JP3469740B2 - Motion start timing measurement device and flying presence / absence determination device - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention is a motion start timing measurement apparatus, and athletics, about the flying presence judgment apparatus in swimming competitions and the like.

[0002]

2. Description of the Related Art Information on the motion of a subject such as a motion vector detected from the output of a video camera has not yet been used in the determination of presence / absence of flying, automatic detection of a signal-ignoring vehicle in an athletics competition, a swimming competition, etc. Not developed.

[0003]

SUMMARY OF THE INVENTION The present invention is a motion start timing for automatically measuring the timing at which an object starts to move, based on information about the motion of the object such as a motion vector detected from the output of a video camera. An object is to provide a measuring device.

It is an object of the present invention to provide a flying presence / absence determining device capable of automatically determining the presence / absence of flying.

[0005]

[0006]

A first motion start timing measuring device according to the present invention comprises means for detecting information on the motion of an object based on the output of the monitoring means, and information on the motion of the object. It is characterized by comprising means for calculating information regarding the timing at which the object starts to move.

In the second motion start timing measuring apparatus according to the present invention, the subject starts the movement based on the output of the video camera, the means for detecting the information about the movement of the subject, and the information about the movement of the subject. It is characterized in that it comprises means for calculating information regarding timing.

A third motion start timing measuring device according to the present invention comprises means for detecting information on the motion of the subject based on the output of the video camera, generating means for generating a predetermined reference timing signal, and information on the motion of the subject. And a means for calculating information about the timing at which the subject starts moving, and a means for measuring the difference between the timing at which the subject starts moving and the timing at which the reference timing signal occurs. To do.

As the information on the movement of the subject, for example, the motion vector for each of the plurality of detection areas set in the image pickup area of the video camera is used.
The brightness change may be used as the information regarding the movement of the subject.

The flying presence / absence determining apparatus according to the present invention comprises a motion detecting means for detecting information on the movement of the athlete before and after the start based on the output of the video camera, a generating means for generating a reference timing signal at the start, and the athlete. Based on the information about the movement of, the calculation means for calculating the information about the timing when the athlete starts the movement, the measuring means for measuring the difference between the timing when the athlete starts the movement and the timing when the reference timing signal is generated, And a determination means for determining the presence or absence of flying based on the measurement result by the measurement means.

[0011]

[0012]

DETAILED DESCRIPTION OF THE INVENTION

Embodiments of the present invention will be described below with reference to the drawings.

[1] Description of an embodiment in which the present invention is applied to a flying presence / absence determining device

FIG. 1 shows the configuration of a flying presence / absence determining device for determining the presence / absence of flying in athletics.

The flying presence / absence determining device includes a video camera 1, a start device 2, a determining circuit 3, and a flying notification device 4.

The video camera 1 is attached at a position where all the players lined up on the start line can be imaged. The start device 2 includes a measurement start signal generation button 21
And a trigger 22 are provided. When the measurement start signal generation button 21 is pressed by the starter, the measurement start signal S1 is output from the start device 2. Also, trigger 22
When the starter is pulled by the starter,
Generated by the start signal S2
The (reference timing signal) is output from the start device 2.

The determination circuit 3 includes a motion detection circuit 31, a sub-frame interpolation circuit 32, a first timer 33 and a second timer 3.
4, a subtraction circuit 35, an arithmetic circuit 36, a display 37, and a comparison circuit 38.

The output of the video camera 1 is the motion detection circuit 3
Sent to 1. The measurement start signal S1 is supplied to the motion detection circuit 3
1, sent to the first timer 33 and the second timer 34.
The start signal S2 is sent to the second timer 34.

The measurement start signal generation button 21 is pressed by the starter after all the athletes have changed to the start preparation posture by the command "Yoi" by the starter. When the measurement start signal S1 is input to the motion detection circuit 31, the motion detection circuit 31 starts its operation. When the measurement start signal S1 is input to the first timer 33 and the second timer 34, the first timer 33 and the second timer 34 start the time counting operation.

