Author: Zen and the Art of Computer Programming
In the early 1990s, American athletes used live TV to watch football matches, sports events, movies, music programs, and even sports rules. Thereby improving the athletes' sense of participation and promoting the communication and interaction among athletes. With the development of the times, a new technological revolution has begun to sweep the world, making e-sports rapidly mature. However, due to the continuous influx of athletes into the market, the scale of the competition has become larger and larger, resulting in more and more fierce competition among athletes. Since 2014, with the rise of national teams, the adoption rate of sports championships in various countries has shown a gradual downward trend. At present, the national team has defeated many teams including the Premier League, Serie A, and La Liga. But on the other hand, the national team also needs to cooperate with the players to improve their abilities in the process of seeking personal success. Therefore, how to use computer vision technology to analyze, evaluate and guide sports games has become a research hotspot. With the continuous update and iteration of technology, the traditional sports game video and image processing methods can no longer meet the new needs. Therefore, how to use computer cameras for data collection, image processing, recognition analysis, display of analysis results, and automation of related functions will become an important issue.
2. Explanation of basic concepts and terms
2.1 Camera system
A camera system consists of three parts: optics, zoom lens, and camera body.
1) Optical components: The basic working principle of the camera is to record, transmit and store image information by using the changing relationship between the electric light intensity and the spatial position. In order to be able to get a good photo, the optical element must first be able to correctly distinguish the light reflected by the object. The optical element is composed of three parts: the reflector in front of the camera, the exposure device in front of the camera, monochrome, red, green and blue three-color video lights, the first two parts are responsible for adjusting the intensity distribution of light; monochrome, red, green and blue three-color The video lights are respectively used to take images in three colors of red, green and blue. 2) Zoom lens: During the use of the camera, distortion or distortion often occurs due to the influence of ambient light or active transformation. In order to avoid this situation, the camera is usually equipped with a zoom lens, which can project light onto a wider picture. Zoom lenses change the position of the lens center,