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* '''Record''' – In this case continuous events of a fixed length are generated regardless of motion which is analogous to a convention time-lapse video recorder. No motion detection takes place in this mode. * '''Record''' – In this case continuous events of a fixed length are generated regardless of motion which is analogous to a convention time-lapse video recorder. No [[motion detection]] takes place in this mode. * '''Nodect''' – or No DEteCTtion. This is a special mode designed to be used with external triggers. In Nodect no motion detection takes place but events are recorded if external triggers require it.* '''Nodect''' – or No DEteCTtion. This is a special mode designed to be used with external triggers. In Nodect no [[motion detection]] takes place but events are recorded if external triggers require it.=== Zones ====== [http://www.zoneminder.com/wiki/index.php/Documentation#Defining_Zones Zones] ===* Alarmed Pixels - This image shows all pixels in the zone that are considered to be alarmed as white pixels and all other pixels as black. * Alarmed Pixels - only a count of individual alarmed pixels should be used to determine the state of a image.* Filtered Pixels - This is as stage one except that all pixels removed by the filters are now black. The white pixels represent the pixels that are candidates to generate an event. * Filtered Pixels - the pixels should be filtered to remove isolated pixels before being counted.* Raw Blobs - This image contains all alarmed pixels from stage 2 but aggrageted into blobs. Each blob will have a different greyscale value (between 1 and 254) so they can be difficult to spot with the naked eye but using a colour picker or photoshop will make it easier to see what blob is what. * Blobs - a more sophisticated analysis which is designed to aggregate alarmed pixels into continuous groups, or ‘blobs’. * Filtered Blobs - This image is as stage 3 but under (or over) sized blobs have been removed. This is the final step before determining if an event has occurred, just prior to the number of blobs being counted. Thus this image forms the basis for determining whether an event is generated and outlining on alarmed images is done from the blobs in this image. === Parameters === * Min/Max Pixel Threshold -* Filter Width/Height - this filter removes any tiny or discontinuous pixels that don't form part of a discrete block.* Min/Max Alarmed Area - the minimum and maximum number of pixels that exceed this threshold that would cause an alarm.* Min/Max Filtered Area - * Min/Max Blob Area - only the Minimum is likely to be very useful.* Min/Max Blobs - the limits of the actual number of blobs detected.