The motion detection circuit 31 calculates a motion vector for each frame, and outputs a motion detection signal S3 at the time when the motion first occurs based on the calculated motion vector. This motion detection signal S3 is sent to the first timer 33. Further, the motion vector at this time is sent to the sub-frame interpolation circuit 32.

The motion detection circuit 31 is based on, for example, the representative point matching method, as shown in FIG. 2, a motion vector for each of a plurality of detection regions E set in the image area 100 of the video camera 1 (related to motion). Information) is measured for each frame. Then, in the case where the motion vector measured for each detection region includes a motion vector having a size equal to or larger than a predetermined value, the motion detection signal S3 indicates the first timer 3
3 is sent to the sub-frame interpolation circuit 32 as well as the largest motion vector of the motion vectors measured for each detection area.

The representative point matching method will be described more specifically. Each detection area E is further divided into a plurality of small areas e as shown in FIG. Then, as shown in FIG. 4, a plurality of sampling points S are provided in each small area e.
And one representative point R are set.

The difference (correlation value at each sampling point) between the video signal level of each sampling point S in the small area e in the current frame and the video signal level of the representative point R in the corresponding small area e in the previous frame is , Each detection area E
Required for each. Then, for each detection region E, the correlation values of the sampling points S having the same deviation with respect to the representative point R are cumulatively added among all the small regions e in the detection region E. Therefore, the correlation cumulative value according to the number of sampling points S in one small area e is obtained for each detection area E.

Within each detection area E, the deviation of the point having the smallest correlation cumulative value, that is, the point having the highest correlation, is extracted as the motion vector (movement of the object) of the detection area E.

Motion detection signal S3 from the motion detection circuit 31
Is input to the first timer 33, the timer value T1 of the first timer 33 at that time is sent to the subtraction circuit 35.

When the trigger 22 is pulled by the starter and the start signal S2 is input to the second timer 34, the timer value T2 of the second timer 34 at that time is sent to the subtraction circuit 35.

When the timer values T1 and T2 are sent from both timers 33 and 34, the subtraction circuit 35 receives ΔT = T1-T.
Subtract two.

FIG. 5 shows a time chart when the time point t1 at which the motion detection signal S3 is output is after the time point t2 at which the start signal S2 is output. In this case, T1> T2 (ΔT> 0). In FIG. 5, time point t0 indicates the time point when the measurement start signal S1 is output.

FIG. 6 shows the time t when the motion detection signal is output.
1 shows a time chart when the start signal S2 is output before the time point t2. That is, the case where there is flying is shown. In this case, T1
<T2 (ΔT <0).

By the way, since the normal number of frames per second of the video camera 1 is 30 frames, the motion detection circuit 31 cannot measure the presence or absence of motion at a time interval shorter than 1/30 second. Therefore, the motion detection circuit 3
The motion start time detected by 1 is corrected by the sub-frame interpolation circuit 32 and the arithmetic circuit 36.

The operation of the subframe interpolation circuit 32 will be described. As shown in FIG. 7, assuming that the motion of the subject (competitor) is detected in the nth frame, the subject is actually at a predetermined time point between the (n-1) th frame and the nth frame. It is considered that the movement has started. At the start, the amount of movement M that the athlete can move in 1/30 seconds
Is obtained in advance through experiments or the like. Then, based on the magnitude V of the motion vector detected in the nth frame and the movement amount M for 1/30 seconds that is obtained in advance, the correction amount TA is calculated by the following equation 1.

[0033]

[Equation 1]

Since it can be determined that the motion has started at a time TA earlier than the time t1 at which the motion detection signal S3 is output, the arithmetic circuit 36 calculates the following mathematical expression 2
As shown in, the ΔT calculated by the subtraction circuit 35 is corrected using the correction amount TA to obtain the final time difference ΔT.

