Techniques for automatic real-time calculation of user wait time

A computer-implemented technique can process overhead images of users in a line at a venue to obtain a user wait time for the line. The processing can include (a) identifying a user of the group of users that is second in the line to obtain a target user, (b) detecting when the target user becomes first in the line to obtain a start time, (c) after the target user becomes first in the line, detecting when the target user leaves the line to obtain an end time, (d) determining a period from the start time to the end time, and (e) calculating the user wait time by calculating a product of (i) the determined period and (ii) a quantity of the group of users in the line after the target user leaves the line. The calculated user wait time can then be output. 种计算机实现的技术，可以处理在场所处的队列中的用户的俯摄图像以获得队列的用户等待时间。该处理可以包括：(a)识别组用户中的在队列中排第二位的用户以获得目标用户，(b)检测目标用户何时在队列中排第位以获得起始时间，(c)在目标用户在队列中排第位之后，检测目标用户何时离开队列以获得终止时间，(d)确定从起始时间到终止时间的时长，以及(e)通过计算(i)所确定的时长与(ii)目标用户离开队列之后排成队列的所述组用户的数量的乘积，来计算用户等待时间。然后，可以输出所计算的用户等待时间。