JP2002224260A - Offside decision assisting system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To assist an exact and rapid offside decision by rapidly presenting the video on an offside line when the offside decision is carried out. SOLUTION: A driver 12 is controlled by a controller 13, by which the position of an imaging device 11 is controlled and the video on the offside line is picked up. On the other hand, the time when the offside decision is carried out is instructed by an image acquisition instruction input device 4 and the video on the offside line picked up by the imaging device 11 at this time is sent as an image from an image transmitter 21. The image on the offside line received by an image receiver 31 is displayed by an image display device 32.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an offside judgment assisting device, and more particularly to an offside judgment assisting device for assisting an offside judgment in ball games such as soccer, rugby, and American football.

[0002]

2. Description of the Related Art In a soccer game, for example, conventionally, an attacking player holding a ball receives a ball at a time when the referee judges that the player has passed a teammate in the direction of the opponent's goal. The assistant referee determines whether the offending player is ahead of the offside line,
Offside judgment is performed. The offside line is an imaginary line drawn in parallel with the goal line passing through the position of the second player from the rear end on the defensive side including the keeper.

"Reproduction of a soccer scene by computer animation" (Tanaka, Matsui, Hirano, Yoshioka, Onishi, 2000, IEEJ Transactions C, 120-C, vol. 1)
(Pages 88 to 97), the position and angle of view of the camera are calibrated using the intersection of the white line of the field, the intersection of the goal post and the goal bar as reference points, and the player on the field from the camera image. And the scene can be reproduced from an arbitrary viewpoint. Using this, the scene of the offside line viewed from the side or from the top is virtually reproduced from the image of the TV camera etc. showing the scene to be judged offside, and it is judged whether the player receiving the pass is at the offside position There are ways to do that.

[0004]

The first problem is that the offside determination cannot be performed with high accuracy. The reason is that it is the referee who determines that the player holding the ball has made a pass to an ally in the direction of the opponent's goal, and at that time whether the player receiving the ball has crossed the offside line. Is the assistant referee,
This is because it is difficult for the referee and assistant referee to synchronize the time at which the offside judgment should be made.

A second problem is that the assistant referee cannot always determine the position of the offside line accurately from the side. The reason is that the assistant referee not only pays attention to the offside line, but also determines that the ball has left the sideline, and therefore cannot always pay attention to the offside line.

A third problem is that in the method of performing the offside determination using the image of the television camera, it takes a long time to reproduce the player position on the offside line, so that the determination takes a long time and the flow of the game is stopped. That's what it means. Further, when the players overlap with each other in the video, accurate estimation of the position of the player cannot be performed, and the offside determination cannot be performed.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an off-side determination assisting device for quickly presenting an image on an off-side line at a time when an off-side determination is made to a user who makes an off-side determination.

[0008] As other prior art documents, re-published patent WO96 / 34364 and JP-A-10-290 are disclosed.
886, but both are related to computer games and the like, and are not technologies used in actual soccer games and the like. Also, there is JP-A-6-254185, which relates to a soccer game machine capable of practicing a goal shot or the like alone, and is not a technique used in an actual soccer game or the like.

[0009]

An offside determination assisting apparatus according to the present invention includes an offside line imaging apparatus for acquiring an image on an offside line, and an image acquisition instruction for instructing a time of an image to be displayed on an image providing apparatus described later. An input device;
An instruction image transmitting apparatus that transmits an image on an offside line at a designated time in a video acquired by the offside line imaging apparatus, and an image providing apparatus that receives and displays an image transmitted from the instruction image transmitting apparatus. It is characterized by having.

The offside determination assisting device according to the present invention is further characterized in that the offside line imaging device includes an imaging device for capturing an image, a driving device for moving the imaging device in a direction and at a speed instructed, and an offside line. A control device for controlling the driving device so as to capture an image with the imaging device.

Further, in the offside determination assisting device according to the present invention, the control device is a direction indicating device provided with a joystick, and the user manually operates the device.

Still further, the offside determination assisting device of the present invention is an input determination device for generating an image transmission request signal when the instruction image transmitting device detects an image acquisition instruction signal from the image acquisition instruction input device. And an image transmission device for transmitting a video acquired from the imaging device as an image when receiving an image transmission request signal from the input determination device.

