False counts. Not enough objects tracked

Calibration. Person size too big.

Adjust person size.

Background model. Sensitivity too low.

Increase sensitivity of the background model.

  

Trouble detecting people with dark clothing against a dark background (or light clothing against a light background).

Increase the brightness sensitivity in the Multilayer Hybrid Background model (on the Environment tab).

or

Switch to the hybrid model and increase brightness sensitivity.

False counts. Too many objects tracked.

Real person tracked as two or more people.

Calibration. Person size too small.

Adjust person size.

Many objects throughout the scene.

Background model. Sensitivity too high.

Decrease the sensitivity of the background model.

Shadows or lighting changes.

Decrease brightness sensitivity.