[0035]

[Equation 2]

The time difference ΔT obtained by the arithmetic circuit 36 is displayed on the display 37 and sent to the comparison circuit 38. The comparison circuit 38 determines the presence or absence of flying by comparing the time difference ΔT obtained by the arithmetic circuit 36 with a reference value TS given in advance. When ΔT is larger than TS, it is determined that there is no flying, and when ΔT is TS or less, it is determined that there is flying.

That is, when the athlete's movement is started after the time TS has passed from the time when the start signal S2 was output, it is determined that there is no flying, and the time TS is output from the time when the start signal S2 is output. It is determined that there was flying when the competitor's movement was started before the time of. Comparison circuit 38
Sends a drive signal to the flying notification device 4 when it is determined that there is flying. Therefore, the flying alarm device 4 causes a gun to be generated.

In the above embodiment, the motion detecting circuit 31
Detects the first motion after the measurement start signal S1 is input and outputs the motion detection signal S3. However, the stationary state immediately before the start is detected by the motion vector, and the first motion after the stationary state is detected. Motion detection signal S
3 may be output.

In the above embodiment, the first timer 33 and the second timer 34 start the timer operation each time the measurement start signal S1 is input to the first timer 33 and the second timer 34. Regardless of the measurement start signal S1, the first timer 33 and the second timer 34 may be made to constantly and repeatedly count values from 0 to a predetermined value in the same phase and the same period.

According to the flying presence / absence determining device as described above, the presence / absence of flying can be determined, and the timing at which the start signal S2 is generated and the motion detection signal S3.
It is possible to measure the difference from the timing when is output.

Such a flying presence / absence determining device can be used as a start training device for athletics and the like.

[2] Description of a form of a reference example when the related art of the present invention is applied to an automatic detection device for a signal-ignoring vehicle

FIG. 8 shows the construction of an automatic detection system for a vehicle with no signal.

The automatic signal-ignoring vehicle detection device includes a video camera 101, a determination circuit 102, a notification device 103, and a camera 104 for photographing a violating vehicle. Judgment circuit 10
A signal switching signal (reference timing signal) is input to the signal 2 from the signal light control device 200 that controls the signal light.

As shown in FIG. 9, the video camera 101 is mounted so as to image a region P slightly ahead of the stop line L from a direction orthogonal to the traveling direction of the vehicle 201. In FIG. 9, 202 is a signal lamp. As shown in FIG. 9, the illegal vehicle photographing camera 104 is provided at a position where the vehicle in the area P can be imaged from the front. The notification device 103 notifies the cracker that the signal has been violated, and a lamp, a buzzer, or the like is used.

The determination circuit 102 includes a motion detection circuit 121,
First timer 122, second timer 123, subtraction circuit 124
And a comparison circuit 125. First timer 122
And the second timer 123 constantly repeats counting values from 0 to a predetermined value in the same phase and the same cycle. Motion detection circuit 121 and first timer 122
Then, a signal switching signal is sent from the signal light control device 200. The motion detection circuit 121 detects the motion of the subject based on the motion vector and outputs a motion detection signal, like the motion detection circuit 31 of FIG.

As shown in FIG. 10, the signal light switching signal of the control device 200 of the signal light 202 is "blue" or "yellow".
If, then the motion detection circuit 121 does not output a motion detection signal even if a motion is detected. Signal light control device 200
The motion detection circuit 121 outputs a motion detection signal to the first timer 122 when the motion is detected for the first time every time the signal switching signal of is red. When the motion detection signal is input to the first timer 122, the current timer value T1 of the first timer 122 is sent to the subtraction circuit 124. The second timer 12 is set every time t _YR when the signal switching signal of the control device 200 of the signal lamp 202 changes from “yellow” to “red”.
The current timer value T2 of 3 is sent to the subtraction circuit 124.

When the timer value T1 is sent from the first timer 122, the subtraction circuit 124 receives T1-T2 (= ΔT).
Is subtracted. This calculation result ΔT is sent to the comparison circuit 125.

