TLD is an award winning, real-time algorith for tracking of unknown objects in video sreams. The object of intrest is defined by a bounding box in a single frame. TLD simultaneously Tracks the object, Learns its appeareance and Detects it whereever it appears in the video. the result is a real-time tracking that typically improves over time.
Due to its learning abilities, TLD has been advertised under the name Predator. The video below introduces Predator.