JP2004194904A - Order-of-arrival and time determining device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an order-of-arrival and time determining device by which a flying start can be immediately judged. <P>SOLUTION: The order-of-arrival and time determining device is provided with an image processing memory part 26 which stores images of movable bodies 2 with a predetermined period of import and a CPU 14 which detects change in luminance of the stored images and judges the flying start of a movable body according to the information on the change in luminance. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a landing order and time determination device that determines a landing order and a time from a video signal stored using a line sensor camera.
[0002]
[Prior art]
A conventional arrival order and time determination device using a line sensor camera (for example, see Patent Document 1) is a line in which a moving object passing on a determination reference line such as a goal line exactly matches the determination reference line. An image is captured using a sensor camera, a one-dimensional video signal output from the line sensor camera is input to an image storage unit having a scan conversion function, and stored together with time information and the like required for arrival order determination. A one-dimensional video signal of a camera is scanned and converted into a two-dimensional video signal, read out from the image storage unit together with time information and the like required for arrival order determination, output to a video monitor, and an image required for the determination is displayed. is there.
[0003]
There are boat races, horse races, bicycle races, athletics, etc., which use the arrival order and time determination device.A moving object such as a boat, horse, bicycle, or runner passes over a judgment reference line such as a goal line, It is stored as a judgment image, read out and displayed.
[0004]
[Patent Document 1]
JP-A-2000-134612 (pages 2 to 3, FIG. 1)
[0005]
[Problems to be solved by the invention]
In each of the above-mentioned competitions, especially in a boat race, a start decision peculiar to the competition is an important decision factor of the race. That is, if there is a flying or the like at the start, the rider will be disqualified and the race will be greatly affected.
[0006]
Conventionally, a judge judges visually from the start image at the time of the start and specifies the competitor who has flown (flying-start), so that a slight delay has occurred in the judgment.
[0007]
SUMMARY OF THE INVENTION It is an object of the present invention to provide an arrival order and time determination device capable of immediately determining flying at the start.
[0008]
[Means for Solving the Problems]
An image processing memory for storing an image of the moving object at a predetermined capturing cycle in a arrival order and time determining device for judging the order and time of arrival of a moving object from a video signal stored using a line sensor camera. And a CPU for detecting a change in brightness of the stored image and determining that the moving body has flown based on the information on the change in brightness. .
[0009]
The present invention is the arrival order and time determination device described above, wherein the CPU determines that the moving body has flown when the luminance change is a predetermined capture period. It is a time determination device.
[0010]
According to the present invention, there is provided the arrival order and time determination device according to any one of the above, wherein the plurality of moving objects are provided, and each of the plurality of moving objects is displayed in a different color. It is.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
As an embodiment of the arrival order and time determination device of the present invention, a case where the device is used in a boat race will be described below with reference to FIGS.
[0012]
FIG. 1 is a block diagram showing one embodiment of the arrival order and time determination device of the present invention. In the arrival order and time determination device shown in FIG. 1, reference numeral 1 denotes a determination reference line such as a start / goal line, 2 denotes a boat which is a moving object passing on the determination reference line 1, 3 denotes a three-plate color line sensor camera, Denotes a lens, 5 denotes an image recording unit, 16 denotes a color video monitor, 17 denotes an image filing device, 18 denotes a video printer, 19 denotes a notice signal, 20 denotes a reference timer start signal, 21 denotes a memory take-in signal, and 22 denotes an operation unit. ing.
[0013]
The image recording unit 5 will be described in more detail. Reference numeral 6 denotes an A / D conversion circuit for converting an RGB video signal output from the three-plate color line sensor camera 3 into a digital signal, and reference numeral 7 denotes a digital RGB signal from the A / D conversion circuit 6. A writing circuit for storing a video signal in a memory section, a memory section for storing a digital RGB video signal and a digital information signal, and a reading circuit for scanning and reading the digital RGB video signal and the digital information signal stored in the memory section. Circuit, 10-1 is a D / A conversion circuit for converting a digital RGB video signal or digital information signal into an analog signal, 11 is a time generator, 12 is an address control section for controlling writing and reading of the memory section 8, and 13 is a character. A generator, 14 is a central processing unit (hereinafter referred to as a CPU), and 15 is an interface with an external signal. Is an interface unit that performs.