The comparison circuit 125 compares ΔT with a preset value TS, and when ΔT is larger than TS, determines that signal neglect has occurred and sends a drive signal to the notification device 103 and the camera 104. . As a result, the notification device 103 is driven to notify the cracker that the signal has been ignored. Further, the violating vehicle entering the area P is imaged from the front by the camera 104.

If there is no policeman, the plate number of the violating vehicle may be extracted based on the image captured by the camera 104 and stored together with the captured image.

[0051]

According to the present invention, it is possible to obtain a motion start timing measuring device capable of automatically measuring the timing at which an object starts to move. Further, according to the present invention, the flying presence determining device capable of determining the presence or absence of flying automatically is Ru obtained.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a flying presence / absence determining device.

FIG. 2 is a schematic diagram showing a plurality of detection areas set in an imaging area of a video camera.

FIG. 3 is a schematic diagram showing a plurality of small areas in the detection area shown in FIG.

FIG. 4 is a schematic diagram showing a plurality of sampling points and one representative point set in the small area shown in FIG.

FIG. 5 is a time chart when the time point t1 when the motion detection signal is output is after the time point t2 when the start signal S2 is output.

FIG. 6 is a time chart when the time point t1 at which the motion detection signal is output is before the time point t2 at which the start signal S2 is output.

FIG. 7 is an explanatory diagram for explaining the operation of the sub-frame interpolation circuit.

FIG. 8 is a block diagram showing a configuration of an automatic detection device for a signal-ignoring vehicle.

FIG. 9 is a plan view showing an image pickup area of a video camera.

FIG. 10 is a time chart showing a signal light switching signal and a motion detection signal.

[Explanation of symbols]

1, 101 video camera 2 Start device 3,102 Judgment circuit 4 Flying notification device 31 Motion Detection Circuit 32 sub-frame interpolation circuit 33, 34, 122, 123 timer 35,124 Subtractor 36 arithmetic circuit 38, 125 comparison circuit

Continuation of front page (56) Reference JP-A-8-265633 (JP, A) JP-A-6-257994 (JP, A) JP-A-60-188192 (JP, A) JP-A-52-146198 (JP , A) JP-A-52-106943 (JP, A) Jikhohei 6-41570 (JP, Y2) (58) Fields investigated (Int.Cl. ⁷ , DB name) A63B 71/06 G08G 1/00- 9/00 A63K 3/02 H04N 7/18

Claims (3)

(57) [Claims] 1. A subject based on the output of a video camera
Means for detecting frame-by-frame information regarding the movement of the subject, generation means for generating a predetermined reference timing signal, and movement of the subject based on the information regarding the movement of the subject.
Means for outputting a motion detection signal when a motion occurs, a time when the motion detection signal is output, and the reference timing
Means for obtaining a time difference ΔT from the time when the ringing signal is generated,
And the timing when the subject starts moving and the reference timing
The difference from the timing at which the signal is generated is the movement of the subject.
Information about one frame of output from the video camera
Calculated based on the amount of movement obtained in
By correcting the time difference ΔT using the correction amount
A movement start timing measuring device comprising means for obtaining . 2. Information relating to the movement of a subject is recorded in a video camera.
Multiple detection areas set in the image area of the camera
The motion start timing measuring device according to claim 1, wherein the motion start timing measuring device is a motion vector corresponding to this . 3. A star based on the output of a video camera.
Detects information about the movement of the athlete before and after each frame
Motion detection means, generating a reference timing signal at start
Based on the information about the means and the movement of the athlete, the movement of the athlete
Means for outputting a motion detection signal at the time of occurrence, a time at which the motion detection signal is output, and the reference timing
Means for obtaining the time difference ΔT from the time when the ringing signal is generated, the timing when the athlete starts the movement, and the reference timing
The difference with the timing when the signal is generated is the movement of the athlete.
Information about one frame of output from the video camera
Calculated based on the amount of movement obtained in
By correcting the time difference ΔT using the correction amount
Based on the measurement means to be measured and the measurement result by the measurement means,
A flying presence / absence determining device , comprising: determination means for determining presence / absence .