Further, in the offside determination assisting device according to the present invention, the image providing device displays an image receiving device for receiving an image transmitted from the instruction image transmitting device, and an image supplied from the image receiving device. And an image display device.

Further, in the offside determination assisting device according to the present invention, the image acquisition instruction input device comprises a push button for instructing a time to acquire an image.

Still further, in the offside determination assisting device according to the present invention, the instruction image transmitting device includes a video storage device for storing a captured video, and the transmitted and received images are a plurality of still images or moving images. And

Further, the offside determination assisting device according to the present invention is characterized in that in the image providing device, an image to be displayed can be selected from a plurality of still images or moving images according to a user's instruction.

Further, in the offside determination assisting device according to the present invention, the image pickup device is moved in parallel with a side line by the driving device.

The offside determination assisting device according to the present invention further includes an image analysis device, wherein the offside line imaging device estimates a position of the offside line by detecting a position of a ball or a player from a captured image, The position of the imaging device is automatically controlled so that an offside line position is imaged by the imaging device.

Further, in the offside determination assisting device according to the present invention, in the case of soccer, the image analysis device determines that the last player position of the defending team excluding the goalkeeper is the offside line position.

Further, the offside determination assisting device according to the present invention is characterized in that the image analysis device renders and presents the estimated offside line on a captured image.

Further, the offside determination assisting device of the present invention is characterized in that the image analysis device renders and presents a mark of the player at the detected offside position on a captured image.

Further, the offside determination assisting device according to the present invention is characterized in that the instruction image transmitting device and the image providing device transmit and receive images wirelessly.

Further, in the offside determination assisting device according to the present invention, the image providing device is a portable terminal in which the image providing device and the image acquisition instruction input device are integrated.

Further, in the offside determination assisting device according to the present invention, a pair of the offside line image pickup devices is installed on a rail laid on both side lines of the field, and each of the offside line image pickup devices is mounted on the field. The tracking of the offside line on each side is performed.

Further, the offside determination assisting device according to the present invention is arranged such that the pair of offside line imaging devices are located on the side line opposite to the assistant referee in charge of the same side so as not to obstruct the moving range of the assistant referee. It is characterized by that.

Further, the offside determination assisting device according to the present invention is characterized in that the offside line image pickup device is installed at an angle of view overlooking the field by increasing the installation height.

Furthermore, the offside determination assisting device of the present invention is characterized in that the offside line imaging device is installed in a form where rails are installed at a height of a field and suspended.

An offside determination assisting device according to the present invention includes an offside line imaging device, an instruction image transmitting device, an image providing device, and an image acquisition instruction input device. It operates so as to acquire an image of the player, transmits an image at a time designated by the image acquisition command input device from the designated image transmitting device, receives the image at the image providing device, and displays the image.

By adopting such a configuration, the user can instantly acquire and confirm the image on the offside line at the time to be subjected to the offside determination.
Quick and accurate offside determination can be assisted.

[0030]

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

Here, a soccer game in which the offside line position varies depending on the position of the player will be described as an example. The same applies to sports where the offside line is fixed by rules, such as ice hockey and lacrosse.

(1) First Embodiment FIG. 1 is a block diagram showing a configuration of an offside determination assisting device according to a first embodiment of the present invention. The offside determination assisting device according to the present embodiment is an offside line imaging device 1 for photographing a player on the offside line.
And an instruction image transmitting device 2 for transmitting an image at a time when an image acquisition instruction signal is received, an image providing device 3 for displaying a received image, and an image acquisition instruction input device 4 for instructing a time to acquire an image. Be composed.

The off-side line imaging device 1 includes an imaging device 11, a driving device 12, and a control device 13.

The image pickup device 11 is a device for picking up an image, such as a video camera, and supplies the picked-up image to the image transmitting device 21.

The driving device 12 has a driving function such as wheels for moving the imaging device 11, and moves in a direction and at a speed instructed by the control device 13 along a rail or the like installed in parallel with the side line. I do.

The control device 13 is a device for controlling the drive device 12 so that the image pickup device 11 takes an image of the position (offside line) of the second player from the rear of the defense including the keeper. Note that the control device 13 itself can be installed in a fixed place away from the imaging device 11 and the driving device 12.

The instruction image transmitting device 2 includes an image transmitting device 21
And an input determination device 22.

