1. A method for monitoring a queue comprising: receiving by one or more sensors a non-visual identifier at predefined locations of a queue to identify an object possessing the non-visual identifier; capturing by one or more image capture devices images of the object possessing the nonvisual identifier at the predefined locations of the queue to associate at least one predefined feature with the object; visually tracking another object in the queue based on transformations of the at least one predefined feature extracted from the images of the object possessing the non-visual identifier at the predefined locations, and generating a feature transformation map to model changes of the at least one predefined feature at locations throughout the queue by building relationships between each location and the captured images so that visual changes in the captured images of the object possessing the nonvisual identifier are predictable, and that the another object can be identified and localized within the queue without possessing the non-visual identifier.