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It was seen as a cheaper way to deter crime compared to increasing the size of the police departments. Some businesses as well, especially those that were prone to theft, began to use video surveillance. From the mid 1990s on, police departments across the country installed an increasing number of cameras in various public spaces including housing projects, schools and public parks departments. CCTV later became common in banks and stores to discourage theft, by recording evidence of criminal activity. In 1998, 3,000 CCTV systems were in use in New York City. The studies included in the meta analysis used quasi experimental evaluation designs that involve before and after measures of crime in experimental and control areas.residential alarm systems
In some implementations, the event segments include one or more audio segments e. g. , corresponding to video segments. The event features data 31685 includes information regarding event features such as event categorizations/classifications, object masks, motion masks, identified/recognized/tracked motion objects also sometimes called blobs, information regarding features of the motion objects e. g. , object color, object dimensions, velocity, size changes, etc. , information regarding activity in zones of interest, and the like. The scene features data 31686 includes information regarding the scene in which the event took place such as depth map information, information regarding the location of windows, televisions, fans, the ceiling/floor, etc. , information regarding whether the scene is indoors or outdoors, information regarding zones of interest, and the like. In some implementations, the event features data includes audio data, such as volume, pitch, characterizations, and the like. The associated user information 31687 includes information regarding users associated with the event such as users identified in the event, users receiving notification of the event, and the like.