JPH09206418A - Jumping distance measuring device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To automatically perform the judgement of valid/invalid trials and the measurement of a jumping distance in a jumping event. SOLUTION: A camera 2 picks up images near a takeoff plank 20 and an image processing part 4 obtains the image data of the takeoff state of a player from the images picked up by the camera 2. The camera 5 picks up the images of the landing point of the player and the image processing part 7 obtains the image data of the landing state of the player from the images picked up by the camera 5. A data processing part 8 judges whether or not the trial of the player is valid from the image data of the takeoff state and the landing state obtained in the image processing parts 4 and 7 and obtains the jumping distance from the image data of the landing state at the time of judging it as valid. Then, the data processing part 8 displays a judged result and the jumping distance at display devices 10 and 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a jumping distance measuring device provided in a jumping arena for measuring a jumping distance by determining whether or not a player's attempt is effective.

[0002]

2. Description of the Related Art Conventionally, in jumping competitions such as long jump or triple jump, a referee visually confirms whether or not a crossing line (the tip on the jumping direction side of the crossing plate) is crossed at the crossing plate. Also, the jumping distance was measured by a measuring instrument after the judge visually determined the landing point closest to the railroad crossing and made a marking such as sticking a measuring pin at that point. In addition, the number panel of the competitors and the operation of the display panel that displays the competition results, the recording of the competition results, and the determination of the ranking were also performed manually.

[0003]

As described above, in the conventional jumping competition, since all the visual confirmation and measurement are performed by the referee, there is a problem that a plurality of personnel are required. Further, there is a problem that it is difficult to determine the state of crossing because the state of the crossing of the athlete is visually confirmed. The present invention has been made to solve the above problems, and an object of the present invention is to provide a jumping distance measuring device capable of automatically determining a valid / invalid attempt and a jumping distance in a jumping competition. .

[0004]

The jumping distance measuring device of the present invention comprises first image pickup means for picking up an image of a railroad crossing plate, and image data of a competitor's crossing state based on the image picked up by the first image pickup means. The first image processing means for obtaining the image data, the second image capturing means for capturing the landing point of the athlete, and the second image data for the athlete's landing state from the image captured by the second image capturing means. An image processing means, a display means for displaying a competition result, and a crossing state obtained by the first and second image processing means,
It has a data processing means for determining whether or not the athlete's attempt is valid from the image data of the landing state, obtaining a jump distance from the image data when it is determined to be effective, and displaying the determination result and the jump distance on the display means. It is a thing. In this way, the data processing means automatically performs a series of processing such as determination of the valid / invalid attempt, measurement of the jump distance, and display of the competition result on the display means.

[0005]

1 is a block diagram of a jumping distance measuring apparatus showing a first embodiment of the present invention. Reference numeral 1 is a level crossing detection sensor that detects the moment of a player's level crossing, 2 is a camera that serves as a first imaging means for capturing an image of the level crossing plate 20, and 3 is a camera interface section that interfaces between the camera 2 and an image processing section in the subsequent stage. Reference numeral 4 denotes an image processing unit that serves as a first image processing unit that obtains image data of a player's level crossing from an image captured by the camera 2. Reference numeral 5 serves as a second imaging unit that captures the landing point of the competitor. A camera, 6 is a camera interface section that interfaces between the camera 5 and an image processing section in the subsequent stage, and 7 is an image that serves as a second image processing means for obtaining image data of the athlete's landing state from the image captured by the camera 5. It is a processing unit.

Reference numeral 8 determines whether or not the athlete's attempt is valid from the image data of the level crossing state and landing state obtained by the image processing units 4 and 7, and when it is determined to be valid, the jumping distance from the image data is determined. Required data processing unit, 9 is data processing unit 8
An input device for inputting data and commands to the device, 10 is a display device for transmitting the competition result to the spectators of the jumping competition, 11 is a display device for displaying the competition result to the umpire, 1
Reference numeral 2 is an output device for printing a list of competition results and rankings, 21 is a runway, and 22 is a sandbox.

Next, the operation of such a jump distance measuring device will be described. First, the referee who uses this jumping distance measuring device operates the input device 9 to previously input the bib numbers and the number of attempts of all the athletes. These input information are sent to the data processing unit 8 and stored therein. When the competition is started, the umpire operates the input device 9 to input the race bib number of the athlete who will jump.