When receiving the image acquisition instruction signal from the input determining device 22, the image transmitting device 21 transmits the image acquired from the imaging device 11 at this time as an image by radio or the like.

The input judging device 22 judges whether there is an image acquisition instruction signal from the image acquisition instruction input device 4, and generates an image transmission request signal to the image transmission device 21 when detecting the signal.

The image providing device 3 includes an image receiving device 31 and
And an image display device 32.

The image receiving device 31 is a device for receiving the image transmitted from the image transmitting device 21.

The image display device 32 is a device such as a liquid crystal monitor for displaying an image supplied from the image receiving device 31.

The image acquisition instruction input device 4 is a device such as a push button for instructing a time to acquire an image.

Next, the operation of the off-side determination assisting device according to the first embodiment thus configured will be described with reference to FIGS.

As shown in FIG. 2, the off-side line image pickup devices 1A and 1
B, respectively, and the imaging devices 11A and 11B track off-side lines on side A and side B of the field, respectively. The off-side line imaging devices 1A and 1B may be arranged on the side line opposite to the assistant referee in charge of the same side so as not to obstruct the moving range of assistant assistants A and B. Imaging devices 11A and 11B
To prevent the line of sight from being obstructed even when the assistant referee crosses in front, and to prevent blind spots due to players overlapping each other,
It is preferable that the height of the installation is set to 2 m or more so that the angle of view can be viewed from above.

The imaging devices 11A and 11B may be installed along rails at high places in the field as shown in FIG. Hereinafter, the case where the imaging devices 11A and 11B are installed along the side line will be described, but the imaging device 11 suspended from a high place is described.
The same can be realized by using the images of A and 11B. Hereinafter, the side A and the side B will be described without particular division.

The driving device 12 is moved along the rail by using the control device 13 so that the imaging device 11 mounted on the offside line imaging device 1 can always photograph the player on the off-ride line. The control device 13 is a direction indicating device provided with a joystick and the like, and is manually operated by a user. In a direction indicating device using a joystick, a moving direction can be indicated by a direction in which the stick is tilted. In addition to this, it is desirable that the speed of movement can be adjusted by the angle at which the stick is tilted.

Thus, the video of the player on the offside line as shown in FIG. 4 is always supplied to the instruction image transmitting device 2. As the imaging device 11, NTSC (Nati
onal Television System Co
If a video camera or the like that outputs a video signal of the standard (mmite) standard is used, the screen has an aspect ratio of 3: 4. Although it is necessary to use the video camera, as shown in FIG. 5, by arranging the video camera rotated by 90 degrees about the line of sight, the entire offside line can be seen in a more zoomed-up state. In addition, in the video captured by the NTSC standard, a shift occurs between an odd field and an even field due to the influence of interlace, and in the case of a target object having a large motion, the influence is remarkably manifested as blur. Therefore, an image size (720 × 240 pixels) of only one field is used. For the problems of the NTSC standard and the interlace method, refer to “Practical Image Processing” (FE
ST Project Editing Committee, Springer
Fairlark Tokyo Co., Ltd., 2000).

The instruction image transmitting device 2 determines whether or not an image acquisition instruction signal has been received from the image acquisition instruction input device 4, and upon receiving the signal, the imaging device 1
The image supplied from 1 is transmitted to the image providing device 3 as an image.

More specifically, the input determination device 22 waits for an image acquisition instruction signal from the image acquisition instruction input device 4, and issues an image transmission request signal to the image transmission device 21 when receiving the signal.

The image transmission device 21 receives the image transmission request signal from the input determination device 22, captures the video information (video stream) supplied from the imaging device 11 as a still image (field), and transmits it to the image reception device 31. I do. The other party transmitting the image is the user who makes the offside determination, and is usually the referee on the field, so it is difficult to transmit the image using a wired connection. Therefore, the transmission of the image is transmitted to a remote place via wireless. To increase the speed of wireless transmission, images to be transmitted must be JPEG (Joint Photogr
The data may be transmitted after compression using the aphic coding experts group (Aphic Coding Experts Group) standard or the like. The JPEG standard is ISO / IE
C (International Organization for Standardization
/ International Electrotechnical Commission) 10
918.

