Classifications

• • A—HUMAN NECESSITIES
  • A63—SPORTS; GAMES; AMUSEMENTS
  • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
  • A63B24/00—Electric or electronic controls for exercising apparatus of preceding groups; Controlling or monitoring of exercises, sportive games, training or athletic performances
  • A63B24/0003—Analysing the course of a movement or motion sequences during an exercise or trainings sequence, e.g. swing for golf or tennis
• • A—HUMAN NECESSITIES
  • A63—SPORTS; GAMES; AMUSEMENTS
  • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
  • A63B24/00—Electric or electronic controls for exercising apparatus of preceding groups; Controlling or monitoring of exercises, sportive games, training or athletic performances
  • A63B24/0021—Tracking a path or terminating locations
• • A—HUMAN NECESSITIES
  • A63—SPORTS; GAMES; AMUSEMENTS
  • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
  • A63B71/00—Games or sports accessories not covered in groups A63B1/00 - A63B69/00
  • A63B71/06—Indicating or scoring devices for games or players, or for other sports activities
  • A63B71/0605—Decision makers and devices using detection means facilitating arbitration
• • G—PHYSICS
  • G06—COMPUTING; CALCULATING OR COUNTING
  • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
  • G06T7/00—Image analysis
  • G06T7/20—Analysis of motion
• • A—HUMAN NECESSITIES
  • A63—SPORTS; GAMES; AMUSEMENTS
  • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
  • A63B24/00—Electric or electronic controls for exercising apparatus of preceding groups; Controlling or monitoring of exercises, sportive games, training or athletic performances
  • A63B24/0021—Tracking a path or terminating locations
  • A63B2024/0025—Tracking the path or location of one or more users, e.g. players of a game
• • A—HUMAN NECESSITIES
  • A63—SPORTS; GAMES; AMUSEMENTS
  • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
  • A63B24/00—Electric or electronic controls for exercising apparatus of preceding groups; Controlling or monitoring of exercises, sportive games, training or athletic performances
  • A63B24/0021—Tracking a path or terminating locations
  • A63B2024/0056—Tracking a path or terminating locations for statistical or strategic analysis
• • A—HUMAN NECESSITIES
  • A63—SPORTS; GAMES; AMUSEMENTS
  • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
  • A63B2220/00—Measuring of physical parameters relating to sporting activity
  • A63B2220/05—Image processing for measuring physical parameters
• • A—HUMAN NECESSITIES
  • A63—SPORTS; GAMES; AMUSEMENTS
  • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
  • A63B2220/00—Measuring of physical parameters relating to sporting activity
  • A63B2220/80—Special sensors, transducers or devices therefor
  • A63B2220/806—Video cameras
• • A—HUMAN NECESSITIES
  • A63—SPORTS; GAMES; AMUSEMENTS
  • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
  • A63B2220/00—Measuring of physical parameters relating to sporting activity
  • A63B2220/80—Special sensors, transducers or devices therefor
  • A63B2220/807—Photo cameras
• • A—HUMAN NECESSITIES
  • A63—SPORTS; GAMES; AMUSEMENTS
  • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
  • A63B2220/00—Measuring of physical parameters relating to sporting activity
  • A63B2220/80—Special sensors, transducers or devices therefor
  • A63B2220/83—Special sensors, transducers or devices therefor characterised by the position of the sensor
  • A63B2220/836—Sensors arranged on the body of the user
• • A—HUMAN NECESSITIES
  • A63—SPORTS; GAMES; AMUSEMENTS
  • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
  • A63B2225/00—Miscellaneous features of sport apparatus, devices or equipment
  • A63B2225/50—Wireless data transmission, e.g. by radio transmitters or telemetry
• • A—HUMAN NECESSITIES
  • A63—SPORTS; GAMES; AMUSEMENTS
  • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
  • A63B2243/00—Specific ball sports not provided for in A63B2102/00 - A63B2102/38
  • A63B2243/0025—Football
• • A—HUMAN NECESSITIES
  • A63—SPORTS; GAMES; AMUSEMENTS
  • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
  • A63B2243/00—Specific ball sports not provided for in A63B2102/00 - A63B2102/38
  • A63B2243/0037—Basketball
• • A—HUMAN NECESSITIES
  • A63—SPORTS; GAMES; AMUSEMENTS
  • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
  • A63B2243/00—Specific ball sports not provided for in A63B2102/00 - A63B2102/38
  • A63B2243/0066—Rugby; American football
• • A—HUMAN NECESSITIES
  • A63—SPORTS; GAMES; AMUSEMENTS
  • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
  • A63B43/00—Balls with special arrangements

Definitions

• the present invention relates to a device for real-time acquisition and processing of the position and / or physical performance of one or a plurality of people playing on a field, in particular of sportsmen playing on a sports field.
