“…Most methods are designed for a much confined scenario, such as focusing on a specific class of objects like roads [6], vehicles [4,10], trees [15,14,9], and buildings [7,3,11]. In these cases, either the scenario is relatively simple that contains only a few objects [8], or the input objects have been segmented from the scene. The theme of these papers is mainly related to recognition and reconstruction of a specific class of objects where object recognition (or classification) techniques play a central role.…”