In the image providing device 3, the image receiving device 31 receives the image transmitted from the image transmitting device 21, and the JPE
If the image is compressed by G or the like, it is decompressed and returned to the original image, and this image is displayed on an image display device 32 such as a liquid crystal display.
To be displayed. When the referee checks the image, the image providing device 3 is preferably a wristwatch-type display, a portable terminal, or the like that is easy to carry as shown in FIG. If the resolution for displaying the entire captured image cannot be secured on a small display, the image is initially displayed at a reduced resolution in accordance with the resolution of the display, and only the parts that the user deems necessary are displayed in high resolution. It is necessary to have an interface such as a touch panel type display that can be used.

The image acquisition instruction input device 4 is a device such as a switch or a push button for notifying a user such as a referee of an image acquisition time when a player holding a ball gives a pass to a teammate in the direction of the opponent's goal. It is. This device issues an image transmission request signal to the input determination device 22 at the same time that a switch or the like is pressed. When the instruction image transmitting device 2 is installed remotely, an image transmission request signal is instantaneously transmitted wirelessly there. When the image acquisition instructor and the person performing the offside determination are the same person such as the referee, the image acquisition instruction input device 4 may be incorporated in the image providing device 3. By arranging the button of the image acquisition instruction input device 4 on the side of the portable terminal of the image providing device 3, it is possible to instruct the time of image acquisition with the thumb while holding the portable terminal with one hand, and at the same time on the offside line The image can be confirmed.

(2) Second Embodiment Next, a second embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 7 is a block diagram showing a configuration of an offside determination assisting device according to a second embodiment of the present invention. The offside determination assisting device according to the present embodiment is different from the offside determining assisting device according to the first embodiment illustrated in FIG. The only difference is that a video storage device 23 for storing the video is provided. The video storage device 23 is a storage medium such as a memory and a hard disk. Past images are sequentially stored in this storage medium. Since the storage capacity is limited, when storing data exceeding a certain capacity, the latest video can always be stored by deleting the oldest video and adding the latest video.

By accumulating the latest video in this way, not only the image at the time when the image acquisition instruction signal is received from the image acquisition instruction input device 4 but also the video before and after the time is continuously displayed. It can be provided as a still image group or a moving image. For the offside determination, it is sufficient if there is an image of about 2 seconds before and after the attention time.

The image transmission device 21 transmits an enormous amount of video when transmitting it as a moving image.
This is transmitted after compressing the moving image using the standard such as the “Simulation Experts Group” standard. The MPEG standard is IS
O / IEC (International Organization for Standardi)
zation / International Electrotechnical Commissio
n). As the imaging device 11, an even field or odd field video (720
× 240 pixel size), MPEG-2
The compression may be performed by using. The reason is MPEG-2
This is because compression is possible with an arbitrary image size of 720 × 576 or less.

The image display device 32 has an interface such as a push button for performing reproduction, frame advance, and the like of the moving image received and expanded by the image receiving device 31. As a way of providing video, the image at the time when the image acquisition instruction was first issued is displayed, reverse slow playback is performed while the [return] button is kept pressed, and slow playback is performed in the forward direction when the button is released. . Accordingly, when it is difficult to perform the offside determination based on the image at the time when the image acquisition instruction is issued, the moving images before and after the time can be confirmed, so that the movement flow of each player can be grasped.

According to the second embodiment, in addition to the effects of the first embodiment, it is also possible to provide images before and after the time to be subjected to the offside determination. However, by referring to the flow before and after the time for performing the offside determination, there is an effect that more accurate determination material can be provided.

(3) Third Embodiment Next, a third embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 8 is a block diagram showing a configuration of an offside determination assisting device according to a third embodiment of the present invention. The offside determination assisting device according to the present embodiment is different from the offside determining assisting device according to the first embodiment shown in FIG. Image analysis device 14 that supplies a control command to control device 13 so that a player on the offside line is captured at a specific position on the screen by image analysis of the video.
The only difference is that is provided.

This makes it possible to automate the control of the driving device 12 which was manually performed by the user.

Next, the operation of the image analyzer 14 will be described.
This will be described in detail with reference to FIGS.

The representative colors of the uniforms of both team players (including the color of the keeper's uniform) are registered in advance. The RGB data representing the color of the uniform by the luminance values of red, green, and blue is converted to YIQ data represented by a luminance signal and a color difference signal. Since the luminance signal Y is likely to change due to the influence of lighting, IQ is adopted as the registered color data. The conversion equation from RGB to YIQ is represented by Equation 1 (see "Image Processing and Recognition" (Takeru Asaiin, Tomoharu Nagao, Shokodo, 1994)).

