A method and apparatus for classifying an object in an image is disclosed. Edges of an object are detected within a region of interest. Edge analysis is performed on a plurality of sub-regions within the region of interest to generate an edge score. The object is classified based on the edge score. ...http://www.google.co.uk/patents/US20050232491?utm_source=gb-gplus-sharePatent US20050232491 - Method and apparatus for differentiating pedestrians, vehicles, and other objects