• the determination of the sports performance of a set of players poses, inter alia, the problem of determining their position at all times and, where appropriate, that of the ball on the field, as well as the problem of processing the various position information in order to extract useful information for the public or the athletes themselves.
• the acquisition of sports performance data (the number of strides, the number of marked areas in tennis, etc.) is done in a very rudimentary manner, mainly of manually and delayed, or in conditions not very close to real situations, as in the case of tests done in a medical environment.
• the devices known in the field of ball games do not allow automatic acquisition and processing in real time of position information of people on a field.
• the known devices would require that one make a manual entry of the game events using specific keyboards, then that one uses this data to build diagrams, statistics or others, for the purpose of teaching or televised broadcast.
• the invention aims to provide a device which solves the problems posed by the devices and methods of the state of the art, and which generally makes it possible to automate the acquisition real-time sports statistics, and to generalize their use, whether in real time or delayed.
• the object of the invention is to propose a method and a device which can analyze in real time the physical performance of one or more athletes playing on a sports ground, in allowing automatic entry in real time of a multitude of parameters describing physical activity of athletes, as well as the graphic representation of these parameters.
• the invention relates to a method and a device for acquiring and processing data relating to one or more persons playing on a field, in particular players playing on a sports field, having the characteristics summarized below.
• the device is characterized in that it comprises: a) means for real-time acquisition of the individual instantaneous position of each person on the ground; b) digital processing means associated with said acquisition means for determining a set of digital quantities representative of the physical performance of said people, from said instant position information; c) interface means connected to said digital processing means and ensuring the preparation of digital quantities representative of physical performance, and their graphic representation.
• It includes means for acquiring and processing the instantaneous position of an object, in particular a ball on a sports field, said means being coupled to means for acquiring and processing the position of athletes, so as to determine a set of numerical quantities representative of the interactions between said athletes and said ball.
• said means for acquiring the instant position of an object are constituted by video-digital means for pattern recognition, the exact instant position of the object being determined by recognizing birth of the shape of the object at a place on the ground where it has been determined that the object is located, using mobile tracking techniques;
• Said means of real-time acquisition of the individual instantaneous position of each person on the ground comprises on the one hand miniaturized radio frequency transmitters carried by the people, and on the other hand, a set of at least three receivers radiofrequency direction-finders calibrated on the frequency of each of said transmitters so as to detect several times per second the instantaneous position of each transmitter on the ground, by triangulation from the emission directions of each transmitter.
• said video-digital acquisition means comprise a set of at least two fixed and constant focal length video-digital cameras, pointed in the direction of the ground and arranged so that their optical axes are substantially perpendicular to each other, the output digital of each camera being connected to the input of an electronic card for storing the instant digital image and the immediately preceding image, the output of each of said memory cards being connected to a module for subtracting said digital image instantaneous and from said immediately preceding digital image, the respective outputs of each image subtraction module being connected to the input of respective mobile tracking and pattern recognition modules, the outputs of each of said tracking and recognition modules of forms being connected to a module for calculating the trajectory of the object in a fixed repository linked to the terrain.
• said interface means comprise a multimedia computer comprising in particular a central processing unit, a connection bus between said central unit and said digital processing and digital video processing means, a display screen said digital quantities, and means for representing sounds of messages associated with said digital quantities.