[0065]

(Equation 1)

Off-side line imaging device 1 for each side
For each A, 1B, the attacking player on that side
The color data of the defensive player / keeper uniform is (Io, Qo), (Id, Qd), (Ik,
Qk).

At the start of the match, the offside line image pickup device 1 is set at a position where the rearmost player excluding the keeper on the defense side appears in the image of the image pickup device 11. In the setting method, the position may be determined manually. Also, the offside line imaging device 1 can be automatically set by moving the offside line imaging device 1 from the goal line position toward the center line of the field until the uniform color of the defending player excluding the keeper is found on the screen (see FIG. 9). Step A0).

An image as shown in FIG. 10 is obtained from the imaging device 11 (step A1 in FIG. 9).

Next, the area of the player in the obtained image is extracted (step A2 in FIG. 9). As a method to extract the player area, first remove the mask on the area other than the area on the image where the player is considered to be present, and extract the area similar to the registered uniform color in the remaining area Is used. The RGB luminance value of each point in the image is converted into a YIQ value, and the IQ value is (Io,
Pixels close to (Qo), (Id, Qd) and (Ik, Qk) are assumed to be an attacking player pixel, a defensive player pixel, and a keeper pixel, respectively.

To determine whether the IQ value (Ip, Qp) at pixel p is close to the color of the registered uniform,
A determination using preset threshold (Th _I, Th _Q) a. When the pixel p satisfies the expression 2, it is determined as the attacking player region, when the expression 3 is satisfied, the defense player region, and when the expression 4 is satisfied, the pixel p is determined as the defense keeper region.

[0071]

(Equation 2)

[0072]

(Equation 3)

[0073]

(Equation 4)

Subsequently, the area where the extracted attack player pixels are gathered (attack player area) is gray and the area where the defense player pixels are gathered (defensive player area) is black. If only an area having a certain value or more is selected, an image as shown in FIG. 11 is obtained. This process is called segmentation. A region having an area smaller than a certain value is regarded as noise (step A in FIG. 9).
3).

Next, the obtained defensive player area (FIG. 1)
1) is circumscribed by a circumscribed rectangle, and its upper left coordinate is represented by P1 (X
1, Y1) and the lower right coordinate is P2 (X2, Y2).
Similarly, the upper left coordinate of the circumscribed rectangle of the attacking player area is represented by A
1 (Xa1, Ya1), the lower right coordinate is A2 (Xa2, Ya2)
(See FIG. 12). At this time, since the right side on the screen is the goal side due to the arrangement of the offside line imaging device 1 shown in FIG. 2, the offside line is the rearmost position of the defensive player, and the position can be represented as P2. The information on the offside line position is stored as time-series information. When the defensive player area is not sufficiently extracted because the offensive player area overlaps the defensive player area, the current offside line position is estimated from a plurality of past offside line positions. As shown in "Applied Kalman Filter" (by Toru Katayama, Asakura Shoten, 1983), a Kalman filter that robustly estimates current data from past time-series data as noise is used for the estimation (step A4 in FIG. 9). ).

Subsequently, as shown in FIG. 13, the X coordinate position X2 of the last position P2 of the last player is compared with a preset reference position coordinate Xo (step A in FIG. 9).
5). If Xo> X2, the offside line is on the left side with respect to the reference position.
Is moved to the right (step A6 in FIG. 9). Xo
If = X2, since the offside line is at the reference position, it is determined that the offside line imaging apparatus 1 is to be stopped (step A7 in FIG. 9). If Xo <X2, the offside line is on the right side of the reference position, and thus it is determined that the offside line imaging apparatus 1 is to be moved to the left (FIG. 9).
Step A8). The determination result is supplied to the control device 13 (Step A9 in FIG. 9). At this time, the left and right moving speeds are changed in proportion to the magnitude of the absolute value | Xo−X2 | of the difference between Xo and X2. In this way, when the player moves abruptly from the center of the screen due to sudden movement of the player, the player moves so as to catch the player at the center of the screen at high speed, and when the difference from the center of the screen is small, Since the correction is performed, tracking can be performed without removing the player from the screen.

