1. A method for monitoring objects, the method comprising: receiving a plurality of images of an area; identifying an object in the area from the plurality of images; identifying a plurality of points in a region within the area from a first image in the plurality of images, wherein the plurality of points has a fixed relationship with each other and the region; monitoring the object in the area to determine whether the object has entered the region; and responsive to identifying an absence of a number of the plurality of points in a second image in the plurality of images, determining, using a processor unit, that the object has not entered the region.