| ||||||||||||||||||||||||||||||
Welcome to the | ||||||||||||||||||||||||||||||
 | ||||||||||||||||||||||||||||||
 | ||||||||||||||||||||||||||||||
All the bolt on bits of equipment ... | ||||||||||||||||||||||||||||||
| ||||||||||||||||||||||||||||||
By using pre programmed ‘algorithms’, the precise type of movement can be intelligently registered into the unit, to provide a more stable and reliable method of detecting intruders, without the problems associated with sudden lighting changes caused by the weather conditions. Whilst units are available as single channel or mini rack frame multi channel systems, there are also a number of multiplexers, DVR's, and indeed increasingly a few IP Video cameras, that offer some form of movement sensing, built in as standard. Taken to it’s logical conclusion, there are also units available that can be programmed to automatically ‘track’ the movement of a human target, using a PTZ or dome camera. As the individual moves across an open area, the remote control camera will automatically 'lock on' and follow their progress, without any operator input. Historically, advanced video based movement sensing devices were either used in high security locations, purely as a cost effective means of detecting intruders, or as a reasonably reliable method for switching on a video recorder when a target presented itself. In practice, this latter application is really less viable nowadays, particularly if the recorded material is in any way intended for evidence in Court. More appropriately, continuous Time Lapse or 'Real Time' DVR video recording is better suited to prove beyond reasonable doubt, that no other intruders have been present and missed, by the VMD failing to operate at a key moment. In other words, if you rely on a VMD to capture every intruder on video, if for whatever reason a suspect goes undetected, the defence may argue that their client may not have been the only person present that day, and the CCTV system simply failed to pick up the others. Put simply, Video Motion Detection is undoubtedly a very useful additional security tool, but should not be relied upon with absolute certainty of success. It is however proven to be a thoroughly useful technique when applied to specific areas of research, such as traffic monitoring, zoology, and human behavioural studies. | ||||||||||||||||||||||||||||||
 | ||||||||||||||||||||||||||||||
IMPORTANT: No material may be reproduced, copied or redistributed from this site, © doktorjon.co.uk 2004 - 2008 Homepage...:...Gateway...:...Technical Gateway....:....Quickfind Index....:....Equipment Directory | ||||||||||||||||||||||||||||||
 | | | | | | | | | | | | | | | | |||||||||||||||