If the attacking player area extracted in step A4 is located on the right side of the offside line position X2, that is, if Expression 5 is satisfied, it can be determined that the attacking player is in the offside position (FIG. 9). Step A10).

[0078]

(Equation 5)

At this time, as shown in FIG. 14, a mark such as an arrow (offside mark) is drawn above the attacking player area located at the offside position to inform the user of the presence of the player at the offside position. (Step A11 in FIG. 9). Furthermore, by drawing a virtual straight offside line on the actual video and distributing it to the image transmission device 21, it is possible to provide a video that allows easy offside determination (step A12 in FIG. 9).

In a play that is not a target of offside determination such as at the time of a corner kick, the offside line imaging device 1 can be temporarily stopped by pressing a stop switch provided on the image acquisition instruction input device 4. When the normal play is started, when the reset switch is pressed, the offside line imaging device 1 is returned to the goal line position, the last player on the defense side excluding the keeper is detected again, and tracking is resumed.

As described above, according to the third embodiment, in addition to the effects of the first embodiment, the user can automatically perform the tracking operation of the last player, which has been performed manually, so that the burden on the user is increased. Has the effect of reducing. Furthermore, it is necessary to detect the offending attacking player at the offside position, provide the information to the user, and facilitate the offside determination by superimposing the virtual offside line on the actual image. Can be.

[0082]

The first effect is that it is possible to grasp the positional relationship of the players on the offside line at the time when it is determined to perform the offside determination. The reason is that an image capturing apparatus that captures an image on the offside line can quickly provide the user with an image at a time designated by the user.

The second effect is that it is possible to grasp the positional relationship of the player on the offside line viewed from the side or from above, where it is easy to accurately perform the offside determination. The reason is,
This is because an offside line imaging device is provided which moves the imaging device in parallel with the sideline using a driving device in accordance with the movement of the offside line, and images the offside line from the side or from above.

The third effect is that it is possible to provide a material that enables accurate determination based on the flow of the player's movement between before and after times even in an offside determination scene where determination is difficult. The reason is that a video storage device capable of providing a continuous still image or a moving image obtained by capturing scenes before and after a scene that is difficult to determine with a still image is provided.

The fourth effect is that the burden on the user can be remarkably reduced since the user does not need to track the offside line. The reason is that an image analysis device is provided for extracting the attacking and defending players using the captured images and controlling the position of the imaging device so that the last defending player is always tracked.

The fifth effect is to provide an image in which the positional relationship of the player on the offside line can be easily grasped. The reason is that it is possible to automatically extract the attacking player at the offside position, mark the player position on the screen, and additionally provide an imaginary offside line superimposed on the image. .

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of an offside determination assisting device according to a first embodiment of the present invention.

FIG. 2 is a diagram illustrating an installation example of an offside determination assisting device according to the first embodiment.

FIG. 3 is a diagram showing another installation example of the offside determination assisting device according to the first embodiment.

FIG. 4 is a diagram exemplifying a video of a player on an offside line supplied to the instruction image transmitting device in FIG. 1;

FIG. 5 is a view in which the image of FIG. 4 is rotated by 90 degrees about the line of sight so that the entire offside line can be seen over the zoom-up state.

FIG. 6 is a diagram showing an example in which the image providing apparatus in FIG. 1 is realized by a wristwatch type display, a portable terminal, or the like.

FIG. 7 is a block diagram illustrating a configuration of an offside determination assisting device according to a second embodiment of the present invention.

FIG. 8 is a block diagram illustrating a configuration of an offside determination assisting device according to a third embodiment of the present invention.

FIG. 9 is a flowchart illustrating processing of an offside determination assisting device according to a third embodiment.

10 is a diagram illustrating an example of an image acquired by the image analysis device in FIG. 8 from an imaging device.

11 is a diagram illustrating an image obtained by performing a segmentation on the image of FIG. 10;

12 is a diagram illustrating a state where a player area in the image of FIG. 11 is bounded by a circumscribed rectangle;

13 is a diagram showing that the last position of the last player in the image of FIG. 10 is compared with reference position coordinates.

