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Operation of the detection of moving against crowd flow is controlled by the following parameters:

1. Movement against a crowd – —direction reversed to the direction in which a crowd is moved moving in the video image. Direction of crowd movement is called the right direction.
2. Number of people in a crowd – minimal —minimum number of people moved moving in the direction of a crowd movement in at which the detection should trigger.

Detection will not function in case of If the number of people in a crowd moved moving in the right direction is less than the Number of people in a crowd parameter, the detection won't trigger.
If the number of people moved in a crowd moving in the right direction is more greater or equal to the Number of people in a crowd, then:

• detection functions if the number of people moved moving against a crowd is from 1 to 2 includedinclusive, the detection will trigger;
• detection doesn't function if the number of people moved moving against a crowd is 3 or more;, the detection doesnwon't function trigger;
• if there is are no people moved moving against a crowd, the detection won't trigger.

There will not new detection triggers while a person on which detection functioned is stayed in won't be new triggers, until the person on whom the detection triggered, leaves the monitored area.

Example. A steady flow of people goes against a crowd. In the monitored area, only 1 or 2 persons move against a crowd. In this case, only one trigger will happened happen when the first person will go against a crowd. New triggers will not happen There won't be new triggers until a flow moved moving against a crowd will not stoppeddoesn't stop.
If all people moved moving against a crowd are out of left the monitored area, i.e. in the monitored area , there is only a crowd moved moving in the right direction in the monitored area, and a new person moved moving against a crowd enter enters the area, then the detection will functiontrigger.