[0014]
Reference numeral 26 denotes an image processing memory. The writing circuit 7 branches and inputs the digital RGB video signal to the memory unit 8 and the image processing memory 26. 10-2 is a D / A converter for converting digital data output from the image processing memory 26 into an analog signal, and 31 is an external output terminal for connecting an external output terminal such as a monitor or an alarm.
[0015]
A three-color color line sensor camera 3 captures an image of a moving body 2 passing on a determination reference line 1 as a subject using a lens 4 to obtain a one-dimensional RGB video signal.
[0016]
The RGB video signals from the three-plate color line sensor camera 3 are output to an image recording unit 5, and the RGB video signals are converted into digital RGB video signals by an A / D conversion circuit 6, and are written via a writing circuit 7 to a memory unit. 8 and stored.
[0017]
The memory unit 8 stores digital RGB video data and, at the same time, digital information to be superimposed on an image. The digital information includes, for example, the time elapsed from the start output from the time generator 11, the characters and symbols such as the game names output from the character information generator 13, and the determination line.
[0018]
The readout circuit 9 scan-converts and reads out digital RGB video data and digital information data stored in the memory unit 8 as a two-dimensional video signal and a two-dimensional information signal, and reads out them by the D / A conversion circuit 10-1. The data is converted into analog RGB video data and analog information data and output to the color video monitor 16.
[0019]
The color video monitor 16 displays an image necessary for determining the arrival order and time from the two-dimensional video signal and the information signal input from the D / A conversion circuit 10-1. Further, the image can be recorded and stored in the image filing device 17 as needed, and the image can be printed on the video printer 18.
[0020]
The writing circuit 7, the memory section 8, the reading circuit 9, and the like are controlled by a control signal of the address control section 12 for writing and reading. In addition, various controls by selecting means for recording and reading out signals such as video signals and information signals from the operating device 22 and a notice signal 19 as an externally supplied signal, a reference timer start signal 20, a memory take-in signal 21 and the like are provided. , And is controlled by the CPU 14 including the control of the entire apparatus via the interface unit 15.
[0021]
In the case of a boat race, it is important to judge the order of arrival at the start, as well as the judgment of flying and delay at the start. turn into.
[0022]
In the case of a boat race, this starting judgment function is required, so a certain period of delay from the advance notice signal 19 input at a specific time several seconds to several tens of seconds before the reference timer start signal (0 second) 20 from the outside is required. The reference timer start signal (0 second) 20 Writing to the memory unit 8 is started several seconds before (t1), and digital RGB video data and digital information data are stored for each line.
[0023]
FIG. 2 is a diagram showing a start image 23 stored in the memory unit 8 of FIG. In FIG. 2, the time t1 is about 0. 0 of the reference timer start signal (0 second) 20. Shows a few seconds ago. When the reference timer start signal 20 is input, 0 second (t2) of the reference determination time is stored and a 0 second start line 24 is stored for the determination.
[0024]
When the reference timer start signal 20 is input again one second later (t3), one second of the reference determination time is stored and a one-second line 25 is stored for the determination. Then about 0. It is stored until several seconds (t4).
[0025]
Between the times t1 and t4, a plurality of boats, which are moving bodies, that is, six boats 22 to 27 pass in the figure. Digital RGB video data representing the six boats 22 to 27 is also stored. .
[0026]
Thereafter, when the memory capture signal 21 is input, the video data at the time of the goal is stored continuously after the start image 24.
[0027]
In the present embodiment, in addition to the above-described basic operation, a digital RGB video signal input from the writing circuit 7 to the memory unit 8 is branched out and taken out each time it is input, and input to the image processing memory unit 26. The input digital RGB video signal is subjected to image processing by the CPU 14 to perform flying determination and target object identification.
[0028]
In the embodiment of FIG. 1, as described above, the image processing memory 26 performs the flying judgment and the specification of the target object from the input digital RGB video signal. In a boat race, the boat number is determined by the color of the boat, and the boat can be identified by recognizing the color. Therefore, it is possible to determine the flying by the following method. However, in this case, the boat must have a color scheme that allows the color to be clearly determined.
[0029]
In the embodiment of FIG. 2, as described above, six boats 22 to 27 pass, but the colors of the boats are, for example, blue for boat 22, yellow for boat 23, red for boat 24, and red for boat 25. Black, boat 26 is white, and boat 27 is green.
[0030]
FIG. 3 is a diagram illustrating a flying determination method in the image processing memory unit 26 of FIG.