When the bib number is input, the data processing section 8 displays the bib number information on the display devices 10 and 11.
And outputs the original image acquisition signal to the image processing unit 7.
Output to As a result, the bib numbers of the jumping athletes are displayed on the display devices 10 and 11. Further, when the original image capture signal is input, the image processing unit 7 uses an image from the camera 5 installed at a position described later as an image of the sandbox 22 before jumping (hereinafter, referred to as an original image). Capture in memory.

Next, the railroad crossing detection sensor 1 includes the railroad crossing plate 20.
And a pressure sensor disposed on the ground in the vicinity thereof, and detects the moment of the takeoff of the athlete who started the attempt and outputs a takeoff detection signal. The camera 2 is installed in front of the railroad crossing plate 20 so as not to get in the way of the jumping athlete, and images the vicinity of the railroad crossing plate 20 from diagonally above as shown in FIG.
The image signal from the camera 2 is constantly sent to the image processing unit 4 via the camera interface unit 3.

[0010] The athlete starts the attempt and the crossing detection sensor 1
When the crossing detection signal is input from the image processing unit 4, the image processing unit 4 captures the image captured by the camera 2 in a memory (not shown). As a result, the memory of the image processing unit 4 stores the image data at the moment of the player's takeoff. In the image captured at this time, one foot of the athlete is shown in the vicinity of the railroad crossing plate 20, so by binarizing this image, the contour of the foot at the moment of the railroad crossing can be extracted. Then, the image processing unit 4 outputs this binarized image data to the data processing unit 8.

The position of the railroad crossing plate 20 in the image captured by the camera 2 is registered in the data processing unit 8 in advance. The data processing unit 8 compares the position of the level crossing plate 20 with the position of the foot in the binarized image data, and determines that the foot of the competitor has the level crossing plate 2.
It is checked whether or not it is outside from the side of 0 and whether or not the crossing line (the tip on the jumping direction side of the crossing plate 20) is crossed. If it does not exceed, it is judged as an effective attempt,
If the foot crosses either side, it is judged as an invalid attempt (foul).

Next, the camera 5 is separated from the railroad crossing by a predetermined distance (eg, 8 m) in the jumping direction and at a position separated from the ground (here, the sandbox 22) by a predetermined height (eg, 4 m). It is installed vertically downward and is designed to capture an image of the player's landing point on the sandbox 22. At this time,
As shown in FIG. 3, the camera 5 is installed so that the horizontal direction of the image matches the jumping direction. Therefore, the jump distance becomes longer toward the right side of the image.

The image signal from the camera 5 is constantly sent to the image processing section 7 via the camera interface section 6. It should be noted that the focal length 3 from 4 m above the sandbox 22
If an image is picked up by a 2/3 inch image pickup device with a 5 mm lens, an area of about 1.9 m square can be put in the image pickup area, and it is possible to cope with the length of the jumping distance while the camera 5 is fixed.

Next, the data processing unit 8 is operated by the image processing unit 4
After a predetermined time has elapsed since the determination result of the level crossing state based on the image data from (1) is output, a jumping distance measurement start signal is output to the image processing unit 7. This predetermined time is set to be long enough for the athlete to jump and leave the sandbox 22. When the jumping distance measurement start signal is input, the image processing unit 7 captures the image captured by the camera 5 in a memory (not shown).
Thus, the memory of the image processing unit 7 stores the image data of the sandbox 22 after the athlete jumps and lands.

Next, the image processing section 7 finds the difference between the original image data stored previously and the image data just captured. As a result, it is possible to extract only the trace of the foot or body when the athlete lands, and by binarizing the result, the contour of the trace of landing can be extracted. Then, the image processing unit 7 outputs this binarized image data to the data processing unit 8.

Next, the effective range of the sandbox 22 is registered in the data processing section 8 in advance. The data processing unit 8 determines that the landing mark in the binarized image data is within the effective range and that the landing mark is within the effective range, and that the outside of the effective range is within the effective range. Subsequently, when the data processing unit 8 determines that it is an effective attempt, the data processing unit 8 obtains the jump distance from the binarized image data obtained by the image processing unit 7 as follows.

