it is possible to calculate the trial hit data of the golf club head 28 before the hit using the information of the positions where the markers M1 to M3 are attached. The information on the attachment positions of the markers M1 to M3 may be acquired immediately before the golf ball b is hit, or may be acquired within a short time after the hit, and at least each time a trial hit is made, the golf club head. It is only necessary to be able to calculate 28 trial hit data.

  In addition, according to one embodiment, it is preferable that the trial hitting measurement device 14 changes the measurement condition for measuring the behavior of the golf ball b after being hit according to the determined type of golf club. The golf club 24 has different vertical launch angles and ball speeds (initial speeds) between the iron-based golf clubs and the wood-based golf clubs, and also between the iron-based golf clubs and the counts. The time timing of the image pickup and the image pickup visual field range of the image pickup are different with reference to the hitting point when the golf ball b is shot by the unit 14b. Therefore, the trial hit data calculation unit 18a acquires the type of the golf club 24 from the image determination unit 18c before starting the measurement of the behavior of the golf ball b, and according to this information, the golf ball behavior detection unit 14b. It is preferable to change the time timing of imaging and the visual field range of imaging. The change of the measurement condition may be instructed by the trial hit data calculation unit 18a or may be directly instructed by the CPU 20. In such a change of the measurement condition, when the image of the golf club head 28 is obtained with the hitting point as a characteristic point to determine the type of the golf club 24, the image pickup by the golf ball behavior detection unit 14b is not in time. Therefore, it is preferable to use, as the characteristic point, a time point when the golf club passes the detection position of the position sensor when the golf swing is taken back, or a time point when the golf club passes the detection position of the position sensor when the golf swing is downswing. ..

  In such a trial hit data acquisition system 10, the trial hit data recorded in the memory 22 and associated with the type of the golf club 24 is called by a separately provided analysis device via a network or the like, and the analysis device causes the golf ball to play golf. The behavior of the golf club head 28 or the golf ball b can be analyzed separately for each type of the club 24. That is, the trial hit data acquisition system 10 preferably includes an analysis device that analyzes the behavior of the golf ball b for each type of the golf club 24, using the trial hit data associated with the type of the golf club 24. .. By configuring the trial hit data acquisition system 10 in this way, the golf club manufacturer can organize the trial hit data for each type of golf club at a later date to design a golf club suitable for various types of golfers. It can be used as information.

  Since the golf club head imaging device 16 images the golf club head 28 at the address as a moving image, the image determination unit 18c can acquire a plurality of images of the golf club head 28 to be determined. In this case, when the first appearance feature information is the appearance feature amount, it is preferable to use the average value or the median of the appearance feature amounts obtained from the images of the plurality of golf club heads 28 as the first appearance feature information. That is, the golf club head imaging device 16 captures a moving image of the golf ball b and the golf club head 28, and the image used to determine the type of the golf club 24 is the image of the golf club head 28 continuously for a predetermined time. It is a plurality of images including. At this time, when the first appearance feature information includes an appearance feature amount that can be represented by a numerical value, the image determination unit 18c uses the average value or the median value of the appearance feature amounts in the plurality of images to determine the golf club 24. It is preferable to determine the type. As a result, the first appearance feature information with less error can be acquired.

In such a trial hit data acquisition system, the trial hit data is acquired by the following trial hit data acquisition method.
(1) At least one of the behavior of the golf club head 28 of the golf club 24 and the behavior of the hit golf ball b at the time of trial hitting the golf ball b is measured, and the trial hit data is acquired by the trial hit data calculation unit 18a. To do.
(2) At the time of trial hitting with the golf club 24, the occurrence of feature points during the golf swing is detected. The feature point is to hit the golf ball, that the golf club passes the detection position of the position sensor when the golf swing takes back, or that the golf club passes the detection position of the position sensor when the golf swing is downswing. including. When the hit point of the golf ball is used as the characteristic point, the hit detection unit 15 is used.
(3) The golf club head 28 before hitting the golf ball b is imaged by the golf club head imaging device 16.
(4) From the images of the captured image of the golf club head 28 in which the time difference between the detection timing of the characteristic point and the imaging timing of the golf club head 28 is within a predetermined range, the image determination unit 18c The first appearance feature information of the golf club head 28 is taken out, and the type of the golf club 24 used for the trial hit is determined based on the first appearance feature information.
(5) The trial hit data is recorded and stored in the memory 22 in association with the determined type of golf club 24 and the trial hit data.

When extracting the model name or model number of the golf club 24 used for the trial hit, a plurality of golf balls having at least one second appearance feature information of a pattern, a symbol, and a color that can be associated with the model name or model number of the golf club. The reference image of the club head is stored in the memory 22 in advance.
When determining the type of the golf club 24, by matching the image of the golf club head 28 in the captured image with the second appearance feature information of each reference image, the model name of the golf club 24 used for the trial hit. Alternatively, the model number information is acquired.
The acquired model name or model number is associated with the trial hit data and recorded and stored in the memory 22.

  Although the trial hit data acquisition system and the trial hit data acquisition method of the present invention have been described above in detail, the present invention is not limited to the above-described embodiments, and various improvements and changes can be made without departing from the spirit of the present invention. Of course it's good.

