When a person enters someone's land or property without permission, it is considered trespassing and it is illegal. There are places that are restricted for strangers nearly all the time, such as residential areas, schools. There are also some places that are open for anyone during daytime, but are closed at night due to safety reasons. For example certain parks and outdoor sport courts. Entering those areas at night would be considered trespassing. The AI technology can detect automatically when the person enters the area.