Since the camera 5 is installed so that the horizontal direction of the image coincides with the jumping direction, the minimum horizontal value of the landing mark in the image data is the position closest to the railroad crossing. In the jumping competition, the jumping distance D is a distance measured from the landing mark closest to the railroad crossing to the railroad crossing so as to be perpendicular to the railroad crossing and its extension. Then, a marker whose distance from the railroad crossing is known is provided in the sandbox 22 and the image is taken by the camera 5, so that in the data processing unit 8, the actual distance from the railroad crossing and the image processed by the data processing unit 8 are displayed. The relationship of the above positions is preset.

As a result, the data processing unit 8 causes the actual jump distance D from the position on the image of the landing mark closest to the railroad crossing line.
Can be requested. If the images handled by the image processing unit 7 and the data processing unit 8 are, for example, 512 × 512 pixels, and the image pickup area of the camera 5 is the above-described 1.9 m square, then 1
The length per pixel is about 3.7 mm. The jump distance is rounded down to a value equal to or less than cm, so there is no problem in measuring the jump distance.

Next, the data processing unit 8 is operated by the image processing unit 4
Based on the determination of the crossing state based on the image data from or the determination of the landing state based on the image data from the image processing unit 7,
If it is determined to be an invalid attempt, the display device 10 or 11 displays that the attempt is invalid. If all of these determination results are valid, the calculated jumping distance data is stored in association with the athlete's bib number, and the jumping distance is displayed on the display device 10, 11. In this way, the umpire and the spectator can confirm the results of the competitor's attempts.

The umpire can also display the images processed by the image processing units 4 and 7 on the display device 11 and confirm the validity / invalidity of the attempt. Next, when the trial of one person is completed in this way, the referee operates the input device 9 to input the race bib number of the athlete who will jump next. When the bib number is input, the data processing unit 8 erases the information of the previous athlete from the display devices 10 and 11, displays the new bib number on the display devices 10 and 11, and also outputs the original image capture signal. It is output to the image processing unit 7. Thus, the same operation as described above is repeated.

The data processing unit 8 determines the rank in the order of the longest distance among the stored jump distances after the attempts of all the athletes are completed (that is, all the athletes have completed the preset number of attempts). , Automatically select the best eight. And
The competitors remaining in the best 8 will also decide the final ranking after finishing the same attempt. These results are displayed on the display devices 10 and 11.
And is printed by the output device 12.

[0022]

According to the present invention, since the data processing means automatically performs a series of processing such as determination of valid / invalid attempt, measurement of jump distance, and display of competition results on the display means,
It is possible to manage the competition with a smaller number of people than before.
Further, the data processing means determines whether or not the attempt of the athlete is valid from the image data of the level crossing state and the landing state obtained by the first and second image processing means, so that a more reliable determination than before can be made. You can

[Brief description of drawings]

FIG. 1 is a block diagram of a jumping distance measuring device showing a first embodiment of the present invention.

FIG. 2 is a diagram showing an image captured by a camera 2.

FIG. 3 is a diagram showing an image captured by a camera 5.

[Explanation of symbols]

1 ... Railroad crossing detection sensor, 2, 5 ... Camera, 3, 6 ... Camera interface section, 4, 7 ... Image processing section, 8 ... Data processing section, 9 ... Input device, 10, 11 ... Display device, 12 ... Output device .

Claims (1)

[Claims] 1. A jumping distance measuring device, which is provided in a jumping stadium for measuring a jumping distance by determining whether or not a player's attempt is effective, which is a first device for taking an image of a level crossing. An image pickup means; a first image processing means for obtaining image data of a player's level crossing state from an image picked up by the first image pickup means; and a second image pickup means for picking up an athlete's landing point. The second image processing means for obtaining image data of the landing state of the athlete from the image captured by the second image capturing means, the display means for displaying the competition result, and the first and second image processing means. From the obtained image data of the crossing state and landing state, it is determined whether the athlete's attempt is valid, and when it is determined to be valid, the jumping distance is obtained from the image data, and the determination result and the jumping distance are displayed on the display means. And data processing means for A jumping distance measuring device.