14 is a diagram showing that an offside mark is drawn above a player area located at an offside position in the image of FIG. 10;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Offside line imaging device 2 Instruction image transmission device 3 Image providing device 4 Image acquisition instruction input device 11 Imaging device 12 Drive device 13 Control device 14 Image analysis device 21 Image transmission device 22 Input judgment device 23 Video storage device 31 Image reception device 32 Image display device

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H04N 5/232 H04N 5/232 B 7/18 7/18 Z F term (Reference) 5C022 AA01 AB62 AB65 AC27 AC69 AC74 AC78 5C054 AA01 CA04 CC02 CE12 CE15 CF06 CF08 CG02 CG08 CH01 CH02 DA07 EA01 EA03 EA05 EA07 EG06 FC11 FE04 GB01 GB05 GD01 GD07 HA16

Claims (19)

[Claims] 1. An offside line imaging device for acquiring an image on an offside line, an image acquisition instruction input device for instructing a time of an image to be displayed on an image providing device described later,
An instruction image transmitting apparatus that transmits an image on an offside line at a designated time in a video acquired by the offside line imaging apparatus, and an image providing apparatus that receives and displays an image transmitted from the instruction image transmitting apparatus. An offside determination assisting device, comprising: 2. The imaging device according to claim 1, wherein the offside line imaging device is an imaging device that captures an image, a driving device that moves the imaging device in a direction and at a speed instructed, and an imaging device that captures an offside line with the imaging device. The offside determination assisting device according to claim 1, further comprising a control device that controls the driving device. 3. The offside determination assisting device according to claim 2, wherein the control device is a direction indicating device provided with a joystick, and is manually operated by a user. 4. An input determination device for generating an image transmission request signal when the instruction image transmission device detects an image acquisition instruction signal from the image acquisition instruction input device, and an image transmission request signal from the input determination device. The apparatus according to claim 1, further comprising: an image transmission device that transmits a video acquired from the imaging device as an image when receiving a signal. 5. The image providing apparatus according to claim 1, further comprising: an image receiving device that receives an image transmitted from the instruction image transmitting device; and an image display device that displays an image supplied from the image receiving device. The offside determination assisting device according to claim 1, wherein 6. The offside determination assisting device according to claim 1, wherein said image acquisition instruction input device is a push button for instructing a time to acquire an image. 7. The apparatus according to claim 1, wherein said instruction image transmitting device includes a video storage device for storing a captured video, and the transmitted and received images are a plurality of still images or moving images.
An offside determination assisting device according to claim 4. 8. The apparatus according to claim 7, wherein in the image providing apparatus, an image to be displayed can be selected from a plurality of still images and moving images in accordance with a user's instruction. 9. The offside determination assisting device according to claim 2, wherein the imaging device is moved by the driving device in parallel with a side line. 10. The offside line image pickup device includes an image analysis device for estimating an offside line position by detecting a position of a ball or a player from a picked-up image, and the offside line position is picked up by the image pickup device. The offside determination assisting device according to claim 1 or 2, wherein the position of the image pickup device is automatically controlled so that the position of the image pickup device is controlled. 11. The offside determination assisting device according to claim 10, wherein the image analysis device determines the last player position of the defending team excluding the goalkeeper in the case of soccer as an offside line position. 12. The offside determination assisting device according to claim 10, wherein the image analysis device draws and presents the estimated offside line on a captured image. 13. The offside determination assisting device according to claim 10, wherein the image analysis device draws and presents a mark of the player at the detected offside position on a captured image. apparatus. 14. The offside determination assisting device according to claim 1, wherein said instruction image transmitting device and said image providing device transmit and receive images wirelessly. 15. The image forming apparatus according to claim 1, wherein the image providing device is a portable terminal in which the image providing device and the image acquisition instruction input device are integrated. Offside judgment assist device. 16. A pair of said off-side line imaging devices are installed on rails laid on both side lines of a field, and each of said off-side line imaging devices tracks an off-side line on each side of a field. The offside determination assisting device according to claim 1, wherein: 17. The pair of offside line imaging devices are arranged on the side line opposite to the assistant referee in charge of the same side so as not to obstruct the moving range of the assistant referee. The described offside determination assisting device. 18. The apparatus according to claim 16, wherein the offside line imaging apparatus is installed at an angle of view overlooking a field by increasing the installation height. 19. The apparatus according to claim 16, wherein said offside line imaging device is installed by suspending a rail at a height of a field.