US Patent 10180321 Calculating duration time in a confined space

Techniques are provided for calculating an average time people spend at a particular location, such as a store. A plurality of entrance times is identified, where each entrance time corresponds to when one or more objects entered the particular location. A plurality of exit times is also identified, where each exit time corresponds to when one or more objects exited the particular location. An average entrance time is determined based on the plurality of entrance times. An average exit time is determined based on the plurality of exit times. An average time people spend at the particular location is determined based on a difference between the average exit time and the average entrance time.