• said multimedia computer further comprises memory means for storing screen display models corresponding to a plurality of contexts of use or of sports disciplines, and means for selecting from memory among said plurality of contex ⁇ to configure the device according to a particular context.
• said multimedia computer includes means for controlling and managing the positions of the direction-finding receivers and digital video cameras around the field, means for managing and editing a set of parameters associated with each team and / or each athlete of a team present on the ground, and means of preparation and display of synthetic images representing a view of the sky from the field, of the athletes, their movements and their performances.
• the method according to the invention is characterized in that it comprises the steps consisting in: a) initializing the device by assigning to each player on the field a transmitting device and at least one corresponding goniometric receiver and by assigning to the ball a couple of digital video cameras, for determining the instantaneous position of said players and said ball; b) generate sequences of successive images representing respectively the instantaneous successive positions of each player and / or of the ball on the field, as seen from the sky; c) memorizing said sequences in storage means associated with processing means; d) using said processing means, filter said sequences, so as to obtain from the data of position, trajectory data of each player and / or ball as a function of time; e) from position and trajectory data, calculate in real time and several times per second, a set of values and / or statistics representative of the performance of each player; f) display said values and / or statistics.
• FIG. 1 shows a general plan view illustrating a sports field equipped with the main components of the device according to the invention
• FIG. 1 shows a block diagram of the device of Figure 1;
• FIG. 3 shows a block diagram of the video acquisition and processing of the position of a mobile part on the ground, for the purpose of lo ⁇ calization of a ball or the like;
• FIG. 4 shows a more detailed view of the part of the device according to Figure 1, responsible for the determination by goniometric radio detection of the position and the trajectory of the players on the field;
• FIG. 5 shows a block diagram of the elements of calculation and interface of the device with the users
• FIG. 6 shows a time diagram showing the sequencing of the main steps of the method according to the invention.
• the acquisition and processing device 1 mainly comprises acquisition means 3, 5 for the detection and acquisition, respectively, of the instantaneous position of each player 7 on a field sports 9, and the instantaneous position of a ball 11, means 13 for digital processing of position data, and interface means 15 ensuring the preparation of digital quantities representative of physical performance, and their representa ⁇ graphics.
• the means for acquiring the position of the players 3 consist on the one hand of a set of miniaturized radiofrequency transmitters (not shown), carried by the players, and of a set of radiofrequency antennas 17 intended to receive the radio signals from transmitters.
• the various radio signals received are processed by goniometric receivers 19 which determine the directions of transmission of the transmitters, the digital processing means 13 using known triangulation methods to determine the position of a mobile transmitter from the direction of several signals received from direction-finding receivers 19.
• the transmitters worn by the players are conventional, and small enough to be easily integrated into a piece of equipment thereof, for example their shorts or a belt buckle.
• Each transmitter transmits a common carrier radio frequency of the order of GigaHertz, the different carriers being separated by frequency bands of 25 Khz, as is common in radio transmission.
• the acquisition center 13 comprises a series of microprocessor cards. Each card can process the positioning of several transmitters.
• At least three direction-finding receivers 19 are required to locate a transmitter of given frequency. All of these direction-finding receivers are distributed around the field so that each radio transmitter is constantly detected and located by at least three different direction-finding receivers 19.
• the principle of these goniometric receivers 19 is already known, in particular in the context of goniometric detection systems used for rescue at sea.
• the digital processing of the position data obtained for each player is done by an electronic acquisition center 13, which uses as input the instantaneous transmission directions supplied by each goniometric receiver 19. From the transmission directions supplied by the various goniometric receivers 19 assigned to a player 7, the acquisition center 13 triangulates the instantaneous position of the player.
• Such electronic central units 13 are known per se and will not be described further. It should be noted that the accuracy of the instantaneous positions depends on the number of treatments that can be performed per second, and this all the more so when the players' circulation speed is high. Consequently, the direction-finding receivers 19 are chosen so as to be able to sample and process the signals coming from each antenna 17 at least five times per second, which corresponds to an acquisition frequency of at least five Hertz.
