The neural network will help to beat a professional player in table tennis
Source:Neural networks have already reached such a level that can beat chess or go players. Using machine learning scientists teach neural network, create a realistic simulator and then a real player tries to fight the power of the algorithm on the computer. However, while no one came to mind to use neural networks in active sports such as playing table tennis. And we are not talking about some kind of computer simulation and the real game with a real contender.
Programmers from Japan managed so well to train the network that it is in the real-time learned how to determine where to drop the ball when playing table tennis. But one thing, if a neural network just to track the trajectory of movement of a ball — it's nothing amazing. The most interesting thing here is that the AI starts to calculate the potential trajectory of movement of the player, even before his racket touched the ball.
The key to a successful game of table tennis lies not only in the ability of the player to accurately hit the ball to the side of the opponent's table, it also needs to be in the right place on the other side of the table to be able to send the ball in the opposite direction. So the engineers have already developed a robot that can play table tennis, tracking the trajectory of the ball. The robot begins his blunder only after hitting the racket, as if "grabbing" the ball. However, a professional player knows where to be to beat, even before you raise the racket, therefore, tracking only one ball is often not as effective.
neural Network, which plays table tennis
So Japanese programmers decided to develop a neural network that can determine the potential movement of the ball during the backswing the racket — the movement of the hands and body of the player. But one neural network would not have done so had created a second neural network, which works in tandem with the first, all of them with different objectives and architecture. The first neural network processes data from the web camera, which is installed by the host of the player: it frame by frame, calculates the position of the hands and body feed of the player.
After that, it takes a second neural network which receives the processed data, and it is on this basis calculates the crash site of the ball. Next, project the resulting point is displayed on table tennis, and engineers match the real place of the ball drop and then that was calculated by neural networks.
According to the programmers, they self-collected all of the data for training. They analyzed a lot of real games in table tennis, with an installed camera, which recorded the flight of the ball with a speed of 240 frames per second. To gather as much source data, developers downloaded record tennis serves with real games from the Internet.
the calculation is based on two neural networks
In the end, the algorithm began to work with surprising accuracy. On average, the neural network was able to recognize accurately drop the ball on a table tennis table in 75% of all cases. Interestingly, the algorithm was tested both on professional players and for Amateurs, and in the case of the first neural network worked even better. The fact that the professional player in table tennis for many years has developed a distinctive movement, which he does before serving the ball, and the fan often delivers in different ways.
This Raises a logical question — but if one were to take a person who has never played table tennis, and to let him have the run of the algorithm? Engineers also it became interesting, and they tested the neural network during the game between a professional and normal. As a result, when using neural networks regular player successfully fought off the submission for 20% more often than without them.
This clearly shows that the use of neural networks is not limited. They can search by picture, to calculate the most active or act as a voice assistant (the same Alice already as close in its behaviour to the real person). Or to locate tumors in the images, to fight fraud and so on. And last year, neuroscientists have trained a neural network to translate brain signals into intelligible speech! In the future, such devices will be able to use the people who have lost the ability to speak as a result of injury or disease. Or it can be used just for . But it already sounds like something not so nice, right?
Now you can beat even the world champion in table tennis! Well, almost
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