Information processing apparatus, control method, and program

A control method executed by one or more computers, comprising:

• detecting a queue of objects from video frame;
• generating, based on a plurality of the video frames detected the queue, an object area in the video frame occupied by the object included in the queue and a position information of the object in the queue;
• and
• detect that a first object leaves the queue in a case where the first object is not detected from the object area of the first object, it is detected that a second object enters into the object area of the first object, and it is detected that a third object is stationary, the first object having not been at ends of the queue, the second object having been at right behind the first object, the third object having been right before the first object.

A non-transitory storage medium storing a program causing a computer to execute a control method, the control method comprising:

• detecting a queue of objects from video frame;
• generating, based on a plurality of the video frames detected the queue, an object area in the video frame occupied by the object included in the queue and a position information of the object in the queue;
• and
• detect that a first object leaves the queue in a case where the first object is not detected from the object area of the first object, it is detected that a second object enters into the object area of the first object, and it is detected that a third object is stationary, the first object having not been at ends of the queue, the second object having been at right behind the first object, the third object having been right before the first object.