
244 • Playing Back Recorded Video/Audio XX112-36-00 Rev 909 Kollector Hybrid Network Digital Video Recorder
Option Description
The Minimum Number of Blocks selector enables you to define how many blocks of the colored
grid arrays must be simultaneously involved in the change, compared to the reference frame, before
a detection is recognized. For example:
• 1 (the most sensitive setting) – indicates that a detection should be recognized if a change is
detected in even one block amongst all the defined ROIs (that is, the triggering is unlimited).
• 16 (the least sensitive setting) – indicates that the change must be simultaneously detected in at
least 16 blocks within the entire view area. The blocks do not have to be contiguous.
NOTE: The selected minimum cannot exceed the total number of blocks defined in ROIs.
The Show Grid button applies a gray planning grid to the parts of the window where no ROIs
(colored grid blocks) are defined. The gray grid is only for purposes of viewing where ROIs may
potentially be defined and does not affect the change-detection process. When selected, the button
changes into a Hide Grid button by which the planning grid can be suppressed, making only the
"active" colored grid blocks visible.
How Episodes Are Determined
Episodes are sequences of consecutive frames in which significant differences in ROIs are detected. An
episode includes all the frames related to a unique event for which the minimum event duration is determined
by the Detect only episode longer than criteria and the required amount of changes of most frames is
determined by the Minimum Number of Blocks criteria.
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