[0031]
First, as shown in (a), after the start of data writing, the image capturing cycle of the color line sensor camera 3 is set to 0.1. A digital RGB video signal 27 of one line each of RGB input every several msec to several msec (for example, 0.5 msec or 3 msec) is stored in the image processing memory unit 26, and the video data is calculated by the CPU 14. A change in the luminance data is detected for each capture cycle.
[0032]
Next, as shown in (b), when a change in the brightness data of the video data is detected, the changed portion is assumed to be a detection target, and the changed portions 28a, 28a, The color is determined from 28b and 28c. In the illustration, the color is determined to be yellow.
[0033]
Next, as shown in (c), the boat is determined to be a target boat from several to several tens of continuous lines and has a certain width, color, and the like, and the boat is specified based on the color. In the illustration, it is a boat 23. If the position (capture cycle) at which the boat was first detected is before the reference timer start signal (0 seconds) is input, it is determined that the boat is a flying boat, and flying boat data 29 indicating that the boat is a flying boat is generated. And memorize.
[0034]
The flying boat data 29 stored in the image processing memory unit 8 is supplied to the readout circuit 9 and the external output terminal 31 in FIG.
[0035]
The reading circuit 9 reads the start image 23 of FIG. 2 stored in the memory unit 8 and the flying boat data 29 shown in FIG. 3C stored in the image processing memory unit 26, and reads the start image of FIG. The flying boat data 29 is superimposed on the data 23 and output to the color video monitor 16. In the drawing, the flying boat data 29 indicates the color of the flying boat, the characters “flying”, and the flying time.
[0036]
FIG. 4 is a diagram showing a flying determination result image 30 on the color video monitor 16 of FIG. The flying boat data 29 of FIG. 3C is displayed on the start image 23 of FIG.
[0037]
In FIG. 1, an analog signal is converted into an analog signal by the A / D conversion circuit 10-2, and the flying boat data 29 is taken out to the outside through the external output terminal 31.
[0038]
As described above, it is possible to immediately determine the flying when passing the start line.
[0039]
In a boat race, there is also a determination of a delay at the start, and if the vehicle passes the start line one second after the reference timer start signal by the same method, it can be automatically determined to be a delay.
[0040]
Here, in the case of a boat race, the normal water surface looks black. In addition, the water surface appears white due to reflection of waves and the like, and the possibility of erroneous detection occurs. In this case, when the RGB video signals make the same change, it can be avoided by determining that the white video is a white wave. For this reason, it is more practical to make the boat a color scheme avoiding white and black.
[0041]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to this invention, the arrival order and time determination apparatus which can immediately judge the flying at the time of a start can be obtained.
[Brief description of the drawings]
FIG. 1 is a block diagram illustrating an embodiment of a arrival order and time determination device according to the present invention.
FIG. 2 is a diagram illustrating a start image stored in a memory unit of FIG. 1;
FIG. 3 is a diagram illustrating a flying determination method in the image processing memory unit of FIG. 1;
FIG. 4 is a diagram showing a flying determination result image on the color video monitor of FIG. 1;
[Explanation of symbols]
1: judgment reference line, 2: moving object, 3: color line sensor camera, 4: lens, 5: image recording unit, 6: A / D converter, 7: writing circuit, 8: memory unit, 9: reading circuit Reference numerals 10-1, 10-2: D / A conversion circuit, 11: time generator, 12: address control unit, 13: character generator, 14: central processing unit: 15: interface circuit, 16: color video monitor , 17: image filing device, 18: video printer, 19: notice signal, 20: reference timer start signal, 21: memory fetch signal, 22: operating device, 23: start image, 241 second start line, 25: 1 second Line, 26: image processing memory unit, 27: one line RGB digital video signal, 28: RGB video signal luminance distribution, 29: flying boat data, 30: flying judgment Fruit images 31: external output terminal.

Claims (3)

A landing order and time determination device that determines a landing order and a time of a moving object from a video signal stored using a line sensor camera; And a CPU for detecting a change in brightness of the stored image and determining that the moving body has flown based on the information on the change in brightness. 2. The arrival order and time determination device according to claim 1, wherein the CPU determines that the moving body has flown when the luminance change is a predetermined capture period. apparatus. 3. The arrival order and time determination device according to claim 1 or 2, wherein the plurality of moving bodies are displayed, and each of the plurality of moving bodies is displayed in a different color. Judgment device.

Images