• the device 1 also comprises means for acquiring and processing the instantaneous position of an object, in particular a balloon, on the ground.
• These means are produced in particular in the form of at least two digital video cameras 5, fixed and at constant focal length, pointed in the direction of the ground and arranged so that their optical axes are substantially perpendicular to each other.
• the digital output of each camera 5 is connected to the input of a card electronic 21 for storing the instant digital image and the immediately preceding image.
• Such digital video acquisition cards are already known per se, and used for example for the recognition of shapes in robotics, with the assistance of techniques for tracking mobiles also known per se. As explained in more detail in relation to FIG.
• this electronic card 21 is connected at output to a module for calculating the successive instantaneous coordinates (or trajectory) of the object in ur * fixed reference frame linked to the terrain.
• This calculation module is preferably part of the electronic acquisition unit 13.
• the unit 13 works out by filtering (to avoid imprec ions linked to the measurements position individual) a digital image of each player's trajectory as a function of time.
• a computer 15 can also calculate, using conventional specific calculation programs, a series of statistics describing parameters of play or individual performance, like for example: the instantaneous speed of each player, his acceleration, his energy expenditure (from the distances covered and individual physiological data previously stored in a working memory of the central), the statistics of the game with ball, etc.
• the acquisition of the position data is carried out continuously, and specific interrogations on a parameter are carried out by the user by means of the computer 15 connected to the electronic central unit 13, ensuring an interface role between the central unit 13 and the user, in particular for the configuration of the device 1 and in the event of a change of player.
• the multimedia computer 15 comprises in a known manner a number of components (not shown) including a central processing unit. processing, a screen for displaying the calculated digital quantities, and means for the sound representation of messages associated with said digital quantities, for example synthetic sound messages announcing configuration assistance panels.
• the multimedia computer furthermore comprises memory means for storing screen display models corresponding to a plurality of contexts of use or sporting disciplines, and means of menu selection in the memory, among said plurality of contexts for configuring the device as a function of a particular context, such as for example the context of a football match.
• This multimedia computer also comprises means for controlling and managing the positions of the direction-finding receivers and digital video cameras around the terrain as a function of the selected context, and means for managing and editing a set of associated parameters. to each team and / or to each athlete of a team present on the field, as well as means of preparation and display of synthetic images representing a view of the sky of the field, of the athletes, of their movements and of their performance. These synthetic images are obtained by moving on the screen of the multimedia computer, graphic symbols whose movements are controlled by the real movements of the players as detected by the position acquisition means.
• FIG 2 shows in more detail the elements of the device 1 according to the invention. Only two locating devices of two different players have been shown, each device comprising three direction-finding receivers 19 provided with antennas 17, and each direction-finding receiver 19 comprising a device for determining the direction of emission of the corresponding transmitter.
• the different goniometric receivers 19 for calculating position are connected to the dialogue bus 23 connected to the central unit 13 ( Figure 1). On this dialogue bus is also connected the card 21 for digital processing of digital video images generated by digital video cameras 5 which determine the position of a balloon. Finally, the dialogue bus 23 is still connected to the multimedia computer 15.
• the latter comprises communication peripherals with the user of the device: screen 27, keyboard and mouse 29, and is also connected to a video control unit 31 and to a network interface 33 for the remote use of the device 1 according to the invention. All of these components are well known in the state of the art and will not be described further.
• the digital video cameras 5 are preferably placed in height with respect to the terrain, and so as to have their optical axes substantially perpendicular to each other. They are at a fixed focal distance, so as to more easily extract the coordinates of the balloon from the digital images generated.
• Each camera 5 is connected to a first memory card 35 which saves the image recorded by the camera at time T, and to a second memory card 37 which saves the previous image, that is to say that of the 'instant T-dt.
• a calculation module 39 performs the subtraction of the two preceding digital images, in order to eliminate the constant components of the images.