10 Trial Hit Data Acquisition System 14 Trial Hit Measuring Device 14a Golf Club Head Behavior Detection Unit 14b Golf Ball Behavior Detection Unit 15 Hit Detection Unit 16 Golf Club Head Imaging Device 18 Processing Device 18a Trial Hit Data Calculation Unit 18b Feature Point Acquisition Unit 18c Image Discrimination Unit 20 CPU
22 Memory 24 Golf Club 26 Golf Club Shaft 28 Golf Club Head 30 Display 32 Operation Unit

Claims (12)

A trial hit data acquisition system for obtaining trial hit data when a golf ball is hit by a golf club,
A trial hit measuring device for measuring at least one of behavior of a golf club head of a golf club and a behavior of the hit golf ball when trial hitting a golf ball,
At the time of trial hitting with the golf club, a feature point detection sensor that detects the occurrence of feature points during a golf swing,
A processing device for calculating trial hit data relating to the behavior from measurement by the trial hit measurement device,
An imaging device for imaging the golf club head before hitting the golf ball,
The processing device is
A test shot data calculation unit for calculating test shot data from measurement by the test shot measuring device,
A feature point acquisition unit that acquires the timing of detection of the feature point using a detection signal from the feature point detection sensor,
Of the images of the golf club head captured by the image capturing device, from the image in which the time difference between the detection timing of the feature point and the image capturing timing is within a predetermined range, An image determining unit that extracts first appearance feature information and determines the type of the golf club based on the first appearance feature information;
A recording unit that records and saves the trial hit data in association with the type of the determined golf club and the trial hit data.
A trial hit data acquisition system comprising: The imaging device images the golf club head together with the golf ball before hitting,
The first appearance feature information includes a size of the golf club head,
The image discriminating unit discriminates the types of golf clubs that can be discriminated by the size of the golf club head by comparing the size of the golf ball and the size of the golf club head in the image, The trial hit data acquisition system according to item 1. The first appearance feature information includes a shape of an image of the golf club head,
The trial hit data acquisition according to claim 1, wherein the image determination unit determines the type of the golf club that can be distinguished by the shape of the golf club head, based on the shape of the image of the golf club head in the image. system. The recording unit holds in advance reference images of a plurality of golf club heads having at least one second appearance feature information of a pattern, a symbol, and a color, which can be associated with the model name or model number of the golf club head. And
The image discriminating unit matches the image of the golf club head in the image captured by the image capturing device with the second appearance feature information of each of the reference images, so that the golf used for the trial hit Get the model name or model number of the club head,
The trial hit data acquisition system according to any one of claims 1 to 3, wherein the recording unit records and stores the model name or the model number and the trial hit data in association with each other in addition to the type of the golf club. ..   The second appearance feature information is formed on the face surface of the golf club head, a pattern of score lines provided on the face surface of the golf club head, an arrangement form of punch marks provided on the face surface, and the face surface. The trial hit data acquisition system according to claim 4, including at least one of the decorated pattern and the logo mark provided on the golf club head.   The test hit data calculation unit sets processing parameters for calculating the test hit data from the measurement result of the behavior of the golf club head of the golf club according to the determined type of the golf club. The trial hit data acquisition system according to any one of 1.   7. The trial shot measuring device according to claim 1, wherein the trial shot measuring device changes measurement conditions for measuring a behavior of the golf ball after being hit according to the type of the golf club that has been determined. Data acquisition system.   8. The analysis device for analyzing the behavior of the golf ball is provided for each type of the golf club by using the trial hit data associated with the type of the golf club. Trial hit data acquisition system described in. The imaging device images a moving image of the golf ball and the golf club head,
The image used to determine the type of the golf club is a plurality of images that continuously include the image of the golf club for a predetermined time,
The first appearance feature information includes an appearance feature amount,
The trial hit data acquisition according to claim 1, wherein the image determination unit determines the type of the golf club by using an average value or a median value of the appearance feature amounts in the plurality of images. system. A trial hit data acquisition system for obtaining trial hit data when a golf ball is hit by a golf club,
A test shot measurement including an image pickup device for picking up an image of a golf club head or a golf ball, and measuring at least one of the behavior of the golf club head of the golf club and the behavior of the hit golf ball when the golf ball is tried. A device,
At the time of trial hitting with the golf club, a feature point detection sensor that detects the occurrence of feature points during a golf swing,
A processing device for calculating trial hit data relating to the behavior from measurement by the trial hit measurement device;
The processing device is
A test shot data calculation unit for calculating test shot data from measurement by the test shot measuring device,
A feature point acquisition unit that acquires the timing of detection of the feature point using a detection signal from the feature point detection sensor,
Among the images of the golf club head before hitting the golf ball captured by the image capturing device, an image in which a time difference between the timing of detecting the characteristic point and the timing of capturing the image is within a predetermined range. From the first appearance feature information of the golf club head, and an image determination unit that determines the type of the golf club based on the first appearance feature information,
A recording unit that records and saves the test hit data in association with the type of the golf club that has been determined and the test hit data.
A trial hit data acquisition system comprising: A method for acquiring trial hit data for trial hitting a golf ball at a golf club, comprising:
A step of measuring at least one of the behavior of the golf club head of the golf club and the behavior of the hit golf ball when trial hitting the golf ball to obtain trial hit data;
Detecting the occurrence of feature points during a golf swing during a trial hit by the golf club,
Imaging the golf club head before hitting the golf ball;
From the image of the captured golf club head, the first appearance feature of the golf club head from an image in which the time difference between the detection timing of the feature point and the capture timing of the image is within a predetermined range. Extracting information, and determining the type of the golf club based on the first appearance feature information,
A method for acquiring trial hit data, comprising a step of recording the test hit data in association with the determined type of the golf club and the test hit data. A reference image of a plurality of golf club heads having at least one second appearance feature information among patterns, symbols, and colors, which can be associated with the model name or model number of the golf club, is stored in the memory in advance,
In the step of determining the type of the golf club, the image of the golf club head in the captured image is matched with the second appearance feature information of each of the reference images, so that the golf used in the trial hit Get information on the model name or model number of the club,
The trial hit data acquisition method according to claim 11, wherein the step of recording and saving includes the step of recording and saving the acquired model name or model number and the test hit data in association with each other.

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