As shoot often happens near forbidden zone, and forbidden zone lines in a long-view shot can be detected to find forbidden zone, which can help shoot event detection.
射门事件通常是在禁区附近发生的，本文通过检测禁区线实现对禁区的检测，从而辅助射门事件的检测。
2
Blowout preventing lines shall be connected by threads and standard flanges, and on site welding is forbidden. Field welding is not permitted.