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The moment light reaches the image sensor, pixels then record how much light they receive. These dark and light areas then form the video images that we see. Motion detection works by comparing successive video images. So if the pattern of light changes between frames a change in pixels the smart camera concludes that something has moved and starts to record. As it begins to record, it also sends you an alert. The camera determines when enough has changed based on the motion detection settings see below.

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There are many more private security officers than public police officers, making tandem projects and collaboration essential "Private Security and Public Law Enforcement," n. d. There may be some overlap between public law enforcement and private security, but generally the latter can be more highly specialized and are therefore useful in situations such as campus security. Large privately owned facilities like the campus stadium require a dedicated staff of personnel, rather than a sporadic or incident response team. Therefore, security at the stadium during games can be best provided by the private sector. The public law enforcement agencies in the community can and should be alerted as to when games…… Private security industry impact of the September 11, 2001 terrorist attacks on the private security field. Clearly, the private security industry, and all security, was impacted by the September 11 terrorist attacks in New York, Washington D. C. And Pennsylvania. Airport and border securities were tightened, and many Americans turned to private security firms to ensure their own personal safety.