Landmark Object

A specific physical object that serves as the terminal target of a navigation task — for example, an empty chair in a waiting area, a push-button at an elevator, a ticket barrier, a door handle, or a counter at a shop. For blind travellers, landmark objects are the object of interaction, not just a waypoint: reaching the vicinity of the object is not enough, the user needs to be able to sit on it, press it, or pass through it. Modern computer-vision object detectors (YOLO, Mask R-CNN) and depth sensors enable assistive systems to recognise landmark objects, estimate their position and availability (e.g., whether a chair is empty), and guide the user directly to them at body scale.