• the result of this subtraction is subjected to a respective microprocessor tracking module 41, known per se, which determines by pattern recognition from the images at times T and (T-dt), the successive positions of the balloon 11, thus obtaining a follow-up of the successive positions of the balloon, as recorded by the corresponding camera.
• the output of each tracking module 41 supplies an input to a microprocessor card 43 common to the two video processing lines, and using the detection operated by the modules 41 to calculate the three-dimensional coordinates of the ball 11 relative to the fixed reference frame linked to the terrain.
• a memory module 47 stores the configuration of the cameras 5, that is to say their position in the fixed frame of reference mentioned above.
• a dialogue module 45 provides the link with the main bus 23 for dialogue with the other elements of the device, and in particular the reception of the configuration commands from the cameras 5 and the transmission of the coordinates of the ball 11 to the acquisition center. 13.
• the main bus 23 is a broadband bus, of the commonly used type.
• FIG. 4 representing the part of the central acquisition unit 13 which supports the detection and monitoring of the position of the different players on the field.
• the acquisition unit 13 comprises for this purpose several microprocessor cards connected on the same support and connected to the main dialogue bus 23 by a suitable dialogue module 49, known per se. This allows to adapt the number of microprocessor cards (Figure 2) working in parallel, depending on the number of players to supervise in real time on the field.
• microprocessor cards depends on the computing power of the microprocessors used, and on the frequency of acquisition of the position of the transmitters carried by the players.
• the module 51 manages the radio frequencies assigned to the different players in play.
• This module controls the goniometric receivers 19 to assign them in groups of three to the frequencies of the transmitters of the players in play, since a minimum of three goniometric receivers 19 are required to track a player.
• the increase in the number of goniometric receivers 19 per player increases the precision of the localization.
• a module 53 for managing the positioning of the antennas stores the configuration of the antenna array, that is to say the position of the antennas 17 and their orientation relative to the terrain.
• the information transmitted by the three direction-finding receivers 19 assigned to each transmitter carried by a player are taken by modules 55 from the main dialogue bus 23, through the dialogue module 49.
• a triangulation module 57 performs the calculation triangulation from these three transmission direction information, in order to determine the coordinates of the transmitter considered on the playing field.
• a filtering module 59 performs digital filtering of the trajectory of the player considered on a certain number of the last positions of the corresponding transmitter. This makes it possible to assign to the corresponding player, a coherent position at time T, in the playing space.
• the additional modules 55, 57 and 59 shown represent the same functionalities as those previously described for a transmitter number p assigned to a player number p.
• FIG. 5 representing in more detail a set of software tasks performed by the multimedia computer 15 (FIG. 1).
• This multimedia computer 15 consists of a sound card, a video card, an interface card 61 with the main dialogue bus 23, a communication card 63 for the connection with the telephone network or the network Ethernet for remote communication with other equivalent multimedia computers 15 belonging to other remote devices 1.
• This multimedia computer further comprises conventional elements not shown in FIG. 5, such as for example a color screen, a keyboard, a mouse, a magnetic hard disk, an optical disk backup system, etc.
• the memory of the multimedia computer 15 comprises a set of programs or application routines, the main functions of which are described below, and which are accessed in a conventional manner, in particular using the selection of a routine on a menu offered on the screen, using a mouse.
• a routine 63 makes it possible to select the language used for the man / machine interface and to choose the sport which is practiced on the sports field 9.
• a routine 65 makes it possible to enter the configuration and the fixed position, for the playing space considered, antennas 17 of goniometric receivers 19, as well as the position of digital video cameras 5.
• a module 67 is provided for the graphic representation in color of the jerseys of the different players and the entry of the names of the teams in competition.
• a routine 69 questions the user for the constitution of the match sheet, that is to say the entry of the names of the players for each team, and possibly of their substitutes.
• a routine 71 allows each player appearing on the match sheet to be assigned a transmitter number.
• a routine 73 makes it possible to confirm the names of the players actually in play, so as not to have to supervise the transmitters corresponding to the players possibly on the substitutes' bench.
• a routine 75 interrogates in real time the central acquisition unit 13, in order to acquire in real time the position coordinates of the players and of the ball on field. These data taken continuously from the main dialog bus 23 are stored continuously at 77 in the hard disk of the computer 15. Thus, the successive positions of the players and the ball will be available for the processing routines for calculating the desired physical performance.
• an appropriate routine 79 calculates the physical performance of the players from the coordinates of their respective trajectories on the playing field.
• This routine is programmed to calculate at least the total distance traveled by each player, his average speed, his speed maximum, the number of races, the average acceleration, or any other quantity obtained from instant position information representative of the players' physical performance.
• a routine 81 makes it possible to calculate statistics representative of the interactions of each player with the ball 11, from the position coordinates of each player and the trajectory of the ball, also stored in the hard disk 77 of 1 computer 15.
• a routine 83 is provided for generating a synthetic image of the sports field, for example from the sky.
• the players are symbolized in this synthetic image by their jerseys bearing their numbers. It is possible to predict the animation of this synthetic image in real time, according to the actual position of the players at the moment considered.
• a particular embodiment of the invention provides for the addition to the modules represented in FIG. 5, of a software module 85 of computer-assisted teaching, possibly connected to a video control unit 87 for sports pedagogy in group, and / or to a network interface 63 for retransmission or distance sports teaching.
• FIG. 6 the various operations carried out by the components of the device 1 according to the invention have been summarized, as a function of time.
• the blocks 90, 91 represent the tasks carried out at the level of the direction-finding receiver 19.
• the blocks 92 to 96 represent the tasks carried out by the digital video processing devices 21, the blocks 97 to 100 represent the tasks carried out by the central acquisition 13, the blocks 101 to 105 represent the tasks performed by the multimedia computer 15.
• all of the tasks can be divided into two categories, a first category of tasks performed during a phase 88 of acquisition of the positions of the players and possibly of the ball on the ground, followed by a phase 89 of calculation of numerical quantities linked to the players and / or to the ball, such as the performances of the players.
• the arrows 23 represent the transfers of information between tasks which take place on the bus 23 of the device.
• the different tasks are listed below: - 90: determination of transmitter position by a goniometric receiver 19;
• - 98 calculation of the position of the transmitters by triangulation
• - 99 filtering of the trajectory of the players wearing the transmitters
• the means of acquiring the position of the players could also be video means with pattern recognition, provided that they also have sufficiently powerful calculation and processing means at a reasonable cost. This would have the advantage of not having to dress players in radio transmitters.
• a system could be provided in which all of the position acquisition means, including those for detecting the bullet, use radio transmissions.
• the device locates the players and the ball and follows them as a function of time.
• the displacements as a function of time make it possible to determine useful magnitudes, in particular the displacements as a function of time or cumulative, speeds, accelerations, energy expenditure, biological rhythms, or others.
• the useful quantities can be selected from a menu available at any time, presented on the screen by a computer program as known per se.
• the device described above meets the set goals, and allows in particular to know automatically and in real time (several times per second), the position of the players and the ball on a sports field, then to automatically calculate and 'display a set of values or statistics representative of the progress of the game or the efforts of the players.

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• Health & Medical Sciences (AREA)
• General Health & Medical Sciences (AREA)
• Physical Education & Sports Medicine (AREA)
• Engineering & Computer Science (AREA)
• Multimedia (AREA)
• Computer Vision & Pattern Recognition (AREA)
• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• Theoretical Computer Science (AREA)
• Image Analysis (AREA)

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• 1993
  • 1993-09-20 FR FR9311371A patent/FR2710434B1/fr not_active Expired - Fee Related
• 1994
  • 1994-09-15 EP EP94926985A patent/EP0693206A1/de not_active Withdrawn
  • 1994-09-15 WO PCT/FR1994/001079 patent/WO1995008816A1/fr not_active Application Discontinuation

Non